Alert archive / Texas / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 151, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Jun 12, 1999, 9:18 PM CDT for Kendall County, Texas. It was in force for 57 min. 2 reports came from inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.
The facts
- Issued
- Jun 12, 1999, 9:18 PM CDT (02:18 UTC)
- Expired
- Jun 12, 1999, 10:15 PM CDT
- In force
- 57 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Kendall County, TX
The radar
The Austin/San Antonio radar (KEWX), 46 km from the middle of the area, began a volume at 02:18 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 12, 9:50 PM CDT | Thunderstorm Wind | Geronimo, TX | |
| Jun 12, 10:10 PM CDT | Thunderstorm Wind | Schertz, TX |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Del Rio, TX (KDRT), launched 00:00Z, 2.3 hours before the alert went out and 228 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
- 1519 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 2075 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- -29 m²/s²
- 0-3 km storm-relative helicity
- 31 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
075 WUUS1 KSAT 130219 RRA SVRSAT TXC029-091-187-259-130315- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 918 PM CDT SAT JUN 12 1999 THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING... KENDALL, GUADALUPE, COMAL, AND BEXAR COUNTIES IN TEXAS * UNTIL 1015 PM CDT * AT 916 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SEVERE THUNDERSTORMS OVER THE PREMENTIONED COUNTIES. THESE STORMS CONINTUED TO DRIFT SOUTH AND SOUTHWEST AT 5 TO 10 MPH. THE MAIN THREAT WITH THESE STORMS WILL BE FROM HIGH WINDS AND VERY HEAVY RAIN. IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...SEVERE THUNDERSTORMS CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS IN EXCESS OF 55 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN. HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS LOW WATER CROSSINGS... DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS AS THEY MAY BE WASHED OUT. WATER LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE. SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS. LAT...LON 2966 9879 2925 9858 2964 9779 2999 9857
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, Jun 12, 6:00 PM CDT, 3 hours 18 minutes before
TXZ171>173-183>194-202>209-217>225-228-131000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 600 PM CDT SAT JUN 12 1999 THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TONIGHT AND SUNDAY ACROSS THE WESTERN SECTIONS OF SOUTH CENTRAL TEXAS AND THE HILL COUNTRY. THIS SLIGHT RISK AREA INCLUDES THE CITIES OF DEL RIO AND KERRVILLE. ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE OVER THE REST OF THE AREA TONIGHT AND SUNDAY. STRONG THUNDERSTORMS HAVE AGAIN DEVELOPED OVER FAR WEST TEXAS IN THE BIG BEND REGION. THESE THUNDERSTORMS WILL LIKELY MOVE EASTWARD INTO THE WESTERN SECTIONS OF SOUTH CENTRAL TEXAS THIS EVENING. THE MAIN THREAT WILL BE FROM LARGE HAIL AND DAMAGING WINDS. RAINFALL AMOUNTS WILL AVERAGE ONE QUARTER TO ONE HALF INCH WITH LOCALLY HEAVY AMOUNTS OF ONE TO THREE INCHES POSSIBLE MAINLY OVER THE WESTERN HILL COUNTRY AND SOUTH CENTRAL TEXAS. CAMPERS AND OTHERS INVOLVED IN OUTDOOR ACTIVITIES SHOULD BE READY TO SEEK SAFE SHELTER IF A THUNDERSTORM OCCURS. THE HAZARDOUS WEATHER OUTLOOK NORMALLY WILL BE UPDATED BY MEANS OF THE ZONE FORECASTS...SHORT TERM FORECAST...WATCHES...WARNINGS AND ADVISORIES. THE HAZARDOUS WEATHER OUTLOOK ITSELF WILL BE UPDATED ONLY IF UNEXPECTED HAZARDOUS WEATHER DEVELOPS OR IF EXPECTED HAZARDOUS WEATHER NO LONGER IS FORECAST TO DEVELOP. FOR INFORMATION ON WEATHER THREATS IN AREAS SURROUNDING SOUTH CENTRAL TEXAS...PLEASE REFER TO THE HAZARDOUS WEATHER OUTLOOKS FROM NWS OFFICES IN MIDLAND...SAN ANGELO...FORT WORTH... HOUSTON/GALVESTON AND CORPUS CHRISTI.
Special weather statement, Jun 12, 6:00 PM CDT, 3 hours 18 minutes before
TXZ171>173-183>194-202>209-217>225-228-131000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 600 PM CDT SAT JUN 12 1999 THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TONIGHT AND SUNDAY ACROSS THE WESTERN SECTIONS OF SOUTH CENTRAL TEXAS AND THE HILL COUNTRY. THIS SLIGHT RISK AREA INCLUDES THE CITIES OF DEL RIO AND KERRVILLE. ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE OVER THE REST OF THE AREA TONIGHT AND SUNDAY. STRONG THUNDERSTORMS HAVE AGAIN DEVELOPED OVER FAR WEST TEXAS IN THE BIG BEND REGION. THESE THUNDERSTORMS WILL LIKELY MOVE EASTWARD INTO THE WESTERN SECTIONS OF SOUTH CENTRAL TEXAS THIS EVENING. THE MAIN THREAT WILL BE FROM LARGE HAIL AND DAMAGING WINDS. RAINFALL AMOUNTS WILL AVERAGE ONE QUARTER TO ONE HALF INCH WITH LOCALLY HEAVY AMOUNTS OF ONE TO THREE INCHES POSSIBLE MAINLY OVER THE WESTERN HILL COUNTRY AND SOUTH CENTRAL TEXAS. CAMPERS AND OTHERS INVOLVED IN OUTDOOR ACTIVITIES SHOULD BE READY TO SEEK SAFE SHELTER IF A THUNDERSTORM OCCURS. THE HAZARDOUS WEATHER OUTLOOK NORMALLY WILL BE UPDATED BY MEANS OF THE ZONE FORECASTS...SHORT TERM FORECAST...WATCHES...WARNINGS AND ADVISORIES. THE HAZARDOUS WEATHER OUTLOOK ITSELF WILL BE UPDATED ONLY IF UNEXPECTED HAZARDOUS WEATHER DEVELOPS OR IF EXPECTED HAZARDOUS WEATHER NO LONGER IS FORECAST TO DEVELOP. FOR INFORMATION ON WEATHER THREATS IN AREAS SURROUNDING SOUTH CENTRAL TEXAS...PLEASE REFER TO THE HAZARDOUS WEATHER OUTLOOKS FROM NWS OFFICES IN MIDLAND...SAN ANGELO...FORT WORTH... HOUSTON/GALVESTON AND CORPUS CHRISTI.
