May 2004 Pennsylvania Weather Summary

May 1^st- May 8^th

May 1^st kicked off the month of wet weather with light rain falling across the state preceding an approaching cold front. This rain stuck around through the passing of the front on the 4^th, with the heaviest rainfall amounts recorded on the 3^rd. Cooler temperatures that were brought in by a high-pressure system on the 5^th were raised into the 60’s and 70’s on the 7^th. Some light rain fell late on the 7^th and into the 8^th, as a cold front moved through the region.

May 9^th- May 16^th

The passing of the previous cold front brought cooler temperatures into the region on the 9^th and also dropped rain in northern Pennsylvania. Convective activity occurred in southeastern PA on the 10^th. A large low-pressure system to the north allowed more rain to fall in northern Pennsylvania on the 11^th. The warm sector created by the large pressure system brought temperatures in the high 80’s for much of the state until rain was dropped on the 15^th and 16^th, as the cold front finally passed through.

May 18^th- May 23^rd

The rainy month continued with wet weather in western Pennsylvania on the 18^th and rain across much of the state on the 19^th preceding a cold front. The southwest saw heavy rain on the 21^st (Pittsburgh had about 1.5”) and some impressive thunderstorms passed through the western and central regions of Pennsylvania. Rain fell in northern Pennsylvania again on the 22^nd and into the 23^rd, while the Philadelphia area saw temperatures reach into the 90’s on the 23^rd.

May 24^th- May 31^st

The remaining days of May saw more rain in Northern PA on the 24^th. More impressive, however, were the powerful thunderstorms seen on the 26^th. Rain and thunderstorms occurred in the central counties and even dropped some hail as well. To conclude the significant weather events for the month, some light rain fell over the state on the 27^th as a cold front passed through. Temperatures remained in the 70’s for the rest of the month.

Extremes:

		Town(s)	Date(s)
Max High Temp	96	Greenlane Res.	24
(Daily)
Min Low Temp	22	Kane	4
(Daily)		Kane	5
Max Rainfall	11.24	Bradford Fire Stat.
(Monthly)
Min Rainfall	2.02	West Conshohoken Gas Plant
(Monthly)

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