11/20 – Rob’s Cool “Midday News” Afternoon Forecast

After a COLD start to the day, temps continue to be CHILLY as a good bit of upper-level clouds are keeping the sunshine away:

Surface high pressure is centered around the Appalachian Mountains and extends south well into the Gulf of Mexico. It will still be building into the forecast area…even into Tuesday mornings as it shifts into the western Atlantic Ocean. Cold air mass within this ridge will be realized with highs struggling to rise much above 60 degrees again today. Going into Tuesday morning, temperatures will be slightly warming than this morning, but likely to fall decently in SW MS and river drainage in SE LA and coastal MS. The forecast temps are close to guidance for lows and blend of models for highs.

Models show a broad trough moving into the middle of the country from the Canada/US border to the Gulf coast tonight. A split flow pattern will begin developing by the Tuesday afternoon. Amplification of both troughs will occur as a reinforcing cold front passes across the CWA Tuesday night. This should occur before moisture returns to the forecast area which means any rain chances will just be for the coastal waters. This frontal passage will take the little warming that will occur on Tuesday and bring temps back down to a good 5 to 10 degrees below normal for Wed-Fri.

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