Alert archive / Texas / Flash Flood Warnings in 1987
Flash Flood Warning 1, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Feb 5, 1987, 9:10 AM CST for Val Verde County, Texas. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Feb 5, 1987, 9:10 AM CST (15:10 UTC)
- Expired
- Feb 5, 1987, 1:00 PM CST
- In force
- 4 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Val Verde 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
Del Rio, TX (KDRT), launched 12:00Z, 3.2 hours before the alert went out and 66 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.
- Mixed-layer CAPE
- 146 J/kg
- Mixed-layer CIN
- -722 J/kg
- Mixed-layer LCL
- 903 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 16 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDRT 051511 FFWDRT TXC465-051900- BULLETIN - EBS ACTIVITATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DEL RIO TX 910 AM CST THU FEB 5 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 100 PM FOR PEOPLE IN THE FOLLOWING COUNTY IN SOUTHCENTRAL TEXAS...VAL VERDE. AT 850 AM CST THE DEVILS RIVER WAS CONTINUING TO RISE AND WAS ABOUT TO FLOW OVER THE BRIDGE AT BAKERS CROSSING 12 MILES SOUTH OF JUNO. THE NORMAL FLOW OF THE WATER AT BAKERS CROSSING IS 3.4 FEET AND THE BRIDGE HEIGHT IS 7.4 FEET. MOTORISTS TRAVELING IN NORTHERN VAL VERDE COUNTY AND ON HIGHWAY 163 NORTH OF COMSTOCK SHOULD NOT ATTEMPT TO CROSS LOW WATER CROSSINGS. RANCHERS THAT HAVE LIVESTOCK ALONG THE DEVILS RIVER SHOULD MOVE THEIR LIVESTOCK TO A PLACE OF SAFETY. CAMPERS AND FISHERMEN SHOULD ALSO MOVE TO HIGHER GROUND. A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NO5T ATTEMPT TO CROSS BRIDGES..DIPS..OR LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM..EVEN 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, Feb 5, 4:10 AM CST, 5 hours before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX HHMM PM CST DDD MMM DD 1987 ...THUNDERSTORMS IN THE DEL RIO AREA... AT 410 AM CST THUNDERSTORMS WITH MODERATE RAINSHOWERS AND FREQUENT LIGHTNING WERE OBSERVED IN THE DEL RIO AREA. THESE STORMS WERE MOVING TO THE EAST AT 15 MILES AN HOUR. SMALL HAIL...STRONG GUSTY WINDS...AND FLOODING OF LOW WATER CROSSINGS AND LOW LYING AREAS ARE POSSIBLE WITH THESE THUNDERSTORMS.
Special weather statement, Feb 5, 4:12 AM CST, 4 hours 58 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX 415 AM CST THU FEB 5 1987 ...THUNDERSTORMS IN THE DEL RIO AREA... AT 410 AM CST THUNDERSTORMS WITH MODERATE RAINSHOWERS AND FREQUENT LIGHTNING WERE OBSERVED IN THE DEL RIO AREA. THESE STORMS WERE MOVING TO THE EAST AT 15 MILES AN HOUR. SMALL HAIL...STRONG GUSTY WINDS...AND FLOODING OF LOW WATER CROSSINGS AND LOW LYING AREAS ARE POSSIBLE WITH THESE THUNDERSTORMS.
Special weather statement, Feb 5, 7:03 AM CST, 2 hours 7 minutes before
BULLETIN URBAN FLOOD STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO TX 705 AM CST THU FEB 5 1987 A LINE OF STRONG THUNDERSTORMS WITH BRIEF HEAVY RAINS IS MOVING THROUGH LAREDO AND THE WEBB COUNTY AREA. SOME OF THE HEAVY RAIN MAY PRODUCE BRIEF URBAN STREET FLOODING. THE LINE OF THUNDER STORMS SHOULD MOVE AWAY FROM THE LAREDO AREA BY 8 A.M. ALTHOUGH OTHER THUNDERSTORMS MAY REDEVELOP DURING THE DAY.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 5, 1:19 PM CST | Flash Flood Warning | EWX | Val Verde | 4 hr |
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.