A major winter storm, the first significant winter event of the season, impacted an area roughly along and east of the Mississippi River. Strong surface low pressure travelled from Arkansas to Lake Huron, while the associated upper level low moved from Oklahoma to northern Illinois. Copious amounts of gulf moisture fed into the system, while very cold and dry air filtered into eastern Iowa. This caused a sharp cut-off to the snow, with 20-30 miles separating 10 inches of snow from little to no snow. At least 6 to 10 inches of snow were common along and east of the Mississippi River, with the highest amount of 18 inches measured at Princeton, Illinois in Bureau county. A 70 mile stretch of I-80 was closed for many hours in Illinois due to accidents and deep snow, with some people stuck in traffic for up to 8 hours. To add to the nearly impossible driving conditions, freezing rain and sleet preceded the heavy snow. The Illinois DNR delivered food by snowmobile to people that were stuck in traffic or stranded at rest stops. The Illinois governor declared 49 counties state disaster areas, including Bureau and Putnam counties in the DVN CWA.

Winter Storm in HANCOCK, ILLINOIS
From 01-DEC-06 00:00:00 to 01-DEC-06 08:15:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotters measured 6 to 12 inches of snow across the county. The most reported was 12 inches at Augusta. An inch of sleet preceded the heavy snow.

Winter Storm in HENRY, ILLINOIS
From 01-DEC-06 00:00:00 to 01-DEC-06 10:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

About 10 to 15 inches of snow was measured by spotters across the county. The most reported was 14.5 inches at Galva.

Winter Storm in BUREAU, ILLINOIS
From 01-DEC-06 00:00:00 to 01-DEC-06 10:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

An average of 15 inches of snow fell across much of the county. The most reported was a whopping 18 inches near Princeton. The snow was preceded by some sleet and freezing rain. At 6 am thundersnow was also observed at Princeton. The Illinois governor declared Bureau county a state disaster area.

Winter Storm in ROCK ISLAND, ILLINOIS
From 01-DEC-06 00:30:00 to 01-DEC-06 07:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

There was a sharp cut-off to the snowfall. About 6 to 8 inches of snow fell across much of the county, except the extreme western portion which received around an inch. The most reported was 8.3 inches at the official measuring site at the Quad City International Airport at Moline, Illinois.

Winter Weather in JO DAVIESS, ILLINOIS
From 01-DEC-06 01:30:00 to 01-DEC-06 09:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall totalled 1 to 3 inches across the county.

Winter Storm in MCDONOUGH, ILLINOIS
From 01-DEC-06 00:00:00 to 01-DEC-06 08:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotters measured 7 to 12 inches of snow across the county. The most reported was 12 inches near Macomb. An inch of sleet preceded the heavy snow.

Winter Storm in WHITESIDE, ILLINOIS
From 01-DEC-06 00:45:00 to 01-DEC-06 09:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

About 6 to 12 inches of snow was measured across the county. The most reported was 11.5 inches at Sterling.

Winter Storm in PUTNAM, ILLINOIS
From 01-DEC-06 00:00:00 to 01-DEC-06 10:15:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ten to 14 inches of snow was measured across the county. The most reported was 14 inches at Hennepin. Some sleet and freezing rain preceded the heavy snow. The governor of Illinois declared Putnam county a state disaster area.

Winter Storm in MERCER, ILLINOIS
From 01-DEC-06 00:00:00 to 01-DEC-06 09:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Most of the county received 6 to 10 inches of snow. The greatest amount was 10 inches near New Windsor.

Winter Storm in CARROLL, ILLINOIS
From 01-DEC-06 01:15:00 to 01-DEC-06 09:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Six to 10 inches of snow fell across the eastern portion of the county. Meanwhile, only 2 to 4 inches fell in the western part.

Winter Storm in HENDERSON, ILLINOIS
From 01-DEC-06 00:00:00 to 01-DEC-06 08:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Around 7 inches of snow was reported across much of the county.

Winter Storm in STEPHENSON, ILLINOIS
From 01-DEC-06 01:35:00 to 01-DEC-06 10:20:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Six to 11 inches of snow was measured over the eastern half of the county. However, 3 to 6 inches was reported in the western half. The most snow measured was 11 inches at Lake Summerset.

Winter Storm in WARREN, ILLINOIS
From 01-DEC-06 00:00:00 to 01-DEC-06 08:30:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Around 10 inches of snow was observed across much of the county.