Freezing fog, some dense developed over much of the Tennessee Valley. Visibility was reduced to 1/4 mile or less in many locations.
Every event with a place to put it; 11 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS HUN wrote it up.
Freezing fog, some dense developed over much of the Tennessee Valley. Visibility was reduced to 1/4 mile or less in many locations. Hoar frost developed in some of these locations, including some road surfaces. In addition, black ice also developed due to moisture from the previous day's rainfall refreezing.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Huntsville, AL wrote its last area forecast discussion before the first event at Dec 10, 2:28 PM CST, 12 hours 32 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
11 freezing fog. Local standard time, as filed.
Freezing fog was observed reducing visibility to less than 3/4 miles with temperatures in the middle to upper 20s.
Freezing fog was observed reducing visibility to less than 3/4 miles with temperatures in the middle to upper 20s.
Freezing fog was observed reducing visibility to less than 3/4 miles with temperatures in the middle to upper 20s.
Freezing fog was observed reducing visibility to less than 3/4 miles with temperatures in the middle to upper 20s.
Freezing fog was observed reducing visibility to less than 3/4 miles with temperatures in the middle to upper 20s.
Freezing fog was observed reducing visibility to less than 3/4 miles with temperatures in the middle to upper 20s.
Freezing fog was observed reducing visibility to less than 3/4 miles with temperatures in the middle to upper 20s.
Freezing fog was observed reducing visibility to less than 3/4 miles with temperatures in the middle to upper 20s.
Freezing fog was observed reducing visibility to less than 3/4 miles with temperatures in the middle to upper 20s.
Freezing fog was observed reducing visibility to less than 3/4 miles with temperatures in the middle to upper 20s.
Freezing fog was observed reducing visibility to less than 3/4 miles with temperatures in the middle to upper 20s.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Alabama in 2018Every state in 2018This day in weather historyWarnings in Alabama, December 2018
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 791879, 791880, 791881, 791882, 791883, 791884, 791885, 791886, 791887, 791888, 791889.