The amount of precipitation that falls over a given time. For example, a storm drops two inches of water per hour.
Used to calculate:rainfall
Varies by: month, precipevent and climate
| Used | month | precipevent | climate | Reference | Location: Ecosystem (study period) |
Value | Units | Notes |
|---|
| * | June | Clear day | Baseline Climate (1970-2010) | Assumed | New York City: Urban Area () | 0 | mm / hr | We have assumed there is no precipitation on a clear day. |
| * | June | Clear day | Future Climate in 2020s | Assumed | New York City: Urban Area () | 0 | mm / hr | We have assumed there is no precipitation on a clear day. |
| * | June | Clear day | Future Climate in 2050s | Assumed | New York City: Urban Area () | 0 | mm / hr | We have assumed there is no precipitation on a clear day. |
| * | June | Clear day | Future Climate in 2080s | Assumed | New York City: Urban Area () | 0 | mm / hr | We have assumed there is no precipitation on a clear day. |
| * | June | Clear day | Future Climate in 2100s | Assumed | New York City: Urban Area () | 0 | mm / hr | We have assumed there is no precipitation on a clear day. |
| * | June | Clear day | Past Climate in 1609 | Assumed | New York City: Urban Area () | 0 | mm / hr | We have assumed there is no precipitation on a clear day. |
| * | June | Rainy day | Baseline Climate (1970-2010) | NYC DEP 2008 Climate Change Program Assessment and Action Plan | New York City: Built ecosystems (1903-1951) | 0.65 | inches / hour | Drawn from the 1903-1951 NYC intensity-duration-frequency curve for a 2 year storm lasting 6 hours with an intensity of 0.65 in/hr. |
| * | June | Rainy day | Future Climate in 2020s | Rosenzweig & Solecki 2013 Climate Risk Information 2013 | New York City: Urban ecosystems (1971 - 2050) | 0.68 | inches / hour | Mid-range estimates are of the climate to be 0 - 10% more precipitation than in the baseline period (1971 - 2000). We increase precipitation intensity by 5% over the baseline climate scenario to simulate this change. |
| June | Rainy day | Future Climate in 2020s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 1.43 | inches / hour | This value is the highest outlier for future precipitation intensity for a rainy day in June during the 2020s. We calculated this value using 1.2 in/hr as the current rate for rainy days (NYC 2010 CEQR Technical Manual). Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Rainy day | Future Climate in 2020s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 1.126 | inches / hour | This value is the average of the calculated range of future precipitation intensities excluding outliers for a rainy day in June during the 2020s. We calculated this value using 1.2 in/hr as the current rate for rainy days (NYC 2010 CEQR Technical Manual). Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Rainy day | Future Climate in 2020s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 0.88 | inches / hour | This value is the lowest outlier for future precipitation intensity for a rainy day in June during the 2020s. We calculated this value using 1.2 in/hr as the current rate for rainy days (NYC 2010 CEQR Technical Manual). Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| * | June | Rainy day | Future Climate in 2050s | Rosenzweig & Solecki 2013 Climate Risk Information 2013 | New York City: Urban ecosystems (1971 - 2050) | 0.7 | inches / hour | Midrange projections for 2050 are increased precipitation of +5 to +10% over baseline (1971-2000) amounts. We increase the baseline intensity by 7.5%. |
| June | Rainy day | Future Climate in 2050s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 0.92 | inches / hour | This value is the lowest outlier for future precipitation intensity for a rainy day in June during the 2050s. We calculated this value using 1.2 in/hr as the current rate for rainy days (NYC 2010 CEQR Technical Manual). Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Rainy day | Future Climate in 2050s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 1.204 | inches / hour | This value is the average of the calculated range of future precipitation intensities excluding outliers for a rainy day in June during the 2050s. We calculated this value using 1.2 in/hr as the current rate for rainy days (NYC 2010 CEQR Technical Manual). Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Rainy day | Future Climate in 2050s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 1.58 | inches / hour | This value is the highest outlier for future precipitation intensity for a rainy day in June during the 2050s. We calculated this value using 1.2 in/hr as the current rate for rainy days (NYC 2010 CEQR Technical Manual). Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| * | June | Rainy day | Future Climate in 2080s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 0.72 | inches / hour | Midrange projections for 2080 are increased precipitation of +5 to +10% over baseline (1971-2000) amounts in Horton et al. (2009), however estimates in Horton et al. (2009) are approximately 5% less than in what a similar set of authors (Rosenzweig & Solecki 2013) estimated 4 years later for 2020 and 2050. Here we use the upper end of the Horten et al. range, and increase precipitation by 10% over baseline (1971-2000) levels. |
