556
ACUS48 KWNS 170614
SWOD48
SPC AC 170612
DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0112 AM CDT TUE MAR 17 2026
VALID 201200Z - 251200Z
..DISCUSSION
AN UPPER RIDGE WILL HOLD OVER THE SOUTHWEST FROM FRI/D4 INTO SAT/D5,
BUT WILL BEGIN TO FLATTEN AS A PROGRESSIVE, LOW-AMPLITUDE WAVE MOVES
INTO THE FAR NORTHERN ROCKIES AND PLAINS. THIS FEATURE IS THEN
FORECAST TO AMPLIFY ACROSS THE GREAT LAKES AND NORTHEAST DURING THE
SUN/D6 TO TUE/D8 PERIOD, WHILE AN UPPER RIDGE POSSIBLY RE-BUILDS
OVER THE SOUTHWEST. HOWEVER, PREDICTABILITY BECOMES LOW FOR THAT
PATTERN CHANGE.
IN ASSOCIATION WITH THE NORTHERN WAVE, LOW PRESSURE WITH A TRAILING
COLD FRONT MAY DEVELOP FROM THE PLAINS TO THE MID ATLANTIC FROM
SUN/D6 INTO MON/D7. GIVEN THE ANTECEDENT DRY CONDITIONS, ONLY
MARGINAL MOISTURE RETURN AND DESTABILIZATION ARE EXPECTED. WHILE
THIS MAY SUPPORT SCATTERED THUNDERSTORMS ACROSS THE OHIO VALLEY
REGION ON SUNDAY/D6, SUBSTANTIAL SEVERE WEATHER IS NOT ANTICIPATED.
BEHIND THAT SYSTEM, A REINFORCING HIGH WILL LIKELY SPREAD SOUTH
ACROSS THE PLAINS AND MUCH OF THE EAST, RESULTING IN STABLE
CONDITIONS.
..JEWELL.. 03/17/2026
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