-- LAKE EFFECT SNOW --

AREA FORECAST DISCUSSION
NWS MARQUETTE MI
1032 AM EST SUN MAR 13 2005 

.DISCUSSION... MAIN UPDATE CONCERN IS LAKE EFFECT.
A POLAR VORTEX WAS LOCATED OVER FAR NW ONTARIO IN THE 
TROUGH...WITH A SHRTWV LOCATED NEAR PICKLE LAKE ONTARIO. 
HEIGHTS CONTINUE TO RISE OVER UPPER MICHIGAN AHEAD OF THIS
SHRTWV...NOW APPROXIMATELY AT 525 DAM (NEAR 10 DAM INCREASE
SINCE 00Z). THESE RISING HEIGHTS HAVE ALSO YIELDED RISING 850MB
TEMPERATURES WITH READINGS AROUND -15C OVER WESTERN LAKE
SUPERIOR AND -18C OVER THE EASTERN PORTION. LAKE EFFECT
CONTINUES DUE TO THE INSTABILITY...BUT DRY AIR AS SEEN ON A
12Z TAMDAR SOUNDING AT CMX AND THE 12Z GRB SOUNDING HAS
KEPT THE LAKE EFFECT LIGHT.