| June | Rainy day | Future Climate in 2080s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 1.193 | inches / hour | This value is the average of the calculated range of future precipitation intensities excluding outliers for a rainy day in June during the 2080s. We calculated this value using 1.2 in/hr as the current rate for rainy days (NYC 2010 CEQR Technical Manual). Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Rainy day | Future Climate in 2080s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 1.67 | inches / hour | This value is the highest outlier for future precipitation intensity for a rainy day in June during the 2080s. We calculated this value using 1.2 in/hr as the current rate for rainy days (NYC 2010 CEQR Technical Manual). Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Rainy day | Future Climate in 2080s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 0.95 | inches / hour | This value is the lowest outlier for future precipitation intensity for a rainy day in June during the 2080s. We calculated this value using 1.2 in/hr as the current rate for rainy days (NYC 2010 CEQR Technical Manual). Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| * | June | Rainy day | Future Climate in 2100s | Rosenzweig et al 2015 NPCC 2015 | New York City: urban area () | 0.7085 | mm / hr | Mid-range estimates are of the climate to be -1 - 19% more precipitation than in the baseline period (1971 - 2000). We increase precipitation intensity by 9% over the baseline climate scenario to simulate this change. |
| * | June | Rainy day | Past Climate in 1609 | Stahle et al. 1998 The lost colony and Jamestown droughts | Jamestown Colony, VA: Tidewater ecosystems (1185-1984) | 0.585 | inches / hour | Tree ring records indicate prolonged droughts in the 16th and 17th centuries at Jamestown. Assuming the same droughts affected the New York City region and climate change prior to 1971, we decrease precipitation intensities by 10% from the baseline (1971-2000) levels. |
| * | June | Severe storm | Baseline Climate (1970-2010) | NYC DEP 2008 Climate Change Program Assessment and Action Plan | New York City: Built ecosystems (1903-1951) | 1.1 | inches / hour | Drawn from the 1903-1951 NYC intensity-duration-frequency curve for a 100 year storm lasting 12 hour with an intensity of 0.65 in/hr. |
| June | Severe storm | Baseline Climate (1970-2010) | Assumed | New York City: Urban Area () | 5.95 | inches / hour | We have assumed that the precipitation intensity for a severe storm from 1970-2010 was 14.125 inches per hour. | |
| * | June | Severe storm | Future Climate in 2020s | Rosenzweig & Solecki 2013 Climate Risk Information 2013 | New York City: Urban ecosystems (1971 - 2050) | 1.155 | inches / hour | Mid-range estimates are of the climate to be 0 - 10% more precipitation than in the baseline period (1971 - 2000). We increase precipitation intensity by 5% over the baseline climate scenario to simulate this change. |
| June | Severe storm | Future Climate in 2020s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 16.809 | inches / hour | This value is the highest outlier for future precipitation intensity for a severe storm in June during the 2020s. We calculated this value using 14.125 in/hr as the current rate for a severe storm. Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Severe storm | Future Climate in 2020s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 14.266 | inches / hour | This value is the average of the calculated range of future precipitation intensities excluding outliers for a severe storm in June during the 2020s. We calculated this value using 14.125 in/hr as the current rate for a severe storm. Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Severe storm | Future Climate in 2020s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 10.453 | inches / hour | This value is the lowest outlier for future precipitation intensity for a severe storm in June during the 2020s. We calculated this value using 14.125 in/hr as the current rate for a severe storm. Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| * | June | Severe storm | Future Climate in 2050s | Rosenzweig & Solecki 2013 Climate Risk Information 2013 | New York City: Urban ecosystems (1971 - 2050) | 1.1825 | inches / hour | Midrange projections for 2050 are increased precipitation of +5 to +10% over baseline (1971-2000) amounts. We increase the baseline intensity by 7.5%. |
| June | Severe storm | Future Climate in 2050s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 18.645 | inches / hour | This value is the highest outlier for future precipitation intensity for a severe storm in June during the 2050s. We calculated this value using 14.125 in/hr as the current rate for a severe storm. Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Severe storm | Future Climate in 2050s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 10.876 | inches / hour | This value is the lowest outlier for future precipitation intensity for a severe storm in June during the 2050s. We calculated this value using 14.125 in/hr as the current rate for a severe storm. Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Severe storm | Future Climate in 2050s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 14.196 | inches / hour | This value is the average of the calculated range of future precipitation intensities excluding outliers for a severe storm in June during the 2050s. We calculated this value using 14.125 in/hr as the current rate for a severe storm. Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| * | June | Severe storm | Future Climate in 2080s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 1.21 | inches / hour | Midrange projections for 2080 are increased precipitation of +5 to +10% over baseline (1971-2000) amounts in Horton et al. (2009), however estimates in Horton et al. (2009) are approximately 5% less than in what a similar set of authors (Rosenzweig & Solecki 2013) estimated 4 years later for 2020 and 2050. Here we use the upper end of the Horten et al. range, and increase precipitation by 10% over baseline (1971-2000) levels. |
