Alert archive / Alabama / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 310, NWS Birmingham, AL

August 20, 2002Colbert County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Aug 20, 2002, 4:44 PM CDT for Colbert County, Alabama. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 20, 2002, 4:44 PM CDT (21:44 UTC)
Expired
Aug 20, 2002, 5:15 PM CDT
In force
31 min
Issued by
NWS Birmingham, AL
Area
Counties, with a storm outline in the text

County Colbert County, AL

The radar

The Birmingham radar (KBMX), 101 km from the middle of the area, began a volume at 21:47 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
Aug 20, 2:10 PM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 9.7 hours before the alert went out and 100 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 2002-08-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1890 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 12:00Z on 2002-08-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 52 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
1890 J/kg
Mixed-layer CIN
-63 J/kg
Mixed-layer LCL
786 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
52 m²/s²
0-3 km storm-relative helicity
64 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KBMX 202142
SVRBHM
ALC043-202230-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
442 PM CDT TUE AUG 20 2002

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CULLMAN COUNTY IN NORTH CENTRAL ALABAMA

* UNTIL 530 PM CDT

* AT 434 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 8 MILES NORTHWEST OF WEST POINT  
TO 5 MILES NORTHEAST OF HANCEVILLE...MOVING SOUTHWEST AT 15 MPH.

* LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...COLONY...
CULLMAN...GARDEN CITY AND SOUTH VINEMONT.

HAIL TO THE SIZE OF NICKELS AND WIND GUSTS TO 60 MPH CAN BE EXPECTED 
IN THE WARNED AREA. IF YOU ARE IN THE PATH OF THIS STORM...MOVE TO A 
SUBSTANTIAL SHELTER.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A STURDY BUILDING.
DAMAGING WIND...AND LARGE HAIL ARE LIKELY. STAY INSIDE...AWAY FROM
WINDOWS UNTIL THE STORM HAS PASSED.

CALL 1-800-856-0758 TO REPORT SEVERE WEATHER.

LAT...LON 3431 8699 3413 8665 3410 8670 3405 8670
          3396 8681 3393 8691 3389 8694 3389 8699
          3394 8709 3430 8709

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 20, 2:13 PM CDTSevere Thunderstorm WarningBMXJackson32 min
Aug 20, 2:23 PM CDTSevere Thunderstorm WarningBMXMadison37 min
Aug 20, 2:54 PM CDTSevere Thunderstorm WarningBMXDeKalb51 min
Aug 20, 3:02 PM CDTSevere Thunderstorm WarningBMXMadison28 min
Aug 20, 3:10 PM CDTSevere Thunderstorm WarningBMXColbert35 min
Aug 20, 3:12 PM CDTSevere Thunderstorm WarningBMXMarshall33 min
Aug 20, 3:16 PM CDTSevere Thunderstorm WarningBMXLauderdale44 min
Aug 20, 3:20 PM CDTSevere Thunderstorm WarningBMXMorgan25 min
Aug 20, 3:26 PM CDTSevere Thunderstorm WarningBMXEtowah34 min
Aug 20, 3:48 PM CDTSevere Thunderstorm WarningBMXMorgan27 min
Aug 20, 3:51 PM CDTSevere Thunderstorm WarningBMXBlount39 min
Aug 20, 3:53 PM CDTSevere Thunderstorm WarningBMXCullman52 min
Aug 20, 4:02 PM CDTSevere Thunderstorm WarningBMXLauderdale28 min
Aug 20, 4:06 PM CDTSevere Thunderstorm WarningBMXEtowah24 min
Aug 20, 4:09 PM CDTSevere Thunderstorm WarningBMXEtowah51 min
Aug 20, 4:10 PM CDTSevere Thunderstorm WarningBMXEtowah50 min
Aug 20, 4:26 PM CDTSevere Thunderstorm WarningBMXBlount49 min
Aug 20, 4:32 PM CDTSevere Thunderstorm WarningBMXFranklin, Lee28 min
Aug 20, 4:37 PM CDTSevere Thunderstorm WarningBMXTallapoosa23 min
Aug 20, 4:41 PM CDTSevere Thunderstorm WarningBMXCoosa49 min
Aug 20, 4:42 PM CDTSevere Thunderstorm WarningBMXCullman48 min
Aug 20, 4:48 PM CDTSevere Thunderstorm WarningBMXCleburne27 min
Aug 20, 4:54 PM CDTSevere Thunderstorm WarningBMXWinston36 min
Aug 20, 4:58 PM CDTSevere Thunderstorm WarningBMXLee32 min
Aug 20, 5:01 PM CDTSevere Thunderstorm WarningBMXTallapoosa14 min
Aug 20, 5:01 PM CDTSevere Thunderstorm WarningBMXFranklin44 min
Aug 20, 5:03 PM CDTSevere Thunderstorm WarningBMXCalhoun, Etowah42 min
Aug 20, 5:05 PM CDTSevere Thunderstorm WarningBMXLawrence25 min
Aug 20, 5:08 PM CDTSevere Thunderstorm WarningBMXJefferson52 min
Aug 20, 5:18 PM CDTSevere Thunderstorm WarningBMXTalladega42 min
Aug 20, 5:21 PM CDTSevere Thunderstorm WarningBMXMacon39 min
Aug 20, 5:45 PM CDTFlash Flood WarningBMXCalhoun2 hr
Aug 20, 6:00 PM CDTSevere Thunderstorm WarningBMXMacon30 min
Aug 20, 6:12 PM CDTSevere Thunderstorm WarningBMXShelby63 min
Aug 20, 6:25 PM CDTSevere Thunderstorm WarningBMXMontgomery50 min
Aug 20, 6:33 PM CDTSevere Thunderstorm WarningBMXTalladega42 min
Aug 20, 6:36 PM CDTSevere Thunderstorm WarningBMXFayette, Lamar39 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2002Every severe thunderstorm warning in 2002

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.