Alert archive / Texas / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 162, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Sep 15, 1987, 6:00 PM CDT for Williamson County, Texas. It was in force for 35 min.
The area
The counties it named.
The facts
- Issued
- Sep 15, 1987, 6:00 PM CDT (23:00 UTC)
- Expired
- Sep 15, 1987, 6:35 PM CDT
- In force
- 35 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Williamson 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, 11.0 hours before the alert went out and 181 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
- 731 J/kg
- Mixed-layer CIN
- -45 J/kg
- Mixed-layer LCL
- 641 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 126 m²/s²
- 0-3 km storm-relative helicity
- 164 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.1
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KAUS 152300
SVRAUS
TXC491-160000-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN TX
600 PM CDT TUE SEP 15 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 700 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY...
IN SOUTH CENTRAL TEXAS
...WILLIAMSON
AT 600 PM CDT AUSTIN WEATHER RADAR INDICATED A SEVERE THUNDERSTORM
LOCATED IN WILLIAMSON COUNTY. WITHIN THE PAST FEW MINUTES THERE HAVE
BEEN REPORTS OF HIGH WINDS IN THE LEANDER AREA.
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.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, Sep 15, 12:49 PM CDT, 5 hours 11 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX 1249 PM CDT TUE SEP 15 1987 AT 1245 PM CDT A LINE OF THUNDERSTORMS AND RAINSHOWERS WERE CONTINUING BETWEEN JUNO AND LOMA ALTA IN NORTHEAST VAL VERDE COUNTY. MOVEMENT OF THE THUNDERSTORMS WAS TO THE NORTHEAST AT 25 MILES AN HOUR. ALTHOUGH THE THUNDERSTORMS WERE MOVING RAPIDLY TO THE NORTHEAST...NEW ACTIVITY CONTINUED TO DEVELOP IN THE SAME LOCATION IN NORTHEAST VAL VERDE COUNTY. MOTORISTS TRAVELING ON HIGHWAYS 277 AND 189 IN NORTHEAST VAL VERDE COUNTY SHOULD REMAIN ALERT FOR REDUCED VISIBILITY AND FLOODED LOW LYING AREAS. STRONG GUSTY WINDS...SMALL HAIL...DANGEROUS LIGHTNING AND BRIEF HEAVY RAIN CAN BE EXPECTED WITH THESE #THUNDERSTORMS. STAY TUNED TO YOUR LOCAL RADIO...TV STATION OR NOAA WEATHER RADIO FOR THE LATEST WEATHER INFORMATION.
Special weather statement, Sep 15, 5:17 PM CDT, 43 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX 517 PM CDT TUE SEP 15 1987 AT 515 PM A AREA OF HEAVY THUNDERSTORMS WAS LOCATED 10 MILES SOUTHWEST OF DEL RIO AND WAS MOVING TO THE NORTHEAST AT ABOUT 10 MILES AN HOUR. SOME AREAS OF DEL RIO MAY EXPERIENCE STRONG GUSTY WINDS...DANGEROUS LIGHTNING AND BRIEF HEAVY RAIN AS THESE THUNDERSTORMS MOVE ACROSS THE AREA. BOATERS AND FISHERMEN ON THE LAKE AMISTAD SHOULD MONITOR THE WEATHER CLOSELY AND MOVE TO SAFE HARBOR BEFORE THE THUNDERSTORMS ARRIVE. STAY TUNED TO YOUR LOCAL RADIO...TV STATION OR NOAA WEATHER RADIO FOR THE LATEST WEATHER INFORMATION.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 15, 5:01 AM CDT | Flash Flood Warning | EWX | Real | 4 hr |
Nearby
Severe Thunderstorm Warnings in Texas, 1987Every severe thunderstorm warning in 1987
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.