WEDNESDAY NIGHT THROUGH FRIDAY NIGHT...FORECAST CONFIDENCE MEDIUM
A STRONG SHORTWAVE TROUGH WILL CROSS THE ROCKIES INTO THE CENTRAL
PLAINS WED NT WITH CYCLOGENESIS OVER THAT REGION. THE UPPER WAVE
WILL THEN LIFT NEWD WITH STRONG DEEPENING AS IT MOVES NNEWD ACROSS
IL AND ERN WI. THE LOW WILL DEEPEN FROM 993 MB TO NEARLY 970 MB AS
IT OCCLUDES OVER ERN LAKE SUPERIOR. STRONG WSWLY WIND GUSTS OF
40-50 MPH...POSSIBLY HIGHER...WILL LIKELY RESULT THU NT AS THE LOW
MOVES NORTH OF SRN WI.
THE INITIAL ROUND OF LOW TO MID LEVEL WARM ADVECTION WILL BRING
PCPN INTO FAR SRN WI LATE WED NT INTO THU AM. SFC TEMPS WILL BE
AROUND FREEZING AND THEN GRADUALLY WARM. FROST HOWEVER IS DEEP IN
THE GROUND AND FREEZING MAY OCCUR ON ROADWAYS AND SIDEWALKS. THUS
SOME ICING IS EXPECTED THU AM. AS THE LOW AND STRONG UPPER WAVE
APPROACHES FOR THE AFTERNOON...MDT RAINFALL IS EXPECTED WITH ANY
ICING OVER WITH. A MIXTURE OF RAIN AND SNOW MAY OCCUR OVER THE FAR
WRN CWA WHERE TEMPS ARE COLDER ALOFT. THE DRY SLOT WILL ARRIVE BY
LATE AFTERNOON AND EARLY EVENING BUT WRAP AROUND LIGHT SNOW VIA
MID LEVEL FRONTOGENESIS MAY THEN OCCUR THU NT. THE LIGHT SNOW WITH
40-50 MPH WIND GUSTS WOULD CERTAINLY CREATE HAZARDOUS CONDITIONS
WITH A WINTER WEATHER ADVISORY POSSIBLY NEEDED.
WINDS WILL CONTINUE TO DECREASE ON FRIDAY BUT A CLIPPER LOW WILL
PASS FROM IA INTO IL THROUGH FRI NT. THE MAIN BAND OF SNOW MAY
STAY SOUTH OF THE AREA SO ONLY SLIGHT CHANCES OF SNOW FRI NT.
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