Alert archive / Alabama / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 65, NWS Huntsville, AL

May 10, 2008DeKalb County, Jackson County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at May 10, 2008, 12:15 AM CDT for DeKalb County, Jackson County, Alabama. It was in force for 30 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: May 10, 2008, 12:15 AM CDT (05:15 UTC)
Expired: May 10, 2008, 12:45 AM CDT
In force: 30 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon

Counties DeKalb County, AL, Jackson County, AL

The radar

The Northeast Alabama radar (KHTX), 38 km from the middle of the area, began a volume at 05:15 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, 5.3 hours before the alert went out and 180 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: 624 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 1229 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 204 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.1

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 May 9, 8:50 PM CDT, 3 hours 25 minutes earlier.

Area forecast discussion, May 9, 8:50 PM CDT, 3 hours 25 minutes before

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Hazardous weather outlook, May 9, 8:30 PM CDT, 3 hours 45 minutes before

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In the hours before

Local storm report, May 9, 8:07 PM CDT, 4 hours 8 minutes before

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Special weather statement, May 9, 11:55 PM CDT, 20 minutes before

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Special weather statement, May 10, 12:00 AM CDT, 15 minutes before

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Nearby

Severe Thunderstorm Warnings in Alabama, 2008 Every severe thunderstorm warning in 2008

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.