Alert archive / Alabama / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 98, NWS Huntsville, AL

August 18, 2014Cullman County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Aug 18, 2014, 7:51 PM CDT for Cullman County, Alabama. It was in force for 24 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, 7:51 PM CDT (00:51 UTC)
Expired: Aug 18, 2014, 8:15 PM CDT
In force: 24 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon

County Cullman County, AL

The radar

The Birmingham radar (KBMX), 107 km from the middle of the area, began a volume at 00:53 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, 0.9 hours before the alert went out and 235 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: 594 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 1509 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 45 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, 6:55 PM CDT, 56 minutes earlier.

Area forecast discussion, Aug 18, 6:55 PM CDT, 56 minutes before

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Hazardous weather outlook, Aug 18, 2:13 PM CDT, 5 hours 38 minutes before

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In the hours before

Special weather statement, Aug 18, 3:38 PM CDT, 4 hours 13 minutes before

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Special weather statement, Aug 18, 4:01 PM CDT, 3 hours 50 minutes before

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Special weather statement, Aug 18, 4:09 PM CDT, 3 hours 42 minutes before

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Special weather statement, Aug 18, 4:35 PM CDT, 3 hours 16 minutes before

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Special weather statement, Aug 18, 5:55 PM CDT, 1 hour 56 minutes before

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Special weather statement, Aug 18, 7:06 PM CDT, 45 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 18, 7:06 PM CDT	Special Weather Statement	HUN	Cullman	24 min
Aug 18, 7:25 PM CDT	Severe Thunderstorm Warning	HUN	Cullman	35 min
Aug 18, 7:57 PM CDT	Special Weather Statement	HUN	Limestone	33 min
Aug 18, 8:14 PM CDT	Special Weather Statement	HUN	Cullman	31 min
Aug 19, 5:27 PM CDT	Flash Flood Warning	HUN	Cullman	2 hr

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.