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Discussion through Thursday

By: NWS
By: NWS

ZONAL PATTERN IN THE MID LEVELS TONIGHT WILL BECOME SWLY TUESDAY THROUGH WEDNESDAY AS THE WRN CONUS TROUGH EMERGES FROM THE PLAINS INTO THE ERN CONUS. ADDITIONAL SHORT WAVE ENERGY WILL DIVE SEWD FROM CANADA TO AMPLIFY THE MEAN TROUGH OVER THE ERN 2/3 OF THE NATION WEDNESDAY NIGHT. AT THE SURFACE...WEAK NE-SW ORIENTED TROUGH BISECTING THE CWA WASHES OUT TONIGHT. HOWEVER...RESIDUAL LOW LEVEL MOISTURE COMBINED WITH LIGHT WINDS WILL ONCE AGAIN PROMOTE AREAS OF FOG...LOCALLY DENSE AT TIMES...LATER THIS EVENING AND PERSISTING THROUGH EARLY TUESDAY MORNING. SURFACE RIDGE WILL BE THE DOMINANT FEATURE FOR TUESDAY AND TUESDAY NIGHT...WITH ABOVE NORMAL TEMPS. THE PRESSURE GRADIENT TIGHTENS TUESDAY NIGHT AND WEDNESDAY AHEAD OF THE NEXT COLD FRONT. THE 12Z GFS MAINTAINS ITS FASTER FRONTAL PACE COMPARED TO THE NAM. POPS WILL INCREASE ON WEDNESDAY WITH LIKELY NE TO CHANCE SE. EXPECT SHOWERS WITH POTENTIAL FOR ISOLATED TSTMS IN THE AFTERNOON/EARLY EVENING. KEPT CHANCE POPS FOR SHOWERS WEDNESDAY NIGHT AS THE FRONT MOVES ACROSS THE CWA. COOLER AIR SPILLS INTO REGION BEHIND THE FRONT WITH A SHARP TEMP GRADIENT FROM NW TO SE.


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