12/18 – Rob Knight’s “VERY COLD” Friday Morning Forecast

After a very cold night, a steady warming trend onsets with winds veering to easterly today, southeasterly Saturday with some slow but steady moisture returning. A Pacific type cold front Will move through the area with attendant showers, perhaps a thunderstorm or two, Saturday evening and overnight, clearing the area by Sunday morning. Rainfall amounts should remain generally one-half inch or less for much of the area. Weak high pressure builds in its wake for Sunday with just a modest cool-down in temperatures.

Sunday will be the start of a warming trend that continues through at least Christmas Eve. The center of the surface high pressure that builds will likely move along the north gulf coast under moderating airmass through Tuesday afternoon. Then an onshore flow pattern will become established by middle of the week ahead of what could be a significant cold frontal passage for Christmas Day. There is a considerably large spread in models regarding that latter part of the week. However, the frontal boundary could bring a very cold Arctic air mass Christmas day. Due to the very wide variation in models, I’m going to hold off on getting into a HARD FREEZE issue until early next week.

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