Alert archive / Louisiana / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 466, NWS Jackson, MS

October 21, 1997Morehouse Parish, Louisiana

NWS Jackson, MS issued this severe thunderstorm warning at Oct 21, 1997, 12:41 PM CDT for Morehouse Parish, Louisiana. It was in force for 49 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
Oct 21, 1997, 12:41 PM CDT (17:41 UTC)
Expired
Oct 21, 1997, 1:30 PM CDT
In force
49 min
Issued by
NWS Jackson, MS
Area
Whole counties

County Morehouse Parish, LA

What was reported inside it

TimeReportWhereRemark
Oct 21, 12:50 PM CDTHail 0.75Bastrop, LA

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, 5.7 hours before the alert went out and 171 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 1997-10-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 255 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 1997-10-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 122 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
255 J/kg
Mixed-layer CIN
-68 J/kg
Mixed-layer LCL
1005 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
122 m²/s²
0-3 km storm-relative helicity
95 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 211742 RRA
SVRJAN
LAC067-211830-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
1241 PM CDT TUE OCT 21 1997
 
THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  130 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTHEAST LOUISIANA
 
   ...MOREHOUSE PARISH
 
AT 1240 PM A SEVERE THUNDERSTORM WAS INDICATED NEAR BASTROP MOVING
SOUTHEAST AT 15 MPH. THIS STORM WILL AFFECT MUCH OF BASTROP AND
POSSIBLY THE MER ROUGE AREA BY 100 PM.
 
 
PEOPLE NEAR THE STORM SHOULD MOVE INSIDE A STRONG BUILDING AWAY
FROM WINDOWS.  DON'T USE TELEPHONES OR ELECTRICAL APPLIANCES UNTIL
THE STORM HAS PASSED.  MOTORISTS DONN'T DRIVE INTO WATER CROSSINGS.
<
77

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, Oct 21, 10:25 AM CDT, 2 hours 16 minutes before
ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>029-032>066-
072>074-220400-

AREA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE JACKSON MS
1025 AM CDT TUE OCT 21 1997

SCATTERED THUNDERSTORMS ARE EXPECTED THROUGH TONIGHT AS A COLD FRONT
MOVES SOUTHEASTWARD ACROSS THE AREA. MOST OF THE STORMS SHOULD REMAIN
ALONG AND JUST BEHIND THE FRONT SINCE THE AIRMASS REMAINED RATHER DRY
AHEAD OF IT.  DUE TO LIMITED INSTABILITY AND WEAK LOW LEVEL WINDS...
NO SEVERE WEATHER IS EXPECTED.   HOWEVER...ISOLATED STRONG STORMS ARE
LIKELY WITH FREQUENT LIGHTNING STRIKES...GUSTY WINDS AND BRIEF HEAVY
RAINS AND THE STORMS WILL GENERALLY BE MOVING EAST AT 30 TO 40 MPH.

ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND EMERGENCY
MANAGEMENT PERSONNEL SHOULD NOT BE REQUIRED THROUGH TONIGHT.

FOR MORE WEATHER INFORMATION...PLEASE VISIT OUR INTERNET SITE ONTHE
WORLD WIDE WEB AT - HTTP:/WWW.JANNWS.STATE.MS.US/  (IN LOWE CASE).
Special weather statement, Oct 21, 10:28 AM CDT, 2 hours 13 minutes before
ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>029-032>066-
072>074-220400-

AREA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE JACKSON MS
1025 AM CDT TUE OCT 21 1997

SCATTERED THUNDERSTORMS ARE EXPECTED THROUGH TONIGHT AS A COLD FRONT
MOVES SOUTHEASTWARD ACROSS THE AREA. MOST OF THE STORMS SHOULD REMAIN
ALONG AND JUST BEHIND THE FRONT SINCE THE AIRMASS REMAINED RATHER DRY
AHEAD OF IT.  DUE TO LIMITED INSTABILITY AND WEAK LOW LEVEL WINDS...
NO SEVERE WEATHER IS EXPECTED.   HOWEVER...ISOLATED STRONG STORMS ARE
LIKELY WITH FREQUENT LIGHTNING STRIKES...GUSTY WINDS AND BRIEF HEAVY
RAINS AND THE STORMS WILL GENERALLY BE MOVING EAST AT 30 TO 40 MPH.

ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND EMERGENCY
MANAGEMENT PERSONNEL SHOULD NOT BE REQUIRED THROUGH TONIGHT.

FOR MORE WEATHER INFORMATION...PLEASE VISIT OUR INTERNET SITE ONTHE
WORLD WIDE WEB AT - HTTP:/WWW.JANNWS.STATE.MS.US/  (IN LOWE CASE).

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 21, 1:51 PM CDTSevere Thunderstorm WarningJANWest Carroll39 min
Oct 21, 2:11 PM CDTSevere Thunderstorm WarningJANEast Carroll34 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 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.