SWOMCD
SPC MCD 210513
KSZ000-OKZ000-211115-
MESOSCALE DISCUSSION 0133
NWS STORM PREDICTION CENTER NORMAN OK
1113 PM CST SAT FEB 20 2010
AREAS AFFECTED...FAR NW OK...CNTRL SRN AND ERN KS
CONCERNING...FREEZING RAIN
VALID 210513Z - 211115Z
BURSTS OF MODERATE TO HEAVY FREEZING RAIN WILL BE POSSIBLE LATE THIS
EVENING AND OVERNIGHT FROM FAR NWRN OK INTO MUCH OF S CNTRL AND E
CNTRL KS. A QUICK 0.10" TO 0.25" WILL BE POSSIBLE.
ISENTROPIC LIFT N OF A STATIONARY FRONT ACROSS OK WILL PERSIST AS AN
UPPER TROUGH LIFTS EWD ACROSS NM AND INTO TX AND OK. A WARM NOSE
ALOFT NEAR 850 MB WILL REMAIN ACROSS MUCH OF SRN AND ERN KS...WITH
SUB-FREEZING TEMPERATURES AT THE SURFACE. STEEP MID LEVEL LAPSE
RATES AND INCREASING THETA-E AROUND 850 MB WILL RESULT IN MARGINAL
CONVECTIVE INSTABILITY AND THE LIKELIHOOD OF ELEVATED THUNDERSTORMS.
THESE STORM CORES MAY PRODUCE LOCALIZED BURSTS OF HEAVY FREEZING
RAIN...POSSIBLY MIXED WITH SLEET OR HAIL ESPECIALLY WITH NWWD EXTENT
WHERE THE COLUMN WILL BE COOLEST.
..JEWELL.. 02/21/2010
...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...TOP...ICT...OUN...DDC...
LAT...LON 38129538 37489752 37029860 36339986 36529994 36899964
37879892 38299843 38779730 38939668 38889609 38129538
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