[MCD] SWOMCD

[MCD at goshenarc.org]

ACUS11 KWNS 060012
SWOMCD
SPC MCD 060011 
MIZ000-INZ000-ILZ000-WIZ000-IAZ000-MOZ000-MNZ000-KSZ000-NEZ000-SDZ000-060615-

MESOSCALE DISCUSSION 0032
NWS STORM PREDICTION CENTER NORMAN OK
0611 PM CST WED JAN 05 2005

AREAS AFFECTED...CNTRL PLAINS...UPPER MIDWEST...GREAT LAKES

CONCERNING...HEAVY SNOW 

VALID 060011Z - 060615Z

A LARGE AREA OF LIGHT TO MODERATE SNOW WITH PERIODS OF HEAVY SNOW
WILL SPREAD ENEWD ACROSS THE UPPER MIDWEST THIS EVENING. SNOWFALL
RATES OF 1 TO 2 INCHES PER HOUR WILL BE POSSIBLE IN A BAND ACROSS SE
NEB...SRN IA...FAR NRN MO...NRN IL AND FAR SRN WI. SNOWFALL RATES UP
TO AN INCH PER HOUR WILL BE POSSIBLE FROM NERN NEB EXTENDING ENEWD
TO SCNTRL WI AND FROM NCNTRL MO TO NCNTRL IL.

AN UPPER-LOW PRESSURE SYSTEM IS CURRENTLY LOCATED ACROSS THE CNTRL
PLAINS WITH A 100 KT MID-LEVEL JET IN PLACE ACROSS WRN MO. THE JET
IS CAUSING STRONG AND WIDESPREAD LARGE-SCALE ASCENT ACROSS THE
REGION. LOW-LEVEL WINDS ARE CURRENTLY BACKED TO THE EAST FROM SE NEB
EXTENDING ENE ACROSS SRN IA INTO NRN IL. THIS COMBINED WITH
MID-LEVEL TEMPS OF -15C TO -20 C AND SFC TEMPS THE TEENS AND 20S F
WILL RESULT IN PERIODIC HEAVY SNOWFALL RATES IN THIS ZONE THROUGH
MIDNIGHT WITH SNOWFALL RATES LIKELY REACHING 1 TO 2 INCHES PER HOUR
AT TIMES. SNOWFALL RATES WILL DROP OFF QUICKLY FROM WEST TO EAST AS
A DEFORMATION ZONE CURRENTLY ACROSS NE KS MOVES SLOWLY ENEWD ACROSS
NRN MO THIS EVENING.

THE SERN EXTENT OF THE MODERATE TO HEAVY SNOW WILL GENERALLY BE
NORTHWEST OF THE MID-LEVEL JET...EXTENDING NEWD FROM CNTRL MO ACROSS
CNTRL IL TO SWRN LOWER MI. A MIXTURE OF SLEET AND SNOW WILL BE
POSSIBLE IN THIS ZONE. AS SFC TEMPS CONTINUE TO COOL...A CHANGE TO
ALL SNOW SHOULD OCCUR.

THE AMOUNT OF LARGE-SCALE ASCENT GRADUALLY DROPS OFF ACROSS NE NEB
...NRN IA INTO SCNTRL WI. THIS IS PARTIALLY DUE TO THE WEAKENING LOW
TO MID-LEVEL FLOW IN THIS REGION. STILL...SNOWFALL RATES UP TO 1
INCH PER HOUR WILL BE POSSIBLE IN THIS ZONE WITH SNOWFALL RATES
DECREASING ACROSS NE NEB AND NWRN IA LATER THIS EVENING AS THE
UPPER-LOW PASSES OVERHEAD.

..BROYLES.. 01/06/2005

...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 00-01 UTC...
06-07 UTC...12-13 UTC...AND 18-19 UTC AS SIGNIFICANT SHORT
RANGE WINTER WEATHER EVENTS UNFOLD.  THIS SCHEDULE WILL BE
USED FROM DECEMBER 1 THROUGH FEBRUARY 28.

ATTN...WFO...IWX...GRR...LOT...ILX...MKX...LSX...DVN...ARX...MPX...DMX...EAX...FSD...OAX...TOP...GID...LBF...GLD...

43919082 43398695 43128632 42598608 42178629 41478714
40878869 39389167 38669328 38719435 38969453 39589497
39919560 40069662 39719769 39459865 39409917 39829965
40499964 41829877 43149701 43959312 

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