textproduct: Shreveport

KEY MESSAGES

Issued at 1124 AM CDT Tue Aug 18 2026

- Temperatures nearing or exceeding triple digits will continue through this week, maintaining an elevated risk for heat- related illnesses.

- Increasingly dry soils and parched vegetation resulting from flash drought will support an increased fire weather threat. - Although rain will be hard to come by, a few opportunities will exist for isolated convection over the next week as the upper ridge axis retrogrades slightly farther west.

DISCUSSION

Issued at 1124 AM CDT Tue Aug 18 2026

The upper-level ridge that has been keeping things warm and dry will begin to retrograde toward the Four Corners Region this afternoon. Even with the movement of this ridge, warm temperatures don't budge much. Afternoon highs in the upper 90s to low 100s are expected to stick around through the forecast period. One aspect of the forecast that could be much worse are the heat indices. The last several days have been mixing down quite well, with afternoon Td's falling as low as the low 60s in places. This is keeping the heat indices in the 105-109 range as opposed to Extreme Heat Warning criteria of 110+. Assuming the mixing trend continues, we should be fine with the prevailing Heat Advisory but we will continue to reevaluate with each forecast cycle.

The retrograding trough will bring northwest flow back to the region by late this week. This could open the door for a front to move southward sometime late Fri/Sat. There is some significant differences between long-range models about the strength of this front, with the GFS advertising a stronger and wetter FROPA than the weaker and drier Euro. The NBM is skewed more toward the Euro and, even still, has some PoPs in our southern zones early Saturday morning. The solution with rainfall could provide a brief relief from the heat and dry conditions if it comes to pass. We'll continue to monitor model trends and hope for some rain.

After the front moves through Saturday morning, the forecast will unfortunately return to our previous hot conditions with no rain for the foreseeable future.

AVIATION

(00Z TAFS) Issued at 622 PM CDT Tue Aug 18 2026

For the 19/00z TAF update...Radar imagery is showing some very isolated convection across portions of south and central Arkansas as well as in central Louisiana. At this time I don't think any of this activity will impact any of our terminals so I have left any mention out at this time and just maintained BKN250. VFR conditions will prevail throughout this period and winds will generally be below 10kts. /33/

SPOTTER INFORMATION STATEMENT

Issued at 1124 AM CDT Tue Aug 18 2026

Spotter activation is not expected at this time, but report any wildfire activity to first responders.

PRELIMINARY POINT TEMPS/POPS

SHV 81 103 81 103 / 10 0 0 0 MLU 79 102 79 101 / 20 0 0 10 DEQ 75 105 75 103 / 0 0 0 10 TXK 80 103 80 102 / 10 0 0 10 ELD 78 101 78 101 / 20 0 0 0 TYR 80 102 79 103 / 0 0 0 0 GGG 79 103 79 104 / 0 0 0 0 LFK 77 99 76 101 / 0 0 0 0

SHV WATCHES/WARNINGS/ADVISORIES

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

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

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

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