| June | Severe storm | Future Climate in 2080s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 11.159 | inches / hour | This value is the lowest outlier for future precipitation intensity for a severe storm in June during the 2080s. We calculated this value using 14.125 in/hr as the current rate for a severe storm. Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Severe storm | Future Climate in 2080s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 19.63 | inches / hour | This value is the highest outlier for future precipitation intensity for a severe storm in June during the 2080s. We calculated this value using 14.125 in/hr as the current rate for a severe storm. Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Severe storm | Future Climate in 2080s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 14.0555 | inches / hour | This value is the average of the calculated range of future precipitation intensities excluding outliers for a severe storm in June during the 2080s. We calculated this value using 14.125 in/hr as the current rate for a severe storm. Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| * | June | Severe storm | Future Climate in 2100s | Rosenzweig et al 2015 NPCC 2015 | New York City: urban area () | 1.199 | inches / hour | Mid-range estimates are of the climate to be -1 - 19% more precipitation than in the baseline period (1971 - 2000). We increase precipitation intensity by 9% over the baseline climate scenario to simulate this change. |
| * | June | Severe storm | Past Climate in 1609 | Stahle et al. 1998 The lost colony and Jamestown droughts | Jamestown Colony, VA: Tidewater ecosystems (1185-1984) | 0.99 | inches / hour | Tree ring records indicate prolonged droughts in the 16th and 17th centuries at Jamestown. Assuming the same droughts affected the New York City region and climate change prior to 1971, we decrease precipitation intensities by 10% from the baseline (1971-2000) levels. |
| * | June | Showers | Baseline Climate (1970-2010) | Assumed | New York City: Urban Area () | 0.4 | inches / hour | Assumed to be 0.4 in/hr for 2 hours, resulting in less than one inch of precipitation |
| * | June | Showers | Future Climate in 2020s | Rosenzweig & Solecki 2013 Climate Risk Information 2013 | New York City: Urban ecosystems (1971 - 2050) | 0.42 | inches / hour | Mid-range estimates are of the climate to be 0 - 10% more precipitation than in the baseline period (1971 - 2000). We increase precipitation intensity by 5% over the baseline climate scenario to simulate this change. |
| June | Showers | Future Climate in 2020s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 0.405 | inches / hour | This value is the average of the calculated range of future precipitation intensities excluding outliers for showers in June during the 2020s. We calculated this value using 0.4 in/hr as the current rate for showers (NYC 2010 CEQR Technical Manual). Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Showers | Future Climate in 2020s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 0.29 | inches / hour | This value is the lowest outlier for future precipitation intensity for showers in June during the 2020s. We calculated this value using 0.4 in/hr as the current rate for showers (NYC 2010 CEQR Technical Manual). Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Showers | Future Climate in 2020s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 0.48 | inches / hour | This value is the highest outlier for future precipitation intensity for showers in June during the 2020s. We calculated this value using 0.4 in/hr as the current rate for showers (NYC 2010 CEQR Technical Manual). Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| * | June | Showers | Future Climate in 2050s | Rosenzweig & Solecki 2013 Climate Risk Information 2013 | New York City: Urban ecosystems (1971 - 2050) | 0.43 | inches / hour | Midrange projections for 2050 are increased precipitation of +5 to +10% over baseline (1971-2000) amounts. We increase the baseline intensity by 7.5%. |
