Alert archive / Mississippi / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 13, NWS Mobile, AL

January 9, 1999George County, Mississippi; Mobile County, Alabama

NWS Mobile, AL issued this severe thunderstorm warning at Jan 9, 1999, 3:43 AM CST for George County, Mississippi; Mobile County, Alabama. It was in force for 77 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jan 9, 1999, 3:43 AM CST (09:43 UTC)
Expired
Jan 9, 1999, 5:00 AM CST
In force
77 min
Issued by
NWS Mobile, AL
Area
Whole counties

Counties Mobile County, AL, George County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 9.7 hours before the alert went out and 136 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 00:00Z on 1999-01-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 5 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 1999-01-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 88 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
5 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
1095 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
88 m²/s²
0-3 km storm-relative helicity
174 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 090943 RRA
SVRMOB
ALC003-097-MSC039-091100-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
343 AM CST SAT JAN 9 1999

THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BALDWIN COUNTY IN SOUTHWESTERN ALABAMA
  NORTH CENTRAL MOBILE COUNTY IN SOUTHWESTERN ALABAMA
  GEORGE COUNTY IN SOUTHEASTERN MISSISSIPPI

* UNTIL 500 AM CST

* AT 339 AM CST... A DEVELOPING LINE OF SEVERE THUNDERSTORMS
CONTAINING LARGE HAIL WAS FORMING FROM NORTHEAST BALDWIN COUNTY WEST
TO NEAR GULFPORT MISSISSIPPI.

*THIS LINE OF STORMS WILL MOVE SLOWLY SOUTH THROUGH 430 AM...AFFECTING
MAINLY THE NORTH AND CENTRAL PORTIONS OF MOBILE AND BALDWIN COUNTIES
AND THE SOUTHEAST PORTION OF GEORGE COUNTY. INDIVIDUAL STORMS WILL MOVE
EAST AROUND 30 MPH ALONG THE LINE.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.L FOR YOUR
PROTECTION...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 9, 3:43 AM CSTSevere Thunderstorm WarningMOBBaldwin77 min
Jan 9, 4:27 AM CSTSevere Thunderstorm WarningMOBMobile63 min
Jan 9, 4:49 AM CSTSevere Thunderstorm WarningMOBBaldwin, Escambia71 min
Jan 9, 6:06 AM CSTSevere Thunderstorm WarningMOBBaldwin54 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 1999Severe Thunderstorm Warnings in Alabama, 1999Every severe thunderstorm warning in 1999

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.