A major shift in the weather pattern will drive a blast of cool air southeastward from Canada across the Plains, Midwest, East and South into the weekend.
The blast of air from the Canada Prairies will drive temperatures and humidity levels down all the way to Texas and eventually much of the Atlantic Seaboard.
Temperatures may struggle to top 70 around Chicago both days of the weekend.
As the cooler air blasts across the warm waters of the Great Lakes, waterspouts are likely to spin up this weekend.
In Texas, the 100-degree heat from much of this summer will be replaced by highs in the 80s with much lower humidity in such cities as Dallas, San Angelo and Houston.
In the central and northern Appalachians, in the wake of the front which marks the leading edge of cooler air, the coolest spots could have highs near 60 on Sunday.
In the Deep South, for the folks who have been enduring tropical heat and humidity this week while cleaning up after Isaac, highs in the 80s with low humidity and sunshine will settle in later this weekend into next week.
While the magnitude of cooling will be less pronounced in much of the East's I-95 corridor, humidity levels will be shaved substantially and highs will be in the 70s by early next week from Boston to New York City and Washington, D.C.
The blast of cooler air and refreshing humidity will be preceded by rounds of showers and thunderstorms, which can lead to flash flooding and localized severe weather.
The downpours and severe weather will hit portions of the Midwest Friday then the Deep South and Atlantic coast into the weekend.
In addition, folks in portions of Florida may have to deal with a weak tropical system, such as a tropical depression or tropical storm and its torrential downpours this weekend. The feature could come about of a cluster of thunderstorms over the northern Gulf of Mexico, which are part of the old remains of Isaac.
As cooler air drives into the eastern U.S. this weekend, a compensating northerly flow over the Atlantic Ocean may help drive Hurricane Leslie into Atlantic Canada early next week.
A disturbance will swing across the Midwest and fire a round of severe thunderstorms to end the weekend.
The stream of moisture into the Southwest is drying out some, so this weekend may not be as wet as the previous few days.
The air felt like an exceptional 163 F in Bandar Mahshahr, Iran, on Friday and similar or worse conditions will follow.
Drenching thunderstorms bring little-to-no relief to drought-stricken areas of the Sunshine State.
With no exact details on where Malaysia Airlines Flight 370 went missing, Indian Ocean currents may have swept one piece of the complicated puzzle to shores on Reunion Island.
In the most destructive hurricane season in recorded history, images from Katrina, Rita, Wilma and others still resonate today and immediately bring to mind the total despair millions of Americans faced in 2005.
A total of 5.31" of rain.
New England (1975)
"Hot Saturday" 107 degrees in New Bedford and Chester, MA All-time hottest day - 104 degrees in Providence, RI (also all-time record for state) 100 degrees in Nantucket for the first time
Heat wave continues for the following: Abilene - 41 consecutive days of 98 degrees or higher, tied 1952 record. Dallas/Ft. Worth - 41st consecutive day of 100 degrees + El Paso - 51st consecutive day of 100 degrees +