Alert archive / Louisiana / Flash Flood Warnings in 1997

Flash Flood Warning 48, NWS Shreveport, LA

April 22, 1997Bossier Parish, Caddo Parish, Louisiana

NWS Shreveport, LA issued this flash flood warning at Apr 22, 1997, 6:43 AM CDT for Bossier Parish, Caddo Parish, Louisiana. It was in force for 3 hr. 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, 6:43 AM CDT (11:43 UTC)
Expired: Apr 22, 1997, 9:45 AM CDT
In force: 3 hr
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 11:46 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.

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 11.7 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-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: 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

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

000 
TTAA00 KSHV 221144
FFWSHV
LAC015-017-221445-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
643 AM CDT TUE APR 22 1997
 
THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  945 AM CDT
FOR THE FOLLOWING AREAS...
 
IN NORTHWEST LOUISIANA
 
   ...NORTHERN BOSSIER PARISH...NORTHERN CADDO PARISH
 
AT 640 AM CDT...RAINFALL ESTIMATES FROM THE DOPPLER RADAR IN SHREVEPORT
INDICATE AROUND 3 INCHES OF RAIN HAS FALLEN IN THE LAST HOUR ACROSS
NORTHERN CADDO PARISH. THUNDERSTORMS CONTINUE TO REDEVELOP AND MOVE
SLOWLY ACROSS NORTHERN CADDO AND BOSSIER PARISHES. WITH THESE
THUNDERSTORMS REDEVELOPING FLASH FLOODING IS LIKELY ACROSS MOST OF THE
NORTHERN PORTIONS OF CADDO AND BOSSIER PARISHES.
 
THE THUNDERSTORMS AND FLOODING THREAT SHOULD END BY LATE THIS MORNING.
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED
IMMEDIATELY.
 
4/18

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at Apr 22, 4:03 AM CDT, 2 hours 40 minutes earlier.

Area forecast discussion, Apr 22, 4:03 AM CDT, 2 hours 40 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 18 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 15 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, 58 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, 53 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, 8 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, 4 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.

Issued	Product	Office	Counties	Lasted
Apr 21, 11:40 PM CDT	Severe Thunderstorm Warning	SHV	Caddo	65 min
Apr 22, 2:12 AM CDT	Severe Thunderstorm Warning	SHV	Caddo	63 min
Apr 22, 2:56 AM CDT	Severe Thunderstorm Warning	SHV	Bossier	49 min
Apr 22, 3:33 AM CDT	Severe Thunderstorm Warning	SHV	Caddo, De Soto	57 min
Apr 22, 4:07 AM CDT	Severe Thunderstorm Warning	SHV	Bossier	68 min
Apr 22, 5:31 AM CDT	Severe Thunderstorm Warning	SHV	Webster	59 min
Apr 22, 5:41 AM CDT	Severe Thunderstorm Warning	SHV	Caddo	64 min
Apr 22, 5:58 AM CDT	Severe Thunderstorm Warning	SHV	Bossier	62 min
Apr 22, 6:49 AM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo	56 min
Apr 22, 7:13 AM CDT	Severe Thunderstorm Warning	SHV	Webster	62 min
Apr 22, 7:29 AM CDT	Severe Thunderstorm Warning	SHV	Claiborne	61 min
Apr 22, 7:35 AM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo	55 min
Apr 22, 8:01 AM CDT	Tornado Warning	SHV	Claiborne, Lincoln	44 min
Apr 22, 8:12 AM CDT	Severe Thunderstorm Warning	SHV	De Soto	33 min
Apr 22, 8:15 AM CDT	Severe Thunderstorm Warning	SHV	Bienville, Webster	45 min
Apr 22, 8:15 AM CDT	Severe Thunderstorm Warning	SHV	Red River	45 min
Apr 22, 8:44 AM CDT	Tornado Warning	SHV	Lincoln	31 min
Apr 22, 8:47 AM CDT	Severe Thunderstorm Warning	SHV	Claiborne	43 min
Apr 22, 8:58 AM CDT	Severe Thunderstorm Warning	SHV	Bienville, Jackson, Lincoln	62 min
Apr 22, 8:58 AM CDT	Severe Thunderstorm Warning	SHV	Union	62 min
Apr 22, 9:00 AM CDT	Severe Thunderstorm Warning	SHV	Natchitoches, Winn	60 min
Apr 22, 9:17 AM CDT	Severe Thunderstorm Warning	SHV	Ouachita	58 min
Apr 22, 9:30 AM CDT	Severe Thunderstorm Warning	SHV	Caldwell	60 min

Nearby

Flash Flood Warnings in Louisiana, 1997 Every flash flood 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; radar from the NEXRAD Level II archive.