Weather Underground Forecast for Friday, June 01, 2012.
Thunderstorm activity is anticipated across the Eastern Seaboard on Friday, as a low pressure system and associated cold front move eastward over the Eastern Valleys and towards the East Coast. This system will produce scattered showers and thunderstorms from the Lower Great Lakes through the Mid-Atlantic states, and across the Gulf states. As the system pulls moisture in from the Atlantic Ocean, heaviest rainfall is anticipated across the Northeast and Upper Ohio River Valley. However, warm and humid conditions of the Southeast will allow for severe thunderstorm development. There is a slight risk of severe thunderstorm development from the Pennsylvania through the Carolinas. Expect strong winds, large hail, and possibly a few tornadoes to develop in these areas. Rainfall totals will range from 1 to 2 inches, with over 2 inches possible in areas of severe weather development.
Behind this system in the Plains, expect significantly cooler temperatures after the passage of the strong cold front. Temperatures will be 15 to 20 degrees below seasonable from the Central Plains through parts of the Midwest and Great Lakes.
In the West, a cold front over the Pacific Northwest continues pushing moisture onshore. This will produce more widespread scattered showers across Oregon and Washington, but heavy rainfall and thunderstorms are not likely. Meanwhile, mild moisture and warm temperatures over the Central and Northern Rockies will support afternoon and evening showers and thunderstorms. Severe weather development is not likely in these areas. Temperatures in the Lower 48 states Thursday have ranged from a morning low of 26 degrees at Silver Bay, Minn. to a high of 102 degrees at El Centro, Calif.