Alert archive / Texas / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 101, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 4, 1991, 3:08 PM CDT for Llano County, Texas. It was in force for 67 min.
The area
The counties it named.
The facts
- Issued
- May 4, 1991, 3:08 PM CDT (20:08 UTC)
- Expired
- May 4, 1991, 4:15 PM CDT
- In force
- 67 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Llano County, TX
The nearest sounding before it
Stephenville/Cla, TX (KSEP), launched 12:00Z, 8.1 hours before the alert went out and 177 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
- 1326 J/kg
- Mixed-layer CIN
- -216 J/kg
- Mixed-layer LCL
- 898 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 64 m²/s²
- 0-3 km storm-relative helicity
- 81 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 KAUS 042010 SVRAUS TXC299-042115- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN TX 308 PM CDT SAT MAY 4 1991 THE NATIONAL WEATHER SERVICE IN AUSTIN HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 415 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTH CENTRAL TEXAS ...LLANO COUNTY AT 306 PM CDT RADAR SHOWED A SEVERE THUNDERSTORM NEAR OXFORD MOVING TOWARD THE EAST AT 20 MPH. THIS STORM WILL LIKELY CONTAIN 3/4 INCH HAIL AND VERY STRONG SURFACE WINDS. 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, May 4, 1:11 PM CDT, 1 hour 57 minutes before
TXZ034-035-038-039-040-054-042000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SAN ANTONIO TX 110 PM CDT SAT MAY 4 1991 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR TEXAS HILL COUNTRY AND THE EDWARDS PLATEAU THROUGH 3 PM THIS AFTERNOON... ...A FLOOD AND FLASH FLOOD WATCH IS IN EFFECT FOR MOST OF SOUTH CENTRAL AND SOUTHEAST TEXAS THROUGH TONIGHT... SCATTERED SHOWERS AND THUNDERSTORMS CONTINUED AT 105 PM IN AN AREA NORTH OF DEL RIO TO ROCKSPRINGS TO AUSTIN LINE. LITTLE CHANGE IN MOVEMENT HAD OCCURRED IN THE PAST HOUR. THE AREA WAS STILL MOVING TO THE EAST AT 15 MPH WHILE THE INDIVIDUAL STORMS WERE MOVING TO THE NORTHEAST AT 20 MPH. HEAVY RAIN WAS REPORTED BETWEEN JUNCTION AND ROCKSPRINGS AND FROM ROCKSPRINGS SOUTHWARD TO NEAR BRACKETTVILLE. THESE STORMS HAD FORMED ALONG THE EDGE OF A TROUGH OF LOW PRESSURE AND MUCH DRIER AIR MOVING IN FROM THE WEST. RAINFALL AVERAGES ACROSS EDWARDS COUNTY ARE ESTIMATED AT 1/2 TO 3/4 INCH WITH ISOLATED LOCATIONS HAVING RECEIVED NEARLY 2 INCHES. RAINFALL FROM 10 AM TO NOON HAD BEEN OVER THE WESTERN THIRD OF THE COUNTY...WELL WEST OF THE CITY OF ROCKSPRINGS. RAINFALL SINCE NOON HAS BEEN IN THE CENTRAL AND EASTERN SECTIONS OF THE COUNTY...INCLUDING THE CITY OF ROCKSPRINGS. SMALL HAIL WAS REPORTED IN THIS AREA OF STRONG THUNDERSTORMS JUST SOUTH OF SONORA AROUND 1230 PM. PEA-SIZED TO MARBLE-SIZED HAIL WAS REPORTED AT JUNCTION NEAR 100 PM. AN UPPER LEVEL DISTURBANCE NEAR THE TEXAS BIG BEND THIS AFTERNOON HAS CONTINUED TO MOVE NORTHEASTWARD. IT WILL BE IN A POSITION TO HELP PRODUCE SEVERE WEATHER OVER THE HILL COUNTRY AND EDWARDS PLATEAU THIS AFTERNOON.
