Alert archive / Mississippi / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 69, NWS Mobile, AL

February 21, 1997George County, Mississippi

NWS Mobile, AL issued this severe thunderstorm warning at Feb 21, 1997, 8:58 AM CST for George County, Mississippi. It was in force for 62 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
Feb 21, 1997, 8:58 AM CST (14:58 UTC)
Expired
Feb 21, 1997, 10:00 AM CST
In force
62 min
Issued by
NWS Mobile, AL
Area
Whole counties

County George County, MS

The radar

The Mobile radar (KMOB), 44 km from the middle of the area, began a volume at 15:00 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 3.0 hours before the alert went out and 122 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 1997-02-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 535 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 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 1997-02-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 349 square meters per square second.1939587897Sfc1 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
535 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
510 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
349 m²/s²
0-3 km storm-relative helicity
398 m²/s²
Significant tornado parameter
0.9
Supercell composite
5.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMOB 211500 RRA
SVRMOB
MSC039-211600-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOBILE AL
858 AM CST FRI FEB 21 1997
 
THE NATIONAL WEATHER SERVICE IN MOBILE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1000 AM CST
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHEAST MISSISSIPPI
 
   ...GEORGE COUNTY
 
AT 856 AM CST MOBILE DOPPLER WEATHER RADAR SHOWED ANOTHER SEVERE
THUNDERSTORM MOVING INTO GEORGE COUNTY FROM THE WEST. THE MAIN THREAT
FROM THIS STORM WILL BE DAMAGING WINDS. THE STORM WILL TRACK SLOWLY EAST
AND WILL BE AFFECTING MOST OF THE COUNTY DURING THE NEXT HOUR.
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER
SEVERE 8THUNDERSTORMS 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
Feb 21, 5:57 AM CSTSevere Thunderstorm WarningMOBPerry, Stone, Wayne63 min
Feb 21, 7:03 AM CSTSevere Thunderstorm WarningMOBPerry, Stone57 min
Feb 21, 7:03 AM CSTSevere Thunderstorm WarningMOBGreene, Wayne57 min
Feb 21, 8:01 AM CSTSevere Thunderstorm WarningMOBGeorge, Greene59 min
Feb 21, 8:01 AM CSTSevere Thunderstorm WarningMOBStone59 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 1997Every severe thunderstorm warning in 1997

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; radar from the NEXRAD Level II archive.