[MCD] SWOMCD

[Mesoscale Convective Discussions]

ACUS11 KWNS 291023
SWOMCD
SPC MCD 291022 
UTZ000-291415-

MESOSCALE DISCUSSION 2233
NWS STORM PREDICTION CENTER NORMAN OK
0422 AM CST WED NOV 29 2006

AREAS AFFECTED...GREAT SALT LAKE/NRN UT

CONCERNING...HEAVY SNOW 

VALID 291022Z - 291415Z

LAKE BLOB...WITH INTENSE SNOW RATES OF 1-3 INCHES PER HOUR...WILL
SHIFT WWD ACROSS THE NRN SALT LAKE VALLEY INTO THE NRN TOOELE RANGE.


VERY STEEP LOW LEVEL LAPSE RATES...ON THE ORDER OF 8 C/KM IN THE
CLOUD BEARING LAYER...HAVE CERTAINLY AIDED LAKE EFFECT SNOW THIS
MORNING OFF THE SALT LAKE.  ALTHOUGH LAKE CONVECTION IS NOT
PARTICULARLY BANDED...LIKELY DUE TO SOMEWHAT SHEARED AND WEAK LOW
LEVEL FLOW...BROAD ZONE OF INTENSE SNOW SHOULD GRADUALLY SHIFT WWD
INTO A MORE N-S ORIENTATION AS MEAN FLOW RESPONDS TO DEEPENING
TROUGH OVER THE 4-CORNERS.  HEAVIEST ACTIVITY SHOULD SHIFT WEST OF
IMMEDIATE SLC AREA...POSSIBLY SPREADING AS FAR WEST AS THE TOOELE
VALLEY.  WITH TIME...DRYING DUE TO WEAK SUBSIDENCE SHOULD RESULT IN
MUCH WEAKER SNOW RATES...POSSIBLY BY 13Z.

..DARROW.. 11/29/2006

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

ATTN...WFO...SLC...

41031251 41061222 40861203 40551189 40421228 40611244 

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