Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 39, NWS Huntsville, AL

March 26, 2011Franklin County, Lawrence County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Mar 26, 2011, 8:29 PM CDT for Franklin County, Lawrence County, Alabama. It was in force for 18 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Mar 26, 2011, 8:29 PM CDT (01:29 UTC)
Expired
Mar 26, 2011, 8:47 PM CDT
In force
18 min
Issued by
NWS Huntsville, AL
Area
Storm-based polygon

Counties Franklin County, AL, Lawrence County, AL

The radar

The Columbus AFB radar (KGWX), 75 km from the middle of the area, began a volume at 01:30 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.

What was reported inside it

TimeReportWhereRemark
Mar 26, 8:39 PM CDTHAIL 0.753 Sw Phil Campbell, AL

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 1.5 hours before the alert went out and 160 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 2011-03-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1774 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 00:00Z on 2011-03-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 274 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
1774 J/kg
Mixed-layer CIN
-17 J/kg
Mixed-layer LCL
1230 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
274 m²/s²
0-3 km storm-relative helicity
373 m²/s²
Significant tornado parameter
2.7
Supercell composite
16.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

488 
WUUS54 KHUN 270129
SVRHUN
ALC059-079-270200-
/O.NEW.KHUN.SV.W.0039.110327T0129Z-110327T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HUNTSVILLE AL
829 PM CDT SAT MAR 26 2011

THE NATIONAL WEATHER SERVICE IN HUNTSVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN FRANKLIN COUNTY IN NORTHWEST ALABAMA...
  SOUTHWESTERN LAWRENCE COUNTY IN NORTHWEST ALABAMA...

* UNTIL 900 PM CDT

* AT 827 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  
  THIS STORM WAS LOCATED NEAR HODGES...MOVING EAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  DUKETON...
  SPRUCE PINE...ISBELL...
  PHIL CAMPBELL...
  MT HOPE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

&&

LAT...LON 3432 8798 3443 8798 3449 8740 3431 8741
TIME...MOT...LOC 0129Z 274DEG 43KT 3435 8791

$$
1 follow-up statement
962 
WWUS54 KHUN 270147
SVSHUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
847 PM CDT SAT MAR 26 2011

ALC059-079-270156-
/O.CAN.KHUN.SV.W.0039.000000T0000Z-110327T0200Z/
FRANKLIN AL-LAWRENCE AL-
847 PM CDT SAT MAR 26 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN LAWRENCE AND
SOUTHEASTERN FRANKLIN COUNTIES IS CANCELED...

WEATHER SERVICE DOPPLER RADAR INDICATES THE THUNDERSTORM THAT
PROMPTED THE WARNING HAS MOVED OUT OF THE COUNTY. THEREFORE THE
SEVERE THUNDERSTORM WARNING HAS BEEN CANCELED.

LAT...LON 3432 8798 3443 8798 3449 8740 3431 8741
TIME...MOT...LOC 0146Z 274DEG 43KT 3433 8766

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 26, 7:07 PM CDTSpecial Weather StatementHUNJackson23 min
Mar 26, 7:10 PM CDTSpecial Weather StatementHUNMarshall35 min
Mar 26, 7:25 PM CDTSpecial Weather StatementHUNColbert, Lawrence50 min
Mar 26, 7:32 PM CDTSpecial Weather StatementHUNMadison43 min
Mar 26, 7:35 PM CDTSevere Thunderstorm WarningHUNDeKalb, Jackson25 min
Mar 26, 7:43 PM CDTTornado WarningHUNFranklin, Lawrence32 min
Mar 26, 7:47 PM CDTSevere Thunderstorm WarningHUNMadison, Marshall, Morgan28 min
Mar 26, 8:17 PM CDTSevere Thunderstorm WarningHUNDeKalb, Marshall28 min
Mar 26, 8:23 PM CDTSpecial Weather StatementHUNFranklin52 min
Mar 26, 9:03 PM CDTSevere Thunderstorm WarningHUNCullman27 min
Mar 26, 9:47 PM CDTSevere Thunderstorm WarningHUNCullman28 min
Mar 26, 11:02 PM CDTRiver Flood WarningHUNMadison17 hr
Mar 27, 12:06 AM CDTSpecial Weather StatementHUNJackson24 min
Mar 27, 12:12 AM CDTSpecial Weather StatementHUNMadison33 min
Mar 27, 12:43 AM CDTSpecial Weather StatementHUNDeKalb32 min
Mar 27, 12:47 AM CDTSpecial Weather StatementHUNJackson28 min
Mar 27, 2:09 AM CDTSpecial Weather StatementHUNMorgan36 min
Mar 27, 2:49 AM CDTSpecial Weather StatementHUNDeKalb, Jackson26 min
Mar 27, 3:31 AM CDTSpecial Weather StatementHUNDeKalb, Marshall44 min
Mar 27, 7:02 AM CDTDense Fog AdvisoryHUNDeKalb, Jackson4 hr
Mar 27, 2:25 PM CDTRiver Flood WarningHUNJackson, Madison, Marshall49 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.