Alert archive / Alabama / Tornado Warnings in 1991

Tornado Warning 8, NWS Mobile, AL

April 29, 1991Clarke County, Alabama

NWS Mobile, AL issued this tornado warning at Apr 29, 1991, 11:13 AM CDT for Clarke County, Alabama. It was in force for 32 min.

The area

The counties it named.

The facts

Issued
Apr 29, 1991, 11:13 AM CDT (16:13 UTC)
Expired
Apr 29, 1991, 11:45 AM CDT
In force
32 min
Issued by
NWS Mobile, AL
Area
Whole counties

County Clarke County, AL

The nearest sounding before it

Centreville/Bibb, AL (KCKL), launched 12:00Z, 4.2 hours before the alert went out and 148 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, Centreville/Bibb, AL at 12:00Z on 1991-04-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1218 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, Centreville/Bibb, AL at 12:00Z on 1991-04-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 357 square meters per square second.19395878Sfc1 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
1218 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
639 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
357 m²/s²
0-3 km storm-relative helicity
397 m²/s²
Significant tornado parameter
3.0
Supercell composite
10.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMOB 291613
TORMOB
ALC025-291645-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1113 AM CDT MON APR 29 1991
 
THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL 1145 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHWEST ALABAMA
 
   ...CLARKE COUNTY
 
AT 1111 AM THE MOBILE RADAR INDICATED A POSSIBLE TORNADO 4 MILES
SOUTHWEST OF GROVE HILL MOVING TOWARD THE NORTHEAST AT 35 MPH.
 
RESIDENTS IN GROVE HILL AND FULTON SHOULD SEEK IMMEDIATE SHELTER.
 
IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A
BASEMENT.  GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE.
IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM
SUCH AS A CLOSET ON THE LOWEST FLOOR.  USE BLANKETS...PILLOWS...
OR CUSHIONS TO COVER YOUR BODY.  AVOID WINDOWS.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 29, 11:13 AM CDTTornado WarningMOBLowndes62 min
Apr 29, 11:29 AM CDTSevere Thunderstorm WarningMOBAutauga46 min
Apr 29, 11:51 AM CDTTornado WarningMOBMontgomery54 min
Apr 29, 12:49 PM CDTSevere Thunderstorm WarningMOBCrenshaw56 min
Apr 29, 1:04 PM CDTSevere Thunderstorm WarningMOBButler56 min
Apr 29, 1:28 PM CDTSevere Thunderstorm WarningMOBBaldwin, Mobile62 min
Apr 29, 1:28 PM CDTSevere Thunderstorm WarningMOBMacon62 min
Apr 29, 2:35 PM CDTSevere Thunderstorm WarningMOBBaldwin, Mobile55 min
Apr 29, 3:19 PM CDTTornado WarningMOBBaldwin11 min

Nearby

Tornado Warnings in Alabama, 1991Every tornado warning in 1991Tornadoes 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; the sounding from the Mesonet's radiosonde archive.