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Early Heat Surges Across Central and South Texas as Feels-Like Nears 105

Gulf moisture paired with a dry line is pushing heat and humidity.

The threat of severe weather in Central Texas on Sunday will be west of Austin, mainly in the Hill Country. 
Shown are the potential heat index values at 4 p.m. Sunday, according to the National Blend of Models.
On hot days, squirrels like this critter in the Circle C Ranch neighborhood in Southwest Austin, often lie on their bellies and extend their limbs to dissipate body heat. 
Image

Overview

  • The region, which flipped from a cool spell to 90s over the weekend, is forecast to peak Monday and Tuesday with heat index readings near 102 to 105 and a minor to moderate NWS heat risk.
  • Persistent Gulf moisture flowing inland and a dry line, the boundary between dry and humid air, west of I‑35 are driving very humid air that makes it feel hotter than the actual temperature.
  • Rain chances stay low at roughly 10 to 20 percent, yet any isolated storm that forms over the Hill Country or the I‑35 corridor could turn marginally severe with large hail or damaging winds, forecasters warn.
  • A weak front Wednesday may trim a few degrees, and a stronger front Friday into Saturday is likely to bring a marked cooldown to the 70s with morning lows in the 50s.
  • Houston should feel heat index values near 100 while areas west toward San Antonio and Laredo may reach 104 or higher, so people working outside will need extra water and frequent shade breaks.