Alert archive / Texas / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 153, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Sep 10, 1987, 4:42 PM CDT for Blanco County, Gillespie County, Llano County, Texas. It was in force for 63 min.
The area
The counties it named.
The facts
- Issued
- Sep 10, 1987, 4:42 PM CDT (21:42 UTC)
- Expired
- Sep 10, 1987, 5:45 PM CDT
- In force
- 63 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
Counties Blanco County, TX, Gillespie County, TX, Llano 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
Del Rio, TX (KDRT), launched 12:00Z, 9.7 hours before the alert went out and 240 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
- 1659 J/kg
- Mixed-layer CIN
- -156 J/kg
- Mixed-layer LCL
- 1198 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 77 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 10, 4:18 PM CDT, 24 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO TX 415 PM CDT THU SEP 10 1987 A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 9 PM CDT THIS EVENING FOR BANDERA...BEXAR...COMAL...EDWARDS...GUADALUPE...KENDALL...KERR... KINNEY...MEDINA...REAL AND UVALDE COUNTIES. THE METROPOLITAN AREA OF SAN ANTONIO IS INCLUDED IN THE WATCH AREA. IN ADDITION...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 7 PM CDT FOR GONZALES COUNTY. A LINE OF THUNDERSTORMS...SOME POSSIBLY SEVERE WITH STRONG DAMAGING WINDS...LARGE HAIL...FREQUENT LIGHTNING AND LOCALLY HEAVY RAINFALL... EXTENDS FROM ROCKSPRINGS TO JUNCTION TO AUSTIN...WITH MOVEMENT TOWARD THE SOUTHEAST AT 25 MPH. AS THIS LINE MOVES SOUTHEAST THIS AFTERNOON AND EARLY EVENING...PERSONS IN THE HILL COUNTRY...ADJACENT EDWARDS PLATEAU AND SOUTH CENTRAL TEXAS SHOULD BE ON THE ALERT FOR THREATENING WEATHER...LISTEN FOR THE LATEST SEVERE WEATHER BULLETINS...AND BE PREPARED TO? MOVE TO A PLACE OF SAFETY IF SEVERE WEATHER IS SIGHTED OR A WARNING IS ISSUED. ADDITIONAL STATEMENTS WILL BE ISSUED AS CONDITIONS WARRANT...SO PLEASE STAY TUNED TO LOCAL RADIO...TV OR NOAA WEATHER RADIO STATIONS.
Special weather statement, Sep 10, 4:30 PM CDT, 12 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX 430 PM CDT THU SEP 10 1987 ...SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR VAL VERDE COUNTY UNTIL 900 PM CDT... AT 425 PM RADAR INDICATED THUNDERSTORMS AND RAINSHOWERS ALONG HIGHWAY 163 FROM 10 MILES SOUTH OF JUNO AND EXTENDED EAST TO NEAR JUNCTION. ANOTHER AREA OF THUNDERSTORMS WAS IN MEXICO FROM 25 MILES SOUTHWEST TO 75 MILES WEST OF DEL RIO. MOVEMENT OF THE STORMS WAS TO THE EAST AT 30 MILES AN HOUR. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...VERY HEAVY RAIN...AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. BOATERS ON LAKE AMISTAD AND SURROUNDING RIVERS SHOULD BE ON THE WATCH FOR APPROACHING WEATHER AND MOVE QUICKLY TO SHORE AND AWAY FROM THE WATER IF THE WEATHER BECOMES THREATENING. ADDITIONAL STATEMENTS OR WARNINGS WILL BE ISSUED ASF CONDITIONS WARRANT...SO PLEASE STAY TUNED.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 10, 4:28 PM CDT | Severe Thunderstorm Warning | EWX | Edwards, Kerr, Real | 62 min |
| Sep 10, 4:42 PM CDT | Severe Thunderstorm Warning | EWX | Travis | 63 min |
| Sep 10, 4:54 PM CDT | Severe Thunderstorm Warning | EWX | Kendall | 66 min |
| Sep 10, 5:17 PM CDT | Severe Thunderstorm Warning | EWX | Bandera | 58 min |
| Sep 10, 5:40 PM CDT | Severe Thunderstorm Warning | EWX | Bastrop, Caldwell | 65 min |
| Sep 10, 5:42 PM CDT | Severe Thunderstorm Warning | EWX | Comal | 63 min |
| Sep 10, 6:11 PM CDT | Severe Thunderstorm Warning | EWX | Bexar | 64 min |
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.