Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 187, NWS Huntsville, AL

June 17, 2011Limestone County, Madison County, Morgan County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Jun 17, 2011, 12:33 AM CDT for Limestone County, Madison County, Morgan County, Alabama. It was in force for 42 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 17, 2011, 12:33 AM CDT (05:33 UTC)
Expired
Jun 17, 2011, 1:15 AM CDT
In force
42 min
Issued by
NWS Huntsville, AL
Area
Storm-based polygon

Counties Limestone County, AL, Madison County, AL, Morgan County, AL

The radar

The Northeast Alabama radar (KHTX), 71 km from the middle of the area, began a volume at 05:34 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 00:00Z, 5.6 hours before the alert went out and 163 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 00:00Z on 2011-06-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 89 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 00:00Z on 2011-06-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 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
89 J/kg
Mixed-layer CIN
-108 J/kg
Mixed-layer LCL
2222 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
119 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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 16, 9:14 PM CDT, 3 hours 19 minutes earlier.

Area forecast discussion, Jun 16, 9:14 PM CDT, 3 hours 19 minutes before
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Hazardous weather outlook, Jun 16, 1:09 PM CDT, 11 hours 24 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HUNTSVILLE AL
109 PM CDT THU JUN 16 2011

ALZ001>010-016-TNZ076-096-097-171000-
LAUDERDALE-COLBERT-FRANKLIN AL-LAWRENCE-LIMESTONE-MADISON-MORGAN-
MARSHALL-JACKSON-DEKALB-CULLMAN-MOORE-LINCOLN-FRANKLIN TN-
109 PM CDT THU JUN 16 2011

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

.DAY ONE...TONIGHT...

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

THERE IS A CHANCE OF THUNDERSTORMS OVERNIGHT MAINLY OVER NORTHWEST
ALABAMA AS A DISTURBANCE APPROACHES THE REGION FROM THE NORTHWEST.
GUSTY WINDS...FREQUENT CLOUD TO GROUND LIGHTNING STRIKES...AND
LOCALLY HEAVY RAINFALL WILL ACCOMPANY THE STRONGEST STORMS THAT
DEVELOP.

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

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

THE THREAT FOR THUNDERSTORMS WILL CONTINUE THROUGH FRIDAY AFTERNOON WITH
THE DISTURBANCE FROM TONIGHT EXPECTED TO REMAIN OVER THE AREA EARLY
FRIDAY MORNING.

IN ADDITION...THERE IS A SLIGHT CHANCE OF THUNDERSTORMS ACROSS THE
ENTIRE AREA ON WEDNESDAY.

AFTERNOON HEAT INDEX READINGS WILL RISE INTO THE 100-105 DEGREE RANGE
ON SATURDAY...SUNDAY...AND MONDAY AFTERNOONS ACROSS MAINLY PORTIONS
OF NORTHWEST AND NORTH CENTRAL ALABAMA.

.SPOTTER CALL TO ACTION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL IS
NOT ANTICIPATED AT THIS TIME.

In the hours before

Local storm report, Jun 16, 7:36 PM CDT, 4 hours 57 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 17, 12:37 AM CDTSpecial Weather StatementHUNLauderdale, Lawrence38 min
Jun 17, 12:43 AM CDTSevere Thunderstorm WarningHUNColbert, Cullman, Lauderdale, Lawrence, Limestone, Morgan47 min
Jun 17, 12:50 AM CDTSevere Thunderstorm WarningHUNCullman, Morgan40 min
Jun 17, 1:21 AM CDTSpecial Weather StatementHUNMarshall24 min
Jun 17, 1:40 AM CDTSpecial Weather StatementHUNMarshall35 min
Jun 17, 2:08 AM CDTSpecial Weather StatementHUNJackson37 min
Jun 17, 2:51 AM CDTSpecial Weather StatementHUNDeKalb39 min
Jun 17, 8:08 AM CDTSpecial Weather StatementHUNMadison52 min
Jun 17, 8:34 AM CDTSpecial Weather StatementHUNMorgan41 min
Jun 17, 9:03 AM CDTSpecial Weather StatementHUNMorgan42 min
Jun 17, 9:48 AM CDTSpecial Weather StatementHUNMorgan42 min
Jun 17, 9:54 AM CDTSpecial Weather StatementHUNDeKalb51 min
Jun 17, 10:31 AM CDTSpecial Weather StatementHUNMarshall44 min
Jun 17, 11:20 AM CDTSpecial Weather StatementHUNCullman40 min
Jun 17, 1:48 AM CDTSpecial Weather StatementHUNLincoln27 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.