SPC 1300Z Day 1 Outlook

Day 1 Convective Outlook  
NWS Storm Prediction Center Norman OK
0653 AM CST Sat Dec 26 2020

Valid 261300Z - 271200Z

...NO THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Thunderstorms are not expected through tonight in the contiguous
United States.

...Synopsis...
A low-amplitude shortwave trough will move inland this morning over
southern OR/northern CA, and over the northern Great Basin this
afternoon.  A few lightning flashes have been noted with convection
overnight near the northern CA coast and inland near Mount Shasta,
but the lightning has been rather sparse.  While additional isolated
flashes will be possible, the expected coverage of thunderstorms
both this morning across northern CA and later today across southern
ID, is too low to warrant adding an outlook area.  Otherwise, a
cold/dry continental air mass across the Gulf and Atlantic coasts
will preclude thunderstorms.

..Thompson.. 12/26/2020

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