Alert archive / Texas / Flash Flood Warnings in 1999

Flash Flood Warning 37, NWS Shreveport, LA

April 4, 1999Harrison County, Texas

NWS Shreveport, LA issued this flash flood warning at Apr 4, 1999, 8:18 PM CDT for Harrison County, Texas. It was in force for 4 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 4, 1999, 8:18 PM CDT (01:18 UTC)
Expired: Apr 5, 1999, 12:15 AM CDT
In force: 4 hr
Issued by: NWS Shreveport, LA
Area: Whole counties

County Harrison County, TX

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 1.3 hours before the alert went out and 59 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: 857 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 883 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 109 m²/s²
0-3 km storm-relative helicity: 240 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 8.6

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 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 4, 2:00 PM CDT, 6 hours 18 minutes earlier.

Area forecast discussion, Apr 4, 2:00 PM CDT, 6 hours 18 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
200 PM CDT SUN APR 4 1999

ALTHOUGH A FEW THUNDERSTORMS HAVE FORMED IN THE UNSTABLE AIR OVER
CENTRAL AND EAST TEXAS THIS AFTERNOON...THESE SHOULD ONLY BE
MARGINALLY SEVERE...WITH LARGE HAIL THE MAIN THREAT THIS EVENING.
EXPECT THE NEXT MAIN EVENT TO BE MONDAY MORNING IN NORTHEAST TEXAS
AND MOVING EAST INTO LOUISIANA AND SOUTHWEST AR BY AFTERNOON. ETA AND
AVN ARE SHOWING ANOTHER COUPLED JET STREAK SCENARIO ON MONDAY...
SIMILAR TO WHAT OCCURRED ON SATURDAY OVER THE CWA.  THUS WILL GO WITH
INCREASING POPS OVER THE AREA TONIGHT AND MONDAY...WITH POPS FALLING
OFF MONDAY NIGHT AND TUESDAY FROM WEST TO EAST.  WOULD LIKE TO
MENTION SEVERE THUNDERSTORMS MAINLY ON MONDAY OVER THE NORTHERN TWO
THIRDS OF THE AREA...SIMILAR TO SPC DAY TWO OUTLOOK. TEMPS AGAIN LOOK
TOO COOL ON THE MINS...BUT NOT TOO BAD ON THE MAXES. PRELIMS
BELOW...

SHV 65/78/59/76 4631    MLU 65/78/58/75 3651
TXK 64/77/54/73 4621    TYR 64/77/57/76 4511
LFK 67/80/58/78 4411

03

In the hours before

Local storm report, Apr 4, 3:50 PM CDT, 4 hours 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
350 PM CDT SUN APR 04 1999

TIME(CST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....PARISH/COUNTY LOCATION....

0320 PM    BULLARD                   TX   .5 INCH HAIL ON COUNTY
04/04/99   CHEROKEE                       ROAD 118 SOUTHEAST OF
                                          BULLARD.  REPORTED BY
                                          STORM SPOTTERS.

0325 PM    WHITEHOUSE                TX   1 INCH HAIL EAST OF
04/04/99   SMITH                          DOWNTOWN WHITEHOUSE.
                                          REPORTED BY STORM SPOTTERS.

0330 PM    BOSSIER CITY              LA   .5 INCH HAIL AT AIRLINE
04/04/99   BOSSIER                        DRIVE AND I-220.  REPORTED
                                          BY OFF-DUTY NWS EMPLOYEE.

21

Local storm report, Apr 4, 3:50 PM CDT, 4 hours 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
350 PM CDT SUN APR 04 1999

TIME(CST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....PARISH/COUNTY LOCATION....

0320 PM    BULLARD                   TX   .5 INCH HAIL ON COUNTY
04/04/99   CHEROKEE                       ROAD 118 SOUTHEAST OF
                                          BULLARD.  REPORTED BY
                                          STORM SPOTTERS.

0325 PM    WHITEHOUSE                TX   1 INCH HAIL EAST OF
04/04/99   SMITH                          DOWNTOWN WHITEHOUSE.
                                          REPORTED BY STORM SPOTTERS.

0330 PM    BOSSIER CITY              LA   .5 INCH HAIL AT AIRLINE
04/04/99   BOSSIER                        DRIVE AND I-220.  REPORTED
                                          BY OFF-DUTY NWS EMPLOYEE.

21

Local storm report, Apr 4, 7:23 PM CDT, 55 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
723 PM CDT SUN APR 04 1999

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

0540 PM    MAYDELLE                  TX   TORNADO
04/04/99   CHEROKEE                       POSSIBLE TORNADO. TREES
                                          DOWN NEAR MAYDELLE.
                                          REPORTED BY SHERIFF
                                          OFFICE.

0545 PM    BENTON                    LA   1 INCH HAIL
04/04/99   BOSSIER

0545 PM    BENTON                    LA   1 INCH HAIL
04/04/99   BOSSIER

0600 PM    PONTA                     TX   TORNADO
04/04/99   CHEROKEE                       POSSIBLE TORNADO REPORTED
                                          BY SHERIFF OFFICE. UNKNOWN
                                          DAMAGE.

