Alert archive / Texas / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 152, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Jun 12, 1999, 10:10 PM CDT for Bexar County, Texas. It was in force for 60 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jun 12, 1999, 10:10 PM CDT (03:10 UTC)
- Expired
- Jun 12, 1999, 11:10 PM CDT
- In force
- 60 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Bexar County, TX
The radar
The Austin/San Antonio radar (KEWX), 55 km from the middle of the area, began a volume at 03:11 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, 10:10 PM CDT | Thunderstorm Wind | Schertz, TX | |
| Jun 12, 10:50 PM CDT | Thunderstorm Wind | Leon Vly, 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
Corpus Christi, TX (KCRP), launched 00:00Z, 3.2 hours before the alert went out and 223 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
- 2849 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 841 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 99 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 3.7
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, Jun 12, 6:00 PM CDT, 4 hours 10 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, 4 hours 10 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 53 minutes 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 53 minutes 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, 9:18 PM CDT | Severe Thunderstorm Warning | EWX | Kendall | 57 min |
| Jun 12, 9:20 PM CDT | Flash Flood Warning | EWX | Bexar, Comal, Guadalupe | 100 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.