Alert archive / Texas / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 35, NWS Austin/San Antonio, TX

April 19, 1986Atascosa County, McMullen County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 19, 1986, 10:49 PM CST for Atascosa County, McMullen County, Texas. It was in force for 56 min.

The area

The counties it named.

The facts

Issued: Apr 19, 1986, 10:49 PM CST (04:49 UTC)
Expired: Apr 19, 1986, 11:45 PM CST
In force: 56 min
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties

Counties Atascosa County, TX, McMullen 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

Victoria Regiona, TX (KVCT), launched 00:00Z, 4.8 hours before the alert went out and 163 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 635 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 622 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 78 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 200451
SVRSAT
TXC013-311-200545-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
1049 PM CST SAT APR 19 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 1145 PM CST FOR PEOPLE IN THE FOLLOWING
COUNTIES OF

SOUTH CENTRAL TEXAS...ATASCOSA AND MCMULLEN

AT 1045 PM CST..NATIONAL WEATHER SERVICE RADAR INDICATED POSSIBLE
SEVERE THUNDERSTORMS OVER WESTERN ATASCOSA COUNTY NEAR CHARLOTTE AND
IN SOUTH CENTRAL MCMULLEN COUNTY.  THESE STORMS LIKELY CONTAIN LARGE
AND DAMAGING WINDS.  THEY ARE MOVING TO THE SOUTHEAST AT 20 MILES
AN HOUR.

SEVERE WEATHER SHOULD BE REPORTED AS QUICKLY AS POSSIBLE TO THE NEAREJST
LAW ENFORCEMENT AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE.

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, Apr 19, 4:50 PM CST, 5 hours 59 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO TX
450 PM CST SAT APR 19 1986

      ...THUNDERSTORMS APPROACHING SOUTH CENTRAL TEXAS...

A LINE OF THUNDERSTORMS HAS DEVELOPED RAPIDLY OVER PORTIONS OF THE
TEXAS HILL COUNTRY DURING THE LAST HOUR.  AT 445 PM CST..THIS LINE
EXTENDED FROM JUST NORTHWEST OF KERRVILLE IN KERR COUNTY NORTHWARD TO
NEAR LAMPASAS.  MOVEMENT OF THIS LINE WAS EAST AT 30 MILES AN HOUR.

CONTINUED FURTHER DEVELOPMENT ALONG THE SOUTHERN END OF THIS LINE IS
LIKELY FOR THE NEXT FEW HOURS.  AS A RESULT..THE THREAT OF THESE
THUNDERSTORMS MOVING INTO THE SAN ANTONIO METROPOLITAN AREA LATER THIS
EVENING IS INCREASING.  PERSONS TAKING PART IN THIS EVENINGtS FIESTA
ACTIVITIES MIGHT WANT TO KEEP A CLOSE WATCH ON THE SKIES.

STAY TUNED TO LOCAL RADIO..TELEVISION OR NOAA WEATHER RADIO FOR THE
LATEST WEATHER INFORMATION.

Local storm report, Apr 19, 9:14 PM CST, 1 hour 35 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN TX
913 PM CST SAT 19 APR 1986

TIME CST     REPORT

400 PM       10W LLANO LARGE HAIL STRIPPED PEACH CROP.
415 PM        9N LLANO S.O. REPORTED HAIL UNKNOWN SIZE.
430 PM       NEAR LLANO HAIL SLIGHTLY SMALLER THAN GOLF BALL.
435 PM       TOW..HAIL AND HIGH WINDS..LIGHT DAMAGE.
440 PM       WIND GUST TO 50 MPH AND SMALL HAIL AT BURNET.
501 PM       AT CITY OF BURNET..2 INCH HAIL.
530 PM       PRIDDY..1/2 INCH HAIL.
550 PM       STRONG WIND SHIFT AT LAKE TRAVIS.  OUTFLOW BNDRY.
600 PM       10N GEORGETOWN..5/8 INCH HAIL.
605 PM       PEA SIZE HAIL AT GEORGETOWN.
620 PM       WIND SHIFT AT WSO..PEAK GUST 29 MPH. OUTFLOW BNDRY.
635 PM       SIESTA SHORES..SOUTH SIDE OF LAKE TRAVIS..MARBLE HAIL.
637 PM       LAKEWAY RESORT..LAKE TRAVIS..PEA TO MARBLE SIZE HAIL.
640 PM       AIRCRAFT 737 REPORTED SEVERE TURBULENCE 10NE AUS.
705 PM       ROCKDALE..MILAM CO..PEA SIZE HAIL.
720 PM       SW AUSTIN..WEST LAKE HILLS..SMALL HAIL.
722 PM       1/4 TO 1/2 INCH HAIL OVER CENTRAL CITY AUSTIN.
730 PM       PILOT REPORTED FUNNEL CLOUD..ALOFT..20 MI E AUSTIN.
827 PM       4W ELROY..15 SE OF AUS..1/2 TO 3/4 INCH HAIL.

END/JVD.

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 19, 9:47 PM CST	Severe Thunderstorm Warning	EWX	Lavaca	13 min
Apr 19, 9:51 PM CST	Severe Thunderstorm Warning	EWX	La Salle	54 min
Apr 19, 11:18 PM CST	Severe Thunderstorm Warning	EWX	La Salle	42 min
Apr 20, 1:50 AM CST	Severe Thunderstorm Warning	EWX	Calhoun	70 min

Nearby

Severe Thunderstorm Warnings in Texas, 1986 Every 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.