Another high impact winter weather event struck much of north Alabama during the evening of the 18th into the early morning hours of the 19th.  A strong frontal boundary remained nearly stationary along the spine of the Cumberland Plateau. This divided temperatures above freezing in the upper 30s to upper 40s southeast of the front, mainly southeast of Winchester Tennessee, and Huntsville and Cullman in Alabama, with temperatures in the upper 20s to around 30 northwest of the boundary.  Another upper level impulse that produced widespread winter weather across much of the south central U.S. and western Gulf states moved into the region.  This spread widespread precipitation northeast into north Alabama. Southeast of the freeze line, or from roughly Sewanee in Tennessee, through central Jackson County through southeast Madison County (south Huntsville), southeast Morgan into central Cullman County in Alabama, the precipitation was rain for the duration of the event.  In fact, moderate to locally heavy rainfall of 1-2 inches was received.  Northwest of the freeze line, the precipitation began as light snow or ice pellets, but quickly intensified into moderate to heavy snow, with accumulation rates of 1-2 inches per hour.  Snow accumulations reached 2-6 inches across northwest and north central Alabama.  The freeze line lifted northwest slowly, changing the snow to rain for most of north central Alabama.  This made for a slushy mess.  Road conditions deteriorated quickly over the area, including both the north and northwest Huntsville metro, Decatur, Athens, and the Quad Cities/Shoals area.  In Florence, over 100 vehicles were abandoned due to the treacherous road conditions, with many sliding off roadways.  In this part of the area, many roads were still ice/sleet/snow covered from the previous event just a day before.

Winter Weather in JACKSON, ALABAMA
From 17-FEB-21 19:00:00 to 18-FEB-21 00:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Although no official snow accumulations were reported, snowfall accumulations of 1-2 inches are suspected in the higher elevations of far northwest Jackson County.

Winter Storm in MADISON, ALABAMA
From 17-FEB-21 19:00:00 to 18-FEB-21 00:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall amounts of 3 to 5 inches were measured in northwest and west central Madison County. The peak measurement was 5.0 inches 3.9 miles SE of Harvest.

Winter Storm in LAWRENCE, ALABAMA
From 17-FEB-21 18:00:00 to 17-FEB-21 23:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall amounts of 2 to 3 inches were measured in the county The peak measurement was 3.0 inches 1.7 miles SW of Trinity.

Winter Storm in MORGAN, ALABAMA
From 17-FEB-21 18:00:00 to 17-FEB-21 23:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall amounts of 3 to 5 inches were measured in northern and western Morgan County. The peak measurement was 4.8 inches 5.0 miles SE of Decatur.

Winter Storm in FRANKLIN, ALABAMA
From 17-FEB-21 18:00:00 to 17-FEB-21 23:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall amounts of up to 4 inches were measured in the county. The peak measurement was 4.0 inches in Russellville.

Winter Storm in LIMESTONE, ALABAMA
From 17-FEB-21 18:00:00 to 17-FEB-21 23:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall amounts of 3 to 5 inches were measured in the county. The peak measurement was 4.5 inches 3.0 miles NW of Capshaw.

Winter Storm in COLBERT, ALABAMA
From 17-FEB-21 17:00:00 to 17-FEB-21 23:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Snowfall amounts of up to 4.5 inches was measured in the county. The peak measurement was 4.5 inches at the Muscle Shoals Water Plant.

Winter Weather in CULLMAN, ALABAMA
From 17-FEB-21 18:00:00 to 18-FEB-21 22:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Although no official snow accumulations were reported, snowfall accumulations of an inch or less are suspected in far northwest Cullman County.

Winter Storm in LAUDERDALE, ALABAMA
From 17-FEB-21 17:00:00 to 18-FEB-21 00:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Snowfall amounts of up to 3 to 6 inches was measured in the county. The peak measurement was 6.0 inches 5.4 miles E of Florence.