Alert archive / Alabama / Tornado Warnings in 2023

Tornado Warning 38, NWS Huntsville, AL

August 7, 2023DeKalb County, Alabama

NWS Huntsville, AL issued this tornado warning at Aug 7, 2023, 3:31 PM CDT for DeKalb County, Alabama. It was in force for 12 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 7, 2023, 3:31 PM CDT (20:31 UTC)
Expired: Aug 7, 2023, 3:43 PM CDT
In force: 12 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County DeKalb County, AL

The radar

The Northeast Alabama radar (KHTX), 58 km from the middle of the area, began a volume at 20:32 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 7, 10:40 AM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 8.5 hours before the alert went out and 168 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: 2377 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 1025 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 108 m²/s²
0-3 km storm-relative helicity: 112 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 10.7

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this tornado 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 tornado warning went out at Aug 7, 2:28 PM CDT, 1 hour 3 minutes earlier.

Area forecast discussion, Aug 7, 2:28 PM CDT, 1 hour 3 minutes before

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In the hours before

Special weather statement, Aug 7, 12:40 PM CDT, 2 hours 51 minutes before

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Special weather statement, Aug 7, 1:02 PM CDT, 2 hours 29 minutes before

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Special weather statement, Aug 7, 1:30 PM CDT, 2 hours 1 minute before

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Special weather statement, Aug 7, 2:27 PM CDT, 1 hour 4 minutes before

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Special weather statement, Aug 7, 2:28 PM CDT, 1 hour 3 minutes before

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Special weather statement, Aug 7, 2:58 PM CDT, 33 minutes 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 7, 10:00 AM CDT	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale	30 min
Aug 7, 10:28 AM CDT	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale	32 min
Aug 7, 10:54 AM CDT	Special Weather Statement	HUN	Limestone	51 min
Aug 7, 11:11 AM CDT	Special Weather Statement	HUN	Colbert	49 min
Aug 7, 11:45 AM CDT	Special Weather Statement	HUN	Colbert, Lauderdale	45 min
Aug 7, 11:47 AM CDT	Special Weather Statement	HUN	Madison	43 min
Aug 7, 12:05 PM CDT	Severe Thunderstorm Warning	HUN	Jackson, Madison	25 min
Aug 7, 12:08 PM CDT	Severe Thunderstorm Warning	HUN	Jackson, Madison, Marshall	37 min
Aug 7, 12:09 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale	17 min
Aug 7, 12:27 PM CDT	Special Weather Statement	HUN	Lauderdale	48 min
Aug 7, 12:31 PM CDT	Severe Thunderstorm Warning	HUN	Jackson	32 min
Aug 7, 12:40 PM CDT	Special Weather Statement	HUN	Colbert, Lauderdale	50 min
Aug 7, 1:09 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Franklin	36 min
Aug 7, 1:30 PM CDT	Special Weather Statement	HUN	Limestone, Madison	45 min
Aug 7, 1:35 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Franklin, Lawrence	25 min
Aug 7, 1:57 PM CDT	Severe Thunderstorm Warning	HUN	Cullman, Lawrence, Morgan	33 min
Aug 7, 2:27 PM CDT	Special Weather Statement	HUN	Cullman, Morgan	48 min
Aug 7, 2:28 PM CDT	Special Weather Statement	HUN	DeKalb	32 min
Aug 7, 2:58 PM CDT	Special Weather Statement	HUN	DeKalb, Marshall	62 min
Aug 7, 3:17 PM CDT	Severe Thunderstorm Warning	HUN	DeKalb, Marshall	28 min
Aug 7, 11:07 AM CDT	Special Weather Statement	HUN	Lincoln, Moore	38 min

Nearby

Tornado Warnings in Alabama, 2023 Every tornado warning in 2023 Tornadoes 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.