Alert archive / Louisiana / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 134, NWS Shreveport, LA

April 22, 1997Bossier Parish, Caddo Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Apr 22, 1997, 6:49 AM CDT for Bossier Parish, Caddo Parish, Louisiana. It was in force for 56 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 22, 1997, 6:49 AM CDT (11:49 UTC)
Expired
Apr 22, 1997, 7:45 AM CDT
In force
56 min
Issued by
NWS Shreveport, LA
Area
Whole counties

Counties Bossier Parish, LA, Caddo Parish, LA

The radar

The Shreveport radar (KSHV), 22 km from the middle of the area, began a volume at 11:51 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
Apr 22, 7:55 AM CDTThunderstorm Wind 100North Shreveport, LAStrong downburst winds (macroburst) toppled numerous trees and powerlines. Numerous homes were also damaged from the toppled trees and over 70,000 homes and business suffered power outages. Also damaged were eleven hangers and five light airplanes at the dow

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 watch it was issued in

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

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

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 11.8 hours before the alert went out and 17 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, Shreveport, LA at 00:00Z on 1997-04-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 310 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Shreveport, LA at 00:00Z on 1997-04-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 square meters per square second.193958Sfc1 km3 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
310 J/kg
Mixed-layer CIN
-45 J/kg
Mixed-layer LCL
1727 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
49 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 22, 4:03 AM CDT, 2 hours 46 minutes earlier.

Area forecast discussion, Apr 22, 4:03 AM CDT, 2 hours 46 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
330 AM CDT TUE APR 22 1997

WILL KEEP BRIEF
FRONTAL SYSTEM OVER NORTHEAST TEXAS ACROSS NORTH LOUISIANA AND INTO
MS CONTINUES TO REMAIN FOCUS FOR SHOWERS AND THUNDERSTORMS. THE FRONTAL
SYSTEM WILL REMAIN OVER THE FA DURING THE DAY AND THEN MOVE SLOWLY
SOUTH BY LATE AFTERNOON AND INTO THE EVENING. ANOTHER IN A SERIES
OF UPPER DISTURBANCES WILL SPREAD SOUTHEAST IN THE NORTHWEST FLOW
ALOFT WITH THE UPPER TROF DEEPENING AND MOVING FRONT TO NEAR
COASTAL SECTIONS DURING THE EVENING.  AFTER THE FRONT MOVES EAST
AND SOUTH OF CWA RAIN CHANCES WILL DECREASE WITH LOWER MEAN RH
VALUES. SHOWERS AND THUNDERSTORMS WILL BE SEVERE TODAY AND POSSIBLY
INTO THE EVENING OVER THE FA. WITH A SURFACE LOW IN THE GULF AND
ANOTHER OVER THE SOUTHEAST ENOUGH MOISTURE WILL WRAP AROUND TO
KEEP CLOUDS INTO THE NORTHEAST AND NORTHERN SECTIONS OF CWA
BUT DRY SLOT WILL ALLOW DECREASE IN CLOUDS ON WEDNESDAY.z

SHV 75/53/79 851  MLU 75/54/78 851                  SIX

In the hours before

Local storm report, Apr 22, 4:25 AM CDT, 2 hours 24 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OFFICE SHREVEPORT LA
425 AM CDT TUE APR 22 1997

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

0345 AM    KEITHVILLE                LA   2.5 INCH HAIL
04/22/97   CADDO

0355 AM    SHREVEPORT                LA   1 INCH HAIL
04/22/97   CADDO                          JEWELLA AND GREENWOOD RD

0350 AM    STONEWALL                 LA   1 INCH HAIL
04/22/97   DE SOTO

0410 AM    STONEWALL                 LA   1.75 INCH HAIL
04/22/97   DE SOTO

ELEVEN
Local storm report, Apr 22, 4:28 AM CDT, 2 hours 21 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OFFICE SHREVEPORT LA
425 AM CDT TUE APR 22 1997

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

0345 AM    KEITHVILLE                LA   2.5 INCH HAIL
04/22/97   CADDO

0355 AM    SHREVEPORT                LA   1 INCH HAIL
04/22/97   CADDO                          JEWELLA AND GREENWOOD RD

0350 AM    STONEWALL                 LA   1 INCH HAIL
04/22/97   DE SOTO

0410 AM    STONEWALL                 LA   1.75 INCH HAIL
04/22/97   DE SOTO

ELEVEN
Local storm report, Apr 22, 5:45 AM CDT, 1 hour 4 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OFFICE SHREVEPORT LA
545 AM CDT TUE APR 22 1997

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

0430 AM    ATLANTA                   TX   1.75 INCH HAIL
04/22/97   CASS

0440 AM    FOREMAN                   AR   1.75 INCH HAIL
04/22/97   LITTLE RIVER

0510 AM    FULTON                    AR   1 INCH HAIL
04/22/97   HEMPSTEAD

0230 AM    WASKOM                    TX   1 INCH HAIL
04/22/97   HARRISON

0530 AM    HOPE                      AR   1.75 INCH HAIL
04/22/97   HEMPSTEAD

ELEVEN
Local storm report, Apr 22, 5:50 AM CDT, 59 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OFFICE SHREVEPORT LA
545 AM CDT TUE APR 22 1997

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

0430 AM    ATLANTA                   TX   1.75 INCH HAIL
04/22/97   CASS

0440 AM    FOREMAN                   AR   1.75 INCH HAIL
04/22/97   LITTLE RIVER

0510 AM    FULTON                    AR   1 INCH HAIL
04/22/97   HEMPSTEAD

0230x AM    WASKOM                    TX   1 INCH HAIL
04/22/97   HARRISON

0530 AM    HOPE                      AR   1.75 INCH HAIL
04/22/97   HEMPSTEAD

ELEVEN
Local storm report, Apr 22, 6:35 AM CDT, 14 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OFFICE SHREVEPORT LA
635 AM CDT TUE APR 22 1997

