Alert archive / Texas / Flash Flood Warnings in 1987

Flash Flood Warning 2, NWS Fort Worth, TX

May 14, 1987Collin County, Denton County, Texas

NWS Fort Worth, TX issued this flash flood warning at May 14, 1987, 5:01 PM CDT for Collin County, Denton County, Texas. It was in force for 119 min.

The area

The counties it named.

The facts

Issued
May 14, 1987, 5:01 PM CDT (22:01 UTC)
Expired
May 14, 1987, 7:00 PM CDT
In force
119 min
Issued by
NWS Fort Worth, TX
Area
Whole counties

Counties Collin County, TX, Denton County, TX

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Stephenville/Cla, TX (KSEP), launched 12:00Z, 10.0 hours before the alert went out and 160 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, Stephenville/Cla, TX at 12:00Z on 1987-05-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Stephenville/Cla, TX at 12:00Z on 1987-05-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -67 square meters per square second.1939Sfc1 km3 km6 km9 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1614 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-67 m²/s²
0-3 km storm-relative helicity
-37 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 KFTW 142201
FFWFTW
TXC085-121-150100-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE FORT WORTH TX
501 PM CDT THU MAY 14 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL  800 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN NORTH CENTRAL TEXAS
          ...SOUTHWESTERN COLLIN...EASTERN DENTON
 
HEAVY RAINFALL HAS OCCURRED OVER SOUTHWEST COLLIN AND EASTERN DENTON
COUNTIES THIS AFTERNOON. LEWISVILLE REPORTS FOUR INCHES OF RAIN THE
PAST TWO  HOURS. SOME FLOODING OF ROADWAYS IS ALREADY IN PROGRESS.
WITH VERY HEAVY THUNDERSTORMS CONTINUING OVER THE SAME
AREAS...ADDITIONAL AND POSSIBLE SERIOUS FLOODING COULD DEVELOP THIS
EVENING.
 
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT.  MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS
THE ROADWAY.  NEVER TRY TO CROSS A FLOWING STREAM...EVEnN A SMALL
ONE...ON FOOT.  TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.

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.

In the hours before

Special weather statement, May 14, 12:19 PM CDT, 4 hours 42 minutes before
NORTH TEXAS SEVERE WEATHER POTENTIAL STATEMENT
NATIONAL WEATHER SERVICE FT WORTH TX
1215 PM CDT THU MAY 14 1987

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS IN NORTH TEXAS THIS
AFTERNOON AND EVENING GENERALLY TO THE SOUTH AND WEST OF A LINE FROM
HASKELL TO STEPHENVILLE TO TEMPLE. IN ADDITION...THUNDERSTORMS
PRODUCING HEAVY RAINS CAN BE EXPECTED IN AN AREA TO THE WEST OF A
LINE FROM WICHITA FALLS TO FT WORTH TO WACO.

THESE THUNDERSTORMS WILL DEVELOP EARLY THIS AFTERNOON AND WILL
INCREASE IN AREA COVERAGE AND INTENSITY WITH AFTERNOON HEATING. SOME
HAIL CAN BE EXPECTED AS WELL AS BRIEF INTENSE WINDS...USUALLY AS THE
STORMS DISSIPATE. IN ADDITION...MOVEMENT OF THESE STORMS WILL BE
SLOW...PRODUCING HEAVY RAINS OVER A SMALL AREA.

THE JET STREAM IS WELL NORTH OF TEXAS AND WITH THE LACK OF ANY OTHER
SIGNIFICANT DYNAMIC SUPPORT...SEVERE THUNDERSTORMS WILL BE FEW AND
CONFINED TO SMALL AREAS. THE MAIN INGREDIENT FOR SEVERE WEATHER COMES
FROM OVERNIGHT THUNDERSTORMS IN SOUTHWEST TEXAS WHICH PRODUCED
OUTFLOW BOUNDARIES. THESE BOUNDARIES WILL BE THE MAIN FOCUS OF THIS
AFTERNOON'S ACTIVITY WHEN DAYTIME HEATING ALONG WITH ABUNDANT
MOISTURE WILL INTERACT WITH THE BOUNDARIES TO PRODUCE ITHUNDERSTORMS.

A SIGNIFICANT STORM SPOTTER EFFORT IS NOT ANTICIPATED TODAY BUT
SPOTTERS ARE REQUESTED TO PLAN FOR A POSSIBLE LIMITED ACTIVATION
SHOULD THUNDERSTORMS BECOME MORE NUMEROUS THAN EXPECTED.
Special weather statement, May 14, 1:44 PM CDT, 3 hours 17 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WACO TX
145 PM CDT THU MAY 14 1987

AT 140 PM CDT A THUNDERSTORM HAD FORMED AND WAS PRODUCING VERY HEAVY
RAIN OVER WESTERN BELL COUNTY OF CENTRAL TEXAS.  THE THUNDERSTORM WAS
10 MILES SOUTH OF KILLEEN AND WAS MOVING NORTHEAST AT 15 MILES AN HOUR.

PERSONS IN WESTERN AND CENTRAL BELL COUNTY SHOULD BE ON THE LOOKOUT
FOR THIS THUNDERSTORM BECAUSE IT IS CAPABLE OF PRODUCING VERY HEAVY
RAIN..SMALL HAIL AND GUSTY WINDS.

