Alert archive / Texas / Flash Flood Warnings in 1987
Flash Flood Warning 74, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Jun 11, 1987, 9:43 PM CDT for Uvalde County, Texas. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Jun 11, 1987, 9:43 PM CDT (02:43 UTC)
- Expired
- Jun 12, 1987, 12:45 AM CDT
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Uvalde 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 00:00Z, 2.7 hours before the alert went out and 104 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
- 1550 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 1020 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 9 m²/s²
- Significant tornado parameter
- -0.1
- Supercell composite
- -0.4
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KSAT 120243
FFWSAT
TXC463-120545-
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
943 PM CDT THU JUN 11 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 1245 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTY...
IN SOUTH TEXAS
...NORTHERN UVALDE
RADAR HAS INDICATED HEAVY SHOWERS IN NORTHERN UVALDE COUNTY. THESE
SHOWERS ARE MOVING SLOWLY TO THE EAST. RAINFALL AMOUNTS UP TO THREE
INCHES AN HOUR ARE POSSIBLE. WITH GROUNDS ALREADY SATURATED ANY AND
ALL RAINFALL WILL RUN OFF AND CAUSE CREEKS TO RISE AND LOW WATER
CROSSINGS TO FLOOD.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR HAS BEEN
REPORTED. AVOID LOW WATER CROSSINGS. KEEP CHILDREN AND PETS AWAY FROM
FLOODED STREAMS DRAINAGE AREAS AND LOW WATER CROSSINGS.
YOU SHOULD ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY YOUR
SEVERE WEATHER REPORTS TO THE LOCAL NATIONAL WEATHER SERVICE OFFICE.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, Jun 11, 4:23 PM CDT, 5 hours 20 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX 423 PM CDT THU JUN 11 1987 ...THE FLASH FLOOD WATCH FOR VAL VERDE COUNTY IS NO LONGER IN EFFECT... AT 420 PM CDT RADAR INDICATED RAINSHOWERS AND THUNDERSTORMS 25 MILES SOUTHWEST OF DEL RIO IN OLD MEXICO. ANOTHER AREA OF THUNDERSTORMS WAS NEAR LANGTRY IN WESTERN VAL VERDE COUNTY. MOVEMENT WAS TO THE NORTHEAST AT 10 MILES AN HOUR. BOATERS ON THE RIO GRANDE...PECOS...DEVILS...AND AMISTAD LAKE SHOULD CONINUE TO MONITOR THE WEATHER AND BE PREPARED TO MOVE TO A SAFE HARBOR SHOULD THE WEATHER BECOME THREATENING. SMALL HAIL...HEAVY RAIN...STRONG GUSTY WINDS AND FREQUENT DANGEROUS LIGHTNING ARE LIKELY WITH THESE STORMS. FIVE FEET OF WATER WAS REPORTED IN THE DRY DEVILS RIVER AND 7 FEET OF WATER WAS OVER HIGHWAY 189 IN NORTHERN VAL VERDE COUNTY. HIGHWAYS 163 AND 189 ARE CLOSED. SOME LOW AREAS OF ROADWAYS MAY BECOME FLOODED. MOTORISTS ARE URGED TO USE CAUTION AND NOT ATTEMPT TO CROSS FLOODED LOW WATER CROSSINGS. CAMPERS AND CANOEISTS ALONG THE DEVILS RIVER SHOULD USE EXTREME CAUTION...KEEP A LOOKOUT AND BE READY TO MOVE TO HIGHER GROUND. YOUR NATIONAL WEATHER SERVICE WILL ISSUE ADDITIONAL STATEMENTS...SO STAY TUNED TO YOUR LOCAL RADIO...TV...OR NOAA WEATHER RADIO.
Special weather statement, Jun 11, 8:06 PM CDT, 1 hour 37 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX 810 PM CDT THU JUN 11 1987 AT 805 PM CDT RADAR INDICATED THUNDERSTORMS 50 MILES NORTHWEST OF DEL RIO. PANDALE CROSSING...60 MILES NORTHWEST OF DEL RIO...REPORTED THUNDERSTORMS WITH HEAVY RAIN...STRONG GUSTY WINDS AND FREQUENT DANGEROUS LIGHTNING DURING THE PAST FIVE MINUTES. THESE STORMS WERE MOVING TO THE EAST NORTHEAST AT 10 MPH...BUT ALSO BUILDING TO THE SOUTHEAST TOWARD DEL RIO. SOME LOW AREAS OF ROADWAYS MAY BECOME FLOODED...HIGHWAYS 163 AND 189 IN NORTHERN VAL VERDE COUNTY ARE ALREADY CLOSED. MOTORISTS ARE URGED TO USE CAUTION AND NOT TO ATTEMPT TO CROSS FLOODED LOW WATER CROSSINGS. CAMPERS AND CANOEISTS ALONG THE PECOS RIVER SHOULD USE EXTREME CAUTION...KEEP A LOOKOUT AND BE READY TO MOVE TO HIGHER GROUND.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 11, 8:11 PM CDT | Flash Flood Warning | EWX | Bandera, Kerr | 4 hr |
| Jun 11, 8:18 PM CDT | Flash Flood Warning | EWX | Gillespie | 3 hr |
| Jun 11, 11:06 PM CDT | Flash Flood Warning | EWX | Medina | 4 hr |
| Jun 12, 12:05 AM CDT | Flash Flood Warning | EWX | Frio | 4 hr |
| Jun 12, 1:31 AM CDT | Flash Flood Warning | EWX | Dimmit, La Salle | 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.