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SPC Dec 27, 2023 0830 UTC Day 3 Severe Thunderstorm Outlook

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SPC 0830Z Day 3 Outlook
Day 3 Outlook Image
Day 3 Convective Outlook  
NWS Storm Prediction Center Norman OK
0146 AM CST Wed Dec 27 2023

Valid 291200Z - 301200Z


Isolated thunderstorms are possible along parts of the
northern/central California coast on Friday.


An upper trough oriented from the Great Lakes to the Gulf of Mexico
will progress eastward toward the Atlantic coast on Friday.
Meanwhile, the western upper ridge will shift east toward the
Rockies and adjacent High Plains vicinity as an upper trough
approaches the Pacific coast late in the period. Stable conditions
and a dearth of boundary-layer moisture will preclude thunderstorm
activity for most of the CONUS. However, deep-layer southwesterly
flow ahead of the Pacific trough will support moistening midlevels
along the CA coast. Somewhat cool midlevels and modest lapse rates
will be sufficient for weak destabilization during the evening and
overnight hours. Isolated thunderstorms will be possible along parts
of the central/northern CA coastal vicinity, mainly after 00z.

..Leitman.. 12/27/2023

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