Special weather statement, May 4, 1:41 PM CDT, 1 hour 27 minutes before
TXZ054-042000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX 142 PM CDT SAT MAY 4 1991 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR VAL VERDE COUNTY UNTIL 300 PM... AT 135 PM CDT RADAR INDICATED NO PRECIPITATION IN VAL VERDE COUNTY. THE THUNDERSTORMS REPORTED EARLIER HAVE MOVED EAST OF THE COUNTY AND WERE LOCATED FROM BRACKETVILLE TO ROCKSPRINGS AND FURTHER NORTH. MOVEMENT WAS TO THE EAST AT 15 MPH. LARGE HAIL...DANGEROUS LIGHTNING AND DAMAGING THUNDERSTORM WINDS ARE POSSIBLE WITH THESE STORMS. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. STAY TUNED TO NOAA WEATHER RADIO...LOCAL RADIO AND TV STATIONS FOR FURTHER INFORMATION.
Special weather statement, May 4, 1:44 PM CDT, 1 hour 24 minutes before
TXZ030-034>037-042030 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN TX 132 PM CDT SAT MAY 04 1991 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 4 PM CDT FOR ALL OF CENTRAL TEXAS... ...FLASH FLOOD WATCH IN EFFECT THROUGH TONIGHT... AT 129 PM CDT...RADAR SHOWED A LINE OF STRONG THUNDERSTORMS FROM DEL RIO TO EAST OF JUNCTION CITY TO EAST OF ABILENE. THIS LINE OF STORMS WAS MOVING TOWARDTHE EAST AT 15 MPH AND WILL BE AFFECTING MILLS...LAMPASAS...LLANO..AND GILLESPIE COUNTIES DURING THE NEXT SEVERAL HOURS. OTHER SHOWERS AND THUNDERSTORMS STRETCHED ACROSS CENTRAL TEXAS FROM MARBLE FALLS EASTWARD THROUGH BARTLETT TO COLLEGE STATION. MOVEMENT WAS TOWARD THE NORTHEAST AT 25 MPH. PEA TO MARBLE SIZED HAIL HAS BEEN REPORTED AT JUNCTION WITH THE THUNDERSTORMS TO THE WEST. HEAVY RAINFALL WILL ALSO POSE A THREAT DUE TO THE SLOW MOVEMENT OF THE LINE OF THUNDERSTORMS. A FLASH FLOOD WATCH REMAINS IN EFFECT FOR ALL OF CENTRAL TEXAS AND THE HILL COUNTRY...SO STAY TUNED TO THE LATEST UPDATES ON THIS DANGEROUS WEATHER SITUATION.
Special weather statement, May 4, 1:59 PM CDT, 1 hour 9 minutes before
TXZ054-042000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DEL RIO TX 200 PM CDT SAT MAY 4 1991 ...THE SEVERE THUNDERSTORM WATCH FOR VAL VERDE COUNTY HAS BEEN CANCELED... AT 158 PM CDT RADAR INDICATED NO PRECIPITATION IN VAL VERDE COUNTY. THE THUNDERSTORMS REPORTED EARLIER HAVE MOVED EAST OF THE COUNTY AND WERE LOCATED FROM BRACKETVILLE TO ROCKSPRINGS AND FURTHER NORTH. MOVEMENT WAS TO THE EAST AT 15 MPH.
