Alert archive / Alabama / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 78, NWS Huntsville, AL

June 30, 2013Lawrence County, Morgan County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Jun 30, 2013, 9:19 PM CDT for Lawrence County, Morgan County, Alabama. It was in force for 26 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
Jun 30, 2013, 9:19 PM CDT (02:19 UTC)
Expired
Jun 30, 2013, 9:45 PM CDT
In force
26 min
Issued by
NWS Huntsville, AL
Area
Storm-based polygon

Counties Lawrence County, AL, Morgan County, AL

The radar

The Northeast Alabama radar (KHTX), 104 km from the middle of the area, began a volume at 02:20 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 00:00Z, 2.3 hours before the alert went out and 188 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, Nashville Metro, TN at 00:00Z on 2013-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 478 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, Nashville Metro, TN at 00:00Z on 2013-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 square meters per square second.1939587897Sfc1 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
478 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
1350 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-7 m²/s²
0-3 km storm-relative helicity
81 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
Jun 30, 7:20 PM CDTSpecial Weather StatementHUNCullman25 min
Jun 30, 7:35 PM CDTSpecial Weather StatementHUNMorgan25 min
Jun 30, 8:42 PM CDTSpecial Weather StatementHUNMorgan33 min
Jun 30, 8:53 PM CDTSpecial Weather StatementHUNLawrence37 min
Jun 30, 9:13 PM CDTSpecial Weather StatementHUNMorgan32 min
Jul 1, 5:03 PM CDTSpecial Weather StatementHUNJackson27 min
Jun 30, 7:13 PM CDTSpecial Weather StatementHUNLincoln32 min
Jun 30, 7:44 PM CDTSpecial Weather StatementHUNMoore31 min
Jul 1, 4:25 PM CDTSpecial Weather StatementHUNFranklin35 min
Jul 1, 4:40 PM CDTSpecial Weather StatementHUNFranklin20 min
Jul 1, 4:51 PM CDTSpecial Weather StatementHUNMoore24 min
Jul 1, 5:18 PM CDTSpecial Weather StatementHUNFranklin27 min

Nearby

Severe Thunderstorm Warnings in Alabama, 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.