Monday, December 14, 2009

Foggy Through Noon, P.M. Showers

The weekend was a bit dreary, but we managed to escape the heavier rain that fell across the southern part of the state. Temperatures warmed slightly yesterday and that trend will continue today. A weakening polar vortex can be attributed to the warming as it has allowed the jet stream to lift to our north. As a result, an area of low pressure located across western Kansas will move northeastward today and should be located near Detroit this evening. Trailing the area of low pressure will be a cold front that will stretch through northeast Texas. At the same time, isentropic ascent will commence across the region. These two factors argue for decent lift across the area, and this should result in a chance for rain, particularly tonight. However, a stalled frontal boundary along the Gulf Coast will provide another source for lift, and this should concentrate the heaviest rains in its vicinity across southern Mississippi.

In the meantime, expect the fog and mist to persist for much of the morning hours. By this afternoon, the fog should slowly dissipate, but low clouds will remain in place as a considerable amount of moisture will be trapped below an inversion. Highs should manage to top out around 63 this afternoon. Rain chances will increase after 6 p.m. as the aforementioned cold front approaches northwest Mississippi. The most rain should fall before midnight, but a few showers will remain possible through 3 a.m. The front should pass through the area just after midnight, which should quickly drop temperatures into the 50s. The low tomorrow morning will be near 48.

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