Alert archive / Alabama / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 128, NWS Huntsville, AL

October 18, 2007Lauderdale County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Oct 18, 2007, 3:54 AM CDT for Lauderdale County, Alabama. It was in force for 36 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: Oct 18, 2007, 3:54 AM CDT (08:54 UTC)
Expired: Oct 18, 2007, 4:30 AM CDT
In force: 36 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon

County Lauderdale County, AL

The radar

The Columbus AFB radar (KGWX), 128 km from the middle of the area, began a volume at 08:58 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, 8.9 hours before the alert went out and 167 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1606 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 127 m²/s²
0-3 km storm-relative helicity: 193 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 Oct 17, 9:45 PM CDT, 6 hours 9 minutes earlier.

Area forecast discussion, Oct 17, 9:45 PM CDT, 6 hours 9 minutes before

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Hazardous weather outlook, Oct 17, 7:18 PM CDT, 8 hours 36 minutes before

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In the hours before

Special weather statement, Oct 18, 3:07 AM CDT, 47 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
Oct 18, 2:52 PM CDT	Tornado Warning	HUN	Lawrence	38 min
Oct 18, 3:27 PM CDT	Tornado Warning	HUN	Lawrence	20 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2007 Every severe thunderstorm warning in 2007

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.