Subj : DAY3SVR: Nws Storm Prediction Center Norman Ok
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Fri Oct 20 2023 06:47:38

ACUS03 KWNS 200647
SWODY3
SPC AC 200646

Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0146 AM CDT Fri Oct 20 2023

Valid 221200Z - 231200Z

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

....SUMMARY...
Severe thunderstorms are not expected on Sunday.

....Synopsis...

An upper trough near the Pacific Northwest coast early Sunday
morning will develop south and east through the period, becoming
oriented from the northern Rockies toward central/southern CA.
Cooling aloft will result in steep midlevel lapse rates across the
northern Rockies vicinity. While boundary-layer moisture will remain
meager, increasing midlevel moisture on 30 kt southwesterly midlevel
flow will aid in weak destabilization. A few lightning flashes will
be possible across portions of central ID into southwest MT ahead of
an eastward-advancing surface cold front. Modest vertical shear,
cool surface temperatures and MUCAPE less than 200 J/kg will
preclude severe potential.

...Leitman.. 10/20/2023

$$

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