textproduct: Shreveport

DISCUSSION

Issued at 1200 AM CDT Mon Jul 20 2026

Sunday we saw just a taste of this oppressive heat we've been discussing the last several days due in part to weak upper ridging across our region and the fact that dewpoints did not mix down as much as it looked like they were going to during the afternoon. This resulted in more widespread maximum heat indices near or in excess of 105 degrees across most of the region on Sunday. Given the fact that the upper level ridge axis across the Southern Plains will only build south and east into the Middle Red River Valley through the middle part of the work week, went ahead and added to our already existing heat advisory for Monday, expanding the advisory to encompass the remainder of our Four State Region. Look for widespread heat indices by late Monday Morning through early Monday Evening to max out near 108 degrees across most areas. A slight uptick in pwats across our eastern third may be just enough moisture to combine with diurnal heating to produce isolated convection on Monday and Tuesday, again across our eastern zones so added this to the forecast as well.

As the key messages headline above reads, the heat will continue Tuesday and Wednesday with both of these days looking like the hottest of the week with more in the way of triple digit ambient temperatures possible across more of our region. Beyond Wednesday, we should be looking at Tropical Storm Bertha located somewhere off the SE LA Coast and moving westward, paralleling the S LA Coast. There appear to be quite a bit of shear that is poised to influence this tropical system from the northeast and that could keep the northern part of this storm or the inland part of the storm relatively dry across our southern zones as our forecast depicts attm. Likewise, there could be enough mixing and drier air being ingested into the storm that could help to offset heating a bit across our region in the Thu/Fri timeframe. This in spite of a strong upper level ridge remaining in place across the Upper and Middle Red River Valley. Confidence is not high on the slight modification in temperatures by the end of the week as this will depend greatly on the track of tropical system and the strength of this storm. This will continue to be monitored as we go through the upcoming work week.

By next weekend, the upper ridge appear to maybe retrograde back far enough to the west that we could get brushed by a weak upper trough and that could support at least small rain chances across mainly our eastern half in the Friday Night/Saturday timeframe.

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AVIATION

(06Z TAFS) Issued at 1231 AM CDT Mon Jul 20 2026

For the 20/06Z TAFs, mostly clear skies with a few high clouds will prevail overnight. Based on recent performance and expecting similar behavior this morning, added TEMPO groups for VSBY reductions at KLFK and KELD. Fair wx Cu to develop by late morning and early afternoon. Light winds overnight will become southwest to westerly into the daylight hours at sustained speeds of about 5 kts.

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SPOTTER INFORMATION STATEMENT

Issued at 1200 AM CDT Mon Jul 20 2026

Spotter activation is not expected through tonight.

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PRELIMINARY POINT TEMPS/POPS

SHV 96 79 98 80 / 0 0 10 10 MLU 99 79 100 79 / 20 10 20 20 DEQ 95 75 99 76 / 0 0 0 0 TXK 98 78 100 78 / 0 0 10 10 ELD 96 77 100 76 / 10 10 20 20 TYR 97 78 99 80 / 0 0 0 0 GGG 98 78 100 79 / 0 0 0 0 LFK 97 75 99 77 / 0 0 0 0

SHV WATCHES/WARNINGS/ADVISORIES

AR...Heat Advisory from 9 AM this morning to 8 PM CDT this evening for ARZ050-051-059>061-070>073.

LA...Heat Advisory from 9 AM this morning to 8 PM CDT this evening for LAZ001>006-010>014-017>022.

OK...Heat Advisory from 9 AM this morning to 8 PM CDT this evening for OKZ077.

TX...Heat Advisory from 9 AM this morning to 8 PM CDT this evening for TXZ096-097-108>112-124>126-136>138-149>153-165>167.