Alert archive / Alabama / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 133, NWS Huntsville, AL
NWS Huntsville, AL issued this severe thunderstorm warning at May 13, 2011, 6:40 PM CDT for Colbert County, Lauderdale County, Alabama. 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
- May 13, 2011, 6:40 PM CDT (23:40 UTC)
- Expired
- May 13, 2011, 7:30 PM CDT
- In force
- 50 min
- Issued by
- NWS Huntsville, AL
- Area
- Storm-based polygon
Counties Colbert County, AL, Lauderdale County, AL
The radar
The Columbus AFB radar (KGWX), 115 km from the middle of the area, began a volume at 23:40 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 |
|---|---|---|---|
| May 13, 5:54 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Nashville Metro, TN (KBNA), launched 12:00Z, 11.7 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.
- Mixed-layer CAPE
- 1225 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 983 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 35 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
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 13, 2:06 PM CDT, 4 hours 34 minutes earlier.
Area forecast discussion, May 13, 2:06 PM CDT, 4 hours 34 minutes before
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</html>Hazardous weather outlook, May 13, 6:11 PM CDT, 29 minutes before
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Special weather statement, May 13, 12:47 PM CDT, 5 hours 53 minutes before
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</html>The office that day
Everything else NWS Huntsville, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 13, 10:04 AM CDT | Special Weather Statement | HUN | Cullman | 26 min |
| May 13, 10:15 AM CDT | Severe Thunderstorm Warning | HUN | Cullman | 45 min |
| May 13, 11:00 AM CDT | Special Weather Statement | HUN | Cullman | 30 min |
| May 13, 11:07 AM CDT | Special Weather Statement | HUN | Jackson | 23 min |
| May 13, 11:23 AM CDT | Severe Thunderstorm Warning | HUN | Marshall | 37 min |
| May 13, 11:31 AM CDT | Special Weather Statement | HUN | Jackson | 44 min |
| May 13, 11:54 AM CDT | Severe Thunderstorm Warning | HUN | DeKalb, Marshall | 36 min |
| May 13, 12:27 PM CDT | Severe Thunderstorm Warning | HUN | DeKalb | 18 min |
| May 13, 12:47 PM CDT | Special Weather Statement | HUN | DeKalb | 28 min |
Nearby
Severe Thunderstorm Warnings in Alabama, 2011Every severe thunderstorm warning in 2011
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.