[MCD] SWOMCD

[Mesoscale Convective Discussions]

ACUS11 KWNS 300013
SWOMCD
SPC MCD 300012 
MOZ000-ARZ000-OKZ000-KSZ000-300515-

MESOSCALE DISCUSSION 2240
NWS STORM PREDICTION CENTER NORMAN OK
0612 PM CST WED NOV 29 2006

AREAS AFFECTED...CENTRAL/EASTERN OK AND SOUTHEAST KS/WESTERN MO

CONCERNING...WINTER MIXED PRECIPITATION 

VALID 300012Z - 300515Z

SLEET/FREEZING RAIN...AMIDST THUNDER/LIGHTNING...WILL BECOME MORE
PREVALENT AND DEVELOP EASTWARD ACROSS EAST CENTRAL OK AND
SOUTHWEST/WEST CENTRAL MO THROUGH THE EVENING.

SLEET/FREEZING RAIN WILL BECOME INCREASINGLY COMMON ON THE WEST EDGE
OF EXISTING SOUTHWEST-NORTHEAST ORIENTED PRECIPITATION BAND ACROSS
EASTERN OK INTO FAR SOUTHEAST KS/WESTERN MO...INCLUDING I-40 FROM
NEAR/EAST OF THE OKC METRO AREA AND THE I-44 TURNPIKE IN NORTHEAST
OK /INCLUDING TULSA/...NORTHEASTWARD TO THE JOPLIN MO AND SEDALIA MO
AREAS THROUGH 05Z. AIDED BY CONVECTIVE ELEMENTS VIA CONSIDERABLE
ELEVATED INSTABILITY /900 J/KG MUCAPE PER 20Z NORMAN RAOB/...HIGH
PRECIPITATION RATES HAS BEEN ENOUGH TO COOL TEMPERATURES TO FREEZING
WITH SLEET/FREEZING RAIN. THIS WILL BECOME INCREASINGLY MORE COMMON
AS LOW LEVELS CONTINUE TO COOL THIS EVENING...WITH THE
SLEET/FREEZING RAIN BECOME MORE WIDESPREAD AS LARGE SCALE ASCENT
INCREASES. AS SEEN IN THE 20Z NORMAN OBSERVED SOUNDING AND RECENT
ACARS DATA FROM NEAR TULSA...AN UNSTABLE/ELEVATED WARM LAYER ATOP A
SHALLOW 1-KM SUB-FREEZING LAYER WITHIN THE POST-SURFACE FRONTAL
ENVIRONMENT WILL PROMOTE SLEET/FREEZING RAIN WITH POTENTIAL FOR SOME
ICE ACCUMULATION.

..GUYER.. 11/30/2006

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

ATTN...WFO...LSX...SGF...EAX...TSA...ICT...OUN...

38859413 39239273 38549270 36989359 35499526 34169702
34119783 34489801 36289682 

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