Alert archive / Louisiana / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 151, NWS Shreveport, LA

April 26, 1997Natchitoches Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Apr 26, 1997, 1:39 AM CDT for Natchitoches Parish, Louisiana. It was in force for 51 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: Apr 26, 1997, 1:39 AM CDT (06:39 UTC)
Expired: Apr 26, 1997, 2:30 AM CDT
In force: 51 min
Issued by: NWS Shreveport, LA
Area: Whole counties

County Natchitoches Parish, LA

What was reported inside it

Time	Report	Where	Remark
Apr 26, 1:42 AM CDT	Hail 1.75	Robeline, 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

Shreveport, LA (KSHV), launched 00:00Z, 6.7 hours before the alert went out and 104 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 572 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 441 m²/s²
0-3 km storm-relative helicity: 966 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSHV 260639 RRA
SVRSHV
LAC069-260730-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
139 AM CDT SAT APR 26 1997
 
THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  230 AM CDT
FOR THE FOLLOWING AREA...
 
IN NORTHWEST LOUISIANA
 
   ...NATCHITOCHES PARISH
 
AT 137 AM CDT...DOPPLER RADAR IN SHREVEPORT DETECTED A SEVERE
THUNDERSTORM 10 MILES NORTHWEST OF NATCHITOCHES. THE STORM WAS MOVING TO
THE NORTHEAST AT 40 MPH AND WILL MOVE NEAR THE TOWN OF POWHATAN BY 155
AM.
 
HAIL TO THE SIZE OF GOLF BALLS IS LIKELY WITH THIS STORM AS IT CROSSES
NATCHITOCHES PARISH.
 
IF YOU ARE IN THE PATH OF THIS STORM...TAKE IMMEDIATE STEPS TO
PROTECT YOURSELF AND YOUR PROPERTY...SUCH AS YOUR CAR...BOAT...AND
PETS...FROM LARGE HAIL AND DAMAGING WIND.
 
18

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.

NWS Shreveport, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 25, 8:04 PM CDT, 5 hours 35 minutes earlier.

Area forecast discussion, Apr 25, 8:04 PM CDT, 5 hours 35 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
800 PM CDT FRI APR 25 1997

RAIN SLOWLY ENDING ACRS E TX ATTM AS S/WV LIFTS TO THE NE INTO SW AR
AND NRN LA. SHUD SEE A BREAK IN MOST OF THE RAIN LATER THIS EVNG BEFORE
ACTIVITY REDEVELOPS ERLY SAT AHEAD OF NEXT S/WV. STILL MAIN S/WV WILL
NOT BE COMING OUT UNTIL LATE SAT/ERLY SUN.

WILL LIKELY NEED TO DROP POPS DOWN SOME TONIGHT ACRS WRN PORTIONS OF
THE CWA WHERE RAIN IS ENDING. STILL NEED AT LEAST A CHC DUE TO POSSIBLE
DVPMT LATE TONIGHT OR ERLY TOMORROW MRNG. RAIN SHUD HOLD ON UNTIL AFTER
MIDNIGHT IN ERN PORTONS OF THE CWA THOUGH.

1 TO 2 INCHES OF RAIN HAS FALLEN ACRS MUCH OF E TX SO MIDNIGHT SHIFT
WILL LIKELY NEED TO LOOK |AT FFA FOR E TX FOR TOMORROW AND TOMORROW
NIGHT.

18

In the hours before

Local storm report, Apr 25, 10:15 PM CDT, 3 hours 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OFFICE SHREVEPORT LA
1015 PM CDT FRI APR 25 1997

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

0930 PM    SHREVEPORT                LA   NON TSTM WINDS
04/25/97   CADDO                          NUMEROUS TREES DOWN ACROSS
                                          THE CITY...SOME ON HOUSES

0950 PM    25 S TEXARKANA            AR   NON TSTM WINDS
04/25/97   MILLER                         TRESS DOWN ACROSS HWY 71
                                          NEAR KIBLAH

0955 PM    2 S TEXARKANA             AR   NON TSTM WINDS
04/25/97   MILLER                         TRESS DOWN ACROSS HWY 237

IV

Local storm report, Apr 25, 10:21 PM CDT, 3 hours 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OFFICE SHREVEPORT LA
1015 PM CDT FRI APR 25 1997

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

0930 PM    SHREVEPORT                LA   NON TSTM WINDS
04/25/97   CADDO                          NUMEROUS TREES DOWN ACROSS
                                          THE CITY...SOME ON HOUSES

0950 PM    25 S TEXARKANA            AR   NON TSTM WINDS
04/25/97   MILLER                         TRESS DOWN ACROSS HWY 71
                                          NEAR KIBLAH

