MESO: Mesoscale Discussion 0573

ACUS11 KWNS 070026
SWOMCD
SPC MCD 070026
MNZ000-WIZ000-SDZ000-NDZ000-070230-

MESOSCALE DISCUSSION 0573
NWS STORM PREDICTION CENTER NORMAN OK
0726 PM CDT SUN APR 06 2008

AREAS AFFECTED...PARTS OF NRN MN

CONCERNING...HEAVY SNOW

VALID 070026Z - 070230Z

HEAVY SNOW POTENTIAL IS EXPECTED TO BEGIN DIMINISHING MORE RAPIDLY
WITHIN THE NEXT FEW HOURS.

THE COLD CANADIAN VORTEX IS IN THE PROCESS OF ACCELERATING NORTHEAST
OF HUDSON BAY. AND...AS THIS OCCURS...FRONTOGENETIC FORCING...IN
DEFORMATION ZONE NORTHEAST OF THE PROGRESSIVE CLOSED LOW MIGRATING
ACROSS EASTERN SOUTH DAKOTA INTO SOUTHERN MINNESOTA...IS WEAKENING.
MODELS SUGGEST THAT THIS WILL RESULT IN A RAPID DECLINE IN SNOW
RATES ACROSS NORTH CENTRAL/NORTHEASTERN MINNESOTA BETWEEN NOW AND
07/03Z. AT THE SAME TIME...SNOW RATES MAY BRIEFLY INCREASE ONCE
AGAIN IN ZONE OF STRONGER MID-LEVEL CYCLONIC VORTICITY ADVECTION TO
THE NORTHEAST OF THE LATTER LOW...SOUTH/EAST OF FARGO INTO THE
BEMIDJI/PARK RAPIDS AREA DURING THE NEXT FEW HOURS. BUT...LOW/MID
LEVEL DRYING WRAPPING AROUND THE EASTERN PERIPHERY OF THE
CIRCULATION IS CUTTING OFF INFLOW OF HIGHER MOISTURE CONTENT AIR.
AND...IT APPEARS PROBABLE THAT AVERAGE SNOW RATES WILL REMAIN BELOW
1 INCH PER HOUR...BEFORE PRECIPITATION TAPERS OFF LATER THIS
EVENING.

.KERR.. 04/07/2008

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

ATTN...WFO...DLH...MPX...FGF...ABR...

46769677 47259589 47709495 48129381 48309305 47969043
46559191 46349306 45969587 45919662

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