SPC MD 178

MD 0178 CONCERNING HEAVY SNOW FOR NW/CNTRL/S-CNTRL KS…NE CO…SE NE


MESOSCALE DISCUSSION 0178
NWS STORM PREDICTION CENTER NORMAN OK
1248 PM CST WED FEB 20 2013

AREAS AFFECTED...NW/CNTRL/S-CNTRL KS...NE CO...SE NE

CONCERNING...HEAVY SNOW

VALID 201848Z - 202245Z

SUMMARY...BAND OF HVY SNOW...WITH RATES AROUND 1 INCH PER
HOUR...WILL CONTINUE MOVING NWD/NEWD ACROSS THE CNTRL PLAINS.

DISCUSSION...SURFACE OBSERVATIONS...SNOWFALL REPORTS...AND RADAR
IMAGERY INDICATE A BAND OF HVY SNOW CONTINUES FROM S-CNTRL KS NWWD
INTO NW KS. MODEL GUIDANCE INDICATES WAA/FRONTOGENESIS WILL CONTINUE
TO SUPPORT THIS BAND FOR THE NEXT SEVERAL HOURS. NRN PORTION OF THIS
BAND /ACROSS NW KS/ IS MOVING NWD QUICKER THAN THE SRN PORTION OF
THIS BAND /ACROSS S-CNTRL KS/ IS MOVING SEWD. AS A RESULT...DURATION
OF HVY SNOW ACROSS S-CNTRL KS MAY BE LONGER THAN AREAS FURTHER
NE...LEADING TO HIGHER SNOWFALL TOTALS.

HOWEVER...A DRYING TREND NOTED ON RADAR IMAGERY IS QUICKLY MOVING
NEWD AND ENDING THE PRECIPITATION AS IT DOES SO. THIS IS LIKELY A
RESULT OF SUBSIDENCE BEHIND THE SHORTWAVE TROUGH. AS SUCH...A
DIMINISHING TREND WITHIN THE SNOW BAND IS EXPECTED LATER THIS
AFTERNOON AS THE SHORTWAVE TROUGH PROGRESSES NEWD INTO THE UPPER MS
VALLEY AND THE SNOW BAND MOVES NEWD INTO SRN NEB. AS A RESULT...THE
SNOW BAND WILL LIKELY DIMINISH BEFORE REACHING CNTRL NEB.

..MOSIER.. 02/20/2013

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

ATTN...WFO...ICT...GID...LBF...DDC...GLD...

LAT...LON   39560220 39990241 40380190 40240052 39359848 38279700
            37869669 37669672 37249725 37859789 38619936 39110104
            39290193 39560220

via SPC Forecast Products http://www.spc.noaa.gov/products/md/md0178.html