Alert archive / Alabama / Flash Flood Warnings in 2023

Flash Flood Warning 26, NWS Huntsville, AL

August 28, 2023Madison County, Alabama

NWS Huntsville, AL issued this flash flood warning at Aug 28, 2023, 8:09 AM CDT for Madison County, Alabama. It was in force for 105 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 28, 2023, 8:09 AM CDT (13:09 UTC)
Expired
Aug 28, 2023, 9:54 AM CDT
In force
105 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 13:13 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 1.2 hours before the alert went out and 244 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.

Skew-T log-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 12:00Z on 2023-08-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 966 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 12:00Z on 2023-08-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 128 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
966 J/kg
Mixed-layer CIN
-69 J/kg
Mixed-layer LCL
627 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
128 m²/s²
0-3 km storm-relative helicity
125 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Huntsville, AL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 27, 7:05 PM CDTSpecial Weather StatementHUNMarshall25 min
Aug 28, 7:58 AM CDTSpecial Weather StatementHUNMadison62 min
Aug 28, 2:17 PM CDTSpecial Weather StatementHUNDeKalb43 min
Aug 28, 3:55 PM CDTSpecial Weather StatementHUNDeKalb50 min
Aug 28, 5:08 PM CDTSpecial Weather StatementHUNDeKalb52 min
Aug 28, 5:13 PM CDTSpecial Weather StatementHUNMadison47 min
Aug 28, 5:29 PM CDTFlash Flood WarningHUNJackson, Madison3 hr
Aug 28, 6:51 PM CDTSpecial Weather StatementHUNJackson39 min
Aug 27, 7:15 PM CDTSpecial Weather StatementHUNFranklin30 min

Nearby

Flash Flood Warnings in Alabama, 2023Every flash flood warning in 2023

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.