Alert archive / Texas / Flash Flood Warnings in 1990

Flash Flood Warning 28, NWS Austin/San Antonio, TX

July 16, 1990Atascosa County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jul 16, 1990, 12:12 PM CDT for Atascosa County, Texas. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Jul 16, 1990, 12:12 PM CDT (17:12 UTC)
Expired
Jul 16, 1990, 4:15 PM CDT
In force
4 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Atascosa 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

Corpus Christi, TX (KCRP), launched 12:00Z, 5.2 hours before the alert went out and 174 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.

Skew-T log-pSkew-T log-p diagram, Corpus Christi, TX at 12:00Z on 1990-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2457 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Corpus Christi, TX at 12:00Z on 1990-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
2457 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
650 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
114 m²/s²
Significant tornado parameter
0.7
Supercell composite
4.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KSAT 161731 COR
FFWSAT
TXC013-162115-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING...CORRECTED
NATIONAL WEATHER SERVICE SAN ANTONIO TX
1212 PM CDT MON JUL 16 1990
 
THE NATIONAL WEATHER SERVICE IN SAN ANTONIO HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  415 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTH TEXAS
          ...ATASCOSA
 
FLOODING CONTINUES IN ATASCOSA COUNTY ALONG STREAMS..CREEKS...FLOOD
PLAINS AND LOW AREAS WITH POOR DRAINAGE.
 
RADAR INDICATES THAT VERY HEAVY RAINS HAVE PERSISTED IN ATASCOSA
COUNTY. LOCAL LAW ENFORCEMENT PERSONEL REPORT THAT MANY ROADS ARE
CLOSED IN THE COUNTY DUE TO FLOODED LOW WATER CROSSINGS. HOWEVER AT
THIS TIME THE MAIN THOROUGHFARES..IH37 AND HWY 16..REMAIN OPEN. MANY
CARS ARE REPORTED STALLED ON FLOODED HIGHWAYS AND STREETS.
 
CURRENT INDICATIONS ARE THAT HEAVY RAIN WILL CONTINUE FOR THE NEXT
HOUR OF TWO.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR HAS BEEN
REPORTED.
 
REMEMBER...DEATHS DURING FLASH FLOODING ARE FREQUENTLY RELATED TO
MOTORISTS DRIVING INTO FLOODED LOW WATER CROSSINGS OR FROM CHILDREN
PLAYING NEAR FLOODED STREAMS OR DRAINAGE AREAS. PARENTS DO NOT
LET YOUR CHILDREN SWIM ON FLOTATION DEVICES; IN FLOOD WATERS.

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 15, 8:15 PM CDTSevere Thunderstorm WarningEWXLa Salle45 min
Jul 15, 9:20 PM CDTFlash Flood WarningEWXAtascosa, Bexar115 min
Jul 15, 9:35 PM CDTSevere Thunderstorm WarningEWXWebb55 min
Jul 15, 10:30 PM CDTSevere Thunderstorm WarningEWXWebb60 min
Jul 15, 11:59 PM CDTSevere Thunderstorm WarningEWXDimmit61 min
Jul 16, 2:03 AM CDTFlash Flood WarningEWXAtascosa, Bexar, Medina, Uvalde3 hr
Jul 16, 4:50 AM CDTFlash Flood WarningEWXAtascosa, Bexar, Medina4 hr
Jul 16, 8:42 AM CDTFlash Flood WarningEWXDimmit3 hr
Jul 16, 9:09 AM CDTFlash Flood WarningEWXAtascosa, Bexar3 hr
Jul 16, 11:30 AM CDTFlash Flood WarningEWXZavala3 hr
Jul 16, 11:44 AM CDTFlash Flood WarningEWXDimmit3 hr
Jul 16, 4:17 PM CDTFlash Flood WarningEWXAtascosa, Bexar, Wilson3 hr

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.