Widespread Heavy Rain Likely Tuesday

Heavy rain is on track to move into the Tennessee Valley tomorrow. It will mean a wet morning drive with low visibility, then a wet rest-of-the-day to follow.

Posted: Dec. 4, 2017 3:06 PM
Updated: Dec. 4, 2017 3:06 PM

Tuesday Impacts
Severe thunderstorms are not likely, but some heavy rain is possible. The morning drive will be especially difficult with wet and slippery roads and low visibility. Rainfall amounts of 1-2 inches are possible with locally higher amounts in spots. Rain will fall most of the day. It will end gradually from west to east starting around 2 PM and be out of the Tennessee Valley by 6-7 PM. Tuesday's precipitation will be limited to rain. NO snow will fall. The moisture will move away before the cold air arrives. 

We've been tracking a rain maker that would open up a cold air flow into the Tennessee Valley this week for the better part of the last week. That big disturbance is knocking on our door this evening. Rain showers are surging northeward across Mississippi and Louisiana behind a warm front. That warm front is attached to low pressure over the Upper Midwest. A cold front extends from the low pressure southwestward through New Mexico.

The showers and a warm up will accompany the warm front this evening. Rain will increase tomorrow morning with the approach of the cold front. Tomorrow will be warm ahead of the cold front with morning 50s and afternoon 60s. The colder air will arrive starting tomorrow night.

Snow? Possible, But Not Likely....

Wednesday and Thursday will be colder with highs in the upper 40s and lower 50s. Lows will be in the 30s. Another cold front will sneak by on Friday. It will bring more clouds to the Tennessee Valley, but precipitation looks to stay north of us. Highs will drop to the upper 30s and lower 40s for Friday and Saturday. Lows will drop into the 20s. The jet stream will line up so that it blows from central Canada to the Southeastern U.S. Small low pressure waves embedded within the flow of the jet stream can spin up quickly and sneak by. Some models are hinting at that happening on Saturday. Depending on timing, it could lead to light, brief snow Friday night or Saturday morning. IF snow falls, accumulation is unlikely.

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