Day 1 Convective Outlook  
NWS Storm Prediction Center Norman OK
0101 AM CDT Mon Aug 31 2026

Valid 311200Z - 011200Z

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS THE
CENTRAL HIGH PLAINS TO GREAT LAKES AND LOWER COLORADO RIVER
VALLEY/GREAT BASIN...

...SUMMARY...
Isolated severe storms will be possible mainly later this afternoon
into tonight across the Upper Midwest/upper Great Lakes into the
central Plains, as well as across the lower Colorado River Valley
and Great Basin.

...Eastern Colorado/central High Plains to Upper Great Lakes...
A prominent shortwave trough will spread east-northeastward across
Saskatchewan and Manitoba through tonight, 
     

Day 2 Convective Outlook  
NWS Storm Prediction Center Norman OK
0104 AM CDT Mon Aug 31 2026

Valid 011200Z - 021200Z

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR PORTIONS OF
CENTRAL NEW YORK INTO CENTRAL AND EASTERN PENNSYLVANIA AND NEW
JERSEY...

...SUMMARY...
Scattered strong to severe storms are possible Tuesday over parts of
New York, Pennsylvania and New Jersey. Isolated severe storms may
also extend westward into Nebraska.

...Synopsis...
An upper ridge will prevail over the central MS Valley to the
central Appalachians while a negatively tilted upper trough
amplifies over the Interior West tomorrow (Tuesday). Multiple
mid-level 
     

Day 3 Convective Outlook  
NWS Storm Prediction Center Norman OK
0216 AM CDT Mon Aug 31 2026

Valid 021200Z - 031200Z

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR PORTIONS OF
THE EASTERN GREAT LAKES TO THE MID-ATLANTIC COASTLINE...

...SUMMARY...
Severe storms are expected across portions of the eastern Great
Lakes to the Mid-Atlantic on Wednesday. Severe wind and hail are the
main threats, though a tornado or two may also occur.

...Synopsis...
Upper ridging will persist across the central and eastern CONUS as
an upper trough progresses across the Intermountain West on
Wednesday. A pronounced mid-level