Alert archive / Texas / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 128, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 12, 2000, 6:27 PM CDT for Llano County, Texas. It was in force for 63 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
- May 12, 2000, 6:27 PM CDT (23:27 UTC)
- Expired
- May 12, 2000, 7:30 PM CDT
- In force
- 63 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Llano County, TX
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 12, 6:40 PM CDT | Hail 0.88 | Llano, TX | |
| May 12, 7:07 PM CDT | Hail 1.75 | Llano, 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 12, 6:15 PM CDT | Tornado Watch | SPC | 4 hr |
The nearest sounding before it
Del Rio, TX (KDRT), launched 12:00Z, 11.5 hours before the alert went out and 254 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
- 2090 J/kg
- Mixed-layer CIN
- -527 J/kg
- Mixed-layer LCL
- 1549 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 236 m²/s²
- 0-3 km storm-relative helicity
- 253 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KEWX 122328 SVRSAT TXC299-130030- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 627 PM CDT FRI MAY 12 2000 THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING COUNTIES IN TEXAS... LLANO COUNTY * UNTIL 730 PM CDT * AT 627 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 15 MILES NORTHWEST OF LLANO...MOVING EAST AT 25 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... LLANO AROUND 700 PM CDT VERY LARGE HAIL IS POSSIBLE WITH THIS SEVERE THUNDERSTORM. IF YOU ARE IN THE PATH OF THE STORM...PUT YOUR CAR IN A GARAGE AND MOVE TO A SUBSTANTIAL SHELTER. A TORNADO WATCH IS IN EFFECT. SEVERE THUNDERSTORMS CAN AND DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED. LAT...LON 3090 9895 3054 9894 3053 9844 3092 9847
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.
NWS Austin/San Antonio, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at May 12, 2:45 PM CDT, 3 hours 42 minutes earlier.
Area forecast discussion, May 12, 2:45 PM CDT, 3 hours 42 minutes before
SOUTH CENTRAL TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 245 PM CDT FRI MAY 12 2000 MOST OF THE MODEL RUNS HAVE BEEN FAIRLY CONSISTENT IN BRINGING THE COLD FRONT WHICH IS IN WEST CENTRAL TEXAS SOUTHWARD ACROSS THE AREA AND DEVELOPING PRECIPITATION WITH THE FRONT BEGINNING EITHER LATE THIS AFTERNOON OR THIS EVENING. WILL KEEP THAT TREND IN CURRENT FORECAST AND POSSIBLY RAISE POPS IN SOME AREAS. INCREASING MIDDLE CLOUDS OVER SOUTHWEST TEXAS INDICATES SOME LIFTING OCCURRING AS UPPER TROUGH COMES CLOSER. STEEP LAPSE RATE ABOVE CAP SO ANY THUNDERSTORMS COULD BECOME QUITE STRONG. LOW-LEVEL MOISTURE IS FAIRLY LIMITED ESPECIALLY WEST BUT MAIN TRAJECTORIES BEHIND THE FRONT LATER TONIGHT AND SATURDAY WILL BE FROM THE EAST WHERE MOISTURE IS BETTER. COOLER TEMPERATURES ON TAP FOR AREA BEHIND THE COLD FRONT AIDED BY MOSTLY CLOUDY CONDITIONS. COOLER AIR WILL BE DEEPER BUT BEGINNING TO SLIP TO THE EAST ON SUNDAY AS RAIN THREATS BEGIN TO DECREASE. A WARMER AND DRIER PATTERN WILL SET BACK IN MONDAY THROUGH WEDNESDAY AS AN UPPER RIDGE IS REESTABLISHED OVER THE AREA. PRELIMINARY NUMBERS AUS 68/80/60/80 4632 SAT 71/82/63/81 35g32 DRT 72/83/65/82 2321 .EWX...NONE. 16/06/20
In the hours before
Special weather statement, May 12, 2:52 PM CDT, 3 hours 35 minutes before
TXZ171>173-183>194-202>209-217>225-228-122349- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 252 PM CDT FRI MAY 12 2000 THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TONIGHT FOR THE HILL COUNTRY AND ADJACENT AREAS OF SOUTH CENTRAL TEXAS. THIS INCLUDES THE METROPOLITAN AREAS OF AUSTIN AND SAN ANTONIO. LARGE HAIL AND DAMAGING WIND GUSTS WILL BE THE PRIMARY THREAT. A DRY LINE IS MOVING SLOWLY EAST INTO THE HILL COUNTRY. AS IT ENCOUNTERS THE HOT AND VERY INSTABLE AIR...THUNDERSTORMS WILL RAPIDLY DEVELOP. A COLD FRONT MOVING SOUTHEAST TOWARD THE HILL COUNTRY THIS EVENING AND AN UPPER LEVEL DISTURBANCE WILL KEEP THE SHOWER AND THUNDERSTORMS PRODUCTION GOING THROUGH THE NIGHT. LOCALLY HEAVY RAINFALL IS POSSIBLE WHERE SHOWERS AND THUNDERSTORMS TRAVERSE THE SAME AREA. EMERGENCY MANAGEMENT AND STORM SPOTTER GROUPS ARE ADVISED TO MONITOR THE LATEST WEATHER DEVELOPMENTS THROUGHOUT THE DAY. SPOTTER ACTIVATION MAY BE REQUIRED LATER THIS EVENING. FOR INFORMATION ON WEATHER THREATS IN SURROUNDING AREAS...REFER TO OUTLOOKS FROM 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 12, 6:39 PM CDT | Tornado Warning | EWX | Llano | 51 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2000Every severe thunderstorm warning in 2000
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.