Alert archive / Louisiana / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 165, NWS Jackson, MS

April 22, 1997Morehouse Parish, Louisiana; Ashley County, Arkansas

NWS Jackson, MS issued this severe thunderstorm warning at Apr 22, 1997, 9:55 AM CDT for Morehouse Parish, Louisiana; Ashley County, Arkansas. It was in force for 35 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
Apr 22, 1997, 9:55 AM CDT (14:55 UTC)
Expired
Apr 22, 1997, 10:30 AM CDT
In force
35 min
Issued by
NWS Jackson, MS
Area
Whole counties

Counties Ashley County, AR, Morehouse Parish, LA

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 22, 8:45 AM CDTTornado WatchSPC6 hr
Apr 22, 5:00 AM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 2.9 hours before the alert went out and 177 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 1997-04-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1284 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 1997-04-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 62 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
1284 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
525 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
62 m²/s²
0-3 km storm-relative helicity
259 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KJAN 221456 RRA
SVRJAN
ARC003-LAC067-221530-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
955 AM CDT TUE APR 22 1997
 
THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1030 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHEAST ARKANSAS
 
   ...SOUTHERN ASHLEY COUNTY
 
 
IN NORTHEAST LOUISIANA
 
   ...EASTERN MOREHOUSE PARISH
 
AT 955 AM WEATHER SERVICE RADAR SHOWED A LINE OF SEVERE THUNDERSTORMS
EXTENDING FROM 5 MILES SOUTH OF HAMBURG ARKANSAS TO 5 MILES EAST OF
BASTROP LOUISIANA...MOVING EAST AT 35 MPH.  DAMAGING WINDS AND HAIL
UP TO THE SIZE OF QUARTERS ARE LIKELY WITH THESE STORMS.
 
&A TORNADO WATCH IS ALSO IN EFFECT.  REMEMBER SEVERE THUNDERSTORMS
CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING.  REMAIN
CALM BUT BE ALERT TO RAPIDLY CHANGING WEATHER CONDITIONS.
<
 
 
75

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, Apr 22, 5:05 AM CDT, 4 hours 50 minutes before
ARZ074-075-LAZ007>009-015-016-023>026-MSZ001>067-072>076-078-079-
222200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
505 AM CDT TUE APR 22 1997

...THREAT OF SEVERE WEATHER FOR MISSISSIPPI...NORTHEAST LOUISIANA AND
SOUTHEAST ARKANSAS TODAY...

EARLY THIS MORNING A STATIONARY FRONT EXTENDED ACROSS NORTHERN
MISSISSIPPI AND ALONG THE ARKANSAS...LOUISIANA BORDER. LOW PRESSURE
WILL DEVELOP AND MOVE ALONG THIS FRONT THIS AFTERNOON. THE COMBINATION
OF THE LOW PRESSURE SYSTEM MOVING ALONG THE FRONT...A STRONG UPPER
LEVEL WEATHER DISTURBANCE APPROACHING THE AREA FROM THE WEST...AND
MOIST AND UNSTABLE AIR ACROSS THE REGION...WILL SET THE STAGE FOR
SEVERE THUNDERSTORMS ACROSS THE AREA TODAY AND POSSIBLY INTO TONIGHT.

SEVERE THUNDERSTORMS HAVE ALREADY BEEN OCCURRING JUST TO THE WEST OF
THE AREA OVERNIGHT...AND A SEVERE THUNDERSTORM WATCH IS NOW IN EFFECT
FOR ASHLEY COUNTY AR AND MOREHOUSE PARISH LA UNTIL 11 AM.
THUNDERSTORMS WILL BE ON THE INCREASE FROM THE WEST ACROSS THE AREA
TODAY...AND WILL CONTINUE INTO AT LEAST THE EARLY PART OF TONIGHT.

SOME OF THESE STORMS WILL LIKELY BECOME SEVERE. THE MAIN THREAT FROM
THIS SEVERE WEATHER EPISODE LOOKS TO BE LARGE HAIL...WITH SOME THREAT
FOR DAMAGING WINDS. IN ADDITION...HEAVY RAINFALL WILL OCCUR WITH THE
STORMS...AND VERY HEAVY RAINFALL TOTALS MAY OCCUR IN AREAS WHERE
SEVERAL THUNDERSTORMS TRAIN ACROSS THE SAME AREA. SOME LOCALIZED
FLOODING IS POSSIBLE.

