Alert archive / Alabama / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 133, NWS Mobile, AL

December 7, 2004Washington County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Dec 7, 2004, 7:24 AM CST for Washington County, Alabama. It was in force for 36 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: Dec 7, 2004, 7:24 AM CST (13:24 UTC)
Expired: Dec 7, 2004, 8:00 AM CST
In force: 36 min
Issued by: NWS Mobile, AL
Area: Counties, with a storm outline in the text

County Washington County, AL

The radar

The Mobile radar (KMOB), 88 km from the middle of the area, began a volume at 13:26 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 1.4 hours before the alert went out and 200 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 329 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 691 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 313 m²/s²
0-3 km storm-relative helicity: 354 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KMOB 071324
SVRMOB
ALC129-071400-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
724 AM CST TUE DEC 7 2004

THE NATIONAL WEATHER SERVICE IN MOBILE HAS REISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  WASHINGTON COUNTY IN SOUTHWEST ALABAMA

* UNTIL 800 AM CST

* AT 720 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS.  THESE STORMS WERE LOCATED ALONG A
  LINE EXTENDING FROM 17 MILES NORTH OF TIBBIE TO 6 MILES WEST OF
  VINEGAR BEND...OR ALONG A LINE EXTENDING FROM 11 MILES NORTH OF
  CHATOM TO 11 MILES NORTHEAST OF LEAKESVILLE...AND MOVING SOUTH AT
  30 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  VINEGAR BEND AND TIBBIE BY 740 AM CST
  SEABOARD BY 755 AM CST
  TOPTON AND HAWTHORN BY 800 AM CST

THESE ARE DANGEROUS STORMS. IF YOU ARE IN THE PATH...PREPARE FOR
DAMAGING WINDS...LARGE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING.
TAKE COVER IN A STURDY SHELTER UNTIL THESE STORMS HAVE PASSED.

LAT...LON 3167 8812 3121 8838 3122 8808 3156 8809

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 7, 5:05 AM CST	Severe Thunderstorm Warning	MOB	Choctaw	55 min
Dec 7, 6:03 AM CST	Severe Thunderstorm Warning	MOB	Choctaw, Clarke	57 min
Dec 7, 6:24 AM CST	Severe Thunderstorm Warning	MOB	Washington	51 min
Dec 7, 7:30 AM CST	Severe Thunderstorm Warning	MOB	Clarke	45 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2004 Every severe thunderstorm warning in 2004

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.