Unseasonably cool air will sweep from the northern Plains through the Midwest and Appalachians into the weekend.
Without the massive area of high pressure parked over the central Plains, like much of the summer, the door is open for additional refreshing air masses and opportunities for rainfall on occasion through the rest of August.
While the damage has already been done from the Drought of 2012, at least the weather is giving folks in much of the Plains and Midwest a little break.
As the flow increases around an unusually strong storm for mid-August, cooler air will sweep southeastward from Minnesota to the Great Lakes and Ohio Valley. Cooler, less humid air will also be felt in parts of the South and the Appalachians over the weekend.
Temperatures are typically just coming off their highest levels of the year during mid-August. However, over a several-day stretch temperatures may seem more like early to mid-September.
Around portions of the Great Lakes, cloud cover, wind and rain will add to the coolness, making it feel downright chilly for a brief time, when compared to the many days of heat and humid from this summer.
In Chicagoland, while actual temperatures will peak in the 70s, with the wind and clouds, it may feel more like the mid-60s Friday.
Temperatures are forecast to peak only near 70 Friday in Detroit and in the lower 70s Saturday around Buffalo. In parts of the central and northern Appalachians, temperatures may fail to get out of the 60s on Saturday, while dropping well down into the 50s at night.
Autumn leaves in Vermont. Photo by Flickr user Zest-pk.
Farther south, in Nashville and Atlanta, highs in the middle 80s with lower humidity and a little breeze may feel refreshing to some people after the 90- to 105-degree temperatures during July into early August.
It is a similar story for St. Louis, which will have a highs between 80 and 85 degrees Friday and Saturday.
The cooler, less humid air will have a little trouble getting east of the Appalachians initially. It could take until early next week before folks in the I-95 zone from Raleigh to Washington, D.C., Philadelphia, New York City and Boston break out of the high humidity, shower and thunderstorm regime.
As July draws to a close, a storm system swinging up from the Deep South will bring downpours that will break the back of the heat wave in much of the northeastern United States.
Heavy downpours will raise the concern for flash flooding along the Gulf Coast and lower Mississippi Valley through midweek.
A stifling heat wave will remain entrenched across the Northeast much of this week, despite a brief reprieve in humidity for some.
Dangerous heat will surge northward and send temperatures rising across the northwestern United States this week.
Severe thunderstorms rumbled through the Northeast on Monday, lashing the region with damaging winds while also unleashing heavy downpours that triggered flash flooding.
Here are five easy ways to stay cool in sweltering summer heat.
Pollack, MD (2008)
Softball-sized hail shattered cars and windows.
Bridgetown, NJ (1803)
Tornado at 8:00 a.m. "The storm increased, and for the space of about three-quarters of an hour the lightnings were incessant and the thundering most awfully majestic." "The body of a covered wagon, taken from the wagon house, torn from from the springs, shattered and set up on end, the axel trees broken and 3 of the wheels torn from the same were found in different places at a distance of 50 feet." "One new wheel of a new heavy strong wagon broken entirely to pieces."
Hurricane near Jacksonville; $2.5 million damage in East Florida.