| June | Showers | Future Climate in 2050s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 0.53 | inches / hour | This value is the highest outlier for future precipitation intensity for showers in June during the 2050s. We calculated this value using 0.4 in/hr as the current rate for showers (NYC 2010 CEQR Technical Manual). Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Showers | Future Climate in 2050s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 0.3 | inches / hour | This value is the lowest outlier for future precipitation intensity for showers in June during the 2050s. We calculated this value using 0.4 in/hr as the current rate for showers (NYC 2010 CEQR Technical Manual). Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Showers | Future Climate in 2050s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 0.405 | inches / hour | This value is the average of the calculated range of future precipitation intensities excluding outliers for showers in June during the 2050s. We calculated this value using 0.4 in/hr as the current rate for showers (NYC 2010 CEQR Technical Manual). Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| * | June | Showers | Future Climate in 2080s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 0.44 | inches / hour | Midrange projections for 2080 are increased precipitation of +5 to +10% over baseline (1971-2000) amounts in Horton et al. (2009), however estimates in Horton et al. (2009) are approximately 5% less than in what a similar set of authors (Rosenzweig & Solecki 2013) estimated 4 years later for 2020 and 2050. Here we use the upper end of the Horten et al. range, and increase precipitation by 10% over baseline (1971-2000) levels. |
| June | Showers | Future Climate in 2080s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 0.316 | inches / hour | This value is the lowest outlier for future precipitation intensity for showers in June during the 2080s. We calculated this value using 0.4 in/hr as the current rate for showers (NYC 2010 CEQR Technical Manual). Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Showers | Future Climate in 2080s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 0.395 | inches / hour | This value is the average of the calculated range of future precipitation intensities excluding outliers for showers in June during the 2080s. We calculated this value using 0.4 in/hr as the current rate for showers (NYC 2010 CEQR Technical Manual). Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Showers | Future Climate in 2080s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 0.56 | inches / hour | This value is the highest outlier for future precipitation intensity for showers in June during the 2080s. We calculated this value using 0.4 in/hr as the current rate for showers (NYC 2010 CEQR Technical Manual). Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| * | June | Showers | Future Climate in 2100s | Rosenzweig et al 2015 NPCC 2015 | New York City: urban area () | 0.436 | inches / hour | Mid-range estimates are of the climate to be -1 - 19% more precipitation than in the baseline period (1971 - 2000). We increase precipitation intensity by 9% over the baseline climate scenario to simulate this change. |
| * | June | Showers | Past Climate in 1609 | Stahle et al. 1998 The lost colony and Jamestown droughts | Jamestown Colony, VA: Tidewater ecosystems (1185-1984) | 0.36 | inches / hour | Tree ring records indicate prolonged droughts in the 16th and 17th centuries at Jamestown. Assuming the same droughts affected the New York City region and climate change prior to 1971, we decrease precipitation intensities by 10% from the baseline (1971-2000) levels. |
| * | June | Soaking storm | Baseline Climate (1970-2010) | NYC DEP 2008 Climate Change Program Assessment and Action Plan | New York City: Built ecosystems (1903-1951) | 0.6 | inches / hour | Drawn from the 1903-1951 NYC intensity-duration-frequency curve for a 10 year storm lasting 12 hours with an intensity of 0.6 in/hr. |
| June | Soaking storm | Baseline Climate (1970-2010) | NYC 2010 CEQR Technical Manual | New York City: New York City (2010) | 0.128205 | inches / hour | See Matrix 1 and 2 for information about precipitation intensities for different precipitation events. Divide total volume by duration. | |
| * | June | Soaking storm | Future Climate in 2020s | Rosenzweig & Solecki 2013 Climate Risk Information 2013 | New York City: Urban ecosystems (1971 - 2050) | 0.63 | inches / hour | Mid-range estimates are of the climate to be 0 - 10% more precipitation than in the baseline period (1971 - 2000). We increase precipitation intensity by 5% over the baseline climate scenario to simulate this change. |
| June | Soaking storm | Future Climate in 2020s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 1.85 | inches / hour | This value is the lowest outlier for future precipitation intensity for a soaking storm in June during the 2020s. We calculated this value using 2.5 in/hr as the current rate for a soaking storm (NYC 2010 CEQR Technical Manual). Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Soaking storm | Future Climate in 2020s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 2.525 | inches / hour | This value is the average of the calculated range of future precipitation intensities excluding outliers for a soaking storm in June during the 2020s. We calculated this value using 2.5 in/hr as the current rate for a soaking storm (NYC 2010 CEQR Technical Manual). Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Soaking storm | Future Climate in 2020s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 2.975 | inches / hour | This value is the highest outlier for future precipitation intensity for a soaking storm in June during the 2020s. We calculated this value using 2.5 in/hr as the current rate for a soaking storm (NYC 2010 CEQR Technical Manual). Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| * | June | Soaking storm | Future Climate in 2050s | Rosenzweig & Solecki 2013 Climate Risk Information 2013 | New York City: Urban ecosystems (1971 - 2050) | 0.65 | inches / hour | Midrange projections for 2050 are increased precipitation of +5 to +10% over baseline (1971-2000) amounts. We increase the baseline intensity by 7.5%. |
