Alert archive / Alabama / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 83, NWS Mobile, AL

June 5, 1991Dallas County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Jun 5, 1991, 4:56 PM CDT for Dallas County, Alabama. It was in force for 64 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jun 5, 1991, 4:56 PM CDT (21:56 UTC)
Expired: Jun 5, 1991, 6:00 PM CDT
In force: 64 min
Issued by: NWS Mobile, AL
Area: Whole counties

County Dallas County, AL

What was reported inside it

Time	Report	Where	Remark
Jun 5, 5:20 PM CDT	Thunderstorm Wind 0	Dallas, AL

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Centreville/Bibb, AL (KCKL), launched 12:00Z, 9.9 hours before the alert went out and 64 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: 211 J/kg
Mixed-layer CIN: -124 J/kg
Mixed-layer LCL: 905 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 13 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 
TTAA00 KMGM 052159
SVRMGM
ALC047-052300-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MONTGOMERY AL
456 PM CDT WED JUN 5 1991
 
THE NATIONAL WEATHER SERVICE IN MONTGOMERY HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  600 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTH ALABAMA
 
   ...DALLAS COUNTY
 
WEATHER RADAR AT MONTGOMERY SHOWED A SEVERE THUNDERSTORM 4 MILES WEST
OF SELMA ALABAMA MOVING SLOWLY SOUTH.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD R&OADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Local storm report, Jun 5, 4:50 PM CDT, 6 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE MOBILE AL
447 PM CDT WED JUN 5 1991

TIME             EVENT
340 PM CDT       HARRISON SO MISSISSIPPI REPORTED MARBLE SIZE HAIL.

352 PM CDT       PUBLIC REPORTS TREES DOWN NORTH OF KILN
                 HARRISON COUNTY

440 PM CDT       HARRISON CD REPORTED TREES DOWN AND A TIN ROOF
                 OFF A BUILDING IN NORTH BILOXI.  REPORTED AS AN
                 UNCONFIRMED TORNADO.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 5, 5:17 PM CDT	Severe Thunderstorm Warning	MOB	Mobile	58 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1991 Every severe thunderstorm warning in 1991

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.