Alert archive / Alabama / Tornado Warnings in 1990

Tornado Warning 15, NWS Mobile, AL

August 5, 1990Mobile County, Alabama

NWS Mobile, AL issued this tornado warning at Aug 5, 1990, 11:03 AM CDT for Mobile County, Alabama. It was in force for 27 min.

The area

The counties it named.

The facts

Issued
Aug 5, 1990, 11:03 AM CDT (16:03 UTC)
Expired
Aug 5, 1990, 11:30 AM CDT
In force
27 min
Issued by
NWS Mobile, AL
Area
Whole counties

County Mobile County, AL

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 4.1 hours before the alert went out and 152 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, Slidell Radar S, LA at 12:00Z on 1990-08-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1264 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, Slidell Radar S, LA at 12:00Z on 1990-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -4 square meters per square second.1939Sfc1 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
1264 J/kg
Mixed-layer CIN
-81 J/kg
Mixed-layer LCL
1199 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
-4 m²/s²
0-3 km storm-relative helicity
-11 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 KMOB 051604
TORMOB
ALC097-051630-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1103 AM CDT SUN AUG 5 1990
 
THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A
TORNADO AND SPECIAL MARINE WARNING EFFECTIVE UNTIL 1130 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHWEST ALABAMA
 
   ...SOUTHEASTERN MOBILE COUNTY
A WATER SPOUT WAS REPORTED IN MOBILE BAY...NORTH OF ALABAMA PORT...AT
1055 AM. IT WAS REPORTED TO BE MOVING TO THE WEST AND MAY MOVE ONSHORE
NEAR MON LOUIS ALABAMA DURING THE NEXT HALF HOUR.
 
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING.  AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH
OR LOiW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 5, 3:10 PM CDTSevere Thunderstorm WarningMOBEscambia50 min

Nearby

Tornado Warnings in Alabama, 1990Every tornado warning in 1990Tornadoes in 1990

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.