ST. LOUIS, MO (KTVI) - Following a night of mixed winter precipitation, all Winter Storm Warnings for the Bi-State region were dropped at noon on Saturday. Sleet, snow, and freezing rain began hitting the FOX 2 News viewing area around 6:00pm Friday. Ice accumulations of up to 0.15" have been reported across Crawford, Washington, Iron, and Reynolds Counties and snow accumulations of 6" plus have been reported in places like Pike County in Missouri. In between, a bit of everything was reported.
MoDOT, IDOT, and local road crews were busy overnight clearing roads. Most interstates and main thoroughfares are clear. Warmer temperatures are allowing salt to do its work.
Sweeping out the the winter storm is a strong cold front that will bring a new wave of arctic cold to St. Louis. -Angela Hutti
The storm system is actually unfolding fairly close to expectations. The moisture has split into two primary regions.
WHITE BAND: The zone to the north is transitioning to almost all snow now...with heavy snow expected from Hannibal over through Springfield, IL. That region will see 4" to 6" total.
BRIGHT RED BAND: The second main zone consists of thunderstorms with heavy freezing rain and sleet that exists along and southeast of I-44 in MO and south of I-70 in Illinois. These areas are in the midst of an ice storm. Most of the precipitation so far has been freezing rain in these areas...and I only expect to see sleet mixing in when the heaviest thunderstorm cores move overhead. I'm thinking sleet totals down there will be less than 1" but freezing rain totals could reach to between 1/2" to 3/4" which could be enough to down some power lines and damage some trees...especially in areas southeast of a line from Sullivan...to Festus... over to near Salem, IL.
THE PINK BAND: The northern edge of this southern...thunderstorm enhanced...band of freezing rain will reach up to about the Missouri River...then down I-70 through Saint Louis County .and along I-70 in Illinois. This is the PINK ZONE...which include most of St Louis County and metro south/east. I'm sticking with the idea of freezing rain and sleet...with total sleet of 1/2" to 1"... then up to 1/10th" freezing rain. The real question is will there be enough moisture left behind for accumulating snow later tonight into Saturday morning. I'm thinking yes... but accumulations of snow will be light...maybe 1".
DARKEST BLUE BAND: Between the two main bands will be a region of lesser accumulations... a relative minimum...where conditions will not be as bad overnight. That's within my darkest blue area...where I expect less than 1/10th" of freezing rain...and less than 1" of snow. This would be roughly from Hermann..up to Wentzville...to Jersevyllle and Alton....or just north of I-70.
- Chris Higgins