Alert archive / Texas / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 77, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 18, 1987, 9:13 PM CDT for Real County, Texas. It was in force for 62 min.
The area
The counties it named.
The facts
- Issued
- May 18, 1987, 9:13 PM CDT (02:13 UTC)
- Expired
- May 18, 1987, 10:15 PM CDT
- In force
- 62 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Real 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 00:00Z, 2.2 hours before the alert went out and 111 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
- 3088 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 821 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 85 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 2.9
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KSAT 190213
SVRSAT
TXC385-190315-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
913 PM CDT MON MAY 18 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 1015 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY...
IN SOUTH TEXAS
...REAL
A SEVERE THUNDERSTORM WAS LOCATED OVER SOUTHERN REAL COUNTY JUST
SOUTH OF LEAKEY TEXAS. THIS SEVERE THUNDERSTORM IS MOVING NORTHEAST
ABOUT 20 MPH AND SHOULD MOVE THROUGH OR NEAR LEAKEY WITHIN THE NEXT
HOUR. THIS THUNDERSTORM CONTAINS DAMAGING WINDS...HAIL AND VERY
HEAVY RAIN. RESIDENTS OF REAL COUNTY...AND ESPECIALLY LEAKEY...SHOULD
BE ALERT FOR THIS SEVERE 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.
YOU SHOULD ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY YOUR
SEVERE WEATHER REPORT_S TO THE LOCAL NATIONAL WEATHER SERVICE OFFICE.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 18, 5:08 PM CDT, 4 hours 5 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN TX 510 PM CDT MON MAY 18 1987 AT 505 PM AUSTIN WEATHER RADAR INDICATED THUNDERSTORMS OVER MILLS AND SAN SABA COUNTIES. THESE THUNDERSTORMS ARE MOVING VERY SLOWLY TO THE NORTHEAST. RAINFALL RATES FROM THESE STORMS ARE INTENSE.. 1 TO 2 INCHES PER HOUR. WITH THE SLOW MOVEMENT OF THESE THUNDERSTORMS..LOCALLY HEAVY RAIN.. SMALL HAIL AND DANGEROUS LIGHTNING IS OCCURRING. SOME FLOODING MAY BE OCCURRING ON ROADWAYS AND SMALL STREAMS.
Special weather statement, May 18, 5:12 PM CDT, 4 hours 1 minute before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX 512 PM CDT MON MAY 18 1987 AT 500 PM CDT VERY STRONG THUNDERSTORMS REMAIN IN THE COMSTOCK AREA AND EXTENDED NORTHEAST TO SONORA. OTHER THUNDERSTORMS AND RAINSHOWERS WERE DEVELOPING 10 MILES SOUTHEAST TO 10 MILES SOUTH OF DEL RIO. THE STRONGEST STORM REMAINED NEAR COMSTOCK. THESE STORMS WERE MOVING TO THE NORTH AT 15 MPH. HEAVY RAIN HAS BEEN REPORTED AT COMSTOCK. SINCE THESE STORMS CONTINUE TO DEVELOP IN THE SAME AREA AROUND COMSTOCK FLOODING OF LOW WATER CROSSINGS AND SMALL STREAMS IS LIKELY. HEAVY RAIN...SMALL HAIL...FREQUENT DANGEROUS LIGHTNING AND STRONG GUSTY WINDS ARE POSSIBLE WITH THESE STORMS. BOATERS ON LAKE AMISTAD AND THE SURROUNDING RIVERS SHOULD CONTINE TO REMAIN ALERT AND PLAN TO SEEK SAFE HARBOR IF CONDITIONS WORSEN.
Special weather statement, May 18, 6:24 PM CDT, 2 hours 49 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX 625 PM CDT MON MAY 18 1987 ...INTENSE THUNDERSTORMS OBSERVED IN THE DEL RIO AREA... AT 620 PM CDT INTENSE THUNDERSTORMS WITH RAINSHOWERS...>GUSTY WINDS AND FREQUENT DANGEROUS LIGHTNING WERE OBSERVED AT THE DEL RIO INTERNATIONAL AIRPORT. FLOODING OF LOW WATER CROSSINGS AND LOW LYING AREAS IN DEL RIO IS LIKELY AS THESE STORMS PASS THROUGH THE AREA.
