HAZARDOUS WEATHER OUTLOOK
Issue Date: 530 AM CST THU DEC 24 2009
Expiration: 530 AM CST FRI DEC 25 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
A FLOOD WATCH IS IN EFFECT THROUGH TONIGHT FOR MUCH OF THE
OUTLOOK AREA. A WINTER STORM WATCH IS IN EFFECT LATE
TONIGHT ROUGHLY NORTHWEST OF A DUBUQUE IOWA... TO WASHINGTON
IOWA... TO MEMPHIS MISSOURI LINE.
AREAS OF DENSE FOG REDUCING VISIBILITIES TO ONE QUARTER MILE
OR LESS WILL BE FOUND OVER PORTIONS OF EASTERN IOWA AND
NORTHEAST MISSOURI THIS MORNING.
A MAJOR WINTER STORM WILL TRACK FROM THE LOWER MISSISSIPPI
VALLEY TO EASTERN IOWA BY FRIDAY. RAIN IS EXPECTED TO
BECOME WIDESPREAD AND HEAVY AT TIMES LATER TODAY THROUGH
THIS EVENING...WITH EMBEDDED THUNDER POSSIBLE ESPECIALLY
FROM THE QUAD CITIES SOUTH AND EAST. RAINFALL AMOUNTS OF ONE
HALF...TO ONE AND A HALF INCHES CAN BE EXPECTED. THIS RAIN
WILL BE FALLING ON COLD...FROZEN GROUND AND DENSE SNOW-PACK
ESPECIALLY ALONG AND NORTH OF INTERSTATE 80 TO CREATE
SIGNIFICANT RUNOFF...WHICH WILL RESULT IN RISES AND EVENTUAL
FLOODING ALONG SOME AREA RIVERS AND STREAMS...AS WELL
AS FLOODING OF LOW LYING OR POORLY DRAINED AREAS.
RAIN MAY CHANGE TO SLEET AND SNOW LATE TONIGHT WITH SOME
ACCUMULATIONS POSSIBLE NORTHWEST OF A DUBUQUE IOWA... TO
WASHINGTON IOWA... TO MEMPHIS MISSOURI LINE...AS COLDER AIR
BEGINS TO FILTER INTO THE REGION.
.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY
SNOW WILL RAPIDLY DEVELOP ACROSS MUCH OF THE OUTLOOK AREA ON FRIDAY
...POSSIBLY BECOMING MODERATE TO HEAVY IN PORTIONS OF EASTERN IOWA
AND NORTHEAST MISSOURI. AT LEAST 6 INCHES OF SNOW IS EXPECTED
FRIDAY THROUGH FRIDAY NIGHT...ROUGHLY WEST OF A LINE FROM DUBUQUE
IOWA TO MEMPHIS MISSOURI. ELSEWHERE ACROSS THE OUTLOOK AREA
ACCUMULATIONS SHOULD BE IN THE 1 TO 3 INCH RANGE.
LIGHT SNOW WILL CONTINUE ON SATURDAY INTO SATURDAY NIGHT AS THE
STORM SYSTEM BECOMES NEARLY STATIONARY OVER THE REGION. ADDITIONAL
ACCUMULATIONS THIS WEEKEND SHOULD BE LESS THAN 2 INCHES.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. HOWEVER
REPORTS OF FREEZING RAIN...SLEET AND SNOW TONIGHT IS APPRECIATED.
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