Alert archive / Alabama / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 20, NWS Huntsville, AL

May 12, 2016Lauderdale County, Lawrence County, Limestone County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at May 12, 2016, 5:02 PM CDT for Lauderdale County, Lawrence County, Limestone County, Alabama. It was in force for 43 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 12, 2016, 5:02 PM CDT (22:02 UTC)
Expired
May 12, 2016, 5:45 PM CDT
In force
43 min
Issued by
NWS Huntsville, AL
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Lauderdale County, AL, Lawrence County, AL, Limestone County, AL

The radar

The Northeast Alabama radar (KHTX), 114 km from the middle of the area, began a volume at 22:03 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

Nashville Metro, TN (KBNA), launched 12:00Z, 10.0 hours before the alert went out and 167 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, Nashville Metro, TN at 12:00Z on 2016-05-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 134 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, Nashville Metro, TN at 12:00Z on 2016-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 square meters per square second.1939Sfc1 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
134 J/kg
Mixed-layer CIN
-93 J/kg
Mixed-layer LCL
832 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
67 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 May 12, 2:28 PM CDT, 2 hours 34 minutes earlier.

Area forecast discussion, May 12, 2:28 PM CDT, 2 hours 34 minutes before
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Hazardous weather outlook, May 12, 2:41 AM CDT, 14 hours 21 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HUNTSVILLE AL
241 AM CDT THU MAY 12 2016

ALZ001>010-016-TNZ076-096-097-122100-
LAUDERDALE-COLBERT-FRANKLIN AL-LAWRENCE-LIMESTONE-MADISON-MORGAN-
MARSHALL-JACKSON-DE KALB-CULLMAN-MOORE-LINCOLN-FRANKLIN TN-
241 AM CDT THU MAY 12 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH ALABAMA AND PORTIONS
OF SOUTHERN MIDDLE TENNESSEE.

.DAY ONE...TODAY AND TONIGHT...

A COLD FRONT WILL BRING THE POTENTIAL FOR A FEW SEVERE THUNDERSTORMS
THIS AFTERNOON AND TONIGHT ACROSS THE TENNESSEE VALLEY. THE PRIMARY
THREATS WILL BE LARGE HAIL UP TO THE SIZE OF QUARTERS AND DAMAGING
WINDS UP TO 60 MPH. THE THUNDERSTORM ACTIVITY WILL TAPER OFF AROUND
MIDNIGHT.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY...

SCATTERED THUNDERSTORMS WILL BE POSSIBLE MONDAY THROUGH WEDNESDAY.

.SPOTTER CALL TO ACTION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL
MAY BE POSSIBLE THIS AFTERNOON AND EVENING.

In the hours before

Special weather statement, May 12, 3:46 PM CDT, 1 hour 16 minutes before
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Special weather statement, May 12, 3:47 PM CDT, 1 hour 15 minutes before
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Special weather statement, May 12, 4:06 PM CDT, 56 minutes before
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Special weather statement, May 12, 4:35 PM CDT, 27 minutes before
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Special weather statement, May 12, 4:41 PM CDT, 21 minutes before
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Special weather statement, May 12, 4:49 PM CDT, 13 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 12, 7:18 AM CDTSpecial Weather StatementHUNJackson42 min
May 12, 8:06 AM CDTSpecial Weather StatementHUNJackson39 min
May 12, 8:34 AM CDTSpecial Weather StatementHUNColbert41 min
May 12, 11:17 AM CDTSpecial Weather StatementHUNCullman43 min
May 12, 11:19 AM CDTSpecial Weather StatementHUNCullman41 min
May 12, 11:30 AM CDTSpecial Weather StatementHUNMadison45 min
May 12, 12:01 PM CDTSpecial Weather StatementHUNMorgan44 min
May 12, 12:26 PM CDTSpecial Weather StatementHUNMorgan49 min
May 12, 12:32 PM CDTSpecial Weather StatementHUNMorgan43 min
May 12, 12:55 PM CDTSpecial Weather StatementHUNMadison50 min
May 12, 1:00 PM CDTSpecial Weather StatementHUNMadison45 min
May 12, 1:14 PM CDTSpecial Weather StatementHUNMadison46 min
May 12, 1:24 PM CDTSpecial Weather StatementHUNJackson51 min
May 12, 1:27 PM CDTSpecial Weather StatementHUNDeKalb48 min
May 12, 1:34 PM CDTSpecial Weather StatementHUNLimestone41 min
May 12, 3:46 PM CDTSpecial Weather StatementHUNColbert29 min
May 12, 3:47 PM CDTSpecial Weather StatementHUNLauderdale43 min
May 12, 4:06 PM CDTSpecial Weather StatementHUNColbert24 min
May 12, 4:35 PM CDTSpecial Weather StatementHUNLauderdale40 min
May 12, 4:41 PM CDTSpecial Weather StatementHUNFranklin49 min
May 12, 4:49 PM CDTSpecial Weather StatementHUNLimestone41 min
May 12, 5:10 PM CDTSpecial Weather StatementHUNFranklin50 min
May 12, 5:38 PM CDTSevere Thunderstorm WarningHUNLimestone, Madison25 min
May 12, 6:00 PM CDTSpecial Weather StatementHUNLawrence, Morgan45 min
May 12, 6:06 PM CDTSpecial Weather StatementHUNMadison39 min
May 12, 6:21 PM CDTSpecial Weather StatementHUNCullman24 min
May 12, 6:26 PM CDTSpecial Weather StatementHUNJackson34 min
May 12, 6:50 PM CDTSpecial Weather StatementHUNCullman, Morgan40 min
May 12, 11:15 AM CDTSpecial Weather StatementHUNFranklin45 min
May 12, 12:28 PM CDTSpecial Weather StatementHUNFranklin47 min
May 12, 1:56 PM CDTSpecial Weather StatementHUNFranklin49 min
May 12, 2:09 PM CDTSpecial Weather StatementHUNLincoln51 min
May 12, 2:27 PM CDTSpecial Weather StatementHUNFranklin48 min
May 12, 2:35 PM CDTSpecial Weather StatementHUNLincoln25 min
May 12, 5:15 PM CDTSpecial Weather StatementHUNLincoln30 min
May 12, 5:50 PM CDTSpecial Weather StatementHUNLincoln40 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2016Every severe thunderstorm warning in 2016

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.