Early fall chill descends on millions across US as unseasonable cold takes hold of Upper Midwest
On Thursday, Milwaukee and Minneapolis will struggle to crack 60 degrees. Chicago and Detroit will be in the mid-60s on Friday. More than 140 million Americans will see below-average temperatures by the weekend.
Major fall-like cooldown for areas east of the Rockies
A big cooldown is underway for millions of Americans east of the Rockies. To end the workweek, some in the Great Lakes won't even make it to 60 degrees.
MILWAUKEE – An intense dip in the polar jet stream will swing through the northern part of the country through the end of the workweek, allowing cool air and fall-like temperatures from Canada to enter the Upper Midwest.
This air will spread a true fall feel to the northern Plains and much of the central U.S. as the week progresses, with temperatures more reminiscent of mid-October than the start of September.
A cold front associated with that dip in the jet stream will also bring severe storms across the central Plains and Midwest, with temperatures dropping into the 50s and 60s across much of the region.
WHY FALL SHOULD ACTUALLY BEGIN ON SEPTEMBER 1
(FOX Weather)
While meteorological fall began on Sept. 1, astronomical fall doesn't begin until Sept. 22 this year. Climatologically, summerlike conditions tend to linger through the beginning of September across the vast majority of the Lower 48.
The chilly air will peak in intensity on Thursday and Friday, with more than 140 million Americans feeling below-average temperatures by the weekend.
(FOX Weather)
According to the FOX Forecast Center, some places could see their daytime high temperatures holding in the 40s across the Upper Midwest and the higher elevations of the Appalachians, with 50s and 60s in the central Plains and Ohio Valley.
For Thursday, Milwaukee and Minneapolis will struggle to crack 60 degrees. Chicago and Detroit will be in the mid-60s on Friday.
Dozens of places could set record-cold highs on Thursday and Friday afternoon.
(FOX Weather)
Temperatures may start to rebound by next week as the jet stream could finally start breaking down, allowing high pressure to build over the East, bringing back summer-like conditions.
BRYAN NORCROSS: SLOW-MOVING DISTURBANCE TO WATCH IN EASTERN ATLANTIC
As for other signs of the approaching fall season, leaves have just started to change color at high elevations. In the Lower 48, northern New England, the Upper Midwest and the Rockies are typically the first to show leaves turning bright red, orange and yellow, with peak color arriving in early October.
As fall begins, the days get shorter as we gradually lose daylight.
The most noticeable loss of daylight happens in the weeks right after the autumnal equinox around Sept. 22–23. Places from Washington to northern Minnesota lose as much as 100 minutes throughout September.