Alert archive / Texas / Flash Flood Warnings in 1992
Flash Flood Warning 56, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at May 20, 1992, 3:35 PM CDT for Bexar County, Kendall County, Texas. It was in force for 115 min.
The area
The counties it named.
The facts
- Issued
- May 20, 1992, 3:35 PM CDT (20:35 UTC)
- Expired
- May 20, 1992, 5:30 PM CDT
- In force
- 115 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
Counties Bexar County, TX, Kendall County, TX
The nearest sounding before it
Del Rio, TX (KDRT), launched 12:00Z, 8.6 hours before the alert went out and 218 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
- 357 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 623 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 33 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 KSAT 202037 FFWSAT TXC029-259-202230- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SAN ANTONIO TX 335 PM CDT WED MAY 20 1992 THE NATIONAL WEATHER SERVICE IN SAN ANTONIO HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 530 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES... IN SOUTH TEXAS ...BEXAR COUNTY...KENDALL COUNTY THUNDERSTORMS PRODUCING VERY HEAVY RAINS CONTINUE TO MOVE NORTHWARD ACROSS BEXAR COUNTY AND INTO KENDALL COUNTY THIS AFTERNOON. IN THE SAN ANTONIO METROPOLITAN AREA...SEVERAL STREETS ARE CLOSED DUE TO HIGH WATER INCLUDING...AUSTIN HIWAY AT N. NEW BRAUNFELS...MOST OF JONES MALTZBERGER...AND WEST AVENUE AT LOOP 410. OVER HALF AN INCH OF RAIN FELL IN JUST 20 MINUTES AT THE NATIONAL WEATHER SERVICE OFFICE IN SAN ANTONIO...AND OTHER AREAS LIKELY RECEIVED HEAVIER AMOUNTS. AVOID ALREADY FLOODED AREAS. TRAVELERS SHOULD NOT ATTEMPT TO CROSS FLOODED ROADS. IF YOUR VEHICLE STALLS...LEAVE IT AND MOVE IMMEDIATELY TO HIGHER GROUND. A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...OR LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSoS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT TO ESCAPE RISING WATER DURING THREATENING RAINS.
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 20, 11:04 AM CDT, 4 hours 31 minutes before
TXZ035-038>040-201700- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO TX 1100 AM CDT WED MAY 20 1992 ...SHOWERS AND THUNDERSTORMS MOVING ACROSS BEXAR COUNTY... AT 1100 AM...SCATTERED SHOWERS AND THUNDERSTORMS...SOME PRODUCING BRIEF HEAVY RAIN WERE MOVING ACROSS BEXAR COUNTY AND PARTS OF SOUTH CENTRAL TEXAS AND INTO THE COASTAL BEND AREA. THE THUNDERSTORMS WITH THE HEAVIEST RAINS WERE LOCATED OVER NORTHWEST AND WEST PORTIONS OF THE SAN ANTONIO METROPOLITAN AREA AND NEAR STOCKDALE. THE LARGE AREA OF SHOWERS AND STORMS WAS FROM COMFORT TO NEAR AUSTIN...THEN EXTENDING SOUTHEAST TO THE MIDDLE TEXAS COAST. MOVEMENT WAS TOWARD THE NORTH AND NORTHWEST AT 10 TO 15 MPH. ABUNDANT MOISTURE IN THE ATMOSPHERE WILL PRODUCE BRIEF HEAVY RAINFALL AND FREQUENT LIGHTNING AS THE MAIN THREATS FROM THESE THUNDERSTORMS. THE RAINS ARE MOVING ACROSS ALREADY RAIN-SOAKED AREAS OF SOUTH CENTRAL TEXAS...RAISING THE POTENTIAL FOR LOCALIZED FLOODING OF LOW-LYING AREAS...STREETS...AND ESPECIALLY LOW-WATER CROSSINGS. THE NATIONAL WEATHER SERVICE WILL KEEP YOU UPDATED ON DEVELOPING WEATHER CONDITIONS...SO STAY TUNED TO YOUR NOAA WEATHER RADIO.
Special weather statement, May 20, 2:42 PM CDT, 53 minutes before
TXZ035-038>040-202200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO TX 235 PM CDT WED MAY 20 1992 ...SHOWERS AND THUNDERSTORMS CONTINUE ACROSS SOUTH CENTRAL TEXAS.. TWO SEPARATE AREAS OF SHOWERS AND THUNDERSTORMS CONTINUED OVER SOUTH TEXAS THIS AFTERNOON. THE FIRST WAS OVER THE EDWARD PLATEAU FROM MAVERICK COUNTY NORTHWARD THOUGH VAL VERDE AND EDWARDS COUNTIES. AT DEL RIO THE RAINFALL WAS ONLY .18 OF AN INCH BUT HIGHER TOTALS OF 3 INCHES OVER COMSTOCK AND OVER 2 INCH IN THE NORTHWEST PART OF THE COUNTY PROMOTED THE ISSUANCE OF A FLASH FLOOD WARNING. THE SECOND AREA COVERED MUCH OF SOUTH CENTRAL TEXAS. SCATTERED SHOWERS AND THUNDERSTORMS STRETCHED FROM THE COASTAL BEND INLAND THROUGH SAN ANTONIO AND GONZALES NORTHWARD TO FREDERICKSBURG AND AUSTIN AND BEYOND. THE STRONGEST THUNDERSTORMS AT 220 PM WERE LOCATED OVER SOUTH BEXAR COUNTY AND WILSON COUNTY. THESE THUNDERSTORMS WERE RELEASING RAINS A RATES OF 3 TO 4 INCHES AN HOUR OVER THE ALREADY FLOODED SAN ANTONIO AND GUADALUPE RIVERS. THE MOIST TROPICAL AIR MASS OVER TEXAS ALONG WITH DAYTIME HEATING HAS TRIGGERED THE DEVELOPMENT OF SHOWERS AND THUNDERSTORMS. CLOUD TO GROUND LIGHTNING...GUSTY WINDS...AND HEAVY DOWNPOURS CAN BE EXPECTED THROUGH THE AFTERNOON INTO THE EARLY EVENING HOURS. A RAPID DECREASE IN SHOWER AND THUNDERSTORM ACTIVITY WILL OCCUR AFTER SUNSET AS THE AIR BEGINS TO COOL. STAY TUNE TO NOAA WEATHER RADIO STATIONS THROUGH SOUTH TE'XAS FOR UP TO THE MINUTE WEATHER INFORMATION.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 8:30 AM CDT | Flash Flood Warning | EWX | Val Verde | 6 hr |
| May 20, 2:00 PM CDT | Flash Flood Warning | EWX | Val Verde | 3 hr |
| May 20, 5:27 PM CDT | Flash Flood Warning | EWX | Bexar | 2 hr |
Nearby
Flash Flood Warnings in Texas, 1992Every flash flood warning in 1992
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.