SPC AC 221954

   Day 1 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   0154 PM CST Wed Jan 22 2025

   Valid 222000Z - 231200Z

   ...NO THUNDERSTORM AREAS FORECAST...

   ...SUMMARY...
   The risk for thunderstorms appears negligible across the U.S.
   through tonight.

   ...20z Update...
   No changes were made to the valid outlook. High pressure is
   supporting cold and dry conditions over much of the eastern and
   western US. Offshore flow over the eastern seaboard and Gulf Coast
   will preclude thunderstorm development. See the prior outlook for
   additional information.

   ..Lyons.. 01/22/2025

   .PREV DISCUSSION... /ISSUED 1026 AM CST Wed Jan 22 2025/

   ...Synopsis...
   The upper troughing currently in place across much of the CONUS is
   expected to persist throughout the day, reinforced by a shortwave
   trough forecast to move southward across the Four Corner and into NM
   and another shortwave trough that is expected to move southward
   through the northern Rockies late tonight/early tomorrow. At the
   surface, expansive and cold high pressure, currently centered over
   western PA, will gradually shift eastward, while maintain offshore
   flow along the East and Gulf Coasts. Cold high pressure is also in
   place across the western CONUS. This area of high pressure will
   likely strengthen throughout the period, potentially exceeding 1050
   mb over eastern ID tomorrow morning. Dry and stable conditions
   promoted by these features will preclude thunderstorm development.

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   NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 0100Z