Alert archive / Alabama / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 119, NWS Huntsville, AL

December 24, 2015DeKalb County, Jackson County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Dec 24, 2015, 1:20 AM CST for DeKalb County, Jackson 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
Dec 24, 2015, 1:20 AM CST (07:20 UTC)
Expired
Dec 24, 2015, 1:45 AM CST
In force
25 min
Issued by
NWS Huntsville, AL
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties DeKalb County, AL, Jackson County, AL

The radar

The Northeast Alabama radar (KHTX), 38 km from the middle of the area, began a volume at 07:20 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Dec 23, 10:33 PM CSTTornado WatchSPC5 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 7.3 hours before the alert went out and 179 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-pSkew-T log-p diagram, Birmingham, AL at 00:00Z on 2015-12-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 309 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 00:00Z on 2015-12-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 328 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
309 J/kg
Mixed-layer CIN
-104 J/kg
Mixed-layer LCL
738 m above ground
0-6 km bulk shear
67 kt
0-1 km storm-relative helicity
328 m²/s²
0-3 km storm-relative helicity
466 m²/s²
Significant tornado parameter
0.0
Supercell composite
6.6

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 Dec 24, 12:29 AM CST, 51 minutes earlier.

Area forecast discussion, Dec 24, 12:29 AM CST, 51 minutes before
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Hazardous weather outlook, Dec 24, 12:46 AM CST, 34 minutes before
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In the hours before

Special weather statement, Dec 23, 11:30 PM CST, 1 hour 50 minutes before
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Special weather statement, Dec 23, 11:42 PM CST, 1 hour 38 minutes before
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Special weather statement, Dec 24, 12:23 AM CST, 57 minutes before
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Special weather statement, Dec 24, 12:39 AM CST, 41 minutes before
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Special weather statement, Dec 24, 12:42 AM CST, 38 minutes before
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Special weather statement, Dec 24, 1:09 AM CST, 11 minutes before
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The office that day

Everything else NWS Huntsville, AL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 23, 6:44 PM CSTTornado WarningHUNLauderdale31 min
Dec 23, 6:55 PM CSTSpecial Weather StatementHUNJackson35 min
Dec 23, 7:19 PM CSTSevere Thunderstorm WarningHUNJackson26 min
Dec 23, 7:46 PM CSTSpecial Weather StatementHUNJackson44 min
Dec 23, 9:01 PM CSTSpecial Weather StatementHUNLauderdale29 min
Dec 23, 9:52 PM CSTSpecial Weather StatementHUNLawrence, Limestone23 min
Dec 23, 10:10 PM CSTSevere Thunderstorm WarningHUNLimestone, Madison35 min
Dec 23, 10:18 PM CSTSpecial Weather StatementHUNLawrence27 min
Dec 23, 10:23 PM CSTSevere Thunderstorm WarningHUNLawrence, Morgan37 min
Dec 23, 10:49 PM CSTSpecial Weather StatementHUNMadison41 min
Dec 23, 11:42 PM CSTSpecial Weather StatementHUNCullman48 min
Dec 24, 12:23 AM CSTSpecial Weather StatementHUNMarshall37 min
Dec 24, 12:39 AM CSTSpecial Weather StatementHUNCullman, Marshall36 min
Dec 24, 12:42 AM CSTSpecial Weather StatementHUNJackson33 min
Dec 24, 1:09 AM CSTSpecial Weather StatementHUNDeKalb21 min
Dec 24, 3:22 PM CSTFlood WatchHUNColbert, Cullman, DeKalb, Franklin, Jackson, Lauderdale and 5 more39 hr
Dec 23, 10:45 PM CSTSpecial Weather StatementHUNFranklin45 min
Dec 23, 11:30 PM CSTSpecial Weather StatementHUNFranklin30 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2015Every severe thunderstorm warning in 2015

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.