Alert archive / Texas / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 64, NWS Austin/San Antonio, TX

May 17, 1986Lampasas County, Mills County, San Saba County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 17, 1986, 9:29 AM CDT for Lampasas County, Mills County, San Saba County, Texas. It was in force for 61 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
May 17, 1986, 9:29 AM CDT (14:29 UTC)
Expired
May 17, 1986, 10:30 AM CDT
In force
61 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

Counties Lampasas County, TX, Mills County, TX, 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.

What was reported inside it

TimeReportWhereRemark
May 17, 10:00 AM CDTHail 1San Saba, TX

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Stephenville/Cla, TX (KSEP), launched 12:00Z, 2.5 hours before the alert went out and 113 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 1986-05-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2509 joules per kilogram.LCLEL10008507005003002001001 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 1986-05-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 73 square meters per square second.19395878Sfc1 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
2509 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
611 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
73 m²/s²
0-3 km storm-relative helicity
116 m²/s²
Significant tornado parameter
1.5
Supercell composite
10.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KAUS 171429
SVRAUS
TXC281-333-441-171530-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN TX
929 AM CDT SAT MAY 17 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 1030 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES OF

TEXAS...WESTERN LAMPASAS...MILLS AND SAN SABA

AT 925 AM CDT A SEVERE THUNDERSTORM WAS LOCATED JUST WEST OF SAN
SABA MOVING RAPIDLY EASTWARDT.  THIS STORM HAS HAD A HISTORY OF
PRODUCING LARGE HAIL AND DAMAGING WINDS.  IT WAS MOVING TOWARDS
THE EAST AT NEAR 30 MPH.

IF THREATENING WEATHER APPROACHES..YOU SHOULD GO TO A SAFE PLACE
IMMEDIATELY.

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, May 17, 6:08 AM CDT, 3 hours 21 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO TX
600 AM CDT SAT MAY 17 1986

...STRONG COLD FRONT TO MOVE THROUGH TEXAS HILL COUNTRY AND ADJOING
   AREAS TODAY AND TONIGHT...

A STRONG COLD FRONT WILL MOVE THROUGH SOUTH TEXAS TODAY AND TONIGHT
CAUSING SEVERE THUNDERSTORMS AND COOLER WEATHER.  THE FRONT..NOW
LOCATED FROM SOUTH OF MIDLAND TO ABILENE TO NEAR DALLS IS MOVING
SOUTH NEAR 20 MPH AND SHOULD ENTER THE TEXAS HILL COUNTRY THIS
AFTERNOON AND MOVE TO NEAR THE COAST BY SUNDAY MORNING.  THE FRONT
IS EXPECTED TO MOVE THROUGH THE SAN ANTONIO AREA THIS EVENING.

SCATTERED TO NUMEROUS THUNDERSTORMS ARE FORMING ALONG AND JUST SOUTH
OF THE COLD FRONT AND WILL ALSO MOVE SOUTH.  THE ATMOSPHERE IS VERY
UNSTABLE AND SOME OF THE THUNDERSTORMS WILL LIKELY BECOME SEVERE.

ANYONE PLANNING OUTDOOR ACTIVITIES TODAY OR TONIGHT SHOULD BE ALERT FOR
THIS DEVELOPING WEATHER SITUATION.  BOATERS SHOULD BE ALERT FOR FAST
MOVING THUNDERSTORMS WHICH MIGHT CATCH THEM IN THE OPEN WATER.
WINDS WITH THE THUNDERSTORMS WILL LIKELY BE QUITE STRONG AND GUSTY
AND CAPABLE OF CAPSIZING SMALL BOATS.  CAMPERS..PICNICKERS AND
SWIMMERS SHOULD ALSO BE ALERT FOR DANGEROUS LIGHTNING WITH THE
THUNDERSTORMS.

