Alert archive / Tennessee / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 232, NWS Huntsville, AL

August 12, 2023Franklin County, Lincoln County, Moore County, Tennessee

NWS Huntsville, AL issued this severe thunderstorm warning at Aug 12, 2023, 1:10 PM CDT for Franklin County, Lincoln County, Moore County, Tennessee. It was in force for 50 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 12, 2023, 1:10 PM CDT (18:10 UTC)
Expired: Aug 12, 2023, 2:00 PM CDT
In force: 50 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Franklin County, TN, Lincoln County, TN, Moore County, TN

The radar

The Northeast Alabama radar (KHTX), 38 km from the middle of the area, began a volume at 18:09 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 12, 10:50 AM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 6.2 hours before the alert went out and 107 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: 2540 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 811 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 120 m²/s²
0-3 km storm-relative helicity: 100 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.3

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 12, 11:15 AM CDT, 1 hour 55 minutes earlier.

Area forecast discussion, Aug 12, 11:15 AM CDT, 1 hour 55 minutes before

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In the hours before

Special weather statement, Aug 12, 1:09 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 11, 7:10 PM CDT	Special Weather Statement	HUN	Cullman	50 min
Aug 12, 1:09 PM CDT	Special Weather Statement	HUN	Madison	36 min
Aug 12, 1:31 PM CDT	Severe Thunderstorm Warning	HUN	Jackson, Madison	29 min
Aug 12, 1:36 PM CDT	Special Weather Statement	HUN	Cullman	39 min
Aug 12, 1:44 PM CDT	Severe Thunderstorm Warning	HUN	Jackson	46 min
Aug 12, 1:59 PM CDT	Special Weather Statement	HUN	Jackson	31 min
Aug 12, 2:10 PM CDT	Special Weather Statement	HUN	Cullman	35 min
Aug 12, 2:26 PM CDT	Excessive Heat Warning	HUN	Colbert, Cullman, Franklin, Lauderdale, Lawrence, Limestone and 3 more	54 hr
Aug 12, 2:26 PM CDT	Heat Advisory	HUN	DeKalb, Jackson	54 hr
Aug 12, 2:28 PM CDT	Severe Thunderstorm Warning	HUN	DeKalb, Jackson	47 min
Aug 12, 2:33 PM CDT	Special Weather Statement	HUN	Marshall	27 min
Aug 12, 2:35 PM CDT	Special Weather Statement	HUN	Marshall	25 min
Aug 12, 2:57 PM CDT	Special Weather Statement	HUN	Marshall	33 min
Aug 12, 2:58 PM CDT	Special Weather Statement	HUN	Marshall	17 min
Aug 12, 3:12 PM CDT	Special Weather Statement	HUN	DeKalb	48 min
Aug 12, 12:31 PM CDT	Severe Thunderstorm Warning	HUN	Franklin, Lincoln, Moore	44 min

Nearby

Severe Thunderstorm Warnings in Tennessee, 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.