845
ACUS48 KWNS 130734
SWOD48
SPC AC 130732

Day 4-8 Convective Outlook
NWS Storm Prediction Center Norman OK
0232 AM CDT Sun Jul 13 2025

Valid 161200Z - 211200Z

...DISCUSSION...
Generally low-amplitude westerly flow will persist across the
northern tier of the CONUS during the Day 4-8 period. A couple of
shortwave impulses will migrate through westerly flow from the Upper
Midwest to the Great Lakes vicinity on Days 4-5/Wed-Thu and again
during the weekend. These features could support some severe
thunderstorm potential for parts of the Midwest/Great Lakes
vicinity, particularly on Days 4-5/Wed-Thu as a sagging cold front
stalls over the Great Lakes. However, prior convection and large
spread among various medium range guidance regarding timing and
location of these somewhat subtle features precludes severe
probabilities at this time.

Strong upper ridging will develop across the south-central and
southeast U.S. beginning around Day 6/Fri. Weak deep-layer flow
beneath the upper ridge and lack of large-scale forcing will limit
severe potential from the southern Plains into the Southeast.

..Leitman.. 07/13/2025