DAY 3 CONVECTIVE OUTLOOK NWS STORM PREDICTION CENTER NORMAN OK 0220 AM CDT SUN JUL 26 2015 VALID 281200Z - 291200Z ...THERE IS A MRGL RISK OF SVR TSTMS OVER MUCH OF THE UPPER MIDWEST... ...SUMMARY... ISOLATED SEVERE THUNDERSTORMS WILL BE POSSIBLE TUESDAY OVER PORTIONS OF THE UPPER MIDWEST. ...SYNOPSIS... AN UPPER LEVEL LOW PRESSURE SYSTEM WILL MOVE EAST ALONG THE U.S.-CANADIAN BORDER TUESDAY...WITH AN ELONGATED UPPER-LEVEL HIGH OVER MUCH OF THE SOUTHERN HALF OF THE CONUS. A COLD FRONT WILL MOVE FROM THE NORTHERN PLAINS ACROSS MUCH OF THE UPPER MIDWEST...EXTENDING FROM CENTRAL MINNESOTA SOUTHWEST INTO THE OKLAHOMA PANHANDLE TUESDAY EVENING. ...UPPER MIDWEST... THUNDERSTORMS WILL LIKELY BE IN PROGRESS ACROSS PORTIONS OF THE UPPER MIDWEST TUESDAY MORNING AIDED BY A STRONG NOCTURNAL LOW-LEVEL JET/WARM ADVECTION. DESPITE EARLY CLOUD COVER...THE PRESENCE OF A RESIDUAL ELEVATED MIXED LAYER AND DIURNAL HEATING OF A VERY MOIST AIR MASS /LOWER 70S SURFACE DEW POINTS/ SHOULD RESULT IN SUBSTANTIAL DESTABILIZATION BY LATE AFTERNOON. STRONGER FLOW ALOFT WILL REMAIN WEST OF THE COLD FRONT UNTIL TUESDAY EVENING...WHEN HEIGHT FALLS/FORCING FOR ASCENT SHOULD INCREASE ACROSS THE AREA. THUNDERSTORMS DEVELOPING NEAR THE FRONT...AND POSSIBLY REINTENSIFICATION OF ONGOING STORMS...DURING THE AFTERNOON/EVENING WILL POSE A RISK OF AT LEAST ISOLATED DAMAGING WINDS AND LARGE HAIL. HIGHER SEVERE PROBABILITIES MAY EVENTUALLY BE WARRANTED AS THE EFFECTS OF EARLY DAY STORMS/MESOSCALE DETAILS BECOME CLEARER. ..BUNTING.. 07/26/2015
from SPC Convective Outlooks http://1.usa.gov/1CYpnJx
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