0955 PM    2 S TEXARKANA             AR   NON TSTM WINDS
04/25/97   MILLER                         TRESS DOWN ACROSS HWY 237

IV

Special weather statement, Apr 25, 10:26 PM CDT, 3 hours 13 minutes before

ARZ060-061-070>073-LAZ001>006-010>014-017>022-260430-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1026 PM CDT FRI APR 25 1997

...STRONG AND GUSTY WINDS CONTINUING EXTREME EAST TEXAS...
SOUTHWEST ARKANSAS...AND NORTHERN LOUISIANA BEHIND A LARGE AREA OF
RAIN AND THUNDERSTORMS THAT COVERED MUCH OF THE AREA...

AT 1030 PM CDT SURFACE AND COOPERATIVE OBSERVER REPORTS HAVE
CONFIRMED THAT EAST TO NORTHEAST WINDS OF 40 TO OVER 55 MPH
HAVE OCCURRED OVER PARTS OF EAST TEXAS...SOUTHWEST ARKANSAS AND
NORTHERN LOUISIANA. WINDS HAVE CAUSED SCATTERED TREE AND POWER LINE
DAMAGE AS WELL AS SOME DAMAGE TO BUILDING ROOFS. THE TREES WERE
DOWNED DUE TO THE SPEED OF THE WINDS AND THE WET SOILS FROM PREVIOUS
RAINS WITH AMOUNTS OF UP TO 2 INCHES.

LOW PRESSURE WAS DEVELOPING IN EAST TEXAS AND WESTERN
LOUISIANA...THIS FEATURE WAS CAUSING AN END TO RAINFALL OVER THE FOUR
STATES REGION FROM WEST TO EAST...AS WELL AS STRONG AND GUSTY WINDS
NOT ASSOCIATED WITH THUNDERSTORMS.

THE STRONG WINDS WILL CAUSE SCATTERED TREE AND POWER LINE DAMAGE
DUE TO THE FACT THAT THE SOILS HAVE RECEIVED RECENT HEAVY RAINS.
PERSONS OVER THE FOUR STATES REGION SHOULD SECURE LOOSE ITEMS
SUCH AS LAWN FURNITURE...TRASH CANS...AND OTHER ITEMS THAT MAY
BE BLOWN AROUND.

18

Special weather statement, Apr 25, 10:31 PM CDT, 3 hours 8 minutes before

ARZ060-061-070>073-LAZ001>006-010>014-017>022-260430-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1026 PM CDT FRI APR 25 1997

...STRONG AND GUSTY WINDS CONTINUING EXTREME EAST TEXAS...
SOUTHWEST ARKANSAS...AND NORTHERN LOUISIANA BEHIND A LARGE AREA OF
RAIN AND THUNDERSTORMS THAT COVERED MUCH OF THE AREA...

AT 1030 PM CDT SURFACE AND COOPERATIVE OBSERVER REPORTS HAVE
CONFIRMED THAT EAST TO NORTHEAST WINDS OF 40 TO OVER 55 MPH
HAVE OCCURRED OVER PARTS OF EAST TEXAS...SOUTHWEST ARKANSAS AND
NORTHERN LOUISIANA. WINDS HAVE CAUSED SCATTERED TREE AND POWER LINE
DAMAGE AS WELL AS SOME DAMAGE TO BUILDING ROOFS. THE TREES WERE
DOWNED DUE TO THE SPEED OF THE WINDS AND THE WET SOILS FROM PREVIOUS
RAINS WITH AMOUNTS OF UP TO 2 INCHES.

LOW PRESSURE WAS DEVELOPING IN EAST TEXAS AND WESTERN
LOUISIANA...THIS FEATURE WAS CAUSING AN END TO RAINFALL OVER THE FOUR
STATES REGION FROM WEST TO EAST...AS WELL AS STRONG AND GUSTY WINDS
NOT ASSOCIATED WITH THUNDERSTORMS.

THE STRONG WINDS WILL CAUSE SCATTERED TREE AND POWER LINE DAMAGE
DUE TO THE FACT THAT THE SOILS HAVE RECEIVED RECENT HEAVY RAINS.
PERSONS OVER THE FOUR STATES REGION SHOULD SECURE LOOSE ITEMS
SUCH AS LAWN FURNITURE...TRASH CANS...AND OTHER ITEMS THAT MAY
BE BLOWN AROUND.

