A weak upper trough drifted south into East Texas and North Louisiana on August 10th, and provided enough large scale forcing for scattered showers and thunderstorms during much of the day across portions of North Louisiana. Ample moisture ahead of this disturbance combined with the weak steering currents aloft focused an area of slow moving thunderstorms across Ouachita Parish in North-central…
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The episode as NWS SHV wrote it up.
A weak upper trough drifted south into East Texas and North Louisiana on August 10th, and provided enough large scale forcing for scattered showers and thunderstorms during much of the day across portions of North Louisiana. Ample moisture ahead of this disturbance combined with the weak steering currents aloft focused an area of slow moving thunderstorms across Ouachita Parish in North-central Louisiana, producing widespread rainfall amounts of one to in excess of two inches. Grounds were already saturated from heavy rainfall of three to four inches that fell the day before on the 9th, with high water reported across multiple streets in Monroe.
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 10, 10:04 AM CST, 54 minutes earlier.
Area Forecast Discussion National Weather Service Shreveport LA 1104 AM CDT Wed Aug 10 2022 ...New UPDATE... .UPDATE... Issued at 1100 AM CDT Wed Aug 10 2022 Given current rainfall and cloud cover, this morning's update is to adjust afternoon high temperatures. Most of our western zones should reach the previously forecast high, but areas east of I-49 will likely be cooler. /44/ && .SHORT TERM... (Wednesday through Thursday) Issued at 309 AM CDT Wed Aug 10 2022 Mostly cloudy and rain cooled lower 70s for much of our area this morning except for portions of deep east and northeast TX where mid to upper 70s reside as usual here lately. One more good chance for some of those rain cooled starts tomorrow as the upper low flares up again with daytime heating. Models have been consistent on 09Z for some new development and right on time we are seeing some pop corn showers right in the heart of our four state area. We will see continued slow movement of convection with more potential for locally heavy episodes with widespread 1 to 2 inch totals and some areas in north LA along I-20 where we could once again double or triple with a few bullseyes. The WPC Excessive Rainfall Outlook for today is indicating a Slight Risk for some flash flooding, especially in those areas with more than 3 inches yesterday. Both Texarkana and Monroe have new daily rainfall records for the 9th. Likewise today has the same potential with slow movement of activity again today. We can expect another wide range of temperatures with more 90s in many locales, but many of the cooler spots this morning will manage to keep the 80s range for a nice change of pace. Our winds will vary around convection, but prevail E/SE today and then back to E/NE for Thursday. /24/ && .LONG TERM... (Thursday Night through Wednesday) Issued at 309 AM CDT Wed Aug 10 2022 By Friday, we will continue to see a weakening trough/shear axis drifting southward through our region which means one more day of scattered convection near and south of the I-20 Corridor on Friday before the shear axis pushes south and west of of our region. Held onto slight chance pops across our southern third for Saturday only but the main story beyond the end of the work week will be the impacts of upper ridging that will expand eastward into the Southern and Central Plains for the upcoming weekend and early next week, resulting in warmer temperatures. Speaking of temperatures, stayed close to NBM numbers Thursday Night through Friday which will be tapered slightly by increased cloud cover/rain chances but look for the warming trend to really begin in earnest by Sunday with highs reaching the upper 90s once again across our western third. Upper 90s are likely across our western two thirds by Monday with triple digit heat once again across at least our western third by Tue into Wed of next week. /13/ && .AVIATION... (12Z TAFS) Issued at 642 AM CDT Wed Aug 10 2022 ArkLaTex terminals will see some IFR-MVFR this morning. The short range models have been looking at some predawn development along I-20 in LA with VCSH now for KSHV and VCTS by 14Z and prevailing for KMLU around 15Z. Our SFC winds are light SE most everywhere except for calm in the fog across S AR. Morning activity will be slow to move, but additional areas with VCTS for mid afternoons hours. Expecting more nocturnal overnight as the upper low moves away from the four state area. /24/ && .PRELIMINARY POINT TEMPS/POPS... SHV 86 73 91 74 / 70 50 60 20 MLU 85 72 88 72 / 80 40 70 20 DEQ 94 71 92 70 / 40 20 20 10 TXK 90 74 91 73 / 60 40 40 10 ELD 88 70 86 70 / 60 50 50 20 TYR 96 75 92 75 / 60 30 40 20 GGG 92 73 92 73 / 70 40 50 20 LFK 93 73 93 73 / 60 40 80 30 && .SHV WATCHES/WARNINGS/ADVISORIES... AR...None. LA...None. OK...None. TX...None. && SHORT TERM...44 LONG TERM....16 AVIATION...44
Hazardous Weather Outlook National Weather Service Shreveport LA 305 AM CDT Wed Aug 10 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>167-111200- 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- 305 AM CDT Wed Aug 10 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...Tonight and tonight. Scattered to numerous showers and thunderstorms will once again be possible across most of the Four State Region today through this evening. Some of these storms could produce strong wind gusts and frequent cloud to ground lighting. Some flooding could occur with any slow moving convection today through this evening, especially across portions of Northern Louisiana into the southern half of Northeast Texas. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Scattered to numerous showers and thunderstorms will continue across the entire Four State Region on Thursday with the highest chances likely near and south of the I-20 Corridor. Thunderstorm chances will begin to taper off on Friday but especially this weekend into early next week. Dangerous heat will likely return early next week, at least across portions of Northeast Texas, Southeast Oklahoma and portions of Southwest Arkansas. .SPOTTER INFORMATION STATEMENT... Activation of emergency management personnel, amateur radio operators, and storm spotters will not be needed through tonight. 13
Special Weather Statement
National Weather Service Shreveport LA
1149 AM CDT Wed Aug 10 2022
LAZ021-022-101730-
Caldwell LA-La Salle LA-
1149 AM CDT Wed Aug 10 2022
...A strong thunderstorm will impact portions of Caldwell and
northeastern La Salle Parishes through 1230 PM CDT...
At 1149 AM CDT, Doppler radar was tracking a strong thunderstorm over
Columbia, moving south at 15 mph.
HAZARD...Winds in excess of 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Columbia, Clarks, Grayson, Spaulding, Riverton, Kelly and Burlington.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 3207 9193 3206 9191 3201 9189 3193 9190
3193 9201 3181 9201 3181 9219 3218 9222
3223 9207 3223 9200 3221 9199 3219 9201
3220 9197 3217 9198 3217 9194 3216 9190
3214 9190 3212 9187 3209 9187
TIME...MOT...LOC 1649Z 346DEG 14KT 3213 9207
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
16The Shreveport radar (KSHV), 160 km away, was scanning. The volume nearest the first event began at 16:55 UTC.
1 flash flood. Local standard time, as filed.
Multiple roads were covered with high water throughout the city of Monroe.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Louisiana in 2022Every state in 2022This day in weather historyWarnings in Louisiana, August 2022
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: 1052491.