0615 PM    COLFAX                    LA   1 INCH HAIL
04/04/99   GRANT

0615 PM    HAUGHTON                  LA   1.75 INCH HAIL
04/04/99   BOSSIER

0630 PM    NEW SUMMERFIELD           TX   TORNADO
04/04/99   CHEROKEE                       BRIEF POSSIBLE TORNADO
                                          TOUCHDOWN REPORTED BY
                                          SHERIFF. UNKNOWN DAMAGE.

0630 PM    HAUGHTON                  LA   1.75 INCH HAIL
04/04/99   BOSSIER                        REPORTED BY SPOTTERS.

0635 PM    HENDERSON                 TX   60 MPH TSTM GUST
04/04/99   RUSK                           REPORTED BY SPOTTERS.

0645 PM    DRY PRONG                 LA   1.5 INCH HAIL
04/04/99   GRANT                          REPORTED BY SHERIFF.

0655 PM    HENDERSON                 TX   FLOODING
04/04/99   RUSK                           WATER DAMAGE AT WATER
                                          TREATMENT PLANT. REPORTED
                                          BY SPOTTERS.

0712 PM    SHREVEPORT                LA   .5 INCH HAIL
04/04/99   CADDO                          AT LSU SHREVEPORT.
                                          REPORTED BY SPOTTERS.

0700 PM    HENDERSON                 TX   70 MPH TSTM GUST
04/04/99   RUSK                           TREES BLOWN DOWN ACROSS
                                          COUNTY. REPORTED BY
                                          SHERIFF.

03

Local storm report, Apr 4, 7:23 PM CDT, 55 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
723 PM CDT SUN APR 04 1999

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

0540 PM    MAYDELLE                  TX   TORNADO
04/04/99   CHEROKEE                       POSSIBLE TORNADO. TREES
                                          DOWN NEAR MAYDELLE.
                                          REPORTED BY SHERIFF
                                          OFFICE.

0545 PM    BENTON                    LA   1 INCH HAIL
04/04/99   BOSSIER

0545 PM    BENTON                    LA   1 INCH HAIL
04/04/99   BOSSIER

0600 PM    PONTA                     TX   TORNADO
04/04/99   CHEROKEE                       POSSIBLE TORNADO REPORTED
                                          BY SHERIFF OFFICE. UNKNOWN
                                          DAMAGE.

0615 PM    COLFAX                    LA   1 INCH HAIL
04/04/99   GRANT

0615 PM    HAUGHTON                  LA   1.75 INCH HAIL
04/04/99   BOSSIER

0630 PM    NEW SUMMERFIELD           TX   TORNADO
04/04/99   CHEROKEE                       BRIEF POSSIBLE TORNADO
                                          TOUCHDOWN REPORTED BY
                                          SHERIFF. UNKNOWN DAMAGE.

0630 PM    HAUGHTON                  LA   1.75 INCH HAIL
04/04/99   BOSSIER                        REPORTED BY SPOTTERS.

0635 PM    HENDERSON                 TX   60 MPH TSTM GUST
04/04/99   RUSK                           REPORTED BY SPOTTERS.

0645 PM    DRY PRONG                 LA   1.5 INCH HAIL
04/04/99   GRANT                          REPORTED BY SHERIFF.

0655 PM    HENDERSON                 TX   FLOODING
04/04/99   RUSK                           WATER DAMAGE AT WATER
                                          TREATMENT PLANT. REPORTED
                                          BY SPOTTERS.

0712 PM    SHREVEPORT                LA   .5 INCH HAIL
04/04/99   CADDO                          AT LSU SHREVEPORT.
                                          REPORTED BY SPOTTERS.

0700 PM    HENDERSON                 TX   70 MPH TSTM GUST
04/04/99   RUSK                           TREES BLOWN DOWN ACROSS
                                          COUNTY. REPORTED BY
                                          SHERIFF.

03

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 4, 7:04 PM CDT	Severe Thunderstorm Warning	SHV	Harrison	66 min
Apr 4, 7:09 PM CDT	Severe Thunderstorm Warning	SHV	Caddo	51 min
Apr 4, 8:17 PM CDT	Severe Thunderstorm Warning	SHV	Jackson	43 min
Apr 4, 8:24 PM CDT	Severe Thunderstorm Warning	SHV	Webster	46 min
Apr 4, 8:27 PM CDT	Flash Flood Warning	SHV	Bossier, Caddo	3 hr
Apr 4, 9:06 PM CDT	Flash Flood Warning	SHV	Webster	4 hr
Apr 4, 9:28 PM CDT	Flash Flood Warning	SHV	De Soto	4 hr
Apr 4, 9:36 PM CDT	Severe Thunderstorm Warning	SHV	Caddo, De Soto	49 min
Apr 5, 12:01 AM CDT	Flash Flood Warning	SHV	Webster	3 hr
Apr 5, 12:08 AM CDT	Severe Thunderstorm Warning	SHV	Webster	62 min
Apr 5, 1:18 AM CDT	Severe Thunderstorm Warning	SHV	Lincoln	32 min

Nearby

Flash Flood Warnings in Texas, 1999 Every flash flood warning in 1999

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.