18

Special weather statement, Apr 25, 11:45 PM CDT, 1 hour 54 minutes before

ARZ073-LAZ004>006-012>014-018>022-260545-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1145 PM CDT FRI APR 25 1997

...STRONG AND GUSTY WINDS TO MOVE ACROSS NORTHERN LOUISIANA AND
SOUTHERN ARKANSAS BEHIND THE RAIN AND THUNDERSTORMS THAT COVERED MUCH
OF THE AREA...

AT 1145 PM CDT SURFACE AND COOPERATIVE OBSERVER REPORTS CONTINUE
INDICATING THAT EAST TO NORTHEAST WINDS OF 40 TO OVER 55 MPH
ARE CONTINUING ACROSS PARTS OF NORTHERN LOUISIANA AND SOUTHERN
ARKANSAS. THE WINDS ARE INCREASING AS THE RIAN ENDS ACROSS THE AREA.
THESE WINDS HAVE CAUSED SCATTERED TREE AND POWER LINE
DAMAGE AS WELL AS SOME DAMAGE TO BUILDING ROOFS. THE TREES WERE
DOWNED DUE TO THE SPEED OF THE WINDS AND THE WET SOILS FROM PREVIOUS
RAINS WITH AMOUNTS OF UP TO 2 INCHES.

LOW PRESSURE WAS DEVELOPING IN EAST TEXAS AND WESTERN LOUISIANA. THIS
FEATURE IS BRINGING AN END TO RAINFALL OVER THE FOUR STATES REGION
FROM WEST TO EAST...AS WELL AS STRONG AND GUSTY WINDS NOT ASSOCIATED
WITH THUNDERSTORMS.

THE STRONG WINDS WILL CAUSE SCATTERED TREE AND POWER LINE DAMAGE
DUE TO THE FACT THAT THE SOILS HAVE RECEIVED RECENT HEAVY RAINS.
PERSONS OVER THE FOUR STATES REGION SHOULD SECURE LOOSE ITEMS
SUCH AS LAWN FURNITURE...TRASH CANS...AND OTHER ITEMS THAT MAY
BE BLOWN AROUND.

THE WINDS SHOULD BEGIN TO DIMINISH SHORTLY AFTER 100 AM ACROSS
NORTHERN LOUISIANA AND SOUTHERN ARKANSAS.

18

Special weather statement, Apr 25, 11:48 PM CDT, 1 hour 51 minutes before

ARZ073-LAZ004>006-012>014-018>022-260545-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
1145 PM CDT FRI APR 25 1997

...STRONG AND GUSTY WINDS TO MOVE ACROSS NORTHERN LOUISIANA AND
SOUTHERN ARKANSAS BEHIND THE RAIN AND THUNDERSTORMS THAT COVERED MUCH
OF THE AREA...

AT 1145 PM CDT SURFACE AND COOPERATIVE OBSERVER REPORTS CONTINUE
INDICATING THAT EAST TO NORTHEAST WINDS OF 40 TO OVER 55 MPH
ARE CONTINUING ACROSS PARTS OF NORTHERN LOUISIANA AND SOUTHERN
ARKANSAS. THE WINDS ARE INCREASING AS THE RIAN ENDS ACROSS THE AREA.
THESE WINDS HAVE CAUSED SCATTERED TREE AND POWER LINE
DAMAGE AS WELL AS SOME DAMAGE TO BUILDING ROOFS. THE TREES WERE
DOWNED DUE TO THE SPEED OF THE WINDS AND THE WET SOILS FROM PREVIOUS
RAINS WITH AMOUNTS OF UP TO 2 INCHES.

LOW PRESSURE WAS DEVELOPING IN EAST TEXAS AND WESTERN LOUISIANA. THIS
FEATURE IS BRINGING AN END TO RAINFALL OVER THE FOUR STATES REGION
FROM WEST TO EAST...AS WELL AS STRONG AND GUSTY WINDS NOT ASSOCIATED
WITH THUNDERSTORMS.

THE STRONG WINDS WILL CAUSE SCATTERED TREE AND POWER LINE DAMAGE
DUE TO THE FACT THAT THE SOILS HAVE RECEIVED RECENT HEAVY RAINS.
PERSONS OVER THE FOUR STATES REGION SHOULD SECURE LOOSE ITEMS
SUrCH AS LAWN FURNITURE...TRASH CANS...AND OTHER ITEMS THAT MAY
BE BLOWN AROUND.

THE WINDS SHOULD BEGIN TO DIMINISH SHORTLY AFTER 100 AM ACROSS
NORTHERN LOUISIANA AND SOUTHERN ARKANSAS.

18

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 26, 12:49 AM CDT	Severe Thunderstorm Warning	SHV	Sabine	41 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1997 Every 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.