A powerful cold front has swept across Texas, bringing sub-freezing temperatures and widespread freezing conditions. The arctic airmass is expected to persist through the weekend, with daytime highs remaining well below normal.
The arctic air behind Sunday’s strong cold front produced subfreezing overnight temperatures across Texas on Monday that will persist today, keeping daytime temperatures well below normal all the way into the weekend. The normal afternoon peak temperature for Jan. 7 in San Antonio is 63 degrees, but most highs in South Texas will climb only into the 40s and 50s today.
Surface high atmospheric pressure will build in from the north, leading to an influx of east-to-northeast winds between 5 and 15 mph. Clear skies tonight will create ideal conditions for radiational cooling, which refers to the cooling of the Earth’s surface at night. Without clouds to trap surface heat from radiating back into the atmosphere, widespread freezing is expected again, with Wednesday morning temperatures dropping into the mid-30s, with feel-like temperatures in the mid-20s. The significant cold front that invaded Texas on Sunday brought the coldest air of the season. Temperatures dropped 30 degrees, going from Sunday afternoon highs in the upper 70s to Monday afternoon temperatures in the 40s. The sudden wintry blast was a shock to the system, especially because we were just wearing shorts and T-shirts during the first weekend of the new year. Widespread freezing temperatures in the predawn hours this week is prompting the National Weather Service office overseeing San Antonio and Austin to issue its first cold weather advisory, a winter weather alert that replaces the wind chill advisory. Under the principle that “cold is cold,” the weather service is streamlining winter weather alerts to improve communication about the severe cold, regardless of wind. Forecasters have a cold weather advisory in effect for South Texas through 9 a.m. this morning because wind chills were expected to be anywhere from 15 to 20 degrees across the Hill Country and the urban centers along the Interstate 35 corrido
COLD WEATHER FREEZING TEMPERATURES TEXAS WINTER STORM NATIONAL WEATHER SERVICE
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