Timing for rain/snow transition this morning
The cold front should reach our western counties around 3:30AM EST and Chattanooga around 4:30AM EST. Temperatures will cool off after the front passes, but some places will remain slightly above freezing, limiting snow production and accumulation.
That being said, we are still expecting a transition from light rain to wintry mix to snow once the colder air arrives. Approximate transition times are 4AM EST for western counties on the Cumberland Plateau, 6:00AM for Chattanooga, Fort Payne, Cleveland, and Athens, and 7:00AM for Dalton and Polk County. The best snow chance timing across the region should be 5-10AM moving from west to east.
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There is not a lot of moisture in this system, so combined with the slow arrival of the colder temperatures, low snow accumulation is expected.
For the Cumberland Plateau (better snow chances west of the Sequatchie Valley) should be about 1". Rhea, Meigs, Hamilton, Walker, and western Bradley Counties expecting a dusting to 0.5". The Highway 27 corridor may likely see no accumulation, which includes Chattanooga. The better chances for accumulation are for south and east of Chattanooga. Dalton should be about 0.5-1". Eastern Bradley County and McMinn about 1". Monroe, Polk, Murray, and Fannin Counties should be 1-2" with isolated spots from 2-3".
Cloud cover will quickly diminish this afternoon to be mostly sunny, and there should be a midday high in the low to mid-30s. Temperatures will then quickly cool again in the evening hours with overnight lows in the teens to low 20s. With these below freezing temperatures, any residual moisture from the rain or snow showers may freeze making travel hazardous.
If you have to drive today, please be careful on the roads this morning during the rain/snow event and throughout the day as slick spots and black ice may develop.