[MCD] SWOMCD

Thu Nov 24 06:58:11 UTC 2005

ACUS11 KWNS 240656
SWOMCD
SPC MCD 240655 
MIZ000-WIZ000-241300-

MESOSCALE DISCUSSION 2456
NWS STORM PREDICTION CENTER NORMAN OK
1255 AM CST THU NOV 24 2005

AREAS AFFECTED...UPPER MI/NW LOWER MI

CONCERNING...HEAVY SNOW AND NEAR BLIZZARD CONDITIONS 

VALID 240655Z - 241300Z

...MODERATE TO HEAVY LAKE EFFECT SNOW WILL CONTINUE THROUGH THE
OVERNIGHT HOURS IN ADDITION TO 20-40 MPH WINDS...

LATEST RADAR IMAGERY CONTINUES TO INDICATE NUMEROUS BANDS OF
SNOW...NONE OF WHICH ARE PARTICULARLY WELL ORGANIZED AT THIS POINT.
VAD WIND DATA FROM MARQUETTE AND UPPER AIR DATA FROM GREEN BAY
INDICATE STRONG UNIDIRECTIONAL NNWLY WINDS THROUGH A DEEP LAYER.
FORECAST SOUNDINGS SUGGEST MIXING HEIGHTS WILL CONTINUE TO RISE TO
10-12K FEET BY 12Z. GIVEN CONTINUED STRONG COLD ADVECTION AND
UNIDIRECTIONAL PROFILES...ONE OR TWO PLUMES MAY FORM WITH A
FAVORABLE NW FETCH FROM NRN LAKE MI. IF THAT HAPPENS VERY HEAVY SNOW
RATES ARE POSSIBLE...FROM 2-3 INCHES PER HOUR. LAKE RELATIVE
CONVECTIVE INSTABILITY SHOULD ALSO CONTINUE TO INCREASE
OVERNIGHT...SO THUNDER SNOW IS POSSIBLE AS WELL.

..TAYLOR.. 11/24/2005

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

...NOTICE...
SPC WINTER WEATHER MESOSCALE DISCUSSIONS WILL BE ISSUED ON A
SCHEDULED BASIS FROM DECEMBER 1 THROUGH FEBRUARY 28...FOUR
TIMES A DAY...BETWEEN 00-01 UTC...06-07 UTC...12-13 UTC...
AND 18-19 UTC FOR SIGNIFICANT SHORT RANGE WINTER WEATHER EVENTS.

ATTN...WFO...DTX...APX...GRR...MQT...GRB...

45308725 46178885 47488857 47578755 46508494 44968327
43828337 43288470 43278626 

WWWW