Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 221, NWS Huntsville, AL

June 24, 2011Morgan County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Jun 24, 2011, 2:15 PM CDT for Morgan County, Alabama. It was in force for 30 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
Jun 24, 2011, 2:15 PM CDT (19:15 UTC)
Expired
Jun 24, 2011, 2:45 PM CDT
In force
30 min
Issued by
NWS Huntsville, AL
Area
Storm-based polygon

County Morgan County, AL

The radar

The Northeast Alabama radar (KHTX), 88 km from the middle of the area, began a volume at 19:14 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
Jun 24, 1:49 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 7.3 hours before the alert went out and 142 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 12:00Z on 2011-06-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1692 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 12:00Z on 2011-06-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 square meters per square second.193958Sfc1 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
1692 J/kg
Mixed-layer CIN
-82 J/kg
Mixed-layer LCL
755 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
44 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 Jun 24, 1:56 PM CDT, 19 minutes earlier.

Area forecast discussion, Jun 24, 1:56 PM CDT, 19 minutes before
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Hazardous weather outlook, Jun 24, 2:09 PM CDT, 6 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE HUNTSVILLE AL
209 PM CDT FRI JUN 24 2011

ALZ001>010-016-TNZ076-096-097-250315-
LAUDERDALE-COLBERT-FRANKLIN AL-LAWRENCE-LIMESTONE-MADISON-MORGAN-
MARSHALL-JACKSON-DEKALB-CULLMAN-MOORE-LINCOLN-FRANKLIN TN-
209 PM CDT FRI JUN 24 2011

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

.DAY ONE...THIS AFTERNOON AND TONIGHT...

THUNDERSTORMS CONTINUE TO DEVELOP ACROSS THE TENNESSEE VALLEY THIS
AFTERNOON AND WILL LINGER INTO THE EVENING HOURS AS A FRONTAL
BOUNDARY SLIDES SOUTHWARD ACROSS THE AREA. DAMAGING WINDS...LARGE
HAIL...FREQUENT LIGHTNING...AND LOCALLY HEAVY RAINFALL WILL BE
POSSIBLE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR NORTH ALABAMA AND
SOUTHERN TENNESSEE THROUGH 9 PM CDT TONIGHT.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY...

CHANCES FOR THUNDERSTORMS WILL CONTINUE THROUGH THE WEEKEND AND
EARLY NEXT WEEK...AS AN UNSETTLED WEATHER PATTERN PREVAILS ACROSS
THE SOUTHERN STATES.

THE MAIN THREATS POSED BY STRONGER STORMS INCLUDE GUSTY WINDS...
FREQUENT LIGHTNING AND LOCALLY HEAVY RAINFALL. A FEW STORMS COULD
BECOME SEVERE...WITH THE MAIN THREAT DAMAGING WINDS AND MARGINALLY
SEVERE HAIL. LOCALLY HEAVY RAINFALL...ESPECIALLY IF STORMS REPEATEDLY
AFFECT THE SAME AREA...COULD LEAD TO INSTANCES OF FLASH FLOODING.

.SPOTTER CALL TO ACTION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL IS
REQUESTED THIS AFTERNOON AND EVENING. PLEASE RELAY ANY DAMAGE REPORTS
TO THE NATIONAL WEATHER SERVICE...LOCAL EMERGENCY MANAGEMENT
AGENCY...OR LOCAL MEDIA OUTLETS.

12

In the hours before

Special weather statement, Jun 24, 1:34 PM CDT, 41 minutes before
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Local storm report, Jun 24, 2:00 PM CDT, 15 minutes before
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Local storm report, Jun 24, 2:08 PM CDT, 7 minutes before
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Local storm report, Jun 24, 2:11 PM CDT, 4 minutes before
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Local storm report, Jun 24, 2:13 PM CDT, 2 minutes before
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Local storm report, Jun 24, 2:15 PM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 24, 12:28 PM CDTSpecial Weather StatementHUNLimestone32 min
Jun 24, 12:35 PM CDTSevere Thunderstorm WarningHUNLawrence, Limestone, Morgan40 min
Jun 24, 12:53 PM CDTSevere Thunderstorm WarningHUNColbert, Lauderdale, Lawrence52 min
Jun 24, 1:21 PM CDTSevere Thunderstorm WarningHUNColbert, Lawrence, Limestone, Morgan39 min
Jun 24, 1:34 PM CDTSpecial Weather StatementHUNJackson41 min
Jun 24, 1:43 PM CDTSevere Thunderstorm WarningHUNMadison47 min
Jun 24, 1:47 PM CDTSevere Thunderstorm WarningHUNJackson43 min
Jun 24, 2:00 PM CDTSevere Thunderstorm WarningHUNLawrence, Limestone, Madison, Morgan45 min
Jun 24, 2:22 PM CDTSpecial Weather StatementHUNColbert, Franklin, Lawrence23 min
Jun 24, 2:31 PM CDTSevere Thunderstorm WarningHUNCullman, Jackson, Madison, Marshall, Morgan44 min
Jun 24, 2:40 PM CDTSpecial Weather StatementHUNFranklin35 min
Jun 24, 2:42 PM CDTSpecial Weather StatementHUNJackson33 min
Jun 24, 2:48 PM CDTSevere Thunderstorm WarningHUNFranklin27 min
Jun 24, 2:59 PM CDTSpecial Weather StatementHUNLawrence46 min
Jun 24, 3:11 PM CDTTornado WarningHUNJackson18 min
Jun 24, 3:18 PM CDTSpecial Weather StatementHUNFranklin27 min
Jun 24, 3:22 PM CDTSevere Thunderstorm WarningHUNDeKalb, Jackson, Marshall38 min
Jun 24, 3:36 PM CDTSpecial Weather StatementHUNLawrence39 min
Jun 24, 3:39 PM CDTSpecial Weather StatementHUNMorgan36 min
Jun 24, 3:46 PM CDTSevere Thunderstorm WarningHUNCullman, Morgan29 min
Jun 24, 4:07 PM CDTSpecial Weather StatementHUNCullman23 min
Jun 24, 4:15 PM CDTSpecial Weather StatementHUNMorgan45 min
Jun 24, 4:17 PM CDTSpecial Weather StatementHUNMarshall28 min
Jun 24, 4:24 PM CDTSevere Thunderstorm WarningHUNCullman36 min
Jun 24, 4:29 PM CDTSpecial Weather StatementHUNFranklin31 min
Jun 24, 4:33 PM CDTSevere Thunderstorm WarningHUNMarshall27 min
Jun 24, 4:59 PM CDTSpecial Weather StatementHUNMarshall31 min
Jun 24, 5:00 PM CDTSpecial Weather StatementHUNCullman30 min
Jun 24, 12:11 PM CDTSpecial Weather StatementHUNFranklin34 min
Jun 24, 12:39 PM CDTSevere Thunderstorm WarningHUNFranklin, Moore51 min
Jun 24, 1:06 PM CDTSpecial Weather StatementHUNMoore24 min
Jun 24, 1:39 PM CDTSevere Thunderstorm WarningHUNFranklin, Lincoln, Moore51 min
Jun 24, 2:27 PM CDTSevere Thunderstorm WarningHUNFranklin33 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2011Every severe thunderstorm warning in 2011

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.