Isolated flash flooding in southern middle Tennessee.
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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 HUN wrote it up.
Isolated flash flooding in southern middle Tennessee.
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 Huntsville, AL wrote its last area forecast discussion before the first event at Aug 13, 3:58 AM CST, 3 hours 19 minutes earlier.
Area Forecast Discussion National Weather Service Huntsville AL 458 AM CDT Wed Aug 13 2025 ...New AVIATION... .NEAR TERM... (Today) Issued at 235 AM CDT Wed Aug 13 2025 Slow moving clusters of heavy thunderstorms have expanded across middle into southwest TN. A small isolated thunderstorm has also developed in west central Madison County in AL. The ARW seems to have the best handle of the CAMs that I have looked at so far. This depicts an increase in bands of showers and thunderstorms toward daybreak into the morning hours over north AL into southern middle TN. Given PW values and slow movement, locally excessive rainfall may develop today and the Day 1 ERO is Marginal for most of our forecast area, with a slice of DeKalb County in a Slight Risk. Will hold off on a Flash Flood Watch for now, but will watch trends closely this morning. Previous Discussion... Issued at 1041 PM CDT Tue Aug 12 2025 In wake of the showers and storms that developed earlier in the afternoon, tranquil conditions are prevailing across the Tennessee Valley. Expect cloud cover to persist for most of the overnight period, with model soundings hinting at the redevelopment of some low stratus. In addition, with a passing shortwave overnight, at least some low chances for light precipitation was maintained in the forecast late tonight into the early morning hours on Wednesday. With a broad area of low pressure meandering northward across the Deep South and Tennessee, expect a similar day on Wednesday -- with medium-high (60-80%) chances for showers and storms in the afternoon/evening hours. Locally heavy rainfall and minor flooding concerns will be the main threats in locations that receive repeated rainfall due to the slow movement of this activity. Otherwise, cloud cover will persist through most of the day, tempering highs somewhat during the day. Still, enough breaks will develop to help most locations reach the 85-90 degree range by afternoon. && .SHORT TERM... (Tonight through Friday) Issued at 1041 PM CDT Tue Aug 12 2025 With the aforementioned area of low pressure remaining along the northern Gulf Coast, expect more of the same on Thursday -- though PoPs may be a tad lower. Plenty of cloud cover and at least medium chances for showers and storms should keep temperatures at least near seasonable levels in the upper 80s to lower 90s. Locally heavy rainfall and minor flooding issues will again be the main concern with this activity. A stout area of high pressure will begin to build eastward from the Mid South region on Friday, resulting in a warmer and considerably drier forecast. Though there will be plenty of moisture underneath this ridge, strong subsidence will largely suppress convection and have capped PoPs at 20%. Heat will begin to become more a concern with highs will reach the low to mid 90s, with heat index values just above 100 degrees in some locations. && .LONG TERM... (Friday night through Tuesday) Issued at 1041 PM CDT Tue Aug 12 2025 A strong area of high pressure will remain the dominant weather feature across the Tennessee Valley this weekend into early next week. Subsidence from the ridge will largely suppress convection and cloud cover. As a result, high temperatures will return to the low to mid 90s each day, with a few locations potentially reaching the upper 90s by Sunday/Monday. The combination of these very warm temperatures and dewpoints in the low to mid 70s, will create heat index values between 100-105 degrees across much of the area, including several locations above 105 degrees. This will create moderate to major heat impacts during this window. Heat Advisory products may be needed for portions of the area during this time frame, particularly in northwest/north central Alabama and those with plans this weekend should keep heat safety tips on their mind. && .AVIATION... (12Z TAFS) Issued at 457 AM CDT Wed Aug 13 2025 Low ceilings at or below 010agl (IFR) have developed. Also, multiple clusters of +SHRA and a few TS have also developed and should continue to expand this morning. Ceilings will climb through the 010-020agl (MVFR) range by 15Z and above 030agl by 17Z with a return to VFR. However, scattered to numerous SHRA and TSRA will persist into the afternoon hours. && .HUN WATCHES/WARNINGS/ADVISORIES... AL...None. TN...None. && NEAR TERM...17 SHORT TERM....70 LONG TERM....AMP AVIATION...17
Special Weather Statement
National Weather Service Huntsville AL
645 AM CDT Wed Aug 13 2025
ALZ009-TNZ076-096-097-131300-
Jackson AL-Franklin TN-Moore TN-Lincoln TN-
645 AM CDT Wed Aug 13 2025
...A STRONG THUNDERSTORM WILL IMPACT NORTH CENTRAL JACKSON...
SOUTHEASTERN MOORE...SOUTHEASTERN LINCOLN AND FRANKLIN COUNTIES
THROUGH 800 AM CDT...
At 643 AM CDT, Doppler radar was tracking a cluster of heavy
thunderstorms centered near Huntland, or 12 miles southwest of
Winchester, moving northeast at 10 mph. This will merge with other
thunderstorms and showers over northeast Franklin County.
HAZARD...Rainfall of 1 to 2 inches per hour will occur in these
areas.
SOURCE...Radar indicated.
IMPACT...Significant ponding of water and minor street flooding.
Locations impacted include...
Winchester, Decherd, Estill Springs, Cowan, Huntland, Sewanee, Tims
Ford Lake, Anderson, Lexie Crossroads, and Jericho.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 3534 8603 3531 8600 3532 8598 3528 8591
3523 8587 3495 8586 3494 8626 3495 8628
3494 8629 3497 8629 3498 8631 3499 8631
3499 8638 3510 8637 3534 8624 3535 8622
3533 8620 3536 8616
TIME...MOT...LOC 1143Z 228DEG 11KT 3504 8622
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...30 MPHThe Northeast Alabama radar (KHTX), 42 km away, was scanning. The volume nearest the first event began at 13:19 UTC.
3 flash flood. Local standard time, as filed.
Six to eight inches of water reported over Damron Road on Winchester Highway. Road is barricaded.
Six to eight inches of water covering Henshaw Road at Winchester Highway. Road is barricaded.
Eight to twelve inches of water covering Wagon Road at Sarvis Branch Road. Water up to the bottom of car doors.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Tennessee in 2025Every state in 2025This day in weather historyWarnings in Tennessee, 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: 1288672, 1288673, 1288674.