Alert archive / Mississippi / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 3, NWS Mobile, AL

March 1, 1991Harrison County, Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Mar 1, 1991, 6:35 AM CST for Harrison County, Mississippi. It was in force for 25 min.

The area

The counties it named.

The facts

Issued
Mar 1, 1991, 6:35 AM CST (12:35 UTC)
Expired
Mar 1, 1991, 7:00 AM CST
In force
25 min
Issued by
NWS Mobile, AL
Area
Whole counties

County Harrison County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 0.6 hours before the alert went out and 62 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 1991-03-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 60 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 1991-03-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 348 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
60 J/kg
Mixed-layer CIN
-97 J/kg
Mixed-layer LCL
582 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
348 m²/s²
0-3 km storm-relative helicity
409 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMOB 011242 COR
SVRMOB
MSC047-011300-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING CORRECTION
NATIONAL WEATHER SERVICE MOBILE AL
640 AM CST FRI MAR 1 1991

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  700 AM CST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...

IN SOUTHEAST MISSISSIPPI

   ...HARRISON COUNTY

AT 630 AM AN AIR TRAFFIC CONTROLLER REPORTED 2 INCHES OF MOTH-BALL
SIZED HAIL HAD FALLEN ON HIS HOME IN THE NORTH PART OF GULFPORT
MISSISSIPPI. THE STORM WAS MOVING RAPIDLY TO THE NORTH.

A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.  REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 1, 11:27 AM CSTSevere Thunderstorm WarningMOBGeorge, Jackson63 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 1991Every 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; the sounding from the Mesonet's radiosonde archive.