PEOPLE THROUGHOUT MISSISSIPPI...NORTHEAST LOUISIANA AND SOUTHEAST
ARKANSAS SHOULD KEEP UP TO DATE ON THE WEATHER TODAY AND LISTEN FOR
LATER WATCHES OR WARNINGS. HAM RADIO OPERATORS AND EMERGENCY
MANAGEMENT PERSONNEL MAY BE REQUIRED TO ASSIST IN THE DETECTION OF
SEVERE WEATHER TODAY.
Special weather statement, Apr 22, 5:07 AM CDT, 4 hours 48 minutes before
ARZ074-075-LAZ007>009-015-016-023>026-MSZ001>067-072>076-078-079-
222200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
505 AM CDT TUE APR 22 1997

...THREAT OF SEVERE WEATHER FOR MISSISSIPPI...NORTHEAST LOUISIANA AND
SOUTHEAST ARKANSAS TODAY...

EARLY THIS MORNING A STATIONARY FRONT EXTENDED ACROSS NORTHERN
MISSISSIPPI AND ALONG THE ARKANSAS...LOUISIANA BORDER. LOW PRESSURE
WILL DEVELOP AND MOVE ALONG THIS FRONT THIS AFTERNOON. THE COMBINATION
OF THE LOW PRESSURE SYSTEM MOVING ALONG THE FRONT...A STRONG UPPER
LEVEL WEATHER DISTURBANCE APPROACHING THE AREA FROM THE WEST...AND
MOIST AND UNSTABLE AIR ACROSS THE REGION...WILL SET THE STAGE FOR
SEVERE THUNDERSTORMS ACROSS THE AREA TODAY AND POSSIBLY INTO TONIGHT.

SEVERE THUNDERSTORMS HAVE ALREADY BEEN OCCURRING JUST TO THE WEST OF
THE AREA OVERNIGHT...AND A SEVERE THUNDERSTORM WATCH IS NOW IN EFFECT
FOR ASHLEY COUNTY AR AND MOREHOUSE PARISH LA UNTIL 11 AM.
THUNDERSTORMS WILL BE ON THE INCREASE FROM THE WEST ACROSS THE AREA
TODAY...AND WILL CONTINUE INTO AT LEAST THE EARLY PART OF TONIGHT.

SOME OF THESE STORMS WILL LIKELY BECOME SEVERE. THE MAIN THREAT FROM
THIS SEVERE WEATHER EPISODE LOOKS TO BE LARGE HAIL...WITH SOME THREAT
FOR DAMAGING WINDS. IN ADDITION...HEAVY RAINFALL WILL OCCUR WITH THE
STORMS...AND VERY HEAVY RAINFALL TOTALS MAY OCCUR IN AREAS WHERE
SEVERAL THUNDERSTORMS TRAIN ACROSS THE SAME AREA. SOME LOCALIZED
FLOODING IS POSSIBLE.

PEOPLE THROUGHOUT MISSISSIPPI...NORTHEAST LOUISIANA AND SOUTHEAST
ARKANSAS SHOULD KEEP UP TO DATE ON THE WEATHER TODAY AND LISTEN FOR
LATER WATCHES OR WARNINGS. HAM RADIO OPERATORS AND EMERGENCY
MANAGEMENT PERSONNEL MAY BE REQUIRED TO ASSIST IN THE DETECTION. OF
SEVERE WEATHER TODAY.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 22, 9:10 AM CDTSevere Thunderstorm WarningJANMorehouse50 min
Apr 22, 9:38 AM CDTSevere Thunderstorm WarningJANRichland52 min
Apr 22, 10:00 AM CDTSevere Thunderstorm WarningJANWest Carroll45 min
Apr 22, 10:02 AM CDTSevere Thunderstorm WarningJANFranklin43 min
Apr 22, 10:18 AM CDTSevere Thunderstorm WarningJANMadison42 min
Apr 22, 10:20 AM CDTSevere Thunderstorm WarningJANEast Carroll40 min
Apr 22, 10:22 AM CDTSevere Thunderstorm WarningJANCatahoula53 min
Apr 22, 10:36 AM CDTSevere Thunderstorm WarningJANTensas54 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1997Severe Thunderstorm Warnings in Arkansas, 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.