Special weather statement, May 18, 6:55 PM CDT, 2 hours 18 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO TX 655 PM CDT MON MAY 18 1987 ...STRONG THUNDERSTORM NEAR EAGLE PASS TEXAS... A STRONG THUNDERSTORM HAS MOVED OUT OF MEXICO AND IS LOCATED NEAR EAGLE PASS TEXAS. THIS THUNDERSTORM CONTAINS VERY HEAVY RAIN...SMALL HAIL AND GUSTY WINDS. THE THUNDERSTORM IS MOVING NORTH ABOUT 15 MPH AND SHOULD BE OUT OF THE CITY IN ABOUT ONE HALF HOUR. OTHER THUNDERSTORMS CONTINUE TO FOhRM OVER MEXICO AND ARE MOVING EAST TOWARDS TEXAS.
Special weather statement, May 18, 8:49 PM CDT, 24 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO TX 855 PM CDT MON MAY 18 1987 ...STRONG THUNDERSTORM MOVING THROUGH UVALDE COUNTY... A LINE OF THUNDERSTORMS CONTINUES TO MOVE ACROSS THE TEXAS HILL COUNTRY AND ADJOINING AREAS. THE STRONGEST THUNDERSTORM WAS LOCATED JUST SOUTHWEST OF THE CITY OF UVALDE AND WAS MOVING NORTHEAST ABOUT 20 MPH. THIS THUNDERSTORM CONTAINS VERY HEAVY RAIN...HAIL AND GUSTY WINDS. OTHER THAUNDERSTORMS ARE FORMING NORTH OF LAREDO AND ARE ALSO MOVING NORTHEAST. IF THESE THUNDERSTORMS CONTINUE THEIR PRESENT RATE OF MOVEMENT...THEY WILL MOVE THROUGH BEXAR COUNTY SHORTLY AFTER MIDNIGHT.
Special weather statement, May 18, 9:10 PM CDT, 3 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX 910 PM CDT MON MAY 18 1987 AT 905 PM CDT A LARGE THUNDERSTORM WAS 5 MILES SOUTH OF DEL RIO. RAINSHOWERS WERE LOCATED IN THE EASTERN HALF OF VAL VERDE COUNTY. THE THUNDERSTORMS WERE MOVING NORTH AT 15 MPH. HEAVY RAIN...SMALL HAIL...FREQUENT DANGEROUS LIGHTNING AND STRONG GUSTY WINDS ARE POSSIBLE WITH THESE STORMS. BOATERS ON LAKE AMISTAD SHOULD PLAN TO MOVE TO SAFE HARBOR SHOULD THEU THUNDERSTORMS BEGIN TO MOVE TOWARDS THE LAKE.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 18, 7:19 PM CDT | Severe Thunderstorm Warning | EWX | Maverick | 56 min |
| May 18, 7:35 PM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 60 min |
| May 19, 10:58 AM CDT | Flash Flood Warning | EWX | Kendall | 2 hr |
| May 19, 3:15 PM CDT | Severe Thunderstorm Warning | EWX | Bexar | 60 min |
| May 19, 4:14 PM CDT | Severe Thunderstorm Warning | EWX | Bexar | 61 min |
| May 19, 4:23 PM CDT | Severe Thunderstorm Warning | EWX | Hays, Travis | 67 min |
| May 19, 5:03 PM CDT | Tornado Warning | EWX | Guadalupe | 57 min |
| May 19, 6:06 PM CDT | Severe Thunderstorm Warning | EWX | Bexar, Wilson | 54 min |
| May 19, 6:29 PM CDT | Severe Thunderstorm Warning | EWX | Travis | 61 min |
| May 19, 6:39 PM CDT | Tornado Warning | EWX | Wilson | 66 min |
| May 19, 6:59 PM CDT | Severe Thunderstorm Warning | EWX | Bexar | 61 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.