429 

AWUS83 KBIS 200952

RWSBIS

NDZ001>005-009-010-012-013-017>020-022-023-025-031>033-035>037-

040>044-046>048-050-051-055>062-201800-



Regional Weather Forecast

National Weather Service Bismarck ND

452 AM CDT Wed May 20 2026 /352 AM MDT Wed May 20 2026/



After another chilly morning with temperatures near to below

freezing across the eastern half of the region, a warm up closer

to normal is forecast for today, with highs in the 60s and 70s. It

will also be windy across the Dakotas today. Scattered showers and

thunderstorms are forecast to develop in eastern Montana this

afternoon, spreading into western and central North Dakota through

this evening.



High temperatures will mostly remain in the 60s Thursday and

Friday as western and southern parts of the region see high

chances for showers and occasional thunderstorms. Another warm up

is then expected through the holiday weekend, with highs reaching

well into the 80s on Memorial Day.



$$






628 

AWUS81 KCTP 200959

RWSCTP

PAZ004>006-010>012-017>019-024>028-033>037-041-042-045-046-

049>053-056>059-063>066-210000-



Regional Weather Summary

National Weather Service State College PA

559 AM EDT Wed May 20 2026



A cold front moving southeast from Lake Erie will trigger

scattered showers and a few strong thunderstorms today across the

Keystone state. An isolated severe thunderstorm is possible in the

southern part of the Commonwealth.  



The early season heat wave will break down today with high 

temperatures ranging from 60 degrees in Erie to 95 degrees in the

Philadelphia metro area. 



Showers are likely to persist through late tonight across 

southern Pennsylvania near the Maryland border. Low temperatures 

will be 10 to 20 degrees cooler than last night ranging from 40 

degrees in the northwest Allegheny Mountains to the upper 50s in 

the Delaware Valley.



Unseasonably cool and wet conditions are forecast heading into 

Memorial Day weekend with periods of soaking rain Friday through 

Saturday. The rainfall over an extended duration will be largely

beneficial especially for the moderate to severe drought areas in 

the southern and southeastern portions of Pennsylvania. Occasional

to scattered rain showers and gradually warmer temperatures are 

forecast Sunday and Monday followed by mainly dry weather Tuesday

into next Wednesday. 



$$



MRS