Alert archive / Alabama / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 92, NWS Huntsville, AL

August 11, 2013Madison County, Alabama; Lincoln County, Tennessee

NWS Huntsville, AL issued this severe thunderstorm warning at Aug 11, 2013, 6:06 PM CDT for Madison County, Alabama; Lincoln County, Tennessee. It was in force for 24 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 11, 2013, 6:06 PM CDT (23:06 UTC)
Expired
Aug 11, 2013, 6:30 PM CDT
In force
24 min
Issued by
NWS Huntsville, AL
Area
Storm-based polygon

Counties Madison County, AL, Lincoln County, TN

The radar

The Northeast Alabama radar (KHTX), 44 km from the middle of the area, began a volume at 23:07 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, 11.1 hours before the alert went out and 259 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 2013-08-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 441 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 2013-08-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -24 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
441 J/kg
Mixed-layer CIN
-43 J/kg
Mixed-layer LCL
809 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
-24 m²/s²
0-3 km storm-relative helicity
-25 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 11, 3:10 PM CDTSpecial Weather StatementHUNColbert50 min
Aug 11, 3:46 PM CDTSpecial Weather StatementHUNColbert, Lauderdale44 min
Aug 11, 3:57 PM CDTSpecial Weather StatementHUNLimestone33 min
Aug 11, 4:34 PM CDTSpecial Weather StatementHUNLimestone41 min
Aug 11, 5:05 PM CDTSpecial Weather StatementHUNLimestone25 min
Aug 11, 5:13 PM CDTFlash Flood WarningHUNColbert, Lauderdale, Lawrence, Limestone3 hr
Aug 11, 5:25 PM CDTSpecial Weather StatementHUNJackson50 min
Aug 11, 5:37 PM CDTSpecial Weather StatementHUNMadison, Morgan23 min
Aug 11, 5:54 PM CDTSpecial Weather StatementHUNMadison36 min
Aug 11, 5:58 PM CDTSpecial Weather StatementHUNMadison, Morgan32 min
Aug 11, 6:24 PM CDTSevere Thunderstorm WarningHUNMadison36 min
Aug 11, 6:56 PM CDTSpecial Weather StatementHUNFranklin49 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2013Severe Thunderstorm Warnings in Tennessee, 2013Every severe thunderstorm warning in 2013

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.