September Review By: Samantha Borisoff, Climatologist

September Temperatures !  From less than 50%

of normal to more than 150%

!  Wettest areas: !  Pars of Maine !  Southern DE/

eastern MD !  Cape Cod !  Western NY

!  Driest areas: !  Western PA !  Parts of WV !  DC area !  Parts of NY & NJ !  Parts of New

England

!  8 sites ranked this Aug so far among their top 10 driest

From 2°F above normal to more than 6°F above normal Top 10 warmest for 31 of 35 major climate sites (record at Dulles)

September Temperatures !  ????

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26 sites with an above average number of days with a high of

at least 90°F this July

Both high and low temperatures have been above normal

September Precipitation !  From less than 50% of

normal to more than 150%

!  Wettest areas: !  Parts of Maine !  Southern DE/eastern MD !  Cape Cod !  Western NY

!  Driest areas: !  Western PA !  Parts of WV !  DC area !  Parts of NY & NJ !  Parts of New England

!  8 sites ranked this Aug so far among their top 10 driest

From less than 25% of normal to 150% of normal Top 10 driest for 5 major climate sites (3 in WV)

Drought Monitor !  From less than 50%

of normal to more than 150%

!  Wettest areas: !  Parts of Maine !  Southern DE/

eastern MD !  Cape Cod !  Western NY

!  Driest areas: !  Western PA !  Parts of WV !  DC area !  Parts of NY & NJ !  Parts of New

England

!  8 sites ranked this Aug so far among their top 10 driest

Early September:

27% of the region in moderate, severe, or extreme drought

First time in extreme drought for

some counties since at least 2000 (start of Drought Monitor data)

65% of the region in either D0 or D1: 53% of region abnormally dry

12% in moderate drought

September 29

Late September:

40% of the region in moderate, severe, or extreme drought

September 1

Current Rain Event !  From less than 50%

of normal to more than 150%

!  Wettest areas: !  Parts of Maine !  Southern DE/

eastern MD !  Cape Cod !  Western NY

!  Driest areas: !  Western PA !  Parts of WV !  DC area !  Parts of NY & NJ !  Parts of New

England

!  8 sites ranked this Aug so far among their top 10 driest

Today – this weekend:

Heavy rain & flooding in

some areas, worst drought

areas generally see ½” to 2.5”

24-hour rainfall totals ending 7am September 29

September 22

Late September:

37% of the region in moderate, severe, or extreme drought

September 1

Outlooks !  From less than 50%

of normal to more than 150%

!  Wettest areas: !  Parts of Maine !  Southern DE/

eastern MD !  Cape Cod !  Western NY

!  Driest areas: !  Western PA !  Parts of WV !  DC area !  Parts of NY & NJ !  Parts of New

England

!  8 sites ranked this Aug so far among their top 10 driest

Today – this weekend: Heavy rain & flooding in some areas worst drought areas generally see

½” to 2.5”

65% of the region in either D0 or D1: 53% of region abnormally dry

12% in moderate drought

September 22

Late September:

37% of the region in moderate, severe, or extreme drought

September 1

Early October: above-normal temps

possible impacts from TS Matthew?

Contact Information !  sgh58@cornell.edu or nrcc@cornell.edu

!  607-255-1751

Upcoming Webinars !  Thursday, October 27 at 9:30 am

!  Tuesday, November 29 at 9:30 am

!  Tuesday, December 20 at 9:30 am

www.nrcc.cornell.edu