Alert archive / Alabama / Flash Flood Warnings in 2025
Flash Flood Warning 40, NWS Huntsville, AL
NWS Huntsville, AL issued this flash flood warning at Aug 20, 2025, 2:10 PM CDT for Madison County, Alabama. It was in force for 95 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 20, 2025, 2:10 PM CDT (19:10 UTC)
- Expired
- Aug 20, 2025, 3:45 PM CDT
- In force
- 95 min
- Issued by
- NWS Huntsville, AL
- Area
- Storm-based polygon
- Flood severity
- None
County Madison County, AL
The radar
The Northeast Alabama radar (KHTX), 46 km from the middle of the area, began a volume at 19:10 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 7.2 hours before the alert went out and 152 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 250 J/kg
- Mixed-layer CIN
- -152 J/kg
- Mixed-layer LCL
- 1093 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -38 m²/s²
- 0-3 km storm-relative helicity
- 29 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this flash flood warning went out, 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 this flash flood warning went out at Aug 20, 11:01 AM CDT, 3 hours 9 minutes earlier.
Area forecast discussion, Aug 20, 11:01 AM CDT, 3 hours 9 minutes before
Area Forecast Discussion National Weather Service Huntsville AL 1101 AM CDT Wed Aug 20 2025 ...New AVIATION... .NEAR TERM... (Rest of Today and Tonight) Issued at 1002 AM CDT Wed Aug 20 2025 The surface map indicates a cold front has dropped south into KY through southern MO near the position of a weak 5h trough. There is also a weak wedge front lining the lower Appalachians through central GA. Daytime heating will advance instability rather quickly once again today, and expect thunderstorms to develop by midday into early afternoon, especially closer to the frontal boundary to our north, then drop south through the afternoon. Additional development will occur along the higher terrain and perhaps near the wedge front as well, although this boundary is rather diffuse. Gusty to perhaps damaging winds and locally excessive rainfall remain the primary hazards later today. Thunderstorms should dissipate fairly quickly after sunset, although gust front outflows may sustain a few thunderstorms into mid evening. Depending on where the rain falls, patchy dense fog is expected to develop later tonight. && .SHORT TERM... (Thursday through Friday night) Issued at 1002 AM CDT Wed Aug 20 2025 The 5h trough and cold front will slowly drop south into the TN Valley Thursday into Thursday night. This will shift the greatest shower and thunderstorm chances to our south and southeast. But the proximity of the front will maintain low chances in our southeast counties Thursday and again on Friday. Consequently, high temperatures will be slightly cooler in the middle to upper 80s due to more clouds and potential showers and thunderstorms. In northwest AL, highs will be in the lower 90s. With dew points still in the upper 60s to around 70, overnight lows will be close to those values. && .LONG TERM... (Saturday through Tuesday) Issued at 934 PM CDT Tue Aug 19 2025 Through the extended forecast, there will be a daily chance for showers and thunderstorms that give way to lower temperatures. The TN Valley will be stuck in weak troughing at the end of the week into the weekend. A trough axis drifting through the TN Valley will keep low to medium (20-50%) chances for showers and thunderstorms on Saturday. On Saturday, a cold front will slide into the Midwest and Mid MS Valley and on Sunday it will bring one more low end chance (15-30%) of showers and storms as the front moves in. With weak steering flow and elevated PWATS (1.5-1.9"), storms Saturday could produce gusty winds and heavy rainfall that could create localized flooding concerns. Behind this frontal passage, drier air will filter in, bringing a break in the humidity, and rainfall as Monday and Tuesday will be dry. We will see a steady decline in temperatures through the extended, starting with highs in the upper 80s-lower 90s on Saturday and only reaching the lower 80s on Tuesday. By Monday night, lows will only reach the upper 50s to lower 60s, really making it feel like Fall! && .AVIATION... (18Z TAFS) Issued at 1101 AM CDT Wed Aug 20 2025 Scattered TSRA are expected to develop after 18Z, some with +RA and brief gusty winds up to 40kt. The TSRA should dissipate by 01Z with VFR conditions otherwise. Patchy BR/FG may reduce visibility to 5SM or less (MVFR) and perhaps less than 3SM (IFR) in a few areas. Additional ceilings of 020-025agl (MVFR) may develop near a cold front passage after 14Z. && .HUN WATCHES/WARNINGS/ADVISORIES... AL...None. TN...None. && NEAR TERM...17 SHORT TERM....17 LONG TERM....JMS AVIATION...17
In the hours before
Local storm report, Aug 20, 10:30 AM CDT, 3 hours 40 minutes before
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</html>The office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 9:42 PM CDT | Special Weather Statement | HUN | Colbert, Lauderdale | 48 min |
| Aug 20, 1:07 PM CDT | Special Weather Statement | HUN | Madison | 53 min |
| Aug 20, 1:28 PM CDT | Special Weather Statement | HUN | Madison | 47 min |
| Aug 20, 1:34 PM CDT | Severe Thunderstorm Warning | HUN | Madison, Morgan | 41 min |
| Aug 20, 1:57 PM CDT | Special Weather Statement | HUN | Madison | 48 min |
| Aug 20, 2:13 PM CDT | Special Weather Statement | HUN | Madison | 47 min |
| Aug 20, 2:28 PM CDT | Special Weather Statement | HUN | Jackson | 62 min |
| Aug 20, 2:41 PM CDT | Severe Thunderstorm Warning | HUN | Madison | 39 min |
| Aug 20, 3:18 PM CDT | Special Weather Statement | HUN | Jackson | 57 min |
| Aug 20, 3:38 PM CDT | Special Weather Statement | HUN | DeKalb | 67 min |
| Aug 20, 3:44 PM CDT | Tornado Warning | HUN | Jackson | 17 min |
| Aug 20, 3:57 PM CDT | Severe Thunderstorm Warning | HUN | Jackson | 32 min |
| Aug 20, 4:17 PM CDT | Special Weather Statement | HUN | DeKalb | 58 min |
| Aug 20, 4:44 PM CDT | Special Weather Statement | HUN | DeKalb | 61 min |
| Aug 20, 4:59 PM CDT | Flash Flood Warning | HUN | DeKalb | 91 min |
| Aug 20, 5:06 PM CDT | Special Weather Statement | HUN | Lawrence | 39 min |
| Aug 20, 5:34 PM CDT | Special Weather Statement | HUN | Colbert | 41 min |
| Aug 20, 5:47 PM CDT | Severe Thunderstorm Warning | HUN | Colbert, Franklin, Lauderdale, Lawrence | 58 min |
| Aug 20, 6:15 PM CDT | Special Weather Statement | HUN | Colbert | 60 min |
| Aug 20, 6:39 PM CDT | Areal Flood Warning | HUN | Colbert, Franklin, Lauderdale | 96 min |
| Aug 19, 11:27 PM CDT | Special Weather Statement | HUN | Lincoln | 48 min |
| Aug 20, 2:37 PM CDT | Special Weather Statement | HUN | Lincoln | 68 min |
| Aug 20, 2:50 PM CDT | Special Weather Statement | HUN | Franklin | 40 min |
| Aug 20, 3:04 PM CDT | Special Weather Statement | HUN | Moore | 56 min |
| Aug 20, 3:14 PM CDT | Special Weather Statement | HUN | Franklin | 61 min |
| Aug 20, 3:32 PM CDT | Special Weather Statement | HUN | Franklin | 43 min |
| Aug 20, 3:37 PM CDT | Severe Thunderstorm Warning | HUN | Franklin | 53 min |
Nearby
Flash Flood Warnings in Alabama, 2025Every flash flood warning in 2025
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.