Thursday, March 25, 2010

Watching Possible Threat for Severe Weather in the TN Valley

Lots of clouds and rain this morning across the Tennessee Valley; even seen a few thunderstorms. Now we watch a storm system to the west for the potential of severe weather later today.

As of midday, starting to see clearing rapidly move to the east. This morning it was located across Arkansas/Louisiana and now it has already advanced through most of Mississippi and now and is knocking on the door of northwest Alabama. You can watch it spread across the area by viewing the WAAY 31 Jerry Damson Tower Cam located in Florence.

As the sun makes its appearance, temperatures are quickly moving in the upward direction. Tupelo, for example, has gone from 56 to 65 in just 3 hours. Dewpoints are also moving upward. Tupelo's dewpoint is now at 58 and may rise briefly into the low 60s; however, the dryline front is rapidly progressing eastward and is located Dyersburg-Greenwood, MS. This could become the focus of storms but currently the focus is the main cold front now along the Mississippi river, the secondary wind shift.

At this time, it appears storms could move into northwest Alabama between 3 and 5 pm. I am still not convinced on much severe weather, today. Those that do occur will have the main threat of hail and gusty winds. There is shear in the atmosphere so some spin is possible but not expecting tornadoes to be widespread. You can never completely rule an isolated one out but I am not overly concerned for that.

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