Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 274, NWS Huntsville, AL

August 4, 2011Marshall County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Aug 4, 2011, 11:05 AM CDT for Marshall County, Alabama. It was in force for 25 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 4, 2011, 11:05 AM CDT (16:05 UTC)
Expired: Aug 4, 2011, 11:30 AM CDT
In force: 25 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon

County Marshall County, AL

The radar

The Northeast Alabama radar (KHTX), 66 km from the middle of the area, began a volume at 16:06 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

Birmingham, AL (KBMX), launched 12:00Z, 4.1 hours before the alert went out and 139 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: 496 J/kg
Mixed-layer CIN: -354 J/kg
Mixed-layer LCL: 1432 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -34 m²/s²
0-3 km storm-relative helicity: -66 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 Aug 4, 10:10 AM CDT, 55 minutes earlier.

Area forecast discussion, Aug 4, 10:10 AM CDT, 55 minutes before

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Hazardous weather outlook, Aug 4, 10:30 AM CDT, 35 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE HUNTSVILLE AL
1030 AM CDT THU AUG 4 2011

ALZ001>010-016-TNZ076-096-097-051000-
LAUDERDALE-COLBERT-FRANKLIN AL-LAWRENCE-LIMESTONE-MADISON-MORGAN-
MARSHALL-JACKSON-DEKALB-CULLMAN-MOORE-LINCOLN-FRANKLIN TN-
1030 AM CDT THU AUG 4 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH ALABAMA AND PORTIONS OF
SOUTHERN MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT...

SCATTERED THUNDERSTORMS WILL BE POSSIBLE...WITH GUSTY
WINDS...HAIL...FREQUENT CLOUD TO GROUND LIGHTNING STRIKES AND
TORRENTIAL RAINFALL THE MAIN THREATS WITH THE MAJORITY OF STORMS.
HOWEVER...A FEW OF THE STORMS COULD BECOME SEVERE...WITH DAMAGING
WINDS POSSIBLE.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY...

THERE IS A CHANCE OF MAINLY AFTERNOON AND EVENING THUNDERSTORMS
THROUGH WEDNESDAY. A FEW STRONG STORMS WILL BE POSSIBLE EACH DAY...
WITH GUSTY WINDS...LIGHTNING...AND LOCALLY HEAVY RAINFALL THE PRIMARY
HAZARDS.

HEAT INDEX VALUES MAY REACH DANGEROUS LEVELS THROUGH THE UPCOMING
WEEKEND...WITH AFTERNOON HEAT INDICES POSSIBLY WARRANTING HEAT
ADVISORIES THROUGH THE PERIOD.

.SPOTTER CALL TO ACTION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL IS
POSSIBLE TODAY...AND STORM REPORTS ARE ALWAYS GREATLY APPRECIATED.

DD/JLL

In the hours before

Special weather statement, Aug 4, 10:09 AM CDT, 56 minutes before

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Special weather statement, Aug 4, 10:15 AM CDT, 50 minutes before

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Special weather statement, Aug 4, 10:25 AM CDT, 40 minutes before

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Special weather statement, Aug 4, 10:43 AM CDT, 22 minutes before

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Special weather statement, Aug 4, 10:50 AM CDT, 15 minutes before

