772
ACUS02 KWNS 181724
SWODY2
SPC AC 181723
DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1223 PM CDT SAT APR 18 2026
VALID 191200Z - 201200Z
..NO SEVERE THUNDERSTORM AREAS FORECAST
..SUMMARY
SEVERE THUNDERSTORMS ARE NOT EXPECTED ON SUNDAY.
..DISCUSSION
AN AMPLIFIED MIDLEVEL TROUGH WILL MOVE EASTWARD FROM THE GREAT LAKES
INTO THE NORTHEAST ON SUNDAY, WHILE A RELATED COLD FRONT MOVES OFF
THE EASTERN SEABOARD AND THE FL PENINSULA. PRECEDING THE TROUGH,
LARGE-SCALE ASCENT WILL SUPPORT ISOLATED/ELEVATED THUNDERSTORMS
ACROSS COASTAL NEW ENGLAND INTO THE AFTERNOON. SIMILARLY, A COUPLE
THUNDERSTORMS ARE POSSIBLE AHEAD OF THE FRONT OVER COASTAL NC AND
FARTHER SOUTH OVER THE CENTRAL/SOUTHERN FL PENINSULA (AIDED BY AN
ATLANTIC SEA BREEZE), THOUGH MUCH OF THIS ACTIVITY MAY DEVELOP
OFFSHORE. FARTHER WEST OVER THE LOWER GREAT LAKES, LAPSE RATES WILL
QUICKLY STEEPEN BENEATH THE CORE OF THE MIDLEVEL TROUGH, AND
SUFFICIENT (ALBEIT WEAK) BUOYANCY WILL SUPPORT A COUPLE
THUNDERSTORMS -- GIVEN INCREASING ASCENT IN THE LEFT-EXIT REGION OF
A MIDLEVEL JET.
FINALLY, ISOLATED/ELEVATED THUNDERSTORMS WILL BE POSSIBLE WITHIN A
POST-FRONTAL AIR MASS ACROSS SOUTHWEST TX, WHERE WEAK WARM-AIR
ADVECTION WILL DEVELOP AMID MODESTLY STEEP MIDLEVEL LAPSE RATES.
..WEINMAN.. 04/18/2026
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