HAZARDOUS WEATHER OUTLOOK
Issue Date: 507 AM CST TUE DEC 22 2009
Expiration: 515 AM CST WED DEC 23 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
ILLINOIS...NORTHWEST ILLINOIS...WEST CENTRAL ILLINOIS...EAST
CENTRAL IOWA...NORTHEAST IOWA...SOUTHEAST IOWA AND NORTHEAST
MISSOURI.
.DAY ONE...TODAY AND TONIGHT
SNOW OVER PORTIONS OF NORTHWEST ILLINOIS WILL TAPER OFF TO
FLURRIES BY DAYBREAK OR SHORTLY AFTER. ADDITIONAL
ACCUMULATIONS UP TO AN INCH CAN BE EXPECTED EAST OF GALENA...TO
MOUNT CARROLL LINE.
AREAS OF DRIZZLE OR FREEZING DRIZZLE IS LIKELY LATER TODAY AND
TONIGHT. A THIN GLAZE OF ICE IS POSSIBLE ON EXPOSED SURFACES
LEADING TO SLICK DRIVING CONDITIONS... ESPECIALLY NORTH OF
HIGHWAY 34.
.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY
A MAJOR WINTER STORM WILL IMPACT THE REGION WEDNESDAY THROUGH
FRIDAY. HEAVY SNOW IS EXPECTED ALONG THE HIGHWAY 20 CORRIDOR WITH
A SIGNIFICANT ICE STORM POSSIBLE BETWEEN HIGHWAY 20 AND INTERSTATE
80. SLEET IS ALSO POSSIBLE. A WINTER STORM WATCH IS IN EFFECT
ALONG AND NORTH OF INTERSTATE 80. STRONG EAST WINDS GUSTING TO
35 MPH WEDNESDAY AND THURSDAY MAY CAUSE WIDESPREAD POWER OUTAGES
AND KNOCK TREE BRANCHES DOWN WHERE THE ICE STORM OCCURS.
EVENTUALLY THE MIXED PRECIPITATION WILL CHANGE TO ALL RAIN FROM
SOUTH TO NORTH ON THURSDAY...AS WARMER AIR PUSHES NORTHWARD.
HEAVY RAIN FALLING ON THE SNOW PACK OR FROZEN GROUND MAY CAUSE
FLASH FLOODING AND LEAD TO FLOODING OF SOME STREAMS AND RIVERS.
THERE WILL ALSO BE A CHANCE OF THUNDERSTORMS.
COLDER AIR RETURNING TO THE REGION AS THE STORM SYSTEM LIFTS TO
THE NORTH...WILL CHANGE THE RAIN BACK OVER TO SNOW THURSDAY NIGHT
AND FRIDAY.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.
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