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Special weather statement, Aug 4, 10:54 AM CDT, 11 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 3, 10:39 PM CDT	Heat Advisory	HUN	Colbert, Cullman, DeKalb, Franklin, Jackson, Lauderdale and 5 more	7 hr
Aug 3, 11:31 PM CDT	Special Weather Statement	HUN	Jackson	29 min
Aug 3, 11:36 PM CDT	Severe Thunderstorm Warning	HUN	Madison	24 min
Aug 3, 11:45 PM CDT	Severe Thunderstorm Warning	HUN	Lauderdale, Lawrence, Limestone, Madison	30 min
Aug 3, 11:58 PM CDT	Severe Thunderstorm Warning	HUN	Jackson, Madison	32 min
Aug 4, 12:04 AM CDT	Flash Flood Warning	HUN	Jackson, Lauderdale, Lawrence, Limestone, Madison	3 hr
Aug 4, 12:13 AM CDT	Severe Thunderstorm Warning	HUN	Lauderdale, Lawrence, Limestone, Madison, Marshall, Morgan	47 min
Aug 4, 12:20 AM CDT	Severe Thunderstorm Warning	HUN	Cullman, Lawrence, Madison, Marshall, Morgan	40 min
Aug 4, 12:30 AM CDT	Special Weather Statement	HUN	DeKalb, Jackson	45 min
Aug 4, 12:45 AM CDT	Severe Thunderstorm Warning	HUN	Cullman	30 min
Aug 4, 12:46 AM CDT	Severe Thunderstorm Warning	HUN	DeKalb, Jackson, Marshall	31 min
Aug 4, 1:22 AM CDT	Special Weather Statement	HUN	Limestone	38 min
Aug 4, 1:35 AM CDT	Severe Thunderstorm Warning	HUN	Lauderdale, Limestone	40 min
Aug 4, 1:55 AM CDT	Severe Thunderstorm Warning	HUN	Limestone, Madison, Morgan	50 min
Aug 4, 2:13 AM CDT	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale	47 min
Aug 4, 2:30 AM CDT	Severe Thunderstorm Warning	HUN	Lawrence, Limestone, Madison, Morgan	45 min
Aug 4, 2:38 AM CDT	Flash Flood Warning	HUN	Cullman, DeKalb, Jackson, Lawrence, Limestone, Madison and 2 more	3 hr
Aug 4, 2:46 AM CDT	Severe Thunderstorm Warning	HUN	Colbert, Franklin, Lauderdale, Lawrence	44 min
Aug 4, 2:57 AM CDT	Areal Flood Warning	HUN	Jackson, Lauderdale, Lawrence, Limestone, Madison	6 hr
Aug 4, 3:05 AM CDT	Severe Thunderstorm Warning	HUN	Lawrence	40 min
Aug 4, 3:09 AM CDT	Flash Flood Warning	HUN	Colbert, Lauderdale, Lawrence	3 hr
Aug 4, 3:14 AM CDT	Special Weather Statement	HUN	Cullman	46 min
Aug 4, 3:20 AM CDT	Special Weather Statement	HUN	Limestone	40 min
Aug 4, 3:21 AM CDT	Severe Thunderstorm Warning	HUN	Franklin, Lawrence	39 min
Aug 4, 3:50 AM CDT	Special Weather Statement	HUN	Morgan	40 min
Aug 4, 5:35 AM CDT	Areal Flood Warning	HUN	Cullman, DeKalb, Jackson, Lawrence, Limestone, Madison and 2 more	3 hr
Aug 4, 5:37 AM CDT	Heat Advisory	HUN	Colbert, Cullman, Franklin, Lauderdale, Lawrence, Limestone and 3 more	5 hr
Aug 4, 5:53 AM CDT	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale	37 min
Aug 4, 6:00 AM CDT	Areal Flood Warning	HUN	Colbert, Lauderdale, Lawrence	3 hr
Aug 4, 6:01 AM CDT	Special Weather Statement	HUN	Morgan	44 min
Aug 4, 6:25 AM CDT	Special Weather Statement	HUN	Limestone	50 min
Aug 4, 6:29 AM CDT	Severe Thunderstorm Warning	HUN	Colbert, Franklin, Lawrence	46 min
Aug 4, 7:11 AM CDT	Special Weather Statement	HUN	Limestone, Morgan	64 min
Aug 4, 7:15 AM CDT	Special Weather Statement	HUN	Lawrence	30 min
Aug 4, 7:50 AM CDT	Special Weather Statement	HUN	Limestone	55 min
