A prolonged period of well below normal and at times record temperatures and light snowfall events culminated in a classic winter storm on Presidents Day that brought up to 10-12 inches of snow to the county warning area. An anomalously cold Arctic air mass had engulfed the region for a week prior to this event, keeping temperatures below freezing. A renewed shot of Arctic air surged into the area over the weekend, and temperatures struggled to make it out of the single digits Sunday and Monday, with lows dropping below zero. Deep atmospheric lift provided by coupled upper-level jet streaks, an approaching mid-level trough, and mid-level frontogenesis took advantage of modest Gulf moisture moving north into the mid-Mississippi Valley to produce snow, heavy at times, Monday the 15th of February. The highest snowfall amounts occurred in east-central and southeast Missouri and southern Illinois where stout lift and the highest moisture resided.

Heavy Snow in CRAWFORD, MISSOURI
From 14-FEB-21 17:00:00 to 15-FEB-21 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Several rounds of snow beginning the evening of February 14th. The last round of accumulating snow exited Crawford County by 6 pm on February 15th. Overall, snowfall amounts ranged from 6 to 8 inches.

Heavy Snow in REYNOLDS, MISSOURI
From 14-FEB-21 17:00:00 to 15-FEB-21 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Several rounds of snow beginning the evening of February 14th. The last round of accumulating snow exited Reynolds County by 6 pm on February 15th. Overall, snowfall amounts ranged from 6 to 8 inches.

Heavy Snow in IRON, MISSOURI
From 14-FEB-21 17:00:00 to 15-FEB-21 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Several rounds of snow beginning the evening of February 14th. The last round of accumulating snow exited Iron County by 6 pm on February 15th. Overall, snowfall amounts ranged from 6 to 10 inches.

Heavy Snow in MADISON, MISSOURI
From 14-FEB-21 18:00:00 to 15-FEB-21 18:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Several rounds of snow beginning the evening of February 14th. The last round of accumulating snow exited Madison County by 6 pm on February 15th. Overall, snowfall amounts ranged from 6 to 8 inches.

Heavy Snow in ST. FRANCOIS, MISSOURI
From 14-FEB-21 18:00:00 to 15-FEB-21 19:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Several rounds of snow beginning the evening of February 14th. The last round of accumulating snow exited St. Francois County by 7 pm on February 15th. Overall, snowfall amounts ranged from 6 to 9 inches.

Heavy Snow in WASHINGTON, MISSOURI
From 14-FEB-21 18:00:00 to 15-FEB-21 19:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Several rounds of snow beginning the evening of February 14th. The last round of accumulating snow exited Washington County by 7 pm on February 15th. Overall, snowfall amounts ranged from 6 to 9 inches.

Heavy Snow in FRANKLIN, MISSOURI
From 14-FEB-21 18:00:00 to 15-FEB-21 19:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Several rounds of snow beginning the evening of February 14th. The last round of accumulating snow exited Franklin County by 7 pm on February 15th. Overall, snowfall amounts ranged from 6 to 8 inches.

Heavy Snow in STE. GENEVIEVE, MISSOURI
From 14-FEB-21 18:00:00 to 15-FEB-21 19:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Several rounds of snow beginning the evening of February 14th. The last round of accumulating snow exited Ste. Genevieve County by 7 pm on February 15th. Overall, snowfall amounts ranged from 6 to 8 inches.

Heavy Snow in JEFFERSON, MISSOURI
From 14-FEB-21 18:00:00 to 15-FEB-21 19:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Several rounds of snow beginning the evening of February 14th. The last round of accumulating snow exited Jefferson County by 7 pm on February 15th. Overall, snowfall amounts ranged from 6 to 8 inches.

Heavy Snow in ST. LOUIS, MISSOURI
From 14-FEB-21 20:00:00 to 15-FEB-21 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Several rounds of snow beginning the evening of February 14th. The last round of accumulating snow exited St. Louis County by 8 pm on February 15th. Overall, snowfall amounts ranged from 4 to 8 inches.

Heavy Snow in ST. LOUIS (C), MISSOURI
From 14-FEB-21 20:00:00 to 15-FEB-21 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Several rounds of snow beginning the evening of February 14th. The last round of accumulating snow exited the City of St. Louis by 8 pm on February 15th. Overall, snowfall amounts ranged from 4 to 6 inches.

Heavy Snow in GASCONADE, MISSOURI
From 14-FEB-21 18:00:00 to 15-FEB-21 19:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Several rounds of snow beginning the evening of February 14th. The last round of accumulating snow exited Gasconade County by 7 pm on February 15th. Overall, snowfall amounts ranged from 6 to 8 inches with the heaviest amounts across the northern portions of the county.

Heavy Snow in ST. CHARLES, MISSOURI
From 14-FEB-21 20:00:00 to 15-FEB-21 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Several rounds of snow beginning the evening of February 14th. The last round of accumulating snow exited St. Charles County by 8 pm on February 15th. Overall, snowfall amounts ranged from 6 to 8 inches.

Heavy Snow in WARREN, MISSOURI
From 14-FEB-21 21:00:00 to 15-FEB-21 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Several rounds of snow beginning the evening of February 14th. The last round of accumulating snow exited Warren County by 8 pm on February 15th. Overall, snowfall amounts ranged from 6 to 8 inches.

Heavy Snow in LINCOLN, MISSOURI
From 14-FEB-21 22:00:00 to 15-FEB-21 20:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Several rounds of snow beginning the evening of February 14th. The last round of accumulating snow exited Lincoln County by 8 pm on February 15th. Overall, snowfall amounts ranged from 6 to 8 inches.