Alert archive / Mississippi / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 430, NWS Jackson, MS

July 11, 1997Jefferson Davis County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Jul 11, 1997, 4:57 PM CDT for Jefferson Davis County, Mississippi. It was in force for 48 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
Jul 11, 1997, 4:57 PM CDT (21:57 UTC)
Expired
Jul 11, 1997, 5:45 PM CDT
In force
48 min
Issued by
NWS Jackson, MS
Area
Whole counties

County Jefferson Davis County, MS

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 10.0 hours before the alert went out and 87 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, Jackson, MS at 12:00Z on 1997-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1868 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, Jackson, MS at 12:00Z on 1997-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 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
1868 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
859 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
35 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.

130 
WUUS1 KJAN 112207 RRA
SVRJAN
MSC065-112245-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
457 PM CDT FRI JUL 11 1997

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  545 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTH CENTRAL MISSISSIPPI

   ...JEFFERSON DAVIS COUNTY

AT 456 PM DOPPLER RADAR IN JACKSON INDICATED A SEVERE THUNDERSTORM ABOUT
12 MILES NORTH OF PRENTISS. OTHER STRONG STORMS WERE OCCURRING NEAR
PRENTISS. THE STORMS ARE MOVING SOUTH AT 15 MPH. HAIL TO SIZE OF
QUARTERS AND DAMAGING WINDS ARE POSSIBLE WITH THESE STORMS.

IF YOU ARE OUTSIDE...SEEK SHELTER IN A STRONG BUILDING AWAY FROM
WINDOWS.  DAMAGING WINDS...LARGE HAIL...VERY HEAVY RAIN...AND
DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
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65

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 10, 7:50 PM CDTSevere Thunderstorm WarningJANHinds40 min
Jul 11, 2:29 PM CDTSevere Thunderstorm WarningJANWashington31 min
Jul 11, 4:31 PM CDTSevere Thunderstorm WarningJANSimpson44 min
Jul 11, 5:23 PM CDTSevere Thunderstorm WarningJANCopiah, Hinds37 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.