Alert archive / Texas / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 75, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 9, 1999, 11:07 PM CDT for Edwards County, Val Verde County, Texas. It was in force for 58 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 9, 1999, 11:07 PM CDT (04:07 UTC)
- Expired
- May 10, 1999, 12:05 AM CDT
- In force
- 58 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
Counties Edwards County, TX, Val Verde County, TX
The radar
The Laughlin AFB radar (KDFX), 86 km from the middle of the area, began a volume at 04:06 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 9, 8:00 PM CDT | Tornado Watch | SPC | 4 hr |
The nearest sounding before it
Del Rio, TX (KDRT), launched 00:00Z, 4.1 hours before the alert went out and 64 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
- 4039 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 1039 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 91 m²/s²
- 0-3 km storm-relative helicity
- 172 m²/s²
- Significant tornado parameter
- 2.5
- Supercell composite
- 15.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSAT 100407 RRA SVRSAT TXC137-465-100505- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1107 PM CDT SUN MAY 9 1999 THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... VAL VERDE COUNTY IN TEXAS EDWARDS COUNTY IN TEXAS * UNTIL 1205 AM CDT * AT 1100 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SEVERE THUNDERSTORMS 5 AND 15 MILES SOUTH OF INTERSECTION OF US HIGHWAY 277 AND STATE ROAD 55... MOVING NORTHEAST AT 20 MPH. * THE SEVERE THUNDERSTORMS WILL MOVE ALONG RURAL AREAS OF... HIGHWAY 277 NORTH OF LOMA ALTA TO THE INTERSECTION OF HIGHWAYS 277 AND 55 THROUGH MIDNIGH\T. DAMAGING WINDS AND LARGE HAIL ARE LIKELY. SEEK SHELTER IMMEDIATELY! PASHOS
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 9, 6:00 PM CDT, 5 hours 7 minutes before
TXZ171>173-183>194-202>209-217>225-228-101100- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 600 PM CDT SUN MAY 9 1999 ...TORNADO WATCH IS IN EFFECT TIL 9 PM FOR VAL VERDE COUNTY... SHOWERS AND THUNDERSTORMS ARE DEVELOPING OVER PORTIONS OF SOUTHWEST TEXAS AND WILL MOVE EASTWARD TONIGHT. THE EXTREME WESTERN PORTIONS OF THE TEXAS HILL COUNTRY AND SOUTH CENTRAL TEXAS HAVE A CHANCE OF THUNDERSTORM DEVELOPMENT THIS EVENING WITH SOME STORMS POSSIBLY SEVERE. COUNTIES IN THE WATCH AREA MAY HAVE THE DEVELOPMENT OF TORNADOES... HAIL TO THREE INCHES IN DIAMETER...STRONG THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING. ADDITIONAL SHOWER AND THUNDERSTORM DEVELOPMENT IS ALSO EXPECTED MONDAY MORNING AREAWIDE WITH RAIN ENDING BECOMING PARTLY CLOUDY MONDAY AFTERNOON. 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, May 9, 8:15 PM CDT, 2 hours 52 minutes before
TXZ171>173-183>194-202>209-217>225-228-101100- HAZARDOUS WEATHER OUTLOOK...UPDATE NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 815 PM CDT SUN MAY 9 1999 ...A TORNADO WATCH IS IN EFFECT TIL 12 MIDNIGHT FOR THE COUNTIES OF VAL VERDE...KINNEY...AND EDWARDS... STRONG THUNDERSTORMS CONTINUE TO DEVELOP OVER SOUTHWEST TEXAS NEAR VAL VERDE COUNTY AND WILL MOVE EASTWARD TONIGHT. THE EXTREME WESTERN PORTIONS OF THE TEXAS HILL COUNTRY AND SOUTH CENTRAL TEXAS HAVE A CHANCE OF THUNDERSTORM DEVELOPMENT TONIGHT WITH SOME STORMS POSSIBLY SEVERE. COUNTIES IN THE WATCH AREA MAY HAVE THE DEVELOPMENT OF TORNADOES... HAIL TO THREE INCHES IN DIAMETER...STRONG THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING. ADDITIONAL SHOWER AND THUNDERSTORM DEVELOPMENT IS ALSO EXPECTED MONDAY MORNING AREAWIDE THEN BECOMING PARTLY CLOUDY MONDAY AFTERNOON. 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, May 9, 8:15 PM CDT, 2 hours 52 minutes before