WINDS BEHIND THE FRONT WILL BE FROM THE NORTH NEAR 15 MPH TONIGHT
BUT INCREASE TO 15 TO 20 MPH SUNDAY.  WINDS ALONG THE TEXAS COAST
WILL SHIFT TO THE NORTH SUNDAY AND INCREASE TO 20 TO 30 KNOTS.

THE WEATHER WILL BE NOTICEABLY COOLER BEHIND THE FRONT.  TEMPERATURES
AT AMARILLO THIS MORNING WERE IN THE MID 40S WITH NORTH WINDS
GUSTING TO NEAR 45 MPH.   LIGHT SNOW ALSO FELL OVER SOUTHEAST
COLORADO DURING THE NIGHT.

THE COOLER AIR WILL MOVE INTO THE HILL COUNTRY TONIGHT LOWERING
TEMPERATURES INTO THE UPPER 50S.  READINGS SUNDAY OVER THE
TEXAS HILL COUNTRY AND ADJOINING AREAS SHOULD BE IN THE LOWER
70S WITH GUSTY NORTH WINDS.

THE COOL WEATHER WILL CONTINUE INTO THE EARLY PART OF THE WEEK WITH
A WARMING TREND BEGINNING BY MID WEEK.

The office that day

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

IssuedProductOfficeCountiesLasted
May 16, 8:01 PM CDTSevere Thunderstorm WarningEWXDimmit59 min
May 16, 8:20 PM CDTSevere Thunderstorm WarningEWXLa Salle60 min
May 17, 11:24 AM CDTTornado WarningEWXBurnet, Williamson66 min
May 17, 11:39 AM CDTSevere Thunderstorm WarningEWXLlano66 min
May 17, 11:58 AM CDTSevere Thunderstorm WarningEWXBurnet, Lampasas, San Saba62 min
May 17, 11:58 AM CDTSevere Thunderstorm WarningEWXLlano62 min
May 17, 12:21 PM CDTTornado WarningEWXBlanco, Burnet, Llano69 min
May 17, 12:49 PM CDTSevere Thunderstorm WarningEWXComal56 min
May 17, 12:52 PM CDTTornado WarningEWXTravis68 min
May 17, 1:09 PM CDTSevere Thunderstorm WarningEWXWilliamson66 min
May 17, 1:23 PM CDTSevere Thunderstorm WarningEWXHays67 min
May 17, 1:39 PM CDTSevere Thunderstorm WarningEWXBastrop, Lee66 min
May 17, 1:59 PM CDTFlash Flood WarningEWXBlanco, Hays3 hr
May 17, 1:59 PM CDTFlash Flood WarningEWXBurnet3 hr
May 17, 1:59 PM CDTFlash Flood WarningEWXBastrop, Lee, Travis, Williamson3 hr
May 17, 3:20 PM CDTSevere Thunderstorm WarningEWXLavaca55 min
May 17, 3:31 PM CDTTornado WarningEWXGuadalupe59 min
May 17, 3:34 PM CDTTornado WarningEWXLavaca56 min
May 17, 3:40 PM CDTTornado WarningEWXBastrop65 min
May 17, 3:40 PM CDTTornado WarningEWXBastrop32 min
May 17, 3:41 PM CDTSevere Thunderstorm WarningEWXDeWitt64 min
May 17, 3:48 PM CDTTornado WarningEWXGonzales72 min
May 17, 3:53 PM CDTTornado WarningEWXLavaca67 min
May 17, 3:59 PM CDTTornado WarningEWXDeWitt61 min
May 17, 4:07 PM CDTSevere Thunderstorm WarningEWXWebb68 min
May 17, 4:35 PM CDTTornado WarningEWXLavaca55 min
May 17, 4:40 PM CDTTornado WarningEWXVictoria80 min
May 17, 4:44 PM CDTSevere Thunderstorm WarningEWXJackson, Victoria61 min
May 17, 5:17 PM CDTTornado WarningEWXGoliad43 min

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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.