191
ACUS03 KWNS 010721
SWODY3
SPC AC 010720
DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0120 AM CST WED JAN 01 2025
VALID 031200Z - 041200Z
..NO THUNDERSTORM AREAS FORECAST
..SUMMARY
THUNDERSTORMS ARE NOT EXPECTED ON FRIDAY.
..SYNOPSIS AND DISCUSSION
THE UPPER PATTERN EARLY FRIDAY MORNING WILL LIKELY BE CHARACTERIZED
BY WESTERN CONUS RIDGING AND CENTRAL/EASTERN CONUS TROUGHING. A PAIR
OF PHASED SHORTWAVE TROUGHS ARE FORECAST TO MOVE THROUGH THE EASTERN
CONUS TROUGHING AND OFF THE MID-ATLANTIC COAST. MID-LEVEL FLOW WILL
STRENGTHEN IN THE WAKE OF THESE WAVES, COINCIDENT WITH ANOTHER
SHORTWAVE TROUGH DROPPING FROM THE NORTHERN PLAINS INTO THE MID MS
VALLEY.
THE WESTERN CONUS RIDGING WILL CONTINUE GRADUALLY SHIFTING EASTWARD,
AHEAD OF A PROGRESSIVE SHORTWAVE TROUGH FORECAST TO MOVE INTO THE
PACIFIC NORTHWEST. BY EARLY SATURDAY, THE UPPER RIDGING IS EXPECTED
TO EXTEND ACROSS THE ENTIRE HIGH PLAINS AND INTO ALBERTA AND
SASKATCHEWAN, WITH THE SHORTWAVE TROUGH EXTENDING FROM NORTHWEST
WA/SOUTHWEST BRITISH COLUMBIA THROUGH THE WESTERN GREAT BASIN.
AT THE SURFACE, A COLD AND DRY AIRMASS IS EXPECTED TO REMAIN IN
PLACE EAST OF THE ROCKIES, WITH ASSOCIATED HIGH PRESSURE
CONTRIBUTING TO MOSTLY OFFSHORE LOW-LEVEL FLOW. THE ONLY EXCEPTION
IS ACROSS THE TX COAST, WHERE SOME MORE EASTERLY FLOW MAY EXIST
ALONG THE NORTHERN PERIPHERY OF A LOW OVER THE WESTERN GULF. SOME
LOWER 60S DEWPOINTS MAY ADVECT INTO SOUTH TX, BUT WARM MID-LEVEL
TEMPERATURES SHOULD STILL PRECLUDE DEEP CONVECTION AND ANY
LIGHTNING.
..MOSIER.. 01/01/2025
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