textproduct: Shreveport

KEY MESSAGES

Issued at 400 PM CDT Thu Jun 18 2026

- A Flood Watch will remain in effect for portions of East Central Louisiana through 7pm this evening, as the Remnants of Tropical Cyclone Arthur continues to shift eastward out of the region.

- Widespread rain chances will return tomorrow and over the upcoming weekend, as a few disturbances move across the region. - A flooding threat could also develop Friday into the upcoming weekend, along with a chance for strong to severe weather. Damaging winds look to be the primary threat.

DISCUSSION

Issued at 400 PM CDT Thu Jun 18 2026

The remnants of Tropical Cyclone Arthur continues to spin across the Ark-La-Miss region this afternoon. A strong convergence band in association with Arthur developed just south of our forecast zones today across East-Central Louisiana. Over 20" of rainfall has been reported in some portions of Avoyelles Parish, where most of the convected bands have trained today. Short-term progs and radar trends are starting to push this band northward, which could get precipitation at Grant, LaSalle, and southern Natchitoches parishes this afternoon and evening, before the remnants of Arthur slowly shift eastward out the region tonight. A Flood Watch remains in effect for Grant, LaSalle, and Caldwell parishes through 7 pm this evening.

Overnight, our attention will shift to our next weather maker for Friday into the upcoming weekend. Upper ridging is expected to develop across the Southwest CONUS into western Texas. This will result in the flow aloft becoming northwesterly, as a long wave trough pushes southward into the region just before daybreak. A potent short-wave will develop along the flow across North Texas and Southern Oklahoma. In fact, progs have this short-wave trough closing off. This will slow the ESE movement of the trough, keeping widespread rain chances over the area through Saturday evening, as the short-wave finally exits North Louisiana. The Storm Prediction Center has highlighted most of the area with a Marginal Risk on Friday, as damaging winds can't be ruled out with this convection. Rain chances will remain in the forecast on Sunday, as another disturbance is expected to move across the region.

The aforementioned upper ridge will flatten out and expand eastward into the Southern Plains and Lower Mississippi Valley for the first of next week. The long-wave trough over the region will shift north of I-20, with flow aloft becoming more zonal. Rain chances will remain for areas along and north of I-20 Monday and Tuesday as additional disturbances move along the flow. Can't rule out the need for additional heat advisories during this period, mainly south of I-20, where the the lack of rainfall will allow temperatures to climb into the mid 90s. The ridge will retrograde back into the SW CONUS during the middle of next week, bringing a return of northwest flow with embedded disturbances, and widespread rain chances. One thing of note, with all of the recent and expected rainfall, drought conditions should improve across the area. However, soils are starting to become saturated, which could result in flooding concerns going forward. /20/

AVIATION

(18Z TAFS) Issued at 144 PM CDT Thu Jun 18 2026

For the 18/18Z TAF update, another round of VCSH/VCTS/-SHRA is expected to return by the end of the period with MVFR/IFR vis/cigs. Until then, the remnants of Tropical Storm Arthur are producing some -RA and MVFR across the far eastern airspace with light northerly and easterly winds. VFR cigs and light winds are in place elsewhere. /16/

SPOTTER INFORMATION STATEMENT

Issued at 400 PM CDT Thu Jun 18 2026

Spotter activation could be needed on Friday.

PRELIMINARY POINT TEMPS/POPS

SHV 78 90 76 88 / 40 60 60 60 MLU 77 88 75 88 / 40 60 60 60 DEQ 74 86 71 86 / 50 60 60 60 TXK 76 85 73 86 / 50 60 60 60 ELD 75 85 72 85 / 50 60 60 60 TYR 78 90 75 88 / 40 50 70 60 GGG 78 90 75 89 / 40 60 70 60 LFK 79 94 77 91 / 10 40 60 50

SHV WATCHES/WARNINGS/ADVISORIES

AR...Heat Advisory until 7 PM CDT this evening for ARZ059-070.

LA...Heat Advisory until 7 PM CDT this evening for LAZ001-002-010-011- 017-018.

Flood Watch until 7 PM CDT this evening for LAZ020>022.

OK...Heat Advisory until 7 PM CDT this evening for OKZ077.

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