Communities in and around southern Illinois will become the target of severe weather through early Sunday night.
The strongest thunderstorms will be capable of producing torrential downpours, hail and damaging winds.
Downpours accompanying the thunderstorms could create hazards for motorists (reduced visibility and water ponding on roadways). Flash flooding will slow the rate at which swollen rivers are currently receding.
Areas between St. Louis, Mo., and Indianapolis south into Memphis, Tenn. will be most at risk through Sunday evening.
On Monday, showers and thunderstorms will occur along and ahead of the storm across most of the eastern third of the United States. Thunderstorms producing downpours this day will be most numerous across the eastern Ohio Valley and central Appalachians.
However, AccuWeather.com meteorologists are concerned that it will only take one drenching thunderstorm crossing parts of the I-95 corridor where Andrea shattered rainfall records on Friday to renew flooding problems.
More clouds and cooler weather can be expected across the Bay Area through the holiday weekend and into the new week.
Cloudy skies and cooler weather will linger across the Los Angeles area through the holiday weekend and early in the new week.
It might feel more like late October rather than late May in the Northeast on Friday night as temperatures dip well below normal.
Memorial Day marks the unofficial start to summer and summer warmth will dominate the Northeast next week, but that does not mean an end to shots of cooler air.
Showers and thunderstorms threaten to interfere with Memorial Day festivities across roughly two-thirds of the United States.
Another round of downpours and thunderstorms will bring a renewed threat for flooding from Kansas to Texas over the Memorial Day Weekend.
Atlantic City, NJ (1991)
Record high of 89 degrees after a record low of 38 degrees. Record lows were also set May 19,20, & 21st.
Southwestern & Central OK (1996)
Sinking air from dying thunderstorms cause unusual late night rise in temperature. Many places rose from upper 80s at 11:00PM to near 100 degrees by 3:00AM.
San Antonio, TX (1998)
Very dry since April 1st - only 0.05 of rain.