Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 220, NWS Huntsville, AL

June 24, 20114 counties in Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Jun 24, 2011, 2:00 PM CDT for 4 counties in Alabama. It was in force for 45 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: Jun 24, 2011, 2:00 PM CDT (19:00 UTC)
Expired: Jun 24, 2011, 2:45 PM CDT
In force: 45 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon

Counties Lawrence County, AL, Limestone County, AL, Madison County, AL, Morgan County, AL

The radar

The Northeast Alabama radar (KHTX), 83 km from the middle of the area, began a volume at 19:01 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
Jun 24, 1:49 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 7.0 hours before the alert went out and 163 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: 1692 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 755 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 44 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 Jun 24, 1:56 PM CDT, 4 minutes earlier.

Area forecast discussion, Jun 24, 1:56 PM CDT, 4 minutes before

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Hazardous weather outlook, Jun 24, 4:14 AM CDT, 9 hours 46 minutes before

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In the hours before

Special weather statement, Jun 24, 12:11 PM CDT, 1 hour 49 minutes before

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Special weather statement, Jun 24, 12:28 PM CDT, 1 hour 32 minutes before

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Local storm report, Jun 24, 1:05 PM CDT, 55 minutes before

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Special weather statement, Jun 24, 1:06 PM CDT, 54 minutes before

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Special weather statement, Jun 24, 1:34 PM CDT, 26 minutes before

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Local storm report, Jun 24, 2:00 PM CDT, 0 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
Jun 24, 12:28 PM CDT	Special Weather Statement	HUN	Limestone	32 min
Jun 24, 12:35 PM CDT	Severe Thunderstorm Warning	HUN	Lawrence, Limestone, Morgan	40 min
Jun 24, 12:53 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale, Lawrence	52 min
Jun 24, 1:21 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Lawrence, Limestone, Morgan	39 min
Jun 24, 1:34 PM CDT	Special Weather Statement	HUN	Jackson	41 min
Jun 24, 1:43 PM CDT	Severe Thunderstorm Warning	HUN	Madison	47 min
Jun 24, 1:47 PM CDT	Severe Thunderstorm Warning	HUN	Jackson	43 min
Jun 24, 2:15 PM CDT	Severe Thunderstorm Warning	HUN	Morgan	30 min
Jun 24, 2:22 PM CDT	Special Weather Statement	HUN	Colbert, Franklin, Lawrence	23 min
Jun 24, 2:31 PM CDT	Severe Thunderstorm Warning	HUN	Cullman, Jackson, Madison, Marshall, Morgan	44 min
Jun 24, 2:40 PM CDT	Special Weather Statement	HUN	Franklin	35 min
Jun 24, 2:42 PM CDT	Special Weather Statement	HUN	Jackson	33 min
Jun 24, 2:48 PM CDT	Severe Thunderstorm Warning	HUN	Franklin	27 min
Jun 24, 2:59 PM CDT	Special Weather Statement	HUN	Lawrence	46 min
Jun 24, 3:11 PM CDT	Tornado Warning	HUN	Jackson	18 min
Jun 24, 3:18 PM CDT	Special Weather Statement	HUN	Franklin	27 min
Jun 24, 3:22 PM CDT	Severe Thunderstorm Warning	HUN	DeKalb, Jackson, Marshall	38 min
Jun 24, 3:36 PM CDT	Special Weather Statement	HUN	Lawrence	39 min
Jun 24, 3:39 PM CDT	Special Weather Statement	HUN	Morgan	36 min
Jun 24, 3:46 PM CDT	Severe Thunderstorm Warning	HUN	Cullman, Morgan	29 min
Jun 24, 4:07 PM CDT	Special Weather Statement	HUN	Cullman	23 min
Jun 24, 4:15 PM CDT	Special Weather Statement	HUN	Morgan	45 min
Jun 24, 4:17 PM CDT	Special Weather Statement	HUN	Marshall	28 min
Jun 24, 4:24 PM CDT	Severe Thunderstorm Warning	HUN	Cullman	36 min
Jun 24, 4:29 PM CDT	Special Weather Statement	HUN	Franklin	31 min
Jun 24, 4:33 PM CDT	Severe Thunderstorm Warning	HUN	Marshall	27 min
Jun 24, 4:59 PM CDT	Special Weather Statement	HUN	Marshall	31 min
Jun 24, 5:00 PM CDT	Special Weather Statement	HUN	Cullman	30 min
Jun 24, 12:11 PM CDT	Special Weather Statement	HUN	Franklin	34 min
Jun 24, 12:39 PM CDT	Severe Thunderstorm Warning	HUN	Franklin, Moore	51 min
Jun 24, 1:06 PM CDT	Special Weather Statement	HUN	Moore	24 min
Jun 24, 1:39 PM CDT	Severe Thunderstorm Warning	HUN	Franklin, Lincoln, Moore	51 min
Jun 24, 2:27 PM CDT	Severe Thunderstorm Warning	HUN	Franklin	33 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2011 Every 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.