Alert archive / Alabama / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 239, NWS Huntsville, AL

August 13, 20235 counties in Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Aug 13, 2023, 4:11 PM CDT for 5 counties in Alabama. It was in force for 49 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 13, 2023, 4:11 PM CDT (21:11 UTC)
Expired: Aug 13, 2023, 5:00 PM CDT
In force: 49 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Colbert County, AL, Franklin County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL

The radar

The Columbus AFB radar (KGWX), 114 km from the middle of the area, began a volume at 21:13 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 13, 1:35 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.2 hours before the alert went out and 182 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 64 J/kg
Mixed-layer CIN: -109 J/kg
Mixed-layer LCL: 864 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Aug 13, 2:37 PM CDT, 1 hour 34 minutes earlier.

Area forecast discussion, Aug 13, 2:37 PM CDT, 1 hour 34 minutes before

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In the hours before

Special weather statement, Aug 13, 3:11 PM CDT, 1 hour before

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Special weather statement, Aug 13, 3:32 PM CDT, 39 minutes before

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Special weather statement, Aug 13, 3:35 PM CDT, 36 minutes before

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Special weather statement, Aug 13, 3:57 PM CDT, 14 minutes before

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Local storm report, Aug 13, 4:08 PM CDT, 3 minutes before

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Local storm report, Aug 13, 4:10 PM CDT, 1 minute before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 13, 7:53 AM CDT	Dense Fog Advisory	HUN	Jackson	2 hr
Aug 13, 2:52 PM CDT	Special Weather Statement	HUN	Jackson	38 min
Aug 13, 3:08 PM CDT	Special Weather Statement	HUN	Colbert	52 min
Aug 13, 3:11 PM CDT	Special Weather Statement	HUN	Morgan	34 min
Aug 13, 3:18 PM CDT	Severe Thunderstorm Warning	HUN	DeKalb	14 min
Aug 13, 3:35 PM CDT	Special Weather Statement	HUN	DeKalb	40 min
Aug 13, 3:45 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale, Lawrence	30 min
Aug 13, 3:57 PM CDT	Special Weather Statement	HUN	Colbert	48 min
Aug 13, 4:13 PM CDT	Special Weather Statement	HUN	Madison	32 min
Aug 13, 4:29 PM CDT	Severe Thunderstorm Warning	HUN	Limestone, Madison	31 min
Aug 13, 4:31 PM CDT	Special Weather Statement	HUN	Jackson	29 min
Aug 13, 4:55 PM CDT	Special Weather Statement	HUN	Jackson	35 min
Aug 13, 4:55 PM CDT	Severe Thunderstorm Warning	HUN	Jackson, Madison	35 min
Aug 13, 5:11 PM CDT	Special Weather Statement	HUN	Morgan	49 min
Aug 13, 5:16 PM CDT	Special Weather Statement	HUN	Marshall	29 min
Aug 13, 5:25 PM CDT	Severe Thunderstorm Warning	HUN	DeKalb, Jackson	50 min
Aug 13, 5:36 PM CDT	Severe Thunderstorm Warning	HUN	Marshall	24 min
Aug 13, 5:49 PM CDT	Special Weather Statement	HUN	DeKalb, Marshall	41 min
Aug 13, 5:57 PM CDT	Special Weather Statement	HUN	Cullman	48 min
Aug 13, 6:28 PM CDT	Special Weather Statement	HUN	DeKalb	47 min
Aug 13, 3:32 PM CDT	Special Weather Statement	HUN	Lincoln	28 min
Aug 13, 3:55 PM CDT	Severe Thunderstorm Warning	HUN	Lincoln, Moore	50 min
Aug 13, 4:41 PM CDT	Severe Thunderstorm Warning	HUN	Franklin, Lincoln, Moore	49 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2023 Every severe thunderstorm 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.