Aug 4, 8:21 AM CDT	Special Weather Statement	HUN	DeKalb	24 min
Aug 4, 8:37 AM CDT	Special Weather Statement	HUN	Morgan	53 min
Aug 4, 9:45 AM CDT	Special Weather Statement	HUN	Morgan	30 min
Aug 4, 9:55 AM CDT	Special Weather Statement	HUN	Madison	50 min
Aug 4, 10:03 AM CDT	Severe Thunderstorm Warning	HUN	Madison	42 min
Aug 4, 10:09 AM CDT	Special Weather Statement	HUN	DeKalb	51 min
Aug 4, 10:15 AM CDT	Special Weather Statement	HUN	DeKalb	45 min
Aug 4, 10:25 AM CDT	Special Weather Statement	HUN	Jackson	35 min
Aug 4, 10:43 AM CDT	Special Weather Statement	HUN	Marshall	47 min
Aug 4, 10:50 AM CDT	Special Weather Statement	HUN	DeKalb	40 min
Aug 4, 10:54 AM CDT	Special Weather Statement	HUN	Marshall	36 min
Aug 4, 11:11 AM CDT	Special Weather Statement	HUN	DeKalb	49 min
Aug 4, 11:14 AM CDT	Special Weather Statement	HUN	Cullman	31 min
Aug 4, 11:17 AM CDT	Special Weather Statement	HUN	Jackson	28 min
Aug 4, 11:24 AM CDT	Special Weather Statement	HUN	Marshall	51 min
Aug 4, 11:34 AM CDT	Severe Thunderstorm Warning	HUN	Jackson	26 min
Aug 4, 11:53 AM CDT	Special Weather Statement	HUN	DeKalb	22 min
Aug 4, 12:01 PM CDT	Special Weather Statement	HUN	DeKalb	44 min
Aug 4, 12:04 PM CDT	Special Weather Statement	HUN	Madison	26 min
Aug 4, 12:45 PM CDT	Special Weather Statement	HUN	DeKalb	45 min
Aug 4, 12:55 PM CDT	Special Weather Statement	HUN	Jackson	50 min
Aug 4, 1:05 PM CDT	Special Weather Statement	HUN	Jackson	55 min
Aug 4, 1:14 PM CDT	Special Weather Statement	HUN	Marshall	46 min
Aug 4, 1:25 PM CDT	Special Weather Statement	HUN	Morgan	50 min
Aug 4, 1:57 PM CDT	Special Weather Statement	HUN	Marshall	48 min
Aug 4, 2:09 PM CDT	Special Weather Statement	HUN	DeKalb	21 min
Aug 4, 2:27 PM CDT	Special Weather Statement	HUN	Blount	33 min
Aug 4, 2:43 PM CDT	Special Weather Statement	HUN	Franklin	47 min
Aug 4, 3:01 PM CDT	Special Weather Statement	HUN	Franklin	29 min
Aug 4, 3:06 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Franklin	39 min
Aug 4, 3:16 PM CDT	Special Weather Statement	HUN	Lawrence	44 min
Aug 4, 3:18 PM CDT	Special Weather Statement	HUN	Lawrence	42 min
Aug 4, 3:42 PM CDT	Severe Thunderstorm Warning	HUN	Franklin	15 min
Aug 4, 4:03 PM CDT	Special Weather Statement	HUN	Lauderdale	27 min
Aug 4, 4:17 PM CDT	Special Weather Statement	HUN	Cullman	43 min
Aug 4, 4:47 PM CDT	Special Weather Statement	HUN	Colbert	43 min
Aug 4, 4:56 PM CDT	Special Weather Statement	HUN	Lauderdale	34 min
Aug 4, 5:36 PM CDT	Special Weather Statement	HUN	Colbert, Lawrence	24 min
Aug 4, 5:47 PM CDT	Flash Flood Warning	HUN	Colbert, Lauderdale	3 hr
Aug 4, 5:56 PM CDT	Special Weather Statement	HUN	Franklin, Lawrence	34 min
Aug 4, 6:11 PM CDT	Severe Thunderstorm Warning	HUN	Franklin, Lawrence	38 min
Aug 3, 10:21 PM CDT	Special Weather Statement	HUN	Franklin	24 min
Aug 3, 10:40 PM CDT	Special Weather Statement	HUN	Lincoln	35 min
Aug 3, 11:16 PM CDT	Special Weather Statement	HUN	Lincoln	29 min
Aug 3, 11:44 PM CDT	Flash Flood Warning	HUN	Lincoln	3 hr

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.