Alert archive / Alabama / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 377, NWS Birmingham, AL

July 21, 2003Jefferson County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jul 21, 2003, 4:59 PM CDT for Jefferson County, Alabama. It was in force for 46 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
Jul 21, 2003, 4:59 PM CDT (21:59 UTC)
Expired
Jul 21, 2003, 5:45 PM CDT
In force
46 min
Issued by
NWS Birmingham, AL
Area
Counties, with a storm outline in the text

County Jefferson County, AL

The radar

The Birmingham radar (KBMX), 53 km from the middle of the area, began a volume at 21:59 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

Birmingham, AL (KBMX), launched 12:00Z, 10.0 hours before the alert went out and 52 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 2003-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2335 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 2003-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 2 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
2335 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
677 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
2 m²/s²
0-3 km storm-relative helicity
28 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.

291 
WUUS54 KBMX 212159
SVRBHM
ALC073-212245-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
459 PM CDT MON JUL 21 2003

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  JEFFERSON COUNTY IN ALABAMA

* UNTIL 545 PM CDT

* AT 454 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM TRAFFORD TO 9 MILES NORTHWEST OF
  WEST JEFFERSON...MOVING SOUTHEAST AT 35 MPH.

* LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
BIRMINGHAM...BIRMINGHAM AIRPORT...FULTONDALE...GARDENDALE...
GRAYSVILLE...HOMEWOOD...HUEYTOWN...KIMBERLY...MINOR...MORRIS...
PINSON...SYLVAN SPRINGS...TRUSSVILLE AND WARRIOR.

STRONG DAMAGING WIND WILL KNOCK DOWN TREES AND POWER LINES...AND
DAMAGE BUILDINGS AND HOMES. TAKE COVER NOW. FIND SUBSTANTIAL
SHELTER...AVOID WINDOWS...VEHICLES AND MOBILE HOMES.

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

LAT...LON 3384 8678 3376 8694 3355 8719 3336 8702
          3348 8667 3367 8654

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 21, 3:01 PM CDTSevere Thunderstorm WarningBMXMarion59 min
Jul 21, 3:42 PM CDTSevere Thunderstorm WarningBMXWinston63 min
Jul 21, 4:00 PM CDTSevere Thunderstorm WarningBMXMarion45 min
Jul 21, 4:07 PM CDTSevere Thunderstorm WarningBMXLamar53 min
Jul 21, 4:20 PM CDTSevere Thunderstorm WarningBMXPickens, Sumter55 min
Jul 21, 4:27 PM CDTSevere Thunderstorm WarningBMXCherokee63 min
Jul 21, 4:37 PM CDTSevere Thunderstorm WarningBMXFayette68 min
Jul 21, 4:44 PM CDTSevere Thunderstorm WarningBMXChilton61 min
Jul 21, 5:13 PM CDTSevere Thunderstorm WarningBMXSumter62 min
Jul 21, 5:16 PM CDTSevere Thunderstorm WarningBMXShelby44 min
Jul 21, 5:20 PM CDTSevere Thunderstorm WarningBMXTuscaloosa40 min
Jul 21, 5:21 PM CDTSevere Thunderstorm WarningBMXGreene24 min
Jul 21, 5:24 PM CDTSevere Thunderstorm WarningBMXGreene51 min
Jul 21, 5:41 PM CDTSevere Thunderstorm WarningBMXBibb64 min
Jul 21, 5:46 PM CDTSevere Thunderstorm WarningBMXCleburne24 min
Jul 21, 5:46 PM CDTSevere Thunderstorm WarningBMXCalhoun, Etowah44 min
Jul 21, 5:55 PM CDTSevere Thunderstorm WarningBMXTuscaloosa35 min
Jul 21, 5:58 PM CDTSevere Thunderstorm WarningBMXHale47 min
Jul 21, 6:00 PM CDTSevere Thunderstorm WarningBMXShelby30 min
Jul 21, 6:03 PM CDTSevere Thunderstorm WarningBMXChilton, Marengo57 min
Jul 21, 6:11 PM CDTSevere Thunderstorm WarningBMXPerry64 min
Jul 21, 6:35 PM CDTSevere Thunderstorm WarningBMXCleburne25 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2003Every severe thunderstorm warning in 2003

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.