Alert archive / Texas / Flash Flood Warnings in 1990
Flash Flood Warning 35, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Jul 18, 1990, 6:25 PM CDT for Val Verde County, Texas. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Jul 18, 1990, 6:25 PM CDT (23:25 UTC)
- Expired
- Jul 18, 1990, 8:30 PM CDT
- In force
- 2 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, 11.4 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
- 602 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 736 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 111 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 182318 FFWDRT TXC465-190320- BULLETIN - EBS ACTIVITATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DEL RIO TX 625 PM CDT WED JUL 18 1990 THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 1030 PM FOR PEOPLE IN THE FOLLOWING COUNTY IN SOUTHCENTRAL TEXAS...VAL VERDE. RADAR INDICATED LARGE AREAS OF RAIN FALLING OVER THE SOUTHERN HALF OF VAL VERDE COUNTY. THESE SHOWERS ARE FALLING OVER AREAS WHICH ARE ALREADY SATURATED FROM THE PREVIOUS RAIN AND WILL CAUSE ADDITIONAL RUNOFF AND FLOODING NEAR CREEKS...STREAMS AND LOW WATER CROSSINGS. AN EXTENSIVE AREA OF RAIN WITH EMBEDDED SHOWERS AND THUNDERSTORMS EXTENDS SOUTH OF DEL RIO TO NEAR LAREDO. THE NORTHWARD MOVEMENT OF THIS AREA OF RAIN SHOULD CONTINUE TO BRING ADDITIONAL RAINFALL ACROSS THE AREA THROUGH TONIGHT. 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, Jul 18, 5:07 PM CDT, 1 hour 18 minutes before
TXZ035-039-041-190000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO, TX 505 PM CDT SUN JUL 15 1990 ...WIDELY SCATTERED LATE AFTERNOON SUMMER SHOWERS AND THUNDERSTORMS ACROSS SOUTH CENTRAL TEXAS... AT 500 PM SCATTERED SHOWERS AND THUNDERSTORMS WERE IN PROGRESS OVER PARTS OF THE SAN ANTONIO METROPOLITAN AREA AND OVER PARTS OF KENDALL... COMAL...GUADALUPE...WILSON...ATASCOSA...AND MCMULLEN COUNTIES MOVING NORTHWEST AT 15 MILES AN HOUR. ALTHOUGH MODERATE RAIN CAN BE EXPECTED FROM MOST OF THESE SHOWERS AND THUNDERSTORMS IN THE NEXT ONE TO TWO HOURS...BRIEF PERIODS OF HEAVY RAIN CAN BE EXPECTED IN THE STRONGER SHOWERS AND THUNDERSTORMS. MOTORISTS IN AFTER WORK TRAFFIC fWILL RUN THE RISK OF LOWERED VISIBILITES AND SLIPPERY STREETS IN RAIN. IN ADDITION...MOTORISTS SHOULD CAREFULLY APPROACH LOW WATER CROSSINGS...WHERE BRIEF FLOODING MAY OCCUR FROM PERIODS OF MODERATE TO HEAVY RAIN.
Nearby
Flash Flood Warnings in Texas, 1990Every flash flood warning in 1990
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.