A weak upper trough shifted southeast into the Red River Valley of Southern Oklahoma and Western Arkansas during the morning of August 9th, which focused concentrated areas of showers and thunderstorms as it encountered a hot, very moist, and unstable air mass. These showers and thunderstorms were slow moving, with widespread 2-4+ inches of rain falling over both the Texas and Arkansas sides of…
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The episode as NWS SHV wrote it up.
A weak upper trough shifted southeast into the Red River Valley of Southern Oklahoma and Western Arkansas during the morning of August 9th, which focused concentrated areas of showers and thunderstorms as it encountered a hot, very moist, and unstable air mass. These showers and thunderstorms were slow moving, with widespread 2-4+ inches of rain falling over both the Texas and Arkansas sides of Texarkana, as well as across much of Southwest Arkansas. This resulted in flash flooding across the city of Texarkana, with numerous roads flooded as 3.94 inches of rain fell over the course of a few hours at the Texarkana Regional Airport.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Shreveport, LA wrote its last area forecast discussion before the first event at Aug 9, 11:37 AM CST, 8 minutes earlier.
Area Forecast Discussion National Weather Service Shreveport LA 1237 PM CDT Tue Aug 9 2022 ...New AVIATION... .UPDATE... Issued at 1008 AM CDT Tue Aug 9 2022 No update is needed to the overnight forecast package at this time. /44/ && .SHORT TERM... (Tuesday through Wednesday) Issued at 341 AM CDT Tue Aug 9 2022 Large range of temps this morning with lower 70s in south AR and lots of mid to upper 70s for areas with less rainfall yesterday. The warmest locales reflect the 82 degree soil temp with 81 in Tyler and downtown Shreveport. Not much wind but prevailing will keep southerly, although variation with a few large boundaries is likely in the short term. Our skies are mostly cloudy and the KSHV 88D is showing clusters of slow moving thunderstorms over SE OK and SW AR. Movement of this convection is sinking southward underneath the ever larger upper low, now over E OK. This feature will slowly sink southward as well with locally heavy rainfall at times. Once these areas set up we could update wording for those zones, but widespread flooding is not expected. However, due to the slow movement associated with the weather the next couple of days and night, some flash flooding is not out of the question. And really almost anywhere in our cwa as the Easterlies also have a say with an inverted trough over FL now and moving due west along the Gulf coast over the short term. The WPC has much of our area in their excessive rainfall outlook for day one and then goes ahead an includes east Texas and all of the midSouth for that matter on day two. This could really put a dent in the drought with days 1-3 QPF totaling 1 to 2 inches on a widespread basis. Of course some locales could double or triple that with coverage such as it will be through Wednesday. Obviously, partly cloudy areas today or tomorrow will become warn to hot with low to mid 90s, but many areas may well keep to the mid to upper 80s too. The SPC has a general risk with lightning a real threat anytime and perhaps some gusty winds where good SFC & DCAPE can develop. Last night's balloon sounding was 2848/1212 J/kg respectively and our freezing level and wet bulb are both way up there at this time, so flashing flooding may be only other threat. /24/ && .LONG TERM... (Wednesday Night through Tuesday) Issued at 341 AM CDT Tue Aug 9 2022 Our region will continue to be under the influence of an upper level trough, lodged between an upper level ridge axis across the central Bahamas and a much stronger ridge across the Central Rockies that extends eastward into the Central Plains. This upper level trough, extending from the Ohio Valley into the Tenn Valley and the Lower Miss Valley will continue to provide the necessary forcing along with plentiful moisture for the development of scattered to numerous convection with the highest pops through Friday across our southern half to southern third. We should begin to slowly dry out across our northwest third to half Thursday into Friday and this is due in part to a slight shift eastward to the upper level ridge and its axis out of the Rockies and more into the Central and Southern Plains. By the weekend, the medium range is pretty much void of any semblance of the trough but there will be enough moisture present for isolated to widely scattered, mainly diurnally driven convection near and south of the I-20 Corridor Saturday and mainly south of the corridor on Sunday. The reduction in precipitation chances for the weekend into early next week and the positioning of the upper ridge to our west will result in hotter temperatures with upper 90s likely returning to at least our western half Sunday into Monday of next week. /13/ && .AVIATION... (18Z TAFS) Issued at 1234 PM CDT Tue Aug 9 2022 Showers and thunderstorms will continue to move across the region today, with heavy rain anticipated with some storms. This will result in heavily reduced CIGS and VIS during it's duration. Most terminals are carrying some form of precipitation into tomorrow morning. Additionally, look for widespread MVFR ceilings past 10/12z with the morning cloud deck. /44/ && .PRELIMINARY POINT TEMPS/POPS... SHV 75 90 74 92 / 50 70 30 40 MLU 73 88 72 90 / 40 70 40 50 DEQ 71 91 71 93 / 40 50 20 20 TXK 74 91 74 93 / 60 60 30 20 ELD 70 87 70 87 / 50 70 40 30 TYR 76 93 75 95 / 30 50 30 30 GGG 74 92 73 93 / 40 60 30 30 LFK 75 94 74 95 / 30 50 30 60 && .SHV WATCHES/WARNINGS/ADVISORIES... AR...None. LA...None. OK...None. TX...None. && SHORT TERM...44 LONG TERM....15 AVIATION...44
Hazardous Weather Outlook National Weather Service Shreveport LA 418 AM CDT Tue Aug 9 2022 ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-TXZ096- 097-108>112-124>126-136>138-149>153-165>167-101200- Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette- Columbia-Union-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto- Red River-Bienville-Jackson-Ouachita-Sabine-Natchitoches-Winn-Grant- Caldwell-La Salle-McCurtain-Bowie-Franklin-Titus-Camp-Morris-Cass- Wood-Upshur-Marion-Smith-Gregg-Harrison-Cherokee-Rusk-Panola- Nacogdoches-Shelby-Angelina-San Augustine- 418 AM CDT Tue Aug 9 2022 This Hazardous Weather Outlook is for south central Arkansas, southwest Arkansas, north central Louisiana, northwest Louisiana, southeast Oklahoma, east Texas and northeast Texas. .DAY ONE...Today and tonight. Scattered to numerous thunderstorms will be possible across the Four State Region today through tonight. Some of these storms will be strong, producing strong wind gusts, small hail, cloud to ground lightning and brief heavy downpours. Any severe weather threat today will remain isolated but cannot be totally ruled out. Some flooding could occur with any slow moving convection today through tonight but this too will remain isolated. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Scattered to numerous showers and thunderstorms will continue across the entire Four State Region on Wednesday, before becoming more confined to the I-20 Corridor and points south Thursday into Friday. There could be some strong thunderstorms with this convection but severe thunderstorms are not anticipated at this time. .SPOTTER INFORMATION STATEMENT... Activation of emergency management personnel, amateur radio operators, and storm spotters will not be needed through tonight. 13
The Shreveport radar (KSHV), 117 km away, was scanning. The volume nearest the first event began at 17:44 UTC.
1 flash flood. Local standard time, as filed.
Numerous roads were flooded across both the Texas and Arkansas sides of Texarkana.
After NWS Directive 10-1605, the rules offices file Storm Data by.
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NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1052081.