Special weather statement, Jun 12, 8:17 PM CDT, 1 hour 1 minute before
TXZ191-205>208-130215- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 817 PM CDT SAT JUN 12 1999 ...SEVERE THUNDERSTORM WARNING FOR BASTROP AND CALDWELL COUNTIES HAS EXPIRED... THE SEVERE THUNDERSTORMS OVER BASTROP AND CALDWELL COUNTIES HAVE DECREASED IN INTENSITY...HOWEVER THE STORMS REMAINED STRONG AND COULD BECOME SEVERE AGAIN AS THEY MOVE SOUTHWESTWARD AT NEAR 25 MPH TOWARD COMAL AND GUADALUPE COUNTIES. THIS CLUSTER OF STRONG THUNDERSTORMS FROM BETWEEN NEW BRAUNFELS... BUDA AND LULING CONTINUES TO MOVE SOUTHWESTWARD NEAR I35 TOWARDS NEW BRAUNFELS AND CANYON LAKE. THESE STORMS WILL PRODUCE BRIEF HEAVY RAIN...STRONG GUSTY WINDS AND DANGEROUS LIGHTNING FOR THE NEXT HOUR. CAMPERS...BOATERS AND OTHERS INVOLVED IN OUTDOOR ACTIVITIES SHOULD BE READY TO SEEK SAFE SHELTER IF A THUNDERSTORM THREATENS.
Special weather statement, Jun 12, 8:17 PM CDT, 1 hour 1 minute before
TXZ191-205>208-130215- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 817 PM CDT SAT JUN 12 1999 ...SEVERE THUNDERSTORM WARNING FOR BASTROP AND CALDWELL COUNTIES HAS EXPIRED... THE SEVERE THUNDERSTORMS OVER BASTROP AND CALDWELL COUNTIES HAVE DECREASED IN INTENSITY...HOWEVER THE STORMS REMAINED STRONG AND COULD BECOME SEVERE AGAIN AS THEY MOVE SOUTHWESTWARD AT NEAR 25 MPH TOWARD COMAL AND GUADALUPE COUNTIES. THIS CLUSTER OF STRONG THUNDERSTORMS FROM BETWEEN NEW BRAUNFELS... BUDA AND LULING CONTINUES TO MOVE SOUTHWESTWARD NEAR I35 TOWARDS NEW BRAUNFELS AND CANYON LAKE. THESE STORMS WILL PRODUCE BRIEF HEAVY RAIN...STRONG GUSTY WINDS AND DANGEROUS LIGHTNING FOR THE NEXT HOUR. CAMPERS...BOATERS AND OTHERS INVOLVED IN OUTDOOR ACTIVITIES SHOULD BE READY TO SEEK SAFE SHELTER IF A THUNDERSTORM THREATENS.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 7:18 PM CDT | Severe Thunderstorm Warning | EWX | Bastrop, Caldwell | 57 min |
| Jun 12, 8:30 PM CDT | Flash Flood Warning | EWX | Val Verde | 3 hr |
| Jun 12, 8:35 PM CDT | Severe Thunderstorm Warning | EWX | Bexar, Comal, Guadalupe, Hays | 55 min |
| Jun 12, 9:18 PM CDT | Severe Thunderstorm Warning | EWX | Bexar, Comal, Guadalupe | 57 min |
| Jun 12, 9:20 PM CDT | Flash Flood Warning | EWX | Bexar, Comal, Guadalupe | 100 min |
| Jun 12, 10:10 PM CDT | Severe Thunderstorm Warning | EWX | Bexar | 60 min |
| Jun 12, 10:20 PM CDT | Severe Thunderstorm Warning | EWX | Bandera | 65 min |
| Jun 12, 11:01 PM CDT | Flash Flood Warning | EWX | Bandera, Kerr | 2 hr |
| Jun 12, 11:01 PM CDT | Severe Thunderstorm Warning | EWX | Bandera, Kerr | 2 hr |
| Jun 12, 11:35 PM CDT | Severe Thunderstorm Warning | EWX | Kinney, Maverick, Uvalde, Zavala | 70 min |
| Jun 12, 11:35 PM CDT | Severe Thunderstorm Warning | EWX | Dimmit | 70 min |
| Jun 12, 11:51 PM CDT | Severe Thunderstorm Warning | EWX | Real | 64 min |
| Jun 13, 12:39 AM CDT | Flash Flood Warning | EWX | Uvalde, Zavala | 116 min |
| Jun 13, 1:00 AM CDT | Severe Thunderstorm Warning | EWX | Frio, Medina | 75 min |
| Jun 13, 3:26 PM CDT | Flash Flood Warning | EWX | Williamson | 3 hr |
Nearby
Severe Thunderstorm Warnings in Texas, 1999Every severe thunderstorm warning in 1999
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.