[MCD] SWOMCD
Mesoscale Convective Discussions
mcd at goshenarc.org
Thu Nov 30 23:25:32 UTC 2006
ACUS11 KWNS 302327
SWOMCD
SPC MCD 302327
ILZ000-MOZ000-010400-
MESOSCALE DISCUSSION 2251
NWS STORM PREDICTION CENTER NORMAN OK
0527 PM CST THU NOV 30 2006
AREAS AFFECTED...EAST CENTRAL MO/WEST CENTRAL IL
CONCERNING...WINTER MIXED PRECIPITATION
VALID 302327Z - 010400Z
FREEZING RAIN AND MODERATE/HEAVY SLEET WILL REMAIN PREVALENT ACROSS
EAST CENTRAL MO/WEST CENTRAL IL THROUGH MID/LATE EVENING...INCLUDING
THE ST LOUIS METRO AREA AND PORTIONS OF I-70/I-44/I-55...WITH
ADDITIONAL ICE ACCUMULATIONS VIA LIQUID EQUIVALENTS OF 0.10 IN/HR
AND GREATER.
WARM CONVEYOR/MOISTURE TRANSPORT REGIME AHEAD OF CYCLONE CURRENTLY
CENTERED OVER EASTERN OK WILL CONTINUE TO MAINTAIN AN ELEVATED
ABOVE-FREEZING LAYER INTO EAST CENTRAL MO/WEST CENTRAL IL THIS
EVENING. THIS IS GENERALLY REPRESENTED BETWEEN 700-850 MB IN RUC
POINT SOUNDINGS...SUFFICIENT FOR FULL/PARTIAL MELTING ABOVE A
SHALLOW 1-KM SUB-FREEZING LAYER WITH SURFACE TEMPERATURES IN THE
20S. THIS OVERALL SCENARIO IS EXPECTED TO FLUCTUATE LITTLE THIS
EVENING...UNTIL THE ARRIVAL OF THE CLOSED LOW/COLDER AIR LATER
TONIGHT. WITH CONVECTIVELY ENHANCED ELEMENTS AND DEEP LAYER FORCING
FOR ASCENT OVERSPREADING THE REGION...A MIX OF FREEZING RAIN/SLEET
WILL REMAIN COMMON THROUGH MID/LATE EVENING IN EAST CENTRAL MO AREAS
INCLUDING I-70/I-44 AND COLUMBIA/JEFFERSON CITY/ROLLA/ST LOUIS...AND
WEST CENTRAL IL LOCALES INCLUDING QUINCY AND SPRINGFIELD/I-55.
..GUYER.. 11/30/2006
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...ILX...LSX...DVN...SGF...
39349200 39939147 40668982 40278908 39748913 38438978
37419065 37319100 37099169 37469228 38579232
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