Subj : DAY3SVR: Nws Storm Prediction Center Norman Ok
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Mon Oct 20 2025 07:30:16

ACUS03 KWNS 200730
SWODY3
SPC AC 200729

Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0229 AM CDT Mon Oct 20 2025

Valid 221200Z - 231200Z

....NO SEVERE THUNDERSTORM AREAS FORECAST...

....SUMMARY...
Severe storms are unlikely over the CONUS Wednesday.

....Synopsis and Discussion...
A strong and broad upper low will dominate the mid-level flow
pattern over the eastern half of the CONUS as it moves slowly from
the Great Lakes into southern Canada Wednesday. Behind it, strong
northwesterly flow aloft and weak ridging will then develop over the
central US as a surface cold front moves off the Atlantic coast. The
offshore flow should keep dry and stable conditions in place for
much of the country with the exception of south Florida and parts of
New England. Shallow moisture associated with remnant onshore flow
east of the upper low across New England could support isolated
low-topped storms Wednesday afternoon. However, buoyancy will be
very weak, and storm coverage limited, such that severe potential is
low.
To the west, a smaller southern stream upper low will move onshore
from the Pacific into the Southwest late Wednesday afternoon into
early Thursday. Cooling mid-level temperatures and weak moisture
advection from the Gulf of California could support isolated storms
over the Four Corners and southern Rockies. Though with weak
buoyancy severe potential appears very limited.

...Lyons.. 10/20/2025

$$

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