NWS
St. Louis, Missouri

December 3rd - 4th, 2002 Snow Storm
Light to Moderate Snowfall
Across Portions of Central and Southern Missouri and Illinois

Radar Analysis and Impacts:
   
Radar Reflectivity
from WSR-88D KLSX
(image loop)
Snowfall Totals Ending December 5th Satellite Image of the Mississippi Valley Region

 
Storm Assessment:
The first major winter storm of the 2002-2003 season brought significant snowfall from Oklahoma to the Nation's Capitol during the period encompassing December 3rd - 5th. Moderate to heavy snow occurred with this storm system across portions of Southern Missouri and Southern Illinois on December 3rd and 4th.

The snow was generated by a low pressure storm system which developed in the Southern Plains on Tuesday, December 3rd. As this storm system moved eastward into the Lower Mississippi Valley during the late night hours of December 3rd, it began spreading wintry precipitation into the Middle Mississippi Valley. The snow began in the Eastern Ozarks before midnight, and was briefly mixed with sleet during its onset.

The snow continued to expand slowly northward during the early morning hours on the 4th, progressing to near Interstate 70 by daybreak. In the St. Louis Metro Area the snow arrival coincided with the morning rush hour. Snow amounts ranging from one-half to one inch between 6:00 and 9:00 am resulted in major traffic back-ups and hundreds of accidents. Periods of snow continued to effect the region throughout the day.

The snow ended by evening over middle Missouri, by mid-evening over east central Missouri, and finally over south central Illinois during the very early morning hours of December 5th. Snowfall totals for the storm were greatest over the eastern Ozarks where amounts of 8 inches and greater were recorded. As depicted in the snowfall map, there was a very sharp northern edge and gradient of the measurable snowfall. For example, in St. Charles County, snowfall amounts ranged from a light dusting (trace) in Orchard Farm to 4.4 inches at Harvester and Weldon Spring, a distance of less than 10 miles.
 
Snowfall Reports Ending Dec. 5th (morning):
PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS
730 AM CST THU DEC 5 2002

SNOWFALL TOTALS FROM THE DECEMBER 3RD-4TH WINTER STORM ACROSS MISSOURI AND ILLINOIS. LATEST REPORTS CONTINUE TO INDICATE THAT THERE WAS A VERY SHARP NORTHERN EDGE TO THE ACCUMULATING SNOWFALL WITH LITTLE IF ANY REPORTED FROM ABOUT 25 MILES NORTH OF COLUMBIA TO 30 MILES NORTH OF ST LOUIS.
LOCATION


...MISSOURI...

CENTERVILLE
IRONTON
STEELEVILLE
FREDERICKTOWN
STE. GENEVIEVE
FARMINGTON
POTOSI
FARMINGTON 10W
WELDON SPRINGS (NWS)
CUBA
UNION
COTTLEVILLE
ST. LOUIS INTL AIRPORT
ROSEBUD
HERMANN
HOUSE SPRINGS
ARNOLD
ST. CHARLES
ST. PETERS
O'FALLON
VALLEY PARK
CALIFORNIA
JEFFERSON CITY
OWENSVILLE
WARRENTON
ASHLAND
COLUMBIA RGNL AIRPORT
MONTGOMERY CITY
TROY
ORCHARD FARM
MEXICO


...ILLINOIS...

CHESTER
KASKASKIA L/D
KINMUNDY
MARISSA
CENTRALIA
PATOKA
SALEM
SPARTA
SCOTT AFB
OKAWVILLE
NASHVILLE
COLUMBIA
GREENVILLE
RAMSEY
VANDALIA
MILLSTADT
EDWARDSVILLE
JERSEYVILLE
COUNTY




REYNOLDS
IRON
CRAWFORD
MADISON
STE. GENEVIEVE
ST. FRANCOIS
WASHINGTON
ST. FRANCOIS
ST. CHARLES
CRAWFORD
FRANKLIN
ST. CHARLES
ST. LOUIS
GASCONADE
GASCONADE
JEFFERSON
JEFFERSON
ST. CHARLES
ST. CHARLES
ST. CHARLES
ST. LOUIS
MONITEAU
COLE
GASCONADE
WARREN
BOONE
BOONE
MONTGOMERY
LINCOLN
ST. CHARLES
AUDRAIN




RANDOLPH
RANDOLPH
MARION
ST. CLAIR
MARION
MARION
MARION
RANDOLPH
ST. CLAIR
WASHINGTON
WASHINGTON
MONROE
BOND
FAYETTE
FAYETTE
ST. CLAIR
MADISON
JERSEY
SNOWFALL AMOUNT




8.0
8.0
7.5
6.0
6.0
6.0
6.0
5.0
4.4
4.0
4.0
4.0
3.5
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
2.5
2.0
2.0
2.0
1.5
0.5
0.5
T
T
0




5.0
4.0
4.0
4.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
2.0
2.0
2.0
2.0
1.0
0.5

 

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