837
ACUS48 KWNS 200844
SWOD48
SPC AC 200842
DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0342 AM CDT FRI MAR 20 2026
VALID 231200Z - 281200Z
..DISCUSSION
..MONDAY/DAY 4 TO WEDNESDAY/DAY 6
AN UPPER-LEVEL TROUGH IS FORECAST TO MOVE ACROSS THE EASTERN U.S. ON
MONDAY, AS A COLD FRONT ADVANCES SOUTHWARD INTO THE CAROLINAS.
THUNDERSTORM DEVELOPMENT WILL BE POSSIBLE IN PARTS OF THE CAROLINAS
MONDAY AFTERNOON. INSTABILITY IS FORECAST TO BE WEAK, BUT A MARGINAL
SEVERE THREAT COULD DEVELOP IN AREAS THAT HEAT UP THE MOST.
ON TUESDAY AND WEDNESDAY, NORTHWEST MID-LEVEL FLOW IS FORECAST OVER
MUCH OF THE EASTERN TWO-THIRDS OF NATION. THIS PATTERN WILL KEEP A
WARM AND DRY AIRMASS IN PLACE OVER THE CONTINENTAL U.S., MAKING
THUNDERSTORMS UNLIKELY IN MOST AREAS.
..THURSDAY/DAY 7 AND FRIDAY/DAY 8
MID-LEVEL FLOW IS FORECAST TO BECOME MORE WESTERLY ACROSS THE
CENTRAL AND EASTERN U.S. ON THURSDAY. IN RESPONSE, LOW-LEVEL
MOISTURE RETURN IS FORECAST FROM THE ARK-LA-TEX INTO THE MID
MISSISSIPPI VALLEY. THUNDERSTORM DEVELOPMENT WILL BE POSSIBLE FROM
THURSDAY AFTERNOON INTO THE OVERNIGHT PERIOD ACROSS THE LOWER TO MID
MISSOURI VALLEY INTO THE OHIO VALLEY, AS A MID-LEVEL JET STREAK
PASSES THROUGH THE NORTH-CENTRAL U.S. ON FRIDAY, A CONTINUED CHANCE
FOR THUNDERSTORM DEVELOPMENT WILL BE POSSIBLE FROM THE MID
MISSISSIPPI VALLEY INTO THE SOUTHERN APPALACHIANS. ALTHOUGH A SEVERE
THREAT MAY DEVELOP ON EITHER THURSDAY OR FRIDAY, LOW PREDICTABILITY
EXISTS CONCERNING ANY SPECIFIC SCENARIO.
..BROYLES.. 03/20/2026
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