Alert archive / Alabama / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 96, NWS Huntsville, AL

August 18, 2014Cullman County, Morgan County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Aug 18, 2014, 4:04 PM CDT for Cullman County, Morgan County, Alabama. It was in force for 26 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 18, 2014, 4:04 PM CDT (21:04 UTC)
Expired: Aug 18, 2014, 4:30 PM CDT
In force: 26 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon

Counties Cullman County, AL, Morgan County, AL

The radar

The Northeast Alabama radar (KHTX), 100 km from the middle of the area, began a volume at 21:06 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, 9.1 hours before the alert went out and 124 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: 858 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 659 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: -1 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 18, 3:01 PM CDT, 1 hour 3 minutes earlier.

Area forecast discussion, Aug 18, 3:01 PM CDT, 1 hour 3 minutes before

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Hazardous weather outlook, Aug 18, 2:13 PM CDT, 1 hour 51 minutes before

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In the hours before

Local storm report, Aug 18, 2:49 PM CDT, 1 hour 15 minutes before

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Special weather statement, Aug 18, 2:52 PM CDT, 1 hour 12 minutes before

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Special weather statement, Aug 18, 2:58 PM CDT, 1 hour 6 minutes before

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Special weather statement, Aug 18, 3:30 PM CDT, 34 minutes before

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Special weather statement, Aug 18, 3:38 PM CDT, 26 minutes before

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Special weather statement, Aug 18, 4:01 PM CDT, 3 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 17, 8:47 PM CDT	Special Weather Statement	HUN	Colbert	43 min
Aug 17, 9:22 PM CDT	Special Weather Statement	HUN	Franklin	38 min
Aug 18, 4:48 AM CDT	Special Weather Statement	HUN	Madison	42 min
Aug 18, 5:06 AM CDT	Special Weather Statement	HUN	Morgan	39 min
Aug 18, 5:53 AM CDT	Special Weather Statement	HUN	Jackson	37 min
Aug 18, 7:19 AM CDT	Special Weather Statement	HUN	Jackson	56 min
Aug 18, 8:38 AM CDT	Flash Flood Warning	HUN	Jackson	6 hr
Aug 18, 11:57 AM CDT	Special Weather Statement	HUN	Morgan	33 min
Aug 18, 12:48 PM CDT	Special Weather Statement	HUN	Madison	27 min
Aug 18, 2:52 PM CDT	Special Weather Statement	HUN	DeKalb	38 min
Aug 18, 2:58 PM CDT	Special Weather Statement	HUN	Cullman	32 min
Aug 18, 3:30 PM CDT	Special Weather Statement	HUN	Madison	45 min
Aug 18, 4:01 PM CDT	Special Weather Statement	HUN	Morgan	44 min
Aug 18, 4:09 PM CDT	Special Weather Statement	HUN	Marshall	36 min
Aug 18, 4:35 PM CDT	Special Weather Statement	HUN	Marshall	40 min
Aug 18, 5:55 PM CDT	Special Weather Statement	HUN	Franklin	50 min
Aug 18, 4:01 AM CDT	Special Weather Statement	HUN	Moore	59 min
Aug 18, 4:33 AM CDT	Flash Flood Warning	HUN	Franklin, Moore	3 hr
Aug 18, 6:17 AM CDT	Flash Flood Warning	HUN	Franklin, Lincoln, Moore	5 hr
Aug 18, 3:38 PM CDT	Special Weather Statement	HUN	Franklin	52 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2014 Every severe thunderstorm warning in 2014

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.