| June | Soaking storm | Future Climate in 2050s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 1.93 | inches / hour | This value is the lowest outlier for future precipitation intensity for a soaking storm in June during the 2050s. We calculated this value using 2.5 in/hr as the current rate for a soaking storm (NYC 2010 CEQR Technical Manual). Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Soaking storm | Future Climate in 2050s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 2.515 | inches / hour | This value is the average of the calculated range of future precipitation intensities excluding outliers for a soaking storm in June during the 2050s. We calculated this value using 2.5 in/hr as the current rate for a soaking storm (NYC 2010 CEQR Technical Manual). Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Soaking storm | Future Climate in 2050s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 3.3 | inches / hour | This value is the highest outlier for future precipitation intensity for a soaking storm in June during the 2050s. We calculated this value using 2.5 in/hr as the current rate for a soaking storm (NYC 2010 CEQR Technical Manual). Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| * | June | Soaking storm | Future Climate in 2080s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 0.66 | inches / hour | Midrange projections for 2080 are increased precipitation of +5 to +10% over baseline (1971-2000) amounts in Horton et al. (2009), however estimates in Horton et al. (2009) are approximately 5% less than in what a similar set of authors (Rosenzweig & Solecki 2013) estimated 4 years later for 2020 and 2050. Here we use the upper end of the Horten et al. range, and increase precipitation by 10% over baseline (1971-2000) levels. |
| June | Soaking storm | Future Climate in 2080s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 3.48 | inches / hour | This value is the highest outlier for future precipitation intensity for a soaking storm in June during the 2080s. We calculated this value using 2.5 in/hr as the current rate for a soaking storm (NYC 2010 CEQR Technical Manual). Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Soaking storm | Future Climate in 2080s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 2.49 | inches / hour | This value is the average of the calculated range of future precipitation intensities excluding outliers for a soaking storm in June during the 2080s. We calculated this value using 2.5 in/hr as the current rate for a soaking storm (NYC 2010 CEQR Technical Manual). Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Soaking storm | Future Climate in 2080s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 1.97 | inches / hour | This value is the lowest outlier for future precipitation intensity for a soaking storm in June during the 2080s. We calculated this value using 2.5 in/hr as the current rate for a soaking storm (NYC 2010 CEQR Technical Manual). Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| * | June | Soaking storm | Future Climate in 2100s | Rosenzweig et al 2015 NPCC 2015 | New York City: urban area () | 0.654 | inches / hour | Mid-range estimates are of the climate to be -1 - 19% more precipitation than in the baseline period (1971 - 2000). We increase precipitation intensity by 9% over the baseline climate scenario to simulate this change. |
| * | June | Soaking storm | Past Climate in 1609 | Stahle et al. 1998 The lost colony and Jamestown droughts | Jamestown Colony, VA: Tidewater ecosystems (1185-1984) | 0.54 | inches / hour | Tree ring records indicate prolonged droughts in the 16th and 17th centuries at Jamestown. Assuming the same droughts affected the New York City region and climate change prior to 1971, we decrease precipitation intensities by 10% from the baseline (1971-2000) levels. |
| * | June | Thunderstorm | Baseline Climate (1970-2010) | NYC DEP 2008 Climate Change Program Assessment and Action Plan | New York City: Built ecosystems (1903-1951) | 1.75 | inches / hour | Drawn from the 1903-1951 NYC intensity-duration-frequency curve for a 5 year storm lasting 1 hour. This intensity is considered the "standard design criterion" for stormwater infrastructure in New York City according to NYC DEP (2008) Climate Change Program Assessment and Action Plan. |
| June | Thunderstorm | Baseline Climate (1970-2010) | Assumed | New York City: Urban Area () | 1.875 | inches / hour | We have assumed that the precipitation intensity of a thunderstorm from 1970- 2010 was 1.875 inches per hour. | |
| * | June | Thunderstorm | Future Climate in 2020s | Rosenzweig & Solecki 2013 Climate Risk Information 2013 | New York City: Urban ecosystems (1971 - 2050) | 1.84 | inches / hour | Mid-range estimates are of the climate to be 0 - 10% more precipitation than in the baseline period (1971 - 2000). We increase precipitation intensity by 5% over the baseline climate scenario to simulate this change. |
