[MCD] SWOMCD

[MCD at goshenarc.org]

ACUS11 KWNS 282329
SWOMCD
SPC MCD 282328 
MOZ000-IAZ000-NEZ000-290530-

MESOSCALE DISCUSSION 2490
NWS STORM PREDICTION CENTER NORMAN OK
0528 PM CST SUN NOV 28 2004

AREAS AFFECTED...PARTS OF CNTRL/ERN NEB AND SWRN/SCENTRAL IA...FAR
NCENTRAL/NWRN MO

CONCERNING...PRECIPITATION TRENDS...WINTER PRECIPITATION 

VALID 282328Z - 290530Z

BAND OF MDT-HVY SNOW OVER CNTRL/ERN NEB ALONG AND SOUTH OF THE I-80
CORRIDOR WITH HOURLY SNOWFALL RATES AROUND 1 INCH SHOULD CONTINUE TO
SHIFT OUT OF SCENTRAL/SERN NEB INTO SWRN IA AND POSSIBLY SCENTRAL IA
THROUGH 06Z BEFORE WEAKENING IN STRENGTH.

MID LEVEL SHORTWAVE TROUGH OVER CNTRL NEB WILL CONTINUE TO WEAKEN AS
IT ENCOUNTERS AN INCREASINGLY CONFLUENT MID LEVEL FLOW DUE TO
PRESENCE OF EWD MOVING NRN STREAM UPPER TROUGH NEAR THE CANADIAN
BORDER. A WELL ESTABLISHED FOCUSED HVY SNOW BAND DUE TO
FRONTOGENESIS ALONG 600-700 MB BAROCLINIC ZONE WILL SLOWLY WEAKEN AS
IT MOVES EWD ACROSS PORTIONS OF SERN NEB INTO SWRN IA. HOURLY
SNOWFALL RATES WILL GRADUALLY LESSEN TO 0.5 IN/HR BETWEEN 03-06Z AS
THE SNOWFALL BAND MOVES INTO SCENTRAL IA AND POSSIBLY NWRN AND
NCENTRAL MO AS LOW LEVEL ISENTROPIC LIFT WEAKENS. AREAS OVER
CENTRAL/ERN NEB WILL SEE A DIMINISHING TREND IN HEAVY SNOWFALL
BETWEEN 00-03Z AS UPPER LEVEL SHORTWAVE/FRONTOGENETIC FORCING MOVES
EAST AND REDEVELOPS FARTHER SOUTHWEST INTO KS.

..CROSBIE.. 11/28/2004

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

...NOTICE...
SPC WINTER WEATHER MESOSCALE DISCUSSIONS WILL BE ISSUED ON A 
SCHEDULED BASIS...FOUR TIMES A DAY...BETWEEN 05-06 UTC...
11-12 UTC...17-18 UTC...AND 23-00 UTC AS SIGNIFICANT SHORT
RANGE WINTER WEATHER EVENTS UNFOLD.  THIS SCHEDULE WILL BE
USED FROM DECEMBER 1 THROUGH FEBRUARY 28 TO ALLOW PARTNERS
AND USERS TO BETTER ANTICIPATE THE TIMING OF SPC WINTER WEATHER
MESOSCALE DISCUSSIONS.

ATTN...WFO...LSX...DVN...DMX...EAX...OAX...GID...

40099895 41399892 41719615 41009244 39819207 39989334
40129733 

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