[MCD] SWOMCD

[MCD at goshenarc.org]

ACUS11 KWNS 060557
SWOMCD
SPC MCD 060557 
MIZ000-OHZ000-INZ000-WIZ000-ILZ000-IAZ000-MNZ000-MOZ000-NEZ000-061200-

MESOSCALE DISCUSSION 0034
NWS STORM PREDICTION CENTER NORMAN OK
1157 PM CST WED JAN 05 2005

AREAS AFFECTED...UPPER MIDWEST...OH VALLEY...GREAT LAKES

CONCERNING...HEAVY SNOW 

VALID 060557Z - 061200Z

BANDS OF MODERATE TO HEAVY SNOWFALL RATES WILL CONTINUE TO MOVE
ENEWD ACROSS THE UPPER MIDWEST AND GREAT LAKES REGION OVERNIGHT.
THE HEAVIEST BANDS WILL BE CAPABLE OF 1 TO 2 INCH PER HOUR SNOWFALL
RATES FROM ERN IA ENEWD TO LOWER MI. UP TO 1 INCH PER HOUR RATES
WILL BE POSSIBLE FROM NRN IA ACROSS CNTRL WI AND 
NCNTRL IL TO NW OH.

AN UPPER-LEVEL LOW CENTER IS CURRENTLY OVER FAR SW IA AND THIS
FEATURE WILL CONTINUE TO DRIFT NEWD OVERNIGHT REACHING SRN WI BY
DAYBREAK. A MID-LEVEL JET OF 100 KT IS LOCATED FROM CNTRL MO TO NW
OH. THE EXIT REGION OF THE JET IS PROVIDING STRONG AND WIDESPREAD
LARGE-SCALE ASCENT FROM NRN IND EXTENDING WNWWD ACROSS NRN IL INTO
IA. HEAVY SNOWBANDS ARE LOCATED ABOUT 150 TO 200 STATUTE MILES
NORTHWEST OF THE MID-LEVEL JET AXIS. IN ADDITION...A LOW-LEVEL JET
IS ORIENTED FROM EAST TO WEST FROM SRN LOWER MI TO SRN WI AND IS
PROVIDING STRONG ISENTROPIC ASCENT FAVORABLE FOR HEAVY SNOW. AS THE
UPPER-LEVEL SYSTEM SHIFTS NEWD OVERNIGHT...SNOW RATES OF 1 TO 2
INCHES PER HOUR WILL SPREAD ACROSS ERN IA...NRN IL..SRN WI AND INTO
CNTRL LOWER MI.

SNOWFALL RATES WILL CONTINUE TO BE UP TO AN INCH PER HOUR OVER SRN
MN...SCNTRL WI AND NRN LOWER MI. HOWEVER...THE HIGHER SNOWFALL RATES
WILL BE BRIEF DUE TO DECREASING FLOW AND WEAKER LARGE-SCALE ASCENT.
DUE TO TEMPS NEAR FREEZING ACROSS CNTRL IL...NRN IND AND NW
OH...PRECIPITATION SHOULD REMAIN A MIX OF SNOW...SLEET AND FREEZING
RAIN. HOWEVER...A CHANGEOVER TO ALL SNOW WILL BE POSSIBLE BY 09Z TO
12Z ACROSS THIS ZONE AS SFC TEMPS CONTINUE TO COOL.

..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...CLE...ILN...DTX...APX...IWX...GRR...IND...GRB...LOT...ILX...MKX...DVN...ARX...MPX...DMX...EAX...FSD...OAX...

44139303 44858515 44308360 43108298 41848311 40638419
39828774 40188995 40869174 40689360 40469581 42749599 

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