Alert archive / Texas / Flash Flood Warnings in 1997

Flash Flood Warning 54, NWS Shreveport, LA

May 27, 1997Harrison County, Texas

NWS Shreveport, LA issued this flash flood warning at May 27, 1997, 4:08 PM CDT for Harrison County, Texas. 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: May 27, 1997, 4:08 PM CDT (21:08 UTC)
Expired: May 27, 1997, 7:15 PM CDT
In force: 3 hr
Issued by: NWS Shreveport, LA
Area: Whole counties

County Harrison County, TX

The radar

The Shreveport radar (KSHV), 51 km from the middle of the area, began a volume at 21:12 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 12:00Z, 9.1 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: 1358 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 824 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 137 m²/s²
0-3 km storm-relative helicity: 212 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSHV 272108
FFWSHV
TXC203-280015-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
408 PM CDT TUE MAY 27 1997
 
THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  715 PM CDT
FOR THE FOLLOWING AREA...
 
IN NORTHEAST TEXAS
 
   ...HARRISON COUNTY
 
AT 405 PM CDT DOPPLER RADAR SHOWED RAINFALL AMOUNTS OF 3 TO 4
INCHES OVER THE SOUTHERN SECTIONS OF HARRISON COUNTY ALONG
INTERSTATE 20 SOUTH OF MARSHALL TEXAS. THUNDERSTORMS WERE
MOVING TO THE EAST AT 10 MPH AND PRODUCING RAINFALL AMOUNTS OF
1 TO NEAR 2 INCHES PER HOUR. THIS WILL CAUSE FLOODING IN A SHORT
PORIOD OF TIME.
 
 
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED
IMMEDIATELY.

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 May 27, 3:41 PM CDT, 27 minutes earlier.

Area forecast discussion, May 27, 3:41 PM CDT, 27 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SHREVEPORT LA
330 PM CDT TUE MAY 27 1997

LATEST SFC ANALYSIS SHOWS COLD FRONT FROM DRT TO ACT TO JUST NORTH OF
TXK AND LIT.  SATELLITE ANALYSIS SHOWING EXPLOSIVE DEVELOPMENT NEAR ACT
AND NE TX WHERE SVR WARNINGS ARE RUNNING CURRENTLY.  AS STATED IN THE
MORNING PACKAGE...SOUNDINGS ARE RIPE FOR EXPOSIVE DEVELOPMENT ACROSS
THE AREA...WITH UNMODIFIED CAPES IN THE 2000 TO 4000...LI IN THE -7 TO
-12...PW OF 1 TO 2 INCHES...ETC.  THE LIT SOUNDING HAS A BIT MORE
FAVORABLE WIND PROFILE FOR TORNADOES.  TEMPS ARE ONLY IN THE UPPER 70S
TO LOWER 80S ACROSS NE TX...NW LA...AND SW AR...WITH UPPER 80S TO NEAR
90 SE TX AND S LA.

QUICK LOOK AT ETA/NGM COMPARISON RUN SHOWS FRONT ONLY SLOWLY SAGGING
SOUTH ACROSS FA.  H5 TROF SHIFTS SLOWLY EAST WITH VORT MAXES ROTATING
AROUND THE BASE THE NEXT 48 HRS OR SO.  H7 UPWARD VV ARE GREATEST
NGM WITH VALUES OF 6...VALUES OF 3 FOR 12Z WED.  WITH SOME DIFLUENCE
ARLOFT H5 AND HIGHER...THE CURRENT TREND OF EXPLOSIVE DEVELOPMENT
THROUGHOUT TONIGHT WILL CONTINUE.

QUICK LOOK AT NGM MOS...WILL USE PERSISTANCE.

SHV 68/85/65/88 6412   MLU 70/85/66/88 5422

10

In the hours before

Local storm report, May 27, 3:00 PM CDT, 1 hour 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OFFICE SHREVEPORT LA
300 PM CDT THU MAY 27 1997

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

0255 PM    ATLANTA                   TX   .5 INCH HAIL
05/27/97   CASS                           REPORTED BY FIRE
                                          DEPARTMENT.

Local storm report, May 27, 3:00 PM CDT, 1 hour 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OFFICE SHREVEPORT LA
300 PM CDT THU MAY 27 1997

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

0255 PM    ATLANTA                   TX   .5 INCH HAIL
05/27/97   CASS                           REPORTED BY FIRE
                                          DEPARTMENT.

Local storm report, May 27, 3:04 PM CDT, 1 hour 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OFFICE SHREVEPORT LA
300 PM CDT THU MAY 27 1997

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

0255 PM    ATLANTA                   TX   .5 INCH HAIL
05/27/97   CASS                           REPORTED BY FIRE
                                          DEPARTMENT.

Local storm report, May 27, 3:35 PM CDT, 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OFFICE SHREVEPORT LA
335 PM CDT THU MAY 27 1997

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

0310 PM    DOUGLASSVILLE             TX   .75 INCH HAIL
05/27/97   CASS

VIII.

Local storm report, May 27, 3:54 PM CDT, 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
354 PM CDT TUE MAY 27 1997

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

0350 PM    RAVANA                    AR   1 INCH HAIL
05/27/97   MILLER                         NICKLE TO QUARTER SIZED
                                          HAIL REPORTED.

10

Local storm report, May 27, 3:58 PM CDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SHREVEPORT LA
354 PM CDT TUE MAY 27 1997

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

0350 PM    RAVANA                    AR   1 INCH HAIL
05/27/97   MILLER                         NICKLE TO QUARTER SIZED
                                          HAIL REPORTED.

10

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 12:41 AM CDT	Severe Thunderstorm Warning	SHV	Red River	64 min
May 27, 2:58 AM CDT	Severe Thunderstorm Warning	SHV	Bowie	62 min
May 27, 12:32 PM CDT	Severe Thunderstorm Warning	SHV	Panola	43 min
May 27, 1:16 PM CDT	Severe Thunderstorm Warning	SHV	Harrison	44 min
May 27, 2:15 PM CDT	Severe Thunderstorm Warning	SHV	Rusk	45 min
May 27, 2:43 PM CDT	Severe Thunderstorm Warning	SHV	Harrison	62 min
May 27, 3:02 PM CDT	Severe Thunderstorm Warning	SHV	Cass	28 min
May 27, 3:08 PM CDT	Severe Thunderstorm Warning	SHV	Marion	52 min
May 27, 3:42 PM CDT	Severe Thunderstorm Warning	SHV	Harrison	48 min
May 27, 3:59 PM CDT	Severe Thunderstorm Warning	SHV	Cass	46 min
May 27, 4:37 PM CDT	Severe Thunderstorm Warning	SHV	Harrison	53 min
May 27, 4:46 PM CDT	Severe Thunderstorm Warning	SHV	Panola	59 min
May 27, 5:16 PM CDT	Severe Thunderstorm Warning	SHV	Bowie	59 min
May 27, 6:06 PM CDT	Severe Thunderstorm Warning	SHV	Harrison	54 min
May 27, 6:51 PM CDT	Severe Thunderstorm Warning	SHV	Shelby	54 min

Nearby

Flash Flood Warnings in Texas, 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.