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000
ACUS11 KWNS 042013
SWOMCD
SPC MCD 042012
ARZ000-OKZ000-TXZ000-050015-

MESOSCALE DISCUSSION 0115
NWS STORM PREDICTION CENTER NORMAN OK
0212 PM CST WED MAR 04 2015

AREAS AFFECTED...SOUTHEAST OK...W-CENTRAL AR...NORTH TX

CONCERNING...WINTER MIXED PRECIPITATION

VALID 042012Z - 050015Z

SUMMARY...SLEET AND LIGHT FREEZING RAIN WILL CONTINUE TO DEVELOP
SOUTHEAST INTO PORTIONS OF WEST-CENTRAL AR...SOUTHEAST OK AND NORTH
TEXAS INTO THE LATE AFTERNOON AND EVENING. SLEET WILL BE THE MAIN
PRECIPITATION TYPE WITH AN EVENTUAL TRANSITION TO SNOW EXPECTED
LATER TONIGHT.

DISCUSSION...MIXED WINTER PRECIPITATION WAS MOVING INTO PORTIONS OF
S-CENTRAL OK AND NORTH TX NEAR THE RED RIVER WHERE TEMPERATURES WERE
IN THE 29-32 DEG F RANGE. AS PRECIPITATION CONTINUES...AND THE
MODIFIED ARCTIC AIRMASS CONTINUE TO SLOWLY PROGRESS SOUTHWARD...RAIN
WILL EVENTUALLY CHANGE TO SLEET AND SOME LIGHT FREEZING RAIN ACROSS
PORTIONS OF NORTH TEXAS INTO W-CENTRAL AR. HERE...WET-BULB
TEMPERATURES WERE IN THE 32-35 DEGREE F RANGE AND WILL CONTINUE TO
FALL WITH THE SOUTHWARD PROGRESSION OF THE LOW LEVEL COLD AIR. WEAK
WARM ADVECTION LEADING TO ISENTROPIC UPGLIDE AHEAD OF THE UPPER
SHORTWAVE IMPULSE AND A BAND OF 850-700 MB FRONTOGENESIS SHOULD
ALLOW FOR REGENERATION OF PRECIPITATION. SEVERAL ROUNDS OF LIGHT
WINTRY PRECIPITATION ARE EXPECTED THROUGH THE EVENING HOURS WITH AN
EVENTUAL CHANGE OVER TO SNOW DURING THE NIGHTTIME HOURS.

..LEITMAN.. 03/04/2015

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...LZK...SHV...TSA...FWD...OUN...

LAT...LON   35599367 35689399 35609460 34869663 34019838 33629871
            33279864 32929814 33009720 33189654 33509568 34149491
            34789402 35189353 35369350 35599367

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