textproduct: Shreveport

KEY MESSAGES

Issued at 1246 PM CDT Wed Aug 19 2026

- Afternoon high temperatures near or in excess of 100 degrees with heat indices up to 109 will continue throughout the week ahead. a Heat Advisory remains in effect, with extensions likely.

- Showers and thunderstorms will be possible for our north and east tomorrow afternoon. Some storms may be capable of producing damaging wind gusts.

DISCUSSION

Issued at 1246 PM CDT Wed Aug 19 2026

The upper level ridging over the Intermountain West and its attendant high pressure over the Four Corners Region and west Texas will remain parked in place and very much in play throughout the course of this extended forecast period. Afternoon high temperatures are expected to reach and exceed the century mark every afternoon throughout the week ahead, with the "cool" spots reaching the upper 90s. Overnight lows will fall into the middle to upper 70s throughout, with only our northeasternmost zones even having a shot at lower 70s. As of this writing, afternoon dewpoints still look to fall into the upper 60s to lower 70s, resulting in heat indices justifying continuing the Heat Advisory as previously discussed. Any heat indices of 110 or greater will be isolated and short-lived enough to not merit upgrading at this time.

The most consequential synoptic scale factor in the forecast for the days ahead will be the eastward reach of our prevailing high pressure center. Guidance is suggesting a slight retrograde by tomorrow afternoon, opening the door just enough for northwest flow to channel some showers and thunderstorms over the Ozarks and into our southwest Arkansas counties. However, a key source of uncertainty is the pronounced capping present in forecast soundings. If the cap remains substantial enough, we may see little to no rainfall, nevermind storms. However, if uplift manages to break the cap, the developing storms look to exhibit significant potential for downbursts producing strong, damaging wind gusts.

Tomorrow's potential storms will dissipate into the evening hours, before slight chances of showers and storms return to our eastern zones Friday afternoon, with coverage and intensity similarly contingent on the position of our upper level high. Into the weekend ahead, guidance favors a strengthening of the ridge and high, forming a blocking pattern which will sustain the heat as advertised above, while shutting down any significant precip chances through the remainder of this extended forecast period.

/26/

AVIATION

(18Z TAFS) Issued at 1246 PM CDT Wed Aug 19 2026

For the 19/18z TAF period...Expect VFR conditions to prevail during the period, with some afternoon CU and passing cirrus. There could be an exception at KLFK, where models are suggesting some low cigs could come in around daybreak tomorrow. Otherwise, expect winds to remain from the SSW between 5-10 mph, with slightly higher gusts at times. /20/

SPOTTER INFORMATION STATEMENT

Issued at 1246 PM CDT Wed Aug 19 2026

Spotter activation will not be needed through tonight.

PRELIMINARY POINT TEMPS/POPS

SHV 80 104 80 103 / 0 0 10 10 MLU 79 102 78 101 / 0 0 20 20 DEQ 75 104 72 103 / 0 20 30 0 TXK 80 103 77 102 / 0 20 30 0 ELD 78 102 76 101 / 0 10 30 0 TYR 79 103 80 104 / 0 0 10 10 GGG 79 105 79 105 / 0 0 10 10 LFK 76 101 77 102 / 0 0 0 10

SHV WATCHES/WARNINGS/ADVISORIES

AR...Heat Advisory until 8 PM CDT Thursday for ARZ050-051-059>061- 070>073.

LA...Heat Advisory until 8 PM CDT Thursday for LAZ001>006-010>014- 017>022.

OK...Heat Advisory until 8 PM CDT Thursday for OKZ077.

TX...Heat Advisory until 8 PM CDT Thursday for TXZ096-097-108>112- 124>126-136>138-149>153-165>167.