SWOMCD
SPC MCD 061712
NEZ000-KSZ000-062115-
MESOSCALE DISCUSSION 2205
NWS STORM PREDICTION CENTER NORMAN OK
1112 AM CST SUN DEC 06 2009
AREAS AFFECTED...NW/N-CENTRAL KS...SWRN INTO S-CENTRAL NEB
CONCERNING...HEAVY SNOW
VALID 061712Z - 062115Z
LOCALIZED AREAS MAY EXPERIENCE SNOWFALL RATES BRIEFLY EXCEEDING
1"/HR FROM NWRN KS/SWRN NEB INTO PORTIONS OF FAR N-CENTRAL
KS/CENTRAL NEB THIS AFTERNOON.
SHORTWAVE TROUGH EVIDENT ON WV IMAGERY APPEARS TO BE SHEARING APART
OVER THE CENTRAL HIGH PLAINS...WITH PIECE EJECTING NEWD ACROSS THE
CENTRAL PLAINS THIS AFTERNOON. MODELS CONSISTENT IN FORECASTING
ZONE OF INCREASING UVV/MOISTENING WITHIN FAVORABLE DENDRITIC GROWTH
ZONE EXTENDING FROM SWRN NEB/FAR NWRN KS NEWD INTO CENTRAL NEB
THROUGH THE LATE AFTERNOON...COINCIDENT WITH MAXIMUM OF 850-700 MB
FRONTOGENESIS. LATEST OBSERVATIONS FROM SWRN NEB INDICATE
SNOW-LIQUID RATIOS BETWEEN 15-20 TO 1 ARE ALREADY ONGOING THIS
MORNING. THUS...ZONE OF MODERATE TO ISOLATED HEAVY SNOWFALL WITH
MAXIMUM RATES NEAR 1"/HR LASTING FROM 2-3 HRS SHOULD BECOME
ESTABLISHED...WITH OVERALL AREA SPREADING QUICKLY NEWD THROUGH THE
DAY.
..EVANS.. 12/06/2009
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
...NOTICE...
SPC WINTER WEATHER MESOSCALE DISCUSSIONS WILL BE ISSUED ON A
SCHEDULED BASIS FROM DECEMBER 1 THROUGH FEBRUARY 28...FOUR
TIMES A DAY...AROUND 00 UTC...06 UTC...12 UTC...AND 18 UTC
FOR SIGNIFICANT SHORT RANGE WINTER WEATHER EVENTS.
ATTN...WFO...OAX...TOP...GID...LBF...GLD...
LAT...LON 39709829 39140038 39410189 40250185 41040070 41419864
41189724 40329719 39709829
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