Special weather statement, May 4, 2:51 PM CDT, 17 minutes before
TXZ030-034>036-042045 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN TX 243 PM CDT SAT MAY 04 1991 ...TORNADO WATCH HAS BEEN ISSUED MILLS...SAN SABA...LAMPASAS...LLANO... BURNET...WILLIAMSON...GILLESPIE...BLANCO...HAYS...CALDWELL...BASTROP... AND TRAVIS...UNTIL 9PM CDT... ...SEVERE THUNDERSTORM WATCH FOR CENTRAL TEXAS HAS BEEN CANCELLED... ...FLASH FLOOD WATCH FOR SOUTH CENTRAL TEXAS AND ADJACENT HILL COUNTRY THROUGH TONIGHT... AT 240 PM CDT...RADAR SHOWED A LINE OF THUNDERSTORMS FROM NORTHEAST OF DEL RIO TO HARPER TO LLANO CITY TO STAR. THIS LINE OF THUNDERSTORMS WAS MOVING TOWARD THE EAST AT 20 MPH. A THUNDERSTORM PRODUCING SMALL HAIL...VERY GUSTY SURFACE WINDS...AND VERY HEAVY RAINFALL WAS LOCATED OVER NORTH CENTRAL GILLESPIE COUNTY AND LLANO COUNTY. . . . THESE THUNDERSTORMS WILL BE MOVING OVER THE LAKE BUCHANAN VICINITY BETWEEN 2 PM AMD 230 PM CDT. PERSONS ON THE LAKE SHOULD IMMEDIATELY RETURN TO SHOlRE AND SEEK A PLACE OF SHELTER. STAY TUNED FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, May 4, 2:58 PM CDT, 10 minutes before
TXZ030-034>036-042045 SPECIAL WEATHER STATEMENT...CORRECTION FOR TIME NATIONAL WEATHER SERVICE AUSTIN TX 243 PM CDT SAT MAY 04 1991 ...TORNADO WATCH HAS BEEN ISSUED MILLS...SAN SABA...LAMPASAS...LLANO... BURNET...WILLIAMSON...GILLESPIE...BLANCO...HAYS...CALDWELL...BASTROP... AND TRAVIS...UNTIL 9PM CDT... ...SEVERE THUNDERSTORM WATCH FOR CENTRAL TEXAS HAS BEEN CANCELLED... ...FLASH FLOOD WATCH FOR SOUTH CENTRAL TEXAS AND ADJACENT HILL COUNTRY THROUGH TONIGHT... AT 240 PM CDT...RADAR SHOWED A LINE OF THUNDERSTORMS FROM NORTHEAST OF DEL RIO TO HARPER TO LLANO CITY TO STAR. THIS LINE OF THUNDERSTORMS WAS MOVING TOWARD THE EAST AT 20 MPH. A THUNDERSTORM PRODUCING SMALL HAIL...VERY GUSTY SURFACE WINDS...AND VERY HEAVY RAINFALL WAS LOCATED OVER NORTH CENTRAL GILLESPIE COUNTY AND LLANO COUNTY. . . . THESE THUNDERSTORMS WILL BE MOVING OVER THE LAKE BUCHANAN VICINITY BETWEEN 3 PM AMD 330 PM CDT. PERSONS ON THE LAKE SHOULD IMMEDIATELY RETURN TO SHORE AND SEEK A PLACE OF SHELTER. STAY TUNED FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 7:08 PM CDT | Severe Thunderstorm Warning | EWX | Burnet, Llano, San Saba | 67 min |
| May 3, 8:49 PM CDT | Severe Thunderstorm Warning | EWX | Williamson | 56 min |
| May 3, 11:45 PM CDT | Severe Thunderstorm Warning | EWX | Lee | 45 min |
| May 4, 4:09 PM CDT | Severe Thunderstorm Warning | EWX | Bexar | 66 min |
| May 4, 4:12 PM CDT | Severe Thunderstorm Warning | EWX | Blanco | 48 min |
| May 4, 4:40 PM CDT | Severe Thunderstorm Warning | EWX | Hays | 50 min |
| May 4, 4:46 PM CDT | Severe Thunderstorm Warning | EWX | Comal | 59 min |
| May 4, 4:49 PM CDT | Severe Thunderstorm Warning | EWX | Travis, Williamson | 41 min |
| May 4, 4:55 PM CDT | Severe Thunderstorm Warning | EWX | Guadalupe | 65 min |
| May 4, 5:13 PM CDT | Severe Thunderstorm Warning | EWX | Travis | 62 min |
| May 4, 6:15 PM CDT | Severe Thunderstorm Warning | EWX | Gonzales | 60 min |
| May 4, 6:25 PM CDT | Severe Thunderstorm Warning | EWX | Bastrop | 50 min |
| May 4, 6:42 PM CDT | Tornado Warning | EWX | Gonzales | 33 min |
| May 4, 6:58 PM CDT | Tornado Warning | EWX | DeWitt, Lavaca | 62 min |
Nearby
Severe Thunderstorm Warnings in Texas, 1991Every severe thunderstorm warning in 1991
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.