An upper low pressure trough moving across the northern Rocky Mountains will induce a low pressure trough and surface low over the Texas panhandle and Southern Plains region today and Wednesday December 2nd and 3rd. Interaction between this lower pressure and higher pressure over the Gulf of Mexico will tighten the pressure gradient across Deep South Texas. In turn, Southeast to South winds increase to breezy levels, 15 to 25 mph, later this afternoon with some gusts around 30 mph. The low pressure area continues to deepen tonight into Wednesday with winds picking up another notch.
Windy and gusty conditions are anticipated across much of the Rio Grande Valley with South winds to increase 20 to 30 mph with stronger conditions along the coastal region and across portions of Cameron, Willacy and Kenedy counties were winds could range from 25 to 35 mph with a few gusts to 40 mph. A wind advisory might be necessary, across the Lower Valley, should these windy conditions come to past. Although not unheard of, windy days in December are not as common as the typical windy days of March or Spring. The longer and usually warmer days in the Spring allow for deeper mixing of the boundary layer winds, up to 5000 feet above the surface, to translate to the surface. Wednesday’s above the surface up to 5000 feet are forecast to increase to 45 mph with a portion of these winds working their way to the surface between 10 am and 4 pm.
In addition and as a result of the strong winds, temperatures and humidities will soar over what has been experienced the last few days. Temperatures tonight will be noticeably warmer with minimums running as much as 10 to 20 degrees warmer. Highs on Wednesday will be around 10 degrees above normal with Highs ranging from 80 near the coast to mid 80s inland. Humidity levels will climb as the South winds off the Gulf of Mexico usher in dew points which will exceed 65 degrees along the coast and near 60 degrees across the western portions of Deep South Texas by Wednesday morning.
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