STAY TUNED TO NOAA WEATHER RADIO OR TO LOCAL RADIO AND TELEVISION
STATIONS FOR LATER STATEMENTS.
Special weather statement, May 14, 2:12 PM CDT, 2 hours 49 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FT WORTH TX
213 PM CDT THU MAY 14 1987

AT 205 PM CDT...WEATHER SERVICE RADAR OBSERVED SCATTERED THUNDERSTORMS
DEVELOPING THROUGHOUT PARTS OF NORTH CENTRAL AND NORTHEAST TEXAS
INCLUDING THE DALLAS/FORT WORTH METROPLEX AREA.  THESE THUNDERSTORMS
WERE BEING TRIGGERED BY THE AFTERNOON HEATING WHICH LIFTED MOIST...
UNSTABLE AIR OVER THE AREA.

THUNDERSTORMS WERE OBSERVED BETWEEN DALLAS AND ROCKWALL AND BETWEEN
MINERAL WELLS AND BRECKENRIDGE.  THE STRONGEST THUNDERSTORM WAS
LOCATED JUST NORTHEAST OF DALLAS.

SOME OF THE STRONGER THUNDERSTORMS ARE CAPABLE OF PRODUCING STRONG
GUSTY WINDS...DANGEROUS LIGHTNING...BRIEF HEAVY RAIN AND POSSIBLY SMALL
HAIL.
BOATERS ON AREA LAKES SHOULD SEEK SAFE HARBOR AND MOVE ON SHORE.
IF YOU OBSERVE THREATENING WEATHER IN YOUR AREA...TAKE SHELTER INDOORS.

STAY TUNED FOR LATER STATEMENTS OR WARNINGS AS CONDITIONS WARRANT.
Special weather statement, May 14, 4:25 PM CDT, 36 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WACO TX
420 PM CDT THU MAY 14 1987

...THE SEVERE THUNDERSTORM WARNING FOR BELL COUNTY EXPIRED AT 400 PM
CDT...

AT 415 PM CDT RADAR CONTINUED TO SHOW INTENSE THUNDERSTORMS OVER
SOUTHERN BELL COUNTY.  THE THUNDERSTORMS WERE 15 MILES SOUTHWEST OF
TEMPLE.  EVEN THOUGH THE WARNING HAS EXPIRED..THESE THUNDERSTORMS
ARE STILL CAPABLE OF PRODUCING VERY HEAVY RAIN..GUSTY WINDS..SMALL
HAIL AND DANGEROUS LIGHTNING.  THERE HAVE BEEN SEVERAL REPORTS OF
PEA SIZE HAIL FROM THE KILLEEN AND YOUNGSPORT AREAS.

VERY STRONG THUNDERSTORMS WERE ALSO LOCATED OVER SOUTHERN FALLS
COUNTY WEST AND NORTH OF ROSEBUD.  THE FALLS COUNTY SHERIFF
DEPARTMENT REPORTED PEA SIZE HAIL ON U.S. ROUTE 77 BETWEEN ROSEBUD
AND LOTT IN THE LAST 15 MINUTES.

THE THUNDERSTORMS WERE MOVING NORTH NORTHEAST AT 8 MILES AN HOUR.

PERSONS IN BELL AND FALLS COUNTIES SHOULD CONTINUE TO BE ALERT FOR
THESE THUNDERSTORMS.  DUE TO THE S@LOW MOVEMENT AND VERY HEAVY RAIN..
FLASH FLOODING OF LOW LYING AND FLOOD PRONE AREAS IS ALSO POSSIBLE.

STAY TUNED TO NOAA WEATHER RADIO OR TO LOCAL RADIO AND TELEVISION
STATIONS FOR LATER STATEMENTS.

The office that day

Everything else NWS Fort Worth, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 13, 7:42 PM CDTSevere Thunderstorm WarningFWDKnox63 min
May 14, 12:07 AM CDTSevere Thunderstorm WarningFWDEastland53 min
May 14, 5:30 AM CDTFlash Flood WarningFWDEastland, Stephens3 hr
May 14, 1:51 PM CDTSevere Thunderstorm WarningFWDBell54 min
May 14, 2:16 PM CDTSevere Thunderstorm WarningFWDRockwall59 min
May 14, 3:06 PM CDTSevere Thunderstorm WarningFWDBell54 min
May 14, 3:55 PM CDTSevere Thunderstorm WarningFWDCollin, Cooke, Denton65 min
May 14, 4:54 PM CDTSevere Thunderstorm WarningFWDCollin, Denton66 min
May 14, 4:54 PM CDTSevere Thunderstorm WarningFWDCooke66 min
May 14, 5:14 PM CDTSevere Thunderstorm WarningFWDVan Zandt61 min
May 14, 5:28 PM CDTSevere Thunderstorm WarningFWDDallas62 min
May 14, 5:48 PM CDTSevere Thunderstorm WarningFWDTarrant57 min
May 14, 5:57 PM CDTSevere Thunderstorm WarningFWDDallas63 min

Nearby

Flash Flood Warnings in Texas, 1987Every flash flood warning in 1987

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.