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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