Alert archive / Mississippi / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 429, NWS Jackson, MS

July 11, 1997Simpson County, Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Jul 11, 1997, 4:31 PM CDT for Simpson County, Mississippi. It was in force for 44 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jul 11, 1997, 4:31 PM CDT (21:31 UTC)
Expired
Jul 11, 1997, 5:15 PM CDT
In force
44 min
Issued by
NWS Jackson, MS
Area
Whole counties

County Simpson County, MS

What was reported inside it

TimeReportWhereRemark
Jul 11, 5:00 PM CDTThunderstorm WindMagee, MSSeveral trees were blown down.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 9.5 hours before the alert went out and 48 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.

000 
TTAA00 KJAN 112133 RRA
SVRJAN
MSC127-112215-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
431 PM CDT FRI JUL 11 1997
 
THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  515 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN CENTRAL MISSISSIPPI
 
   ...SIMPSON COUNTY
 
AT 431 DOPPLER RADAR IN JACKSON INDICATED A BAND OF SEVERE THUNDERSTORMS
FROM 7 MILES SOUTWEST OF MAGEE TO 3 MILES NORTHEAST OF MENDENHALL. THE
STORMS WERE MOVING SOUTH AT 10 MPH.
 
 
SEVERE THUNDERSTORMS PRODUCE WIND IN EXCESS OF 55 MPH...LARGE
HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.  MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF YtOUR HOME OR BUSINESS.
<
 
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, 4:57 PM CDTSevere Thunderstorm WarningJANJefferson Davis48 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.