Alert archive / Texas / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 147, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Jul 1, 1987, 6:37 PM CDT for Comal County, Texas. It was in force for 68 min.
The area
The counties it named.
The facts
- Issued
- Jul 1, 1987, 6:37 PM CDT (23:37 UTC)
- Expired
- Jul 1, 1987, 7:45 PM CDT
- In force
- 68 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Comal 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 12:00Z, 11.6 hours before the alert went out and 171 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
- 1951 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 807 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- -23 m²/s²
- 0-3 km storm-relative helicity
- -6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KSAT 012337
SVRSAT
TXC091-020045-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
637 PM CDT WED JUL 1 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 745 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY...
IN SOUTH TEXAS
...COMAL
RADAR INDICATES A SEVERE THUNDERSTORM IN NORTHERN COMAL COUNTY MOVING
SOUTHWARD ACROSS THE CANYON LAKE AREA. HEAVY RAIN AND HAIL HAVE BEEN
REPORTED IN THE THIS THUNDERSTORM.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...HAIL
3/4 INCH OR MORE IN DIAMETER...FREQUENT LIGHTNING AND VERY HEAVY
RAIN.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, Jul 1, 2:28 PM CDT, 4 hours 9 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN TX 230 PM CDT WED JUL 1 1987 ...STRONG THUNDERSTORMS FORMING NORTHEAST OF AUSTIN... WEATHER RADAR SHOWS STRONG THUNDERSTORMS DEVELOPING NORTHEAST OF AUSTIN FROM HUTTO TO THORNDALE TO ROCKDALE. THE MOST INTENSE THUNDERSTORM IS BETWEEN THRALL AND THORNDALE ALONG THE WILLIAMSON- MILAM COUNTY LINE. LITTLE MOVEMENT IS INDICATED. THESE INDIVIDUAL STORMS COULD PRODUCE LOCALIZED VERY HEAVY RAIN AND POSSIBLE HAIL.
Special weather statement, Jul 1, 5:04 PM CDT, 1 hour 33 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN TX 505 PM CDT WED JUL 1 1987 ...STRONG THUNDERSTORMS MOVING OUT OF THE CAPITAL CITY... WEATHER RADAR CONTINUES TO SHOW INTENSE THUNDERSTORMS IN OUR CENTRAL TEXAS AREA... BUT THEY HAVE MOVED WEST OUT OF THE AUSTIN METROPOLITAN AREA. THE MOST INRENSE THUNDERSTORMS ARE WEST OF A LINE FROM BUDA TO LEANDER. THESE THUNDERSTORMS ARE MOVING INTO HAYS AND BLANCO COUNTIES. THESE INDIVIDU\AL STORMS COULD PRODUCE LOCALIZED VERY HEAVY RAIN AND POSSIBLE PEA TO MARBLE SIZE HAIL. SOME LOW WATER CROSSINGS MAY BE FLOODED FOR ANOTHER OR SO.
Local storm report, Jul 1, 5:34 PM CDT, 1 hour 3 minutes before
LOCAL STORM REPORT NATIONAL WEATHER SERVICE AUSTIN TX 530 PM CDT WED JUL 1 1987 SEVERE THUNDERSTORMS DEVELOPED AROUND TAYLOR TEXAS AT 230 PM CDT AND MOVED WEST SOUTHWEST ACROSS NORTHERN TRAVIS AND SOUTHERN WILLIAMSON COUNTIES UNTIL 5 PM. TAYLOR MEASURED 2.30 INCHES OF RAIN. NUMEROUS REPORTS OF PEA TO MARBLE SIZE HAIL WERE RECEIVED ALL ALONG THE STORM TRACK. RAINFALL OF 3/4 TO 11/4 INCHES WAS COMMON ACROSS THE NORTHERN PART OF AUSTIN. HIGHEST WxIND GUST AT THE AIRPORT WAS 36 MPH AT 430 PM. NO SIGNIFICANT DAMAGE NOR FLOODING WAS REPORTED. DURING EARLY PERIODS OF THIS STORM RADAR TOPS EXCEEDED 60 THOUSAND FEET.
Special weather statement, Jul 1, 5:47 PM CDT, 50 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO TX 545 PM CDT WED JUL 1 1987 ...STRONG THUNDERSTORMS MOVING INTO COMAL AND KENDALL COUNTIES... STRONG THUNDERSTORMS WHICH MOVED THROUGH AUSTIN EARLIER CONTINUED TO MOVE SOUTHWESTWARD TOWARD COMAL AND KENDALL COUNTIES. THESE THUNDERSTORMS WILL BE MOVING INTO THESE COUNTIES DURING THE NEXT HOUR AND WILL BE CROSSING THE CANYON LAKE AREA AND THE GUADALUPE RIVER AREA ABOVE CANYON LAKE DURING THE NEXT COUPLE OF HOURS. HEAVY RAIN...FREQUENT LIGHTNING...GUSTY WINDS...AND POSSIBLE HAIL WILL LIKELY ACCOMPANY THESE THUNDERSTORMS.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 1, 3:08 PM CDT | Severe Thunderstorm Warning | EWX | Travis, Williamson | 67 min |
| Jul 1, 6:08 PM CDT | Severe Thunderstorm Warning | EWX | Blanco | 67 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.