Mesoscale Discussion 113

Issued

Mar 4, 2015, 10:00 AM CST (16:00 UTC)

Expired

Mar 4, 2015, 3:00 PM CST

In force

5 hr

Issued by

the Storm Prediction Center

The Altus AFB radar (KFDR), 83 km from the middle of the area, began a volume at 16:01 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

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579 
ACUS11 KWNS 041600
SWOMCD
SPC MCD 041600 
OKZ000-TXZ000-042100-

MESOSCALE DISCUSSION 0113
NWS STORM PREDICTION CENTER NORMAN OK
1000 AM CST WED MAR 04 2015

AREAS AFFECTED...CENTRAL AND SOUTHWEST OKLAHOMA INTO PORTIONS OF THE
TEXAS PANHANDLE AND WESTERN NORTH TEXAS

CONCERNING...WINTER MIXED PRECIPITATION 

VALID 041600Z - 042100Z

SUMMARY...MIXED WINTER PRECIPITATION WILL SPREAD EAST/NORTHEAST
ACROSS THE TEXAS PANHANDLE INTO SOUTHWEST AND CENTRAL OKLAHOMA OVER
THE NEXT SEVERAL HOURS. A BRIEF PERIOD OF FREEZING RAIN WILL BE
POSSIBLE BEFORE TRANSITIONING TO SLEET FOR MOST OF THE DAY.
EVENTUALLY...A TRANSITION TO SNOW IS EXPECTED...BUT NOT UNTIL LATE
AFTERNOON/EARLY EVENING. PRECIPITATION RATES SHOULD GENERALLY REMAIN
LIGHT...BUT MAY LEAD TO TRAVEL PROBLEMS.

DISCUSSION...MIXED WINTER PRECIPITATION WAS DEVELOPING IN WEAK WARM
AIR ADVECTION OVER A SOUTHWARD PROGRESSING COLD FRONT AND BAND OF
850 MB FRONTOGENESIS. THIS BAND OF PRECIPITATION STRETCHED FROM THE
TX PANHANDLE/SOUTH PLAINS NORTH/NORTHEAST TOWARD CENTRAL AND
NORTH-CENTRAL OK. SURFACE OBSERVATIONS SHOWED A MIXED BAG OF
PRECIPITATION TYPES INCLUDING SNOW...SLEET AND FREEZING RAIN. COLDER
AIR WILL CONTINUE TO OOZE SOUTHWARD THROUGH THE DAY AND ANY PERIOD
OF FREEZING RAIN SHOULD BE BRIEF AS VERTICAL TEMPERATURE PROFILES
COOL AND THE BOUNDARY LAYER SUB-FREEZING DEPTH INCREASES. AS
SUCH...A FAIRLY QUICK TRANSITION TO SLEET IS EXPECTED...BEFORE
FINALLY CHANGING TO SNOW LATE THIS AFTERNOON OR EVENING FROM CENTRAL
INTO SOUTHWEST OKLAHOMA AND WESTERN NORTH TEXAS. PRECIPITATION RATES
GENERALLY SHOULD BE LIGHT WITH PERHAPS BRIEF PERIODS OF MODERATE
INTENSITY.

..LEITMAN.. 03/04/2015

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

ATTN...WFO...OUN...LUB...AMA...

LAT...LON   35579953 36329829 36469783 36349723 36149694 35879676
            35499687 35089728 34529790 34389819 33969938 33690065
            33740149 34110188 34580188 34990158 35579953

Mesoscale Discussions in Oklahoma, 2015Mesoscale Discussions in Texas, 2015Every mesoscale discussion in 2015

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.