Subj : DAY2SVR: Nws Storm Prediction Center Norman Ok
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Wed Sep 27 2023 05:50:55

ACUS02 KWNS 270550
SWODY2
SPC AC 270549

Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1249 AM CDT Wed Sep 27 2023

Valid 281200Z - 291200Z

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

....SUMMARY...
Severe thunderstorms appear unlikely on Thursday.

....Synopsis...
A progressive leading shortwave trough will move from northeast MT
across southern SK and MB, as another upper low moves southeast out
of BC. This region will remain beneath a broad area of cyclonic flow
and cool temperatures aloft, with high pressure over WA, OR, ID and
MT.

While the surface trough over the Dakotas will weaken as the main
wave lifts north, a secondary area of low pressure will remain over
the central High Plains. Only meager levels of moisture will
interact with this low and a front pushing into southeast NE and
northeast CO, with minimal thunderstorm chances despite weak
instability.

Elsewhere, a pocket of instability will remain from southern MO into
parts of KY and TN, near a weakly convergent boundary. While
relatively cool 500 mb temperatures on the order of -10 to -12 C
will remain beneath a weak upper trough, shear will be negligible
and will not favor much of a severe threat, although small hail may
occur with isolated, briefly strong storms. Early day remnant cloud
debris and outflows may hamper destabilization for much diurnal
activity.

...Jewell.. 09/27/2023

$$

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