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

(12Z TAFS) Issued at 608 AM CDT Tue Aug 18 2026

Some isolated but elevated convection has just recently developed in the vicinity of TXK extending north and east to near Little Rock but cloud bases across SW AR are currently running north of 10kft and like Monday Morning, this activity will likely dissipate shortly after sunrise. Elsewhere, cannot rule out brief IFR ceilings near LFK early this morning but this moisture is very shallow and will likely mix out after sunrise as well. Otherwise, we will wait on daytime heating for a weak AC field to develop near 7-10kft by afternoon before dissipating shortly after sunset.

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