Alert archive / Texas / Flash Flood Warnings in 1987
Flash Flood Warning 22, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at May 31, 1987, 12:05 PM CDT for Val Verde County, Texas. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- May 31, 1987, 12:05 PM CDT (17:05 UTC)
- Expired
- May 31, 1987, 4:00 PM CDT
- 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, 5.1 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
- 1083 J/kg
- Mixed-layer CIN
- -71 J/kg
- Mixed-layer LCL
- 605 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 113 m²/s²
- 0-3 km storm-relative helicity
- 193 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDRT 311704 FFWDRT TXC465-312100- BULLETIN - EBS ACTIVITATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DEL RIO TX 1205 PM CDT SUN MAY 31 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 400PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY IN SOUTHCENTRAL TEXAS...VAL VERDE. AT 1200 AM CDT HIGHWAY 189 REMAINS CLOSED DUE TO FLOODING FROM NEAR JUNO...NORTH TO THE VAL VERDE AND CROCKETT COUNTY LINE. MOTORISTS TRAVELING IN VAL VERDE COUNTY SHOULD USE EXTREME CAUTION...ESPECIALLY IN THE NORTHEREN PART OF THE COUNTY. HEAVY RAINS IN CROCKETT COUNTY LAST NIGHT WILL LIKELY CAUSE ADDITIONAL FLOODING OF LOW AREAS IN THE NORTHERN PART OF THE COUNTY. 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..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, May 31, 6:37 AM CDT, 5 hours 28 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN TX 630 AM CDT SUN MAY 31 1987 ...THE FLASH FLOOD WATCH CONTINUES FOR TRAVIS AND ALL SURROUNDING COUNTIES IN CENTRAL TEXAS... THUNDERSTORMS AND HEAVY RAINS WERE ONCE AGAIN MOVING INTO THE WESTERN HILL COUNTRY...NORTHWEST AND WEST OF SAN ANTONIO. THEY WERE MOVING TOWARDS THE NORTHEAST AT 10 TO 15 MPH. THE CLOSEST THUNDER- STORM TO AUSTIN AT THIS TIME IS SOME 100 MILES TO THE SOUTHWEST. CONDITIONS REMAIN VERY UNSTABLE AND REFORMATION AND DEVELOPMENT OF ADDITIONAL SHOWERS AND THUNDERSTORMS LATER TODAY WILL ONCE AGAIN INCREASE THE FLASH FLOOD THREAT. NUMEROUS RELEASES HAVE COME OUT OF BOTH THE AUSTIN AND SAN ANTONIO OFFICES CO*NCERNING OUR MINI-MONSOON SEASON. BROADCASTERS PAY PARTICULAR ATTENTION TO THE SAFETY RULES AND REPEAT THESE OFTEN, ESPECIALLY WHEN HEAVY RAINS BEGIN OR MOVE IN.
Special weather statement, May 31, 7:01 AM CDT, 5 hours 4 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX 705 AM CDT SUN MAY 31 1987 ...A FLASH FLOOD WATCH REMAINS IN EFFECT FOR TONIGHT AND SUNDAY FOR VAL VERDE COUNTY TX... AT 700 AM CDT RADAR INDICATED HEAVY THUNDERSTORMS MOVING THROUGH THE CITY OF DEL RIO. HAIL HAS BEEN REPORTED WITH THESE STORMS. THE THUNDERSTORMS ARE MOVING TO THE NORTH AT ABOUT 15 MPH. EVERYONE SHOULD KEEP A WATCHFUL EYE ON THE WEATHER. AVOID DRIVING YOUR CAR DURINJG PERIODS OF HEAVY RAINS. WASH OUTS AND FLOODED ROADWAYS CAN PLUNGE YOU INTO LIFE THREATENING SITUATIONS. YOUR NATIONAL WEATHER SERVICE WILL ISSUE ADDITIONALS STATEMENTS...SO STAY TUNED TO YOUR LOCAL RADIO...TV OR NOAA WEATHER RADIO.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 9:15 AM CDT | Flash Flood Warning | EWX | Kinney | 2 hr |
| May 31, 9:15 AM CDT | Severe Thunderstorm Warning | EWX | Kinney | 60 min |
| May 31, 11:32 AM CDT | Flash Flood Warning | EWX | Kinney | 3 hr |
| May 31, 4:40 PM CDT | Flash Flood Warning | EWX | Hays | 3 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.