Alert archive / Alabama / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 85, NWS Mobile, AL

April 7, 2003Choctaw County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Apr 7, 2003, 6:46 AM CDT for Choctaw County, Alabama. It was in force for 44 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: Apr 7, 2003, 6:46 AM CDT (11:46 UTC)
Expired: Apr 7, 2003, 7:30 AM CDT
In force: 44 min
Issued by: NWS Mobile, AL
Area: Counties, with a storm outline in the text

County Choctaw County, AL

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 7, 2:55 AM CDT	Tornado Watch	SPC	4 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 11.8 hours before the alert went out and 165 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: 677 J/kg
Mixed-layer CIN: -71 J/kg
Mixed-layer LCL: 1007 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 133 m²/s²
0-3 km storm-relative helicity: 175 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

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

794 
WUUS54 KMOB 071146
SVRMOB
ALC023-071230-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
645 AM CDT MON APR 7 2003

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CHOCTAW COUNTY IN SOUTHWEST ALABAMA

* UNTIL 730 AM CDT

* AT 645 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 9 MILES NORTHWEST OF YANTLEY TO
  18 MILES WEST OF CYRIL...MOVING EAST AT 50 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  CYRIL BY 700 AM CDT
  YANTLEY...PUSHMATAHA BY 705 AM CDT
  LISMAN BY 710 AM CDT
  HALSELL...CROMWELL BY 715 AM CDT

STRONG DAMAGING WIND...LARGE HAIL...AND HEAVY RAIN ARE LIKELY WITH
THESE STORMS.  IF IN THE PATH OF THESE STORMS...TAKE COVER IN A
STURDY SHELTER UNTIL THE STORMS HAVE PASSED.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE
FOR DAMAGING WINDS IN EXCESS OF 55 MPH...LARGE HAIL...AND DEADLY
LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY
INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

LAT...LON 3240 8846 3228 8866 3221 8868 3216 8874
          3213 8805 3242 8778 3250 8777 3261 8757

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 6, 10:25 PM CDT	Tornado Warning	MOB	Choctaw	65 min
Apr 6, 11:19 PM CDT	Severe Thunderstorm Warning	MOB	Clarke	56 min
Apr 7, 12:29 AM CDT	Severe Thunderstorm Warning	MOB	Wilcox	46 min
Apr 7, 12:37 AM CDT	Tornado Warning	MOB	Wilcox	23 min
Apr 7, 1:03 AM CDT	Tornado Warning	MOB	Wilcox	42 min
Apr 7, 7:52 AM CDT	Severe Thunderstorm Warning	MOB	Wilcox	53 min
Apr 7, 1:17 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	28 min
Apr 7, 3:42 PM CDT	Severe Thunderstorm Warning	MOB	Covington	48 min
Apr 7, 5:23 PM CDT	Flash Flood Warning	MOB	Baldwin	3 hr

Nearby

Severe Thunderstorm Warnings in Alabama, 2003 Every 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.