textproduct: Shreveport

KEY MESSAGES

Issued at 1134 AM CDT Wed Jun 17 2026

- Post-Tropical Storm Arthur has dissipated and is an area of low pressure along the southeast Texas coast southeast of Houston.

- A Flood Watch remains in effect for portions of central Louisiana through 7pm Thursday evening for heavy rainfall.

- The Flooding threat may seek more of our Four-State area by Friday and through the weekend, as a weak cool front keeps an unsettled weather pattern stuck over the heart of our area.

DISCUSSION

Issued at 1228 AM CDT Thu Jun 18 2026

Midnight readings range in the mid to upper 70s with SE winds at 5 to 10 mph. The dew points are ranging slightly cooler in the low to mid 70s with a little patchy fog expected around daybreak. All the models initialize well with a weakness aloft offshore of Lake Charles around 584dam in a closed low. The surface reflection of Arthur is not closed off and exists as an elongated trough along the near shore and continues to drift east of Trinity and Galveston Bays. The low pressure area is still expected to drift ENE into southern and portions of central Louisiana during Thursday. So our flood watch has been trimmed down to Grant, LaSalle and Caldwell Parishes through the same exportation time of 7pm this evening. This is where the HRRR et al shows the greater coverage of QPF signal and will have the chance to train a weak band(s) over these areas today with only another 1 to 2 inches expected, but due to the antecedent moisture in the soil runoff may be quick in some localized areas.

Outside of the watch area, PoPs are in the slight to chance range with far less QPF expected. Waiting for some of this rainfall will see the heat and humidity build under the subsident mid level dry side of Arthur. This will spike air temps into the mid 90s for many of us and with these high dew points, the Heat index will range above 105 and up to 109 or slightly more where wind may remain light. A Heat Advisory has been posted for our area generally along and west of I-49 and continuing into SE OK and much of Texas generally for the late morning and early evening.

The really good news is that an approaching front may boost the heating today, but will be close enough on Friday to pool this abundant tropical moisture into an excellent likelihood for much more needed rainfall over our remaining drought conditions right where pockets of D3 (extreme) and large areas of D2 (severe) drought remain. The WPC concurs with their ERO for today Slight risk today along the MS River, but also for much of Oklahoma. This area will shift SE into much of our Four-State area for Friday and early on Saturday. QPF expectations are ranging from 2 to 5 inches for days 1-5, and may end many of these harsh areas of drought for us.

Remember the Monday rain event did not see much action north of I-20 and so for now a Flood Watch is not needed along I-30, but that could change in the next day or two as well as adding more areas along and south of I-20. So keep abreast of the forecast for weekend plans in the great outdoors. Flooding will be our greatest threat, so keep that in mind while spending time along our water ways, especially if camping. Weather radio receive all broadcasted storm threat warnings. Plan ahead and check our web site at weather.gov/shv to see the many thumbnails at the page bottom for a host of other information too. The SPC continues their Marginal risk for severe activity amidst scatter to numerous thunderstorms. Rain cooled air falling into hot air on the ground can gust up in a hurry. If Thunder roars, go indoors. We will continue to monitor the threat for flash flooding with ground conditions and the continued slow storm motion into this unsettled period. Father's Day is looking a little quieter. /24/

AVIATION

(12Z TAFS) Issued at 626 AM CDT Thu Jun 18 2026

For the 18/12Z TAF period, ongoing IFR/LIFR ceilings to become VFR by mid-morning, persisting through the evening. MVFR/IFR ceilings to return across most sites except for TXK after 19/06Z. VCSH/VCTS conditions possible across mainly KELD/KMLU today with the remnants of Tropical Storm Arthur. A few lingering showers will be possible across the I-20 terminals after 19/00Z and should dissipate by 19/06Z. Otherwise, S/SE winds around 6 kts or less expected through the period. /05/

SPOTTER INFORMATION STATEMENT

Issued at 1228 AM CDT Thu Jun 18 2026

Spotter activation may be needed today as the remnants of Post- Tropical Storm Arthur drifts nearby cenLA. Reports for excessive, heavy rainfall and any flooding will be appreciated. And likewise, for many locales into this coming weekend, as more heavy rainfall will become possible along a weak slow moving cool front. /24/

PRELIMINARY POINT TEMPS/POPS

SHV 93 78 90 76 / 20 30 60 60 MLU 91 77 90 76 / 60 50 70 60 DEQ 93 74 86 72 / 0 70 60 70 TXK 95 76 89 74 / 10 60 80 70 ELD 91 74 87 73 / 30 50 80 70 TYR 95 79 93 76 / 0 20 50 70 GGG 95 79 92 76 / 10 20 60 60 LFK 96 79 95 77 / 10 0 30 50

SHV WATCHES/WARNINGS/ADVISORIES

AR...Heat Advisory from noon today to 7 PM CDT this evening for ARZ059-070.

LA...Heat Advisory from noon today to 7 PM CDT this evening for LAZ001-002-010-011-017-018.

Flood Watch through this evening for LAZ020>022.

OK...Heat Advisory from noon today to 7 PM CDT this evening for OKZ077.

TX...Heat Advisory from noon today to 7 PM CDT this evening for TXZ096-097-108>112-124>126-136>138-149>153-165>167.