ABOUT THIS PARAMETER

precipitation intensity

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) 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 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) 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 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) 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 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) 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 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) 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 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) 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 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) 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) 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) 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) 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 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 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) 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) 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) 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) 0.48 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 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 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) 0.405 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 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 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) 0.395 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 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 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) 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 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 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) 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) 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) 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) 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 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 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.

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