505
ACUS01 KWNS 221955
SWODY1
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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