Heat, Harrison
- When
- August 1, 9:00 AM CST to 5:00 PM CST
- Where
- Harrison forecast zone
- Reported by
- ASOS
- Coordinates
- 32.548, -94.371 (the zone’s center; the record gives no point)
A weak cool front began to sink south into Northeast Texas and Southwest Arkansas during the day on August 1st, ahead of an upper level trough of low pressure that shifted southeast through the region. Compressional warming ahead of the front resulted in temperatures climbing into the mid and upper 90s across Lower East Texas and North Louisiana along and south of Interstate 20.
Every event with a place to put it; 11 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS SHV wrote it up.
A weak cool front began to sink south into Northeast Texas and Southwest Arkansas during the day on August 1st, ahead of an upper level trough of low pressure that shifted southeast through the region. Compressional warming ahead of the front resulted in temperatures climbing into the mid and upper 90s across Lower East Texas and North Louisiana along and south of Interstate 20. Low level moisture pooling along the frontal zone did not allow for much mixing of the dewpoints during the afternoon, which when combined with these temperatures, resulted in heat indices ranging from 105-110 degrees.
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 1, 5:03 AM CST, 3 hours 57 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Shreveport LA 603 AM CDT Fri Aug 1 2025 ...New AVIATION... .KEY MESSAGES... Issued at 1120 PM CDT Wed Jul 30 2025 - Scattered to numerous showers and thunderstorms are expected across much of the Four-State area on Friday and Friday night with slow movement along the cold front. Some of NE TX will have a Slight Excessive Risk Outlook through Friday evening and overnight. - High pressure behind the front to bring much cooler temperatures through Tuesday. - Could see a warming trend from midweek onward as the upper- ridge rebuilds. && .DISCUSSION... Issued at 1050 PM CDT Thu Jul 31 2025 An upper-trough lingering across the region from Friday onward into early next week to allow for an unsettled weather pattern across the region with scattered to widespread afternoon showers and thunderstorms each day. A cold front diving south across the region to settle across the northern gulf coast on Friday afternoon bringing some of the highest rain chances of the weekend, mainly along and south of I-20. Increased diurnal mixing will result in sufficient cloud cover and precipitation to keep most of the region out of heat headline criteria, with post-frontal high temperatures on Friday to range from the mid 80s to the mid 90s across most of the region. On Saturday, high temperatures in the upper 80s can be expected areawide. Cold front moving across northeast Texas could tap into high moisture laden air on Friday night potentially generating an MCV from DFW eastward along the I-20 corridor. Locally heavy rainfall may develop as far east as the Tyler/Longview area with 2-3 inch rainfall totals possible over a short period of time. Pattern to remain unchanged through Tuesday with a cooler airmass remaining firmly established across the region limiting high temperatures to the upper 80s to lower 90s with overnight lows in the upper 60s to near 70. Additionally, the lingering upper- trough across the region will continue to provide opportunities for showers and thunderstorms through midweek. By Wednesday into Thursday, upper-level ridging to build east bringing increased subsidence which will allow for hot and dry conditions to return to the ArkLaTex. /05/ && .AVIATION... (12Z TAFS) Issued at 600 AM CDT Fri Aug 1 2025 For the 01/12Z TAF period, VFR conditions largely prevail early this morning with an abundance of mid and upper level convective debris clouds. The lone exception has been KTXK where some patchy fog and low stratus has resulted in intermittent IFR/LIFR cigs. Given the recent heavy rainfall there over the past 12 hours, did maintain TEMPO conditions for the lower cigs/vsby through mid-late morning. Otherwise, any additional fog or low stratus should be rather isolated and mainly confined to areas north of I-20 through mid to late morning with lesser coverage elsewhere. Beyond that, expect another robust cu field to develop with daytime heating and VCTS warranted by early to mid afternoon at nearly all terminals. More focused convection may hold off until late in the period from late this evening into early Saturday morning as a weak cool front continues to sag slowly southward through our airspace. Lgt and vrbl winds will generally prevail through much of the period around 5 kts or less before trending more NEly with fropa. /19/ && .SPOTTER INFORMATION STATEMENT... Issued at 600 AM CDT Fri Aug 1 2025 Spotter activation may be needed this evening and overnight tonight due to the threat of heavy rainfall and flooding, mainly across parts of Northeast Texas. && .PRELIMINARY POINT TEMPS/POPS... SHV 94 74 91 72 / 60 50 60 10 MLU 93 72 91 69 / 60 30 40 10 DEQ 87 69 89 65 / 70 30 30 0 TXK 90 71 91 67 / 60 40 30 0 ELD 88 69 89 65 / 60 30 30 10 TYR 96 72 89 72 / 60 60 60 10 GGG 96 72 89 71 / 60 60 70 10 LFK 96 74 92 73 / 60 60 80 30 && .SHV WATCHES/WARNINGS/ADVISORIES... AR...None. LA...None. OK...None. TX...None. && DISCUSSION...05 AVIATION...19
The national radar mosaic for the moment the first event began.
11 heat. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2025Every state in 2025This day in weather historyWarnings in Texas, August 2025
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: 1284433, 1284434, 1284436, 1284437, 1284440, 1284443, 1284445, 1284446, 1284447, 1284449, 1284451.