As millions of people hit the road and the skies to head back home after their Labor Day or summer ventures Monday evening, locally drenching storms could cause travel delays.
The storms will be hit-or-miss, but a few locations have the potential to be hit hard by blinding downpours, flash and urban flooding and sporadic power outages from gusty winds.
There is the potential of storms on a more regional basis Monday evening, when compared the weekend.
Boston and Providence, R.I., were hit by urban flooding Sunday morning. Parts of Philadelphia were hit with a torrential downpour Monday.
Early Monday evening, portions of New York near Oswego had penny-sized hail and thunderstorm wind gusts up to 60mph.
Storms through Monday night could affect multiple major metropolitan areas including Boston, Hartford, Conn., New York City, Philadelphia, Pittsburgh, Buffalo, Nashville, Atlanta, Raleigh, Baltimore, Washington, D.C., and Charleston, W.Va.
An approaching cool front will attempt to squeeze the humidity out of the atmosphere by lifting it into a couple of lines and several clusters of strong thunderstorms through Monday night.
The remnants of these storms will last into Tuesday along the immediate Atlantic Seaboard, so that additional delays and disruptions are possible for those still at the beaches or commuting back to work or school.
However, a push of cooler and less humid air will filter from northwest to southeast across much of the Eastern states during the middle of the week, diminishing the risk of showers and thunderstorms.
A push of cooler air will slash summerlike conditions across the Upper Midwest then in the Northeast beginning this weekend.
Flood-ravaged Texas and Oklahoma are in line for one more round of drenching showers and thunderstorms Friday and Saturday.
Daytime temperatures will fall into the upper 50s by Sunday before rebounding again on Monday.
Weekend temperatures will be more like the end of April than the end of May.
Summer-like warmth will continue through the rest of the week in the East, but there will still be a few thunderstorms around.
A very active typhoon season combined with drought in much of India could have a significant impact on lives and property for more than a billion people in Asia during the summer of 2015.
Chicago, IL (1992)
33 degrees on this date. Coldest for so late in the spring season.
Bracketville, TX (1880)
Twenty people drowned in a cloud burst -- 12.43" of rain.
Snowstorm; up to 10".