| June | Thunderstorm | Future Climate in 2020s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 1.39 | inches / hour | This value is the lowest outlier for future precipitation intensity for a thunderstorm in June during the 2020s. We calculated this value using 1.875 in/hr as the current rate for a thunderstorm. Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Thunderstorm | Future Climate in 2020s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 2.23 | inches / hour | This value is the highest outlier for future precipitation intensity for a thunderstorm in June during the 2020s. We calculated this value using 1.875 in/hr as the current rate for a thunderstorm. Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Thunderstorm | Future Climate in 2020s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 1.895 | inches / hour | This value is the average of the calculated range of future precipitation intensities excluding outliers for a thunderstorm in June during the 2020s. We calculated this value using 1.875 in/hr as the current rate for thunderstorms. Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| * | June | Thunderstorm | Future Climate in 2050s | Rosenzweig & Solecki 2013 Climate Risk Information 2013 | New York City: Urban ecosystems (1971 - 2050) | 1.88 | inches / hour | Midrange projections for 2050 are increased precipitation of +5 to +10% over baseline (1971-2000) amounts. We increase the baseline intensity by 7.5%. |
| June | Thunderstorm | Future Climate in 2050s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 1.4 | inches / hour | This value is the lowest outlier for future precipitation intensity for a soaking storm in June during the 2050s. We calculated this value using 1.875 in/hr as the current rate for a thunderstorm. Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Thunderstorm | Future Climate in 2050s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 2.27 | inches / hour | This value is the highest outlier for future precipitation intensity for a thunderstorm in June during the 2050s. We calculated this value using 1.875 in/hr as the current rate for a thunderstorm. Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Thunderstorm | Future Climate in 2050s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 1.885 | inches / hour | This value is the average of the calculated range of future precipitation intensities excluding outliers for a thunderstorm in June during the 2050s. We calculated this value using 1.875 in/hr as the current rate for thunderstorms. Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| * | June | Thunderstorm | Future Climate in 2080s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 1.93 | inches / hour | Midrange projections for 2080 are increased precipitation of +5 to +10% over baseline (1971-2000) amounts in Horton et al. (2009), however estimates in Horton et al. (2009) are approximately 5% less than in what a similar set of authors (Rosenzweig & Solecki 2013) estimated 4 years later for 2020 and 2050. Here we use the upper end of the Horten et al. range, and increase precipitation by 10% over baseline (1971-2000) levels. |
| June | Thunderstorm | Future Climate in 2080s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 1.865 | inches / hour | This value is the average of the calculated range of future precipitation intensities excluding outliers for a thunderstorm in June during the 2080s. We calculated this value using 1.875 in/hr as the current rate for thunderstorms. Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Thunderstorm | Future Climate in 2080s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 1.48 | inches / hour | This value is the lowest outlier for future precipitation intensity for a soaking storm in June during the 2080s. We calculated this value using 1.875 in/hr as the current rate for a thunderstorm. Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| June | Thunderstorm | Future Climate in 2080s | Horton et al. 2009 Climate Risk Information: New York City Panel on Climate Change | New York City: Urban landscape (1970 - 2100) | 2.6 | inches / hour | This value is the highest outlier for future precipitation intensity for a thunderstorm in June during the 2080s. We calculated this value using 1.875 in/hr as the current rate for a thunderstorm. Then we used the precipitation change (%) for the month of June found in Table 8 to calculate this value. | |
| * | June | Thunderstorm | Future Climate in 2100s | Rosenzweig et al 2015 NPCC 2015 | New York City: urban area () | 1.9075 | inches / hour | Mid-range estimates are of the climate to be -1 - 19% more precipitation than in the baseline period (1971 - 2000). We increase precipitation intensity by 9% over the baseline climate scenario to simulate this change. |
| * | June | Thunderstorm | Past Climate in 1609 | Stahle et al. 1998 The lost colony and Jamestown droughts | Jamestown Colony, VA: Tidewater ecosystems (1185-1984) | 1.575 | inches / hour | Tree ring records indicate prolonged droughts in the 16th and 17th centuries at Jamestown. Assuming the same droughts affected the New York City region and climate change prior to 1971, we decrease precipitation intensities by 10% from the baseline (1971-2000) levels. |