Mix of Snow, Sleet & Freezing Rain SundayJanuary 12th, 2013 at 11:29 am by Chad Evans under Chad's WLFI Weather Blog
HEAVY RAINFALL THEN THE ROUND OF WINTRY MIX…………
After heavy rainfall of 1-1.75″ from northwest to southeast tonight (Flood Watch Tipton & Boone counties), a mix of snow, sleet & freezing rain (beginning Sunday morning northwest of Lafayette) will occur across the viewing area through the day before ending by Sunday evening.
TIMING OF 32 DEGREES……….
Temperatures look to fall all day from 32 in the morning to 26 by Sunday late afternoon. Temperature should drop to 32 at Morocco by 4 a.m., Lafayette by 7 a.m. & reach U.S. 31 by 10 a.m.
TIMING OF HIGHEST WIND GUSTS……….
Winds may gust to 25 mph Sunday, but the highs gusts to 35 mph will occur later tonight-early Sunday morning.
POTENTIAL SNOW, SLEET & GLAZE ICE ACCUMULATIONS………
Accumulation projections for snow, sleet & freezing rain are approaching Winter Storm Warning criteria in Illinois & less in Missouri. Consensus points towards 2-6″ of snowfall in Illinois with up to 0.6″ of sleet & 0.5″ of glaze ice.
AS FOR OUR VIEWING AREA, around 0.5″ to as much as 2″(highest potential amount) of snow/sleet are possible with the best potential of the higher snow/sleet accumulations in our northwestern counties. Up to 0.1″ of glaze is possible area-wide, but it may exceed that a bit in our northwest counties (0.15″ glaze).
Banding features in the precipitation projections will result is some variance of this range across the area within pretty short distances.
Winter Weather Advisory will likely be issued for part of if not for all of the viewing area for Sunday. It may start as Winter Weather Advisory & may or may not be upgraded to Winter Storm Warning for Illinois. Just trying to project what direction NWS will go based on the potential accumulations. Winter Storm Warning trigger may not be pulled because it appears the really intense 6″ snowfall totals & high glazing accretions will occur in narrow bands as those banding features become established there in Illinois tonight.