Alert archive / Alabama / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 89, NWS Huntsville, AL

May 20, 2005Limestone County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at May 20, 2005, 7:24 AM CDT for Limestone County, Alabama. It was in force for 36 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: May 20, 2005, 7:24 AM CDT (12:24 UTC)
Expired: May 20, 2005, 8:00 AM CDT
In force: 36 min
Issued by: NWS Huntsville, AL
Area: Counties, with a storm outline in the text

County Limestone County, AL

The radar

The Northeast Alabama radar (KHTX), 83 km from the middle of the area, began a volume at 12:26 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, 0.4 hours before the alert went out and 182 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: 1086 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 1017 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 147 m²/s²
0-3 km storm-relative helicity: 134 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.9

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 May 20, 2:00 AM CDT, 5 hours 24 minutes earlier.

Area forecast discussion, May 20, 2:00 AM CDT, 5 hours 24 minutes before

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Hazardous weather outlook, May 20, 4:00 AM CDT, 3 hours 24 minutes before

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In the hours before

Special weather statement, May 20, 1:33 AM CDT, 5 hours 51 minutes before

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Special weather statement, May 20, 6:11 AM CDT, 1 hour 13 minutes before

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Special weather statement, May 20, 7:13 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
May 20, 6:41 AM CDT	Severe Thunderstorm Warning	HUN	Limestone	49 min
May 20, 7:24 AM CDT	Severe Thunderstorm Warning	HUN	Madison	39 min
May 20, 7:34 AM CDT	Severe Thunderstorm Warning	HUN	Jackson	36 min
May 20, 8:12 AM CDT	Severe Thunderstorm Warning	HUN	Limestone	43 min
May 20, 12:26 PM CDT	Severe Thunderstorm Warning	HUN	Madison	32 min
May 20, 1:02 PM CDT	Severe Thunderstorm Warning	HUN	Marshall	43 min
May 20, 1:05 PM CDT	Severe Thunderstorm Warning	HUN	Cullman, Morgan	42 min
May 20, 2:07 PM CDT	Severe Thunderstorm Warning	HUN	Cullman	41 min
May 20, 6:35 AM CDT	Severe Thunderstorm Warning	HUN	Franklin, Lincoln, Moore	55 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2005 Every severe thunderstorm warning in 2005

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.