Alert archive / Texas / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 82, NWS Austin/San Antonio, TX

August 19, 1986San Saba County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Aug 19, 1986, 3:47 PM CDT for San Saba County, Texas. It was in force for 58 min.

The area

The counties it named.

The facts

Issued
Aug 19, 1986, 3:47 PM CDT (20:47 UTC)
Expired
Aug 19, 1986, 4:45 PM CDT
In force
58 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County San Saba 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

Stephenville/Cla, TX (KSEP), launched 12:00Z, 8.8 hours before the alert went out and 137 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, Stephenville/Cla, TX at 12:00Z on 1986-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2456 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Stephenville/Cla, TX at 12:00Z on 1986-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 26 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
2456 J/kg
Mixed-layer CIN
-98 J/kg
Mixed-layer LCL
1075 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
26 m²/s²
0-3 km storm-relative helicity
164 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.0

Open this sounding in Storm Lab

The text

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

000 
TTAAOO KAUS 192047
SVRAUS
TXC411-192145-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN TX
347 PM CDT TUE AUG 19 1986
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL  445 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES:
 
IN NORTH CENTRAL TEXAS
          ..SAN SABA

JUST BEFORE 4 PM...AN ISOLATED RAPIDLY INTENSIFING THUNDERSTORM
FORMED ALONG THE COLORADO RIVER..JUST NORTH OF THE CITY OF SAN SABA.
IT WAS DRIFTING WESTWARD AROUND 10 MPH.
 
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH,
DESTRUCTIVE HAIL, DEADLY LIGHTNING AND VERY HEAVY RAIN.  FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

What forecasters said that day

The local office's own words before this severe thunderstorm 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, Aug 19, 12:03 PM CDT, 3 hours 44 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO TX
1205 PM CDT TUE AUG 19 1986

...VERY HOT TEMPERATURES ACROSS SOUTH TEXAS TO CONTINUE...

TEMPERATURES WILL AGAIN REACH 100 DEGREES OR HIGHER OVER MUCH OF THE
INTERIOR OF SOUTH TEXAS THIS AFTERNOON.  NEAR THE COAST READINGS WILL
REACH ONLY INTO THE 90S BUT WITH HIGHER HUMIDITIES CONDITIONS WILL FEEL
JUST AS UNCOMFORTABLE.

THE CAUSE OF THIS VERY HOT WEATHER IS RELATED TO A LARGE WARM CELL OF
HIGH PRESSURE EXTENDING INTO TEXAS FROM NEW MEXICO AND COLORADO.  NO
CHANGE IN THIS HIGH PRESSURE PATTERN IS EXPECTED IN THE NEXT FEW DAYS.

PERSONS WORKING OUT OF DOORS..THOSE LIVING IN UNAIRCONDITIONED SPACES
...THE ELDERLY AND PEOPLE IN POOR HEALTH SHOULD TAKE PRECAUTIONS FOR
THIS PERIOD OF EXTREME HEAT.
Special weather statement, Aug 19, 2:30 PM CDT, 1 hour 17 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO TX
230 PM CDT TUE AUG 19 1986

...VERY HOT TEMPERATURE READINGS ACROSS SOUTH TEXAS THIS AFTERNOON...

TEMPERATURES HAVE RISEN TO NEAR 100 OR HIGHER THIS AFTERNOON OVER
MUCH OF SOUTH TEXAS WITH RELATIVE HUMIDITY VALUES ADDING TO THE
HEAT DISCOMFORT.  THE HEAT INDEX READINGS OVER SOUTH TEXAS HAVE
RISEN TO 105 OR HIGHER OVER MANY SECTIONS AND EVEN ABOVE 110 OVER
PORTIONS OF SOUTHEAST TEXAS.

IT IS VERY IMPORTANT TO TAKE THE HOT TEMPERATURES SERIOUSLY FOR
THE REMAINDER OF TODAY.  WINDS ARE QUITE LIGHT AND MANY BUILDINGS
WITHOUT AIR CONDITIONING WILL LACK VENTILATION.  SOME SAFETY TIPS
TO REMEMBER DURING HIGH HEAT INDEX PERIODS.

1. SLOW DOWN.  STRENUOUS ACTIVITIES SHOULD BE REDUCED OR RESCHEDULED
TO COOLER TIMES OF THE DAY.

2. DRESS IN LIGHTWEIGHT LIGHT-COLORED CLOTHING.  THIS WILL HELP YOU
BODY MAINTAIN NORMAL TEMPERATURES.

3. DRINK PLENTY OF WATER OR OTHER NON-ALCOHOLIC FLUIDS.  YOUR BODY
NEEDS WATER TO KEEP COOL.  DRINK PLENTY OF FLUIDS EVEN IF YOU
DON'T FEEL THIRSTY.  PERSONS WHO HAVE EPILEPSY..HEART..KIDNEY..OR
LIVER DISEASE..ARE ON FLUID RESTRICTIVE DIETS.. OR HAVE A PROBLEM
WITH FLUID RETENTION SHOULD CONSULT A PHYSICIAN BEFORE INCREASING
THEIR CONSUMPTION OF FLUIDS.

4.  DON'T GET TOO MUCH SUN.  SUNBURN MAKES THE JOB OF HEAT
DISSIPATION THAT MUCH MORE DIFFICULT.

SEVERAL MORE HOURS OF TEMPERATURES ABOVE 100 DEGREES TODAY WILL MAKE
UNAIRCONDITIONED HOMES AND BUILDINGS DANGEROUS TO THOSE MOST SUSCEPTIBLE
TO HEAT STRESS..PARTICULARLY THE ELDERLY AND THOSE WHO ARE ILL.  IF
YOU HAVE A FRIEND..RELATIVE..OR NEIGHBOR WHO YOU SUSPECT MAY BE
BE CONFINED TO A HOT UNVENTILATED AREA..IT WOULDT BE WISE TO CHECK WITH
THEM FREQUENTLY..OR BETTER YET MOVE THEM TO A COOLER PLACE.

ALSO..DON'T FORGET YOUR PETS.  THEY NEED PLENTY OF WATER AND A SHADY
PLACE TO STAY.

Nearby

Severe Thunderstorm Warnings in Texas, 1986Every severe thunderstorm warning in 1986

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.