The National Weather Service has posted a Freezing Fog Advisory for several North and Central Alabama Counties:
URGENT - WEATHER MESSAGE National Weather Service Huntsville AL 1112 PM CST Wed Jan 13 2021 ALZ001-002-005-006-009-TNZ076-096-097-141400- /O.EXB.KHUN.ZF.Y.0002.000000T0000Z-210114T1400Z/ Lauderdale-Colbert-Limestone-Madison-Jackson-Moore-Lincoln- Franklin TN- Including the cities of Florence, Muscle Shoals, Sheffield, Tuscumbia, Athens, Huntsville, Scottsboro, Lynchburg, Fayetteville, Winchester, Sewanee, Decherd, Estill Springs, and Cowan 1112 PM CST Wed Jan 13 2021 ...FREEZING FOG ADVISORY IN EFFECT UNTIL 8 AM CST THURSDAY... * WHAT...Visibility one quarter mile or less in freezing fog. * WHERE...In Alabama, Lauderdale, Colbert, Limestone, Madison and Jackson Counties. In Tennessee, Moore, Lincoln and Franklin TN Counties. * WHEN...Until 8 AM CST Thursday. * IMPACTS...Hazardous driving conditions due to low visibility and potential frost on bridges. PRECAUTIONARY/PREPAREDNESS ACTIONS... If driving, slow down, use your headlights, and leave plenty of distance ahead of you. Also, be alert for frost on bridge decks causing slippery roads.
The freezing fog early Wednesday was quite a sight, and it was a challenge for some drivers: slick roads in the thickest fog.
A weak upper-air disturbance brought some showers of rain, sleet and graupel (larger ice pellets) in Central and North Alabama Wednesday afternoon. It didn’t ‘accumulate’ to anything, but it did leave behind wet ground and cold air!
This disturbance moves away, the sky clears, and more patchy, dense fog develops. Temperatures dropping into the 24ºF-29ºF range mean more freezing fog early Thursday morning, so be aware of the chance that some roads could be slick where fog is thickest: especially near rivers, lakes, ponds and streams.
Thursday afternoon looks milder for a change! We’ll warm into the upper 50s ahead of a cold front. The southwest wind picks up to around 15-25 miles per hour as the front nears in the afternoon, and it shifts to the northwest as the front passes. Some light showers are possible Thursday evening through Friday morning as the colder air drains into the Tennessee Valley.