Alert archive / Alabama / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 39, NWS Huntsville, AL

April 10, 2009DeKalb County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Apr 10, 2009, 6:04 AM CDT for DeKalb County, Alabama. It was in force for 27 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: Apr 10, 2009, 6:04 AM CDT (11:04 UTC)
Expired: Apr 10, 2009, 6:31 AM CDT
In force: 27 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon

County DeKalb County, AL

The radar

The Northeast Alabama radar (KHTX), 58 km from the middle of the area, began a volume at 11:06 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

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 11.1 hours before the alert went out and 171 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: 2758 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 80 m²/s²
0-3 km storm-relative helicity: 144 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 Apr 10, 3:15 AM CDT, 2 hours 49 minutes earlier.

Area forecast discussion, Apr 10, 3:15 AM CDT, 2 hours 49 minutes before

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Hazardous weather outlook, Apr 10, 4:50 AM CDT, 1 hour 14 minutes before

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In the hours before

Special weather statement, Apr 10, 5:03 AM CDT, 1 hour 1 minute before

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Special weather statement, Apr 10, 5:14 AM CDT, 50 minutes before

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Special weather statement, Apr 10, 5:15 AM CDT, 49 minutes before

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Local storm report, Apr 10, 5:17 AM CDT, 47 minutes before

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Local storm report, Apr 10, 5:27 AM CDT, 37 minutes before

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Special weather statement, Apr 10, 5:51 AM CDT, 13 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
Apr 10, 5:20 AM CDT	Severe Thunderstorm Warning	HUN	Cullman	25 min
Apr 10, 5:27 AM CDT	Severe Thunderstorm Warning	HUN	Marshall	48 min
Apr 10, 11:55 AM CDT	Tornado Warning	HUN	Lauderdale	35 min
Apr 10, 12:28 PM CDT	Severe Thunderstorm Warning	HUN	Lauderdale	32 min
Apr 10, 12:31 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale	29 min
Apr 10, 12:33 PM CDT	Tornado Warning	HUN	Lauderdale	27 min
Apr 10, 12:44 PM CDT	Tornado Warning	HUN	Colbert, Lauderdale	46 min
Apr 10, 12:47 PM CDT	Tornado Warning	HUN	Lauderdale	43 min
Apr 10, 12:53 PM CDT	Tornado Warning	HUN	Colbert, Franklin	37 min
Apr 10, 1:06 PM CDT	Wind Advisory	HUN	Colbert, Cullman, DeKalb, Franklin, Jackson, Lauderdale and 5 more	6 hr
Apr 10, 1:29 PM CDT	Severe Thunderstorm Warning	HUN	Limestone, Madison	46 min
Apr 10, 1:30 PM CDT	Severe Thunderstorm Warning	HUN	Lawrence, Morgan	15 min
Apr 10, 1:32 PM CDT	Tornado Warning	HUN	Lauderdale, Limestone	28 min
Apr 10, 1:33 PM CDT	Severe Thunderstorm Warning	HUN	Franklin	42 min
Apr 10, 1:33 PM CDT	Tornado Warning	HUN	Limestone	27 min
Apr 10, 1:45 PM CDT	Severe Thunderstorm Warning	HUN	Lawrence, Morgan	45 min
Apr 10, 1:48 PM CDT	Severe Thunderstorm Warning	HUN	Limestone	27 min
Apr 10, 1:54 PM CDT	Tornado Warning	HUN	Lawrence, Morgan	36 min
Apr 10, 2:00 PM CDT	Tornado Warning	HUN	Limestone, Madison	15 min
Apr 10, 2:01 PM CDT	Severe Thunderstorm Warning	HUN	Madison	44 min
Apr 10, 2:16 PM CDT	Severe Thunderstorm Warning	HUN	Madison, Marshall, Morgan	29 min
Apr 10, 2:20 PM CDT	Tornado Warning	HUN	Limestone, Madison, Morgan	25 min
Apr 10, 2:27 PM CDT	Flash Flood Warning	HUN	Limestone, Madison, Morgan	80 min
Apr 10, 2:27 PM CDT	Severe Thunderstorm Warning	HUN	Jackson, Madison	24 min
Apr 10, 2:31 PM CDT	Severe Thunderstorm Warning	HUN	Lawrence, Morgan	29 min
Apr 10, 2:43 PM CDT	Tornado Warning	HUN	Madison	32 min
Apr 10, 2:48 PM CDT	Severe Thunderstorm Warning	HUN	Jackson	27 min
Apr 10, 2:50 PM CDT	Severe Thunderstorm Warning	HUN	Cullman, Lawrence, Morgan	40 min
Apr 10, 2:54 PM CDT	Severe Thunderstorm Warning	HUN	Jackson, Marshall	51 min
Apr 10, 3:05 PM CDT	Tornado Warning	HUN	Jackson, Marshall	25 min
Apr 10, 3:12 PM CDT	Tornado Warning	HUN	DeKalb, Jackson	33 min
Apr 10, 3:14 PM CDT	Severe Thunderstorm Warning	HUN	Jackson	31 min
Apr 10, 3:21 PM CDT	Severe Thunderstorm Warning	HUN	Cullman, Marshall, Morgan	39 min
Apr 10, 3:27 PM CDT	Flash Flood Warning	HUN	DeKalb, Jackson, Marshall	2 hr
Apr 10, 3:30 PM CDT	Severe Thunderstorm Warning	HUN	DeKalb, Jackson	45 min
Apr 10, 3:32 PM CDT	Severe Thunderstorm Warning	HUN	DeKalb	43 min
Apr 10, 3:33 PM CDT	Severe Thunderstorm Warning	HUN	DeKalb, Marshall	27 min
Apr 10, 3:33 PM CDT	Tornado Warning	HUN	DeKalb	27 min
Apr 10, 3:37 PM CDT	Severe Thunderstorm Warning	HUN	Cullman	23 min
Apr 10, 3:58 PM CDT	Severe Thunderstorm Warning	HUN	DeKalb, Marshall	47 min
Apr 10, 4:02 PM CDT	Severe Thunderstorm Warning	HUN	Cullman	13 min
Apr 10, 4:04 PM CDT	Tornado Warning	HUN	DeKalb	26 min
Apr 10, 4:06 PM CDT	Tornado Warning	HUN	Marshall	13 min
Apr 10, 4:15 PM CDT	Tornado Warning	HUN	Marshall	30 min
Apr 10, 4:28 PM CDT	Severe Thunderstorm Warning	HUN	DeKalb	32 min
Apr 10, 4:40 PM CDT	Tornado Warning	HUN	DeKalb	16 min
Apr 10, 1:11 PM CDT	Severe Thunderstorm Warning	HUN	Lincoln	19 min
Apr 10, 1:44 PM CDT	Tornado Warning	HUN	Lincoln, Moore	46 min
Apr 10, 2:06 PM CDT	Tornado Warning	HUN	Franklin	24 min
Apr 10, 2:31 PM CDT	Severe Thunderstorm Warning	HUN	Franklin, Moore	29 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2009 Every severe thunderstorm warning in 2009

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.