[LeArc] HWODVN@ 3/4/03 6:31:38 AM

[learc@mailman.qth.net]

The following weather message is provided by McDonough County E.S.D.A.


FLUS43 KDVN 041235
HWODVN
IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-051130-

HAZARDOUS WEATHER OUTLOOK...CORRECTED FOR HIGHWAY 20
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
635 AM CST TUE MAR 4 2003

...SIGNIFICANT SNOW ACCUMULATION EXPECTED ACROSS MUCH OF EASTERN
IOWA...NORTHWEST AND WEST CENTRAL ILLINOIS AND FAR NORTHEAST MISSOURI

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN IOWA...
NORTHWEST AND WEST CENTRAL ILLINOIS...AND NORTHEAST MISSOURI.

.DAY ONE...TODAY AND TONIGHT...

POCKETS OF DENSE FOG...REDUCING VISIBILITIES TO LESS THAN ONE
QUARTER MILE...WILL BE FOUND THROUGH SUNRISE BEFORE GRADUALLY LIFTING
AS WINDS INCREASE FROM THE NORTH.

A COLD FRONT WILL SAG JUST SOUTH OF THE AREA TODAY. LOW PRESSURE
OVER THE SOUTHERN PLAINS WILL MOVE NORTHEAST ALONG THE FRONT
WITH MOISTURE OVERRIDING THE COLD AIR AT THE SURFACE...RESULTING IN
PERIODS OF SNOW...HEAVY AT TIMES. MANY AREAS ALONG AND NORTH
OF HIGHWAY 20 WILL SEE A QUICK PERIOD OF SNOW THIS MORNING...WITH
AMOUNTS OF AROUND 1 INCH. SNOW WILL THEN BECOME WIDESPREAD
ACROSS THE REGION THIS AFTERNOON AND CONTINUE INTO TONIGHT BEFORE
TAPERING TO FLURRIES LATE THIS EVENING AND OVERNIGHT.
CURRENT INDICATIONS ARE THAT MOST LOCATIONS WILL SEE BETWEEN 5 AND
8 INCHES OF SNOW. HOWEVER...THERE ARE A COUPLE OF FACTORS WHICH
COULD RESULT IN SNOW ACCUMULATIONS BEING HIGHER. ONE FACTOR IS THE
LOCATION OF THE FRONT AND EXTENT OF POST FRONTAL COOLING. SHOULD THE
FRONT MOVE FURTHER SOUTH THEN SURFACE TEMPERATURES WILL BE SEVERAL
DEGREES COLDER. THIS WOULD RESULT IN HIGHER SNOW TO WATER RATIOS.
A SECOND FACTOR WHICH COULD RESULT IN LOCALLY HIGHER SNOW AMOUNTS IS
THUNDERSNOW. SEVERAL COMPUTER MODELS USED IN FORECASTING
THE WEATHER SHOW SUFFICIENT INSTABILITY ALOFT. SHOULD THIS
INSTABILITY BE REALIZED...THEN THUNDER AND LIGHTNING WOULD ACCOMPANY
SOME OF THE SNOW...RESULTING IN VERY HEAVY SNOWFALL RATES OF 2
INCHES PER HOUR FOR A FEW HOURS.

OVERALL...ROAD CONDITIONS ARE EXPECTED TO DETERIORATE RAPIDLY BY MID
TO LATE AFTERNOON OVER MUCH OF THE AREA. TRAVEL WILL LIKELY BE
DIFFICULT...AND QUITE HAZARDOUS TONIGHT.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY...

THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

ANY SNOWFALL AMOUNTS RELAYED TO THE NATIONAL WEATHER SERVICE IN THE
QUAD CITIES FROM SPOTTERS...EMERGENCY MANAGERS AND THE MEDIA WOULD
BE GREATLY APPRECIATED.


&&

MORE INFORMATION MAY BE OBTAINED AT THE FOLLOWING URL:
HTTP://WWW.CRH.NOAA.GOV/DVN (ALL LOWER CASE)

$$

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