TXZ171>173-183>194-202>209-217>225-228-101100- HAZARDOUS WEATHER OUTLOOK...UPDATE NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 815 PM CDT SUN MAY 9 1999 ...A TORNADO WATCH IS IN EFFECT TIL 12 MIDNIGHT FOR THE COUNTIES OF VAL VERDE...KINNEY...AND EDWARDS... STRONG THUNDERSTORMS CONTINUE TO DEVELOP OVER SOUTHWEST TEXAS NEAR VAL VERDE COUNTY AND WILL MOVE EASTWARD TONIGHT. THE EXTREME WESTERN PORTIONS OF THE TEXAS HILL COUNTRY AND SOUTH CENTRAL TEXAS HAVE A CHANCE OF THUNDERSTORM DEVELOPMENT TONIGHT WITH SOME STORMS POSSIBLY SEVERE. COUNTIES IN THE WATCH AREA MAY HAVE THE DEVELOPMENT OF TORNADOES... HAIL TO THREE INCHES IN DIAMETER...STRONG THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING. ADDITIONAL SHOWER AND THUNDERSTORM DEVELOPMENT IS ALSO EXPECTED MONDAY MORNING AREAWIDE THEN BECOMING PARTLY CLOUDY MONDAY AFTERNOON. 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, May 9, 10:45 PM CDT, 22 minutes before
TXZ171-172-183>190-101100- HAZARDOUS WEATHER OUTLOOK...UPDATE NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1045 PM CDT SUN MAY 9 1999 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT TIL 4 AM CDT FOR THE COUNTIES OF VAL VERDE...EDWARDS...REAL...KERR...KENDALL... BLANCO...GILLESPIE...LLANO AND BURNET... STRONG THUNDERSTORMS WILL CONTINUE TO DEVELOP OVER SOUTHWEST TEXAS TONIGHT AND MOVE EASTWARD INTO THE TEXAS HILL COUNTRY. COUNTIES IN THE WATCH AREA MAY HAVE THE DEVELOPMENT OF HAIL UP TO TWO INCHES IN DIAMETER...STRONG THUNDERSTORM WIND GUSTS TO 60 MPH AND DANGEROUS LIGHTNING. ADDITIONAL SHOWER AND THUNDERSTORM DEVELOPMENT IS ALSO EXPECTED MONDAY MORNING AREAWIDE THEN BECOMING PARTLY CLOUDY MONDAY AFTERNOON. 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.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 9, 11:58 PM CDT | Severe Thunderstorm Warning | EWX | Edwards | 62 min |
| May 10, 12:18 AM CDT | Tornado Warning | EWX | Edwards | 62 min |
| May 10, 12:25 AM CDT | Flash Flood Warning | EWX | Edwards | 3 hr |
| May 10, 12:56 AM CDT | Severe Thunderstorm Warning | EWX | Burnet, Llano | 59 min |
| May 10, 1:08 AM CDT | Severe Thunderstorm Warning | EWX | Edwards | 62 min |
| May 10, 10:02 AM CDT | Severe Thunderstorm Warning | EWX | Williamson | 58 min |
| May 10, 11:01 AM CDT | Severe Thunderstorm Warning | EWX | Williamson | 59 min |
| May 10, 1:37 PM CDT | Flash Flood Warning | EWX | Burnet, Llano | 3 hr |
| May 10, 2:08 PM CDT | Flash Flood Warning | EWX | Williamson | 2 hr |
| May 10, 2:40 PM CDT | Severe Thunderstorm Warning | EWX | Travis, Williamson | 65 min |
| May 10, 3:49 PM CDT | Severe Thunderstorm Warning | EWX | Lee | 56 min |
| May 10, 4:50 PM CDT | Flash Flood Warning | EWX | Williamson | 3 hr |
| May 10, 5:05 PM CDT | Severe Thunderstorm Warning | EWX | Travis, Williamson | 45 min |
| May 10, 6:57 PM CDT | Severe Thunderstorm Warning | EWX | Caldwell, Gonzales, Guadalupe | 48 min |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.