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SPC Dec 20, 2023 1730 UTC Day 2 Convective Outlook

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SPC 1730Z Day 2 Outlook
Day 2 Outlook Image
Day 2 Convective Outlook  
NWS Storm Prediction Center Norman OK
1100 AM CST Wed Dec 20 2023

Valid 211200Z - 221200Z


Isolated thunderstorms should occur Thursday across parts of
central/southern California and southern Arizona. Severe
thunderstorms are not expected.

...Synopsis and Discussion...
An upper low should be centered well off the coast of southern CA
early Thursday morning. This low is expected to drift gradually
southward through the day, before moving more eastward towards the
coast overnight and into Friday morning. Large-scale ascent, ample
mid-level moisture, and cold mid-level temperatures associated with
this upper low should encourage isolated thunderstorms along and
near the central/southern CA coast through the period. As the low
moves gradually eastward, showers and occasional thunderstorms are
forecast to expand eastward across southern Arizona through early
Friday morning. Weak instability should preclude a meaningful threat
for severe thunderstorms across these areas.

..Gleason.. 12/20/2023

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