Alert archive / Mississippi / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 271, NWS New Orleans, LA

September 1, 1997Jackson County, Mississippi

NWS New Orleans, LA issued this severe thunderstorm warning at Sep 1, 1997, 2:28 PM CDT for Jackson County, Mississippi. It was in force for 47 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
Sep 1, 1997, 2:28 PM CDT (19:28 UTC)
Expired
Sep 1, 1997, 3:15 PM CDT
In force
47 min
Issued by
NWS New Orleans, LA
Area
Whole counties

County Jackson County, MS

The radar

The Mobile radar (KMOB), 44 km from the middle of the area, began a volume at 19:30 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.

What was reported inside it

TimeReportWhereRemark
Sep 1, 2:43 PM CDTHail 0.75Wade, MSDime size hail was reported by the Sheriff's Office.

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

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.5 hours before the alert went out and 106 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 1997-09-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 753 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 1997-09-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 square meters per square second.193958Sfc1 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
753 J/kg
Mixed-layer CIN
-96 J/kg
Mixed-layer LCL
1130 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
17 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 KNEW 011929 RRA
SVRNEW
MSC059-012015-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
228 PM CDT MON SEP 1 1997
 
THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  315 PM CDT
FOR RESIDENTS IN THE FOLLOWING LOCATION...
 
IN SOUTH MISSISSIPPI
 
   ...JACKSON COUNTY
 
AT 230PM NATIONAL WEATHER SERVICE RADAR IN SLIDELL INDICATED A SEVERE
THUNDERSTORM FORMING OVER JACKSON COUNTY ALONG HIGHWAY 63 SOUTH OF
THREE RIVERS. THE STORM IS MOVING TOWARDS THE SOUTHWEST AT 10 MPH.
 
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Sep 1, 9:59 AM CDT, 4 hours 29 minutes before
LAZ034>040-046>049-056>070-MSZ068>071-080>082-021600-

THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE NEW ORLEANS/BATON ROUGE LA
1000 AM CDT MON SEP 1 1997

AN UPPER LEVEL LOW PRESSURE TROUGH EXTENDS FROM THE MOUTH OF THE
MISSISSIPPI RIVER TO THE NORTHEAST. THE AIRMASS REMAINS MOIST AND
UNSTABLE. WINDS ALOFT CONTINUE TO BE WEAK. EXPECT SCATTERED
THUNDERSTROMS TO DEVELOPE THIS AFTERNOON AND CONTINUE INTO THE EVENING
HOURS. A FEW OF THESE THUNDERSTROMS COULD BECOME SEVERE WITH STRONG
GUSTY WINDS.. HAIL.. HEAVY RAINFALL.. AND FREQUENT LIGHTNNG.
Special weather statement, Sep 1, 10:00 AM CDT, 4 hours 28 minutes before
LAZ034>040-046>049-056>070-MSZ068>071-080>082-021600-

THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE NEW ORLEANS/BATON ROUGE LA
1000 AM CDT MON SEP 1 1997

AN UPPER LEVEL LOW PRESSURE TROUGH EXTENDS FROM THE MOUTH OF THE
MISSISSIPPI RIVER TO THE NORTHEAST. THE AIRMASS REMAINS MOIST AND
UNSTABLE. WINDS ALOFT CONTINUE TO BE WEAK. EXPECT SCATTERED
THUNDERSTROMS TO DEVELOPE THIS AFTERNOON AND CONTINUE INTO THE EVENING
HOURS. A FEW OF THESE THUNDERSTROMS COULD BECOME SEVERE WITH STRONG
GUSTY WINDS.. HAIL.. HEAVY RAINFALL.. AND FREQUENT LIGHTNNG.
Local storm report, Sep 1, 11:40 AM CDT, 2 hours 48 minutes before
PRELIMINARY LOCAL STORM REPORT...DELAYED
NATIONAL WEATHER SERVICE NEW ORLEANS LOUISIANA
1140 AM CDT MON SEP 01 1997

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....PARISH LOCATION....

0415 PM    BOGALUSA                  LA   WIND DAMAGE
08/31/97   WASHINGTON                     *** 1 DEAD ***
                                          SEVERAL LARGE TREES BLOWN
                                          BLOWN DOWN. ONE TREE LANDED
                                          ON CAR KILLING OCCUPANT.
                                          ROOF BLOWN OFF BUSINESS.

0415PM     BOGULUSA                  LA   1 INCH HAIL
08/31/97   WASHINGTON

0430 PM    SLIDELL                   LA   1 INCH HAIL
08/31/97   ST TAMMANY                     QUARTER SIZE HAIL REPORTED
                                          IN SLIDELL.
Local storm report, Sep 1, 11:48 AM CDT, 2 hours 40 minutes before
PRELIMINARY LOCAL STORM REPORT...DELAYED
NATIONAL WEATHER SERVICE NEW ORLEANS LOUISIANA
1140 AM CDT MON SEP 01 1997

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....PARISH LOCATION....

0415 PM    BOGALUSA                  LA   WIND DAMAGE
08/31/97   WASHINGTON                     *** 1 DEAD ***
                                          SEVERAL LARGE TREES BLOWN
                                          BLOWN DOWN. ONE TREE LANDED
                                          ON CAR KILLING OCCUPANT.
                                          ROOF BLOWN OFF BUSINESS.

0415PM     BOGULUSA                  LA   1 INCH HAIL
08/31/97   WASHINGTON

0430 PM    SLIDELL                   LA   1 INCH HAIL
08/31/97   ST TAMMANY                     QUARTER SIZE HAIL REPORTED
                                          IN SLIDELL.

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 1, 3:15 PM CDTSevere Thunderstorm WarningLIXHarrison45 min
Sep 1, 3:30 PM CDTSevere Thunderstorm WarningLIXHancock, Harrison45 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; radar from the NEXRAD Level II archive.