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

0600 AM    OIL CITY                  LA   .88 INCH HAIL
04/22/97   CADDO

0600 AM    4 N OIL CITY              LA   1 INCH HAIL
04/22/97   CADDO

0540 AM    BENTON                    LA   .75 INCH HAIL
04/22/97   BOSSIER

0625 AM    BENTON                    LA   1 INCH HAIL
04/22/97   CADDO

0627 AM    MT VERNON                 TX   1 INCH HAIL
04/22/97   FRANKLIN

ELEVEN
Local storm report, Apr 22, 6:39 AM CDT, 10 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OFFICE SHREVEPORT LA
635 AM CDT TUE APR 22 1997

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

0600 AM    OIL CITY                  LA   .88 INCH HAIL
04/22/97   CADDO

0600 AM    4 N OIL CITY              LA   1 INCH HAIL
04/22/97   CADDO

0540 AM    BENTON                    LA   .75 INCH HAIL
04/22/97   BOSSIER

0625 AM    BENTON                    LA   1 INCH HAIL
04/22/97   CADDO

0627 AM    MT VERNON                 TX   1 INCH HAIL
04/22/97   FRANKLIN

ELEVEN

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 21, 9:08 PM CDTSevere Thunderstorm WarningSHVBowie, Red River67 min
Apr 21, 10:14 PM CDTSevere Thunderstorm WarningSHVBowie61 min
Apr 21, 11:40 PM CDTSevere Thunderstorm WarningSHVMarion65 min
Apr 21, 11:59 PM CDTSevere Thunderstorm WarningSHVWood61 min
Apr 22, 12:24 AM CDTTornado WarningSHVWood36 min
Apr 22, 12:31 AM CDTSevere Thunderstorm WarningSHVUpshur59 min
Apr 22, 12:56 AM CDTSevere Thunderstorm WarningSHVHarrison64 min
Apr 22, 1:00 AM CDTSevere Thunderstorm WarningSHVGregg, Smith60 min
Apr 22, 1:58 AM CDTSevere Thunderstorm WarningSHVGregg62 min
Apr 22, 2:12 AM CDTSevere Thunderstorm WarningSHVHarrison63 min
Apr 22, 3:05 AM CDTSevere Thunderstorm WarningSHVCass55 min
Apr 22, 4:09 AM CDTSevere Thunderstorm WarningSHVCass66 min
Apr 22, 5:16 AM CDTSevere Thunderstorm WarningSHVMarion44 min
Apr 22, 5:51 AM CDTSevere Thunderstorm WarningSHVWood69 min
Apr 22, 6:03 AM CDTSevere Thunderstorm WarningSHVMarion57 min
Apr 22, 6:15 AM CDTSevere Thunderstorm WarningSHVCamp, Morris, Titus, Upshur60 min
Apr 22, 6:15 AM CDTSevere Thunderstorm WarningSHVFranklin60 min
Apr 22, 6:57 AM CDTSevere Thunderstorm WarningSHVBowie, Cass, Marion63 min
Apr 22, 6:57 AM CDTSevere Thunderstorm WarningSHVHarrison63 min
Apr 22, 2:56 AM CDTSevere Thunderstorm WarningSHVBossier49 min
Apr 22, 3:33 AM CDTSevere Thunderstorm WarningSHVCaddo, De Soto57 min
Apr 22, 4:07 AM CDTSevere Thunderstorm WarningSHVBossier68 min
Apr 22, 5:31 AM CDTSevere Thunderstorm WarningSHVWebster59 min
Apr 22, 5:41 AM CDTSevere Thunderstorm WarningSHVCaddo64 min
Apr 22, 5:58 AM CDTSevere Thunderstorm WarningSHVBossier62 min
Apr 22, 6:43 AM CDTFlash Flood WarningSHVBossier, Caddo3 hr
Apr 22, 7:13 AM CDTSevere Thunderstorm WarningSHVWebster62 min
Apr 22, 7:29 AM CDTSevere Thunderstorm WarningSHVClaiborne61 min
Apr 22, 7:35 AM CDTSevere Thunderstorm WarningSHVBossier, Caddo55 min
Apr 22, 8:01 AM CDTTornado WarningSHVClaiborne, Lincoln44 min
Apr 22, 8:12 AM CDTSevere Thunderstorm WarningSHVDe Soto33 min
Apr 22, 8:15 AM CDTSevere Thunderstorm WarningSHVBienville, Webster45 min
Apr 22, 8:15 AM CDTSevere Thunderstorm WarningSHVRed River45 min
Apr 22, 8:44 AM CDTTornado WarningSHVLincoln31 min
Apr 22, 8:47 AM CDTSevere Thunderstorm WarningSHVClaiborne43 min
Apr 22, 8:58 AM CDTSevere Thunderstorm WarningSHVBienville, Jackson, Lincoln62 min
Apr 22, 8:58 AM CDTSevere Thunderstorm WarningSHVUnion62 min
Apr 22, 9:00 AM CDTSevere Thunderstorm WarningSHVNatchitoches, Winn60 min
Apr 22, 9:17 AM CDTSevere Thunderstorm WarningSHVOuachita58 min
Apr 22, 9:30 AM CDTSevere Thunderstorm WarningSHVCaldwell60 min
Apr 22, 3:24 AM CDTSevere Thunderstorm WarningSHVSevier66 min
Apr 22, 4:34 AM CDTSevere Thunderstorm WarningSHVLittle River56 min
Apr 22, 5:03 AM CDTSevere Thunderstorm WarningSHVHempstead57 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; radar from the NEXRAD Level II archive.