Special Weather Statement
Issued by NWS St. Louis, MO

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SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
515 AM CST TUE DEC 23 2014

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-232200-
GREENE IL-MACOUPIN IL-MONTGOMERY IL-BOND IL-FAYETTE IL-CLINTON IL-
MARION IL-WASHINGTON IL-RANDOLPH IL-ADAMS IL-BROWN IL-PIKE IL-
CALHOUN IL-JERSEY IL-MADISON IL-ST. CLAIR IL-MONROE IL-KNOX MO-
LEWIS MO-SHELBY MO-MARION MO-MONROE MO-RALLS MO-PIKE MO-BOONE MO-
AUDRAIN MO-MONITEAU MO-COLE MO-OSAGE MO-CALLAWAY MO-MONTGOMERY MO-
LINCOLN MO-GASCONADE MO-WARREN MO-ST. CHARLES MO-FRANKLIN MO-
ST. LOUIS MO-ST. LOUIS CITY MO-JEFFERSON MO-CRAWFORD MO-
WASHINGTON MO-ST. FRANCOIS MO-STE. GENEVIEVE MO-IRON MO-
MADISON MO-REYNOLDS MO-
INCLUDING THE CITIES OF...LITCHFIELD...VANDALIA...SALEM...
CHESTER...QUINCY...EDWARDSVILLE...BELLEVILLE...HANNIBAL...
BOWLING GREEN...COLUMBIA...MEXICO...JEFFERSON CITY...ST CHARLES...
UNION...ST LOUIS...FARMINGTON
515 AM CST TUE DEC 23 2014

...POTENTIALLY SIGNIFICANT WINTER STORM FOR SOME AREAS OF THE
BI-STATE REGION LATE TONIGHT AND WEDNESDAY...

A NEW STORM SYSTEM IS TAKING SHAPE OVER TEXAS AND IS EXPECTED TO
TRACK NORTHEASTWARD INTO NORTHERN INDIANA BY NIGHTFALL WEDNESDAY.
PRECIPITATION FROM THIS SYSTEM WILL ALREADY MOVE INTO PARTS OF OUR
REGION BY THIS AFTERNOON AND EVENING AND WILL STRENGTHEN AND
EXPAND OVERNIGHT AND WEDNESDAY MORNING WITH THE PRECIPITATION
THEN PULLING OUT WEDNESDAY AFTERNOON. AS IT LOOKS NOW...THE MOST
PERSISTENT PRECIPITATION WILL BE OVER SOUTHEAST MISSOURI...THE
SAINT LOUIS METRO AREA...AND SOUTHWEST ILLINOIS.

TEMPERATURES WILL BE WARM ENOUGH WHEN THE PRECIPITATION FIRST
MOVES IN LATER TODAY TO RESULT IN RAIN. BUT BY LATE TONIGHT...
AS COLDER AIR FILTERS IN...RAIN WILL CHANGE OVER TO A WET SNOW.
THIS CHANGEOVER TO WET SNOW WILL CONTINUE THROUGH WEDNESDAY
MORNING FOR THE REST OF THE AREA.

AREAS THAT HAVE THE HIGHEST SNOWFALL POTENTIAL EXTEND FROM PARTS
OF THE EASTERN OZARKS IN SOUTHEAST MISSOURI THROUGH THE SAINT
LOUIS METRO AREA AND EXTENDING NORTHEASTWARD UP THE INTERSTATE 55
CORRIDOR TOWARDS CENTRAL ILLINOIS. IT IS HERE WHERE THE MOST
LIKELY SNOWFALL AMOUNTS LOOK TO BE 1 TO 2 INCHES OF WET SNOW THAT
WILL PRIMARILY ACCUMULATE ON GRASSY SURFACES. IN ADDITION...THERE
ALSO APPEARS A REASONABLE CHANCE OF A VERY NARROW BAND OF HEAVY
SNOW THAT COULD RESULT IN MUCH HIGHER SNOWFALL AMOUNTS...HOWEVER...
CONFIDENCE ON THE EXACT LOCATION OF THIS BAND OF HEAVY SNOW IS NOT
HIGH AT THIS TIME. AREAS TO THE NORTH AND WEST OF SAINT LOUIS
METRO SHOULD RECEIVE NO MORE THAN A DUSTING OF SNOW...IF ANY AT
ALL.

FOR MOST LOCATIONS...THE IMPACTS OF THIS SNOW ARE EXPECTED TO BE
MINIMAL TO ROADS DUE TO TEMPERATURES JUST ABOVE FREEZING AND WARM
GROUND. BUT IF THE VERY NARROW BAND OF HEAVY SNOW MATERIALIZES...
SNOW OR SLUSH COVERED ROADS WILL LIKELY RESULT AND WILL OVERLAP
MORNING RUSH HOUR TIMES FOR SOME LOCATIONS.

THOSE WITH HOLIDAY TRAVEL PLANS ON WEDNESDAY SHOULD CLOSELY
MONITOR DEVELOPMENTS WITH THIS STORM AND BE AWARE OF THE
POTENTIAL FOR HAZARDOUS DRIVING CONDITIONS FOR SOME LOCATIONS.
SOME PARTS OF THIS FORECAST MAY STILL CHANGE AS THERE IS
UNCERTAINTY WITH RESPECT TO CHANGEOVER TO SNOW TIMES AND
POTENTIAL.

$$

TES



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