Alert archive / Texas / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 60, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 9, 2002, 9:35 PM CDT for Val Verde County, Texas. It was in force for 55 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 9, 2002, 9:35 PM CDT (02:35 UTC)
- Expired
- May 9, 2002, 10:30 PM CDT
- In force
- 55 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Counties, with a storm outline in the text
County Val Verde County, TX
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
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, 8:15 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Del Rio, TX (KDRT), launched 00:00Z, 2.6 hours before the alert went out and 45 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
- 3638 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 1636 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 153 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 7.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KEWX 100235 SVRSAT TXC465-100330- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 934 PM CDT THU MAY 9 2002 THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS EXTENDED A * SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING COUNTIES IN TEXAS... VAL VERDE * UNTIL 1030 PM CDT * AT 934 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER VAL VERDE COUNTY...OR ABOUT 23 MILES NORTHWEST OF DEL RIO...MOVING NORTHEAST AT 10 MPH. * THE SEVERE THUNDERSTORM WILL BE... NEAR COMSTOCK AT 950 PM IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE THUNDERSTORM 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 AND DITCHES. AVOID THESE AREAS. WATER LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE. LAT...LON 2964 10125 2953 10108 2980 10078 2997 10103
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 9, 8:15 PM CDT, 1 hour 20 minutes earlier.
Area forecast discussion, May 9, 8:15 PM CDT, 1 hour 20 minutes before
SOUTH CENTRAL TEXAS FORECAST DISCUSSION UPDATED NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 815 PM CDT THU MAY 9TH 2002 SYNOPSIS...HIGHLY VOLATILE ATMOSPHERE IS IN PLACE ACROSS PORTIONS OF THE COUNTY WARNING AREA.LATEST SOUNDING OUT OF DEL RIO SHOWS A DEFINITIVE VEERING WIND TO 700 MB, TRAPPING DEEP MOISTURE IN THE LOWER LEVELS OF THE ATMOSPHERE. IT APPEARS DEL RIO HAS REACHED CONVECTIVE TEMP OF 94, HENCE, STORM DEVELOPMENT. CURRENT INFRARED/WATER VAPOR ANALYSIS PINPOINTS A STATIONARY FRONT LOCATED FROM PANDALE EAST TO BURNET AND TO THE NORTHWEST OF AUSTIN. THIS SURFACE FRONT IS CREATING A BATTLE ZONE BETWEEN WARM MOIST AIR TO THE SOUTH AND COOL DRY AIR TO THE NORTH. AN UPPER LEVEL SHORTWAVE CONTINUES ITS PROGRESSION OFF TO THE EAST. THE COMBINATION OF VORTICITY ADVECTION ALOFT AND ISENTROPIC LIFT AT THE SURFACE WILL TOUCH OFF SCATTERED THUNDERSTORMS TONIGHT. SOME OF THESE STORMS WILL REACH SEVERE CRITERIA. CURRENT RADAR SHOWS ACTION FIRING AHEAD OF THE SHORTWAVE OVER VAL VERDE AND EDWARDS COUNTIES MOVING OFF TO THE EAST. CURRENT OVERLAY OF CONVECTIVE ENERGY/CONVECTIVE INHIBITION SHOWS MOST UNSTABLE THREAT TO BE ACROSS DEL RIO, EAGLE PASS, HILL COUNTRY AND PORTIONS OF SOUTH CENTRAL TEXAS INTO TONIGHT. WITH THERMAL HEATING WINDING DOWN, WELL LIGHTEN POPS SLIGHTLY FOR THE OVERNIGHT...BUT KEEP IN POSSIBLY SEVERE FOR SURE. 23/02/06
In the hours before
Special weather statement, May 9, 9:25 PM CDT, 10 minutes before
TXZ171-183>189-100700- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 925 PM CDT THU MAY 9 2002 A SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT TIL 2 AM CDT... THE WATCH COVERS THE FOLLOWING 11 COUNTIES OF SOUTH CENTRAL TEXAS...INCLUDING THE TEXAS HILL COUNTRY... BANDERA EDWARDS GILLESPIE KENDALL KERR KIMBLE LLANO MASON MENARD REAL VAL VERDE AN UPPER LEVEL DISTURBANCE WAS MOVING EAST ACROSS THE AREA THIS EVENING...INTERACTING WITH A STATIONARY COLD FRONT LYING OVER THE NORTHERN FRINGES OF THE HILL COUNTRY AND A THERMAL LOW NEAR DEL RIO. THE DISTURBANCE AND ITS INTERACTIONS WILL CONTINUE TO PRODUCE SHOWERS AND THUNDERSTORMS...SOME SEVERE...DURING THE REMAINDER OF THE EVENING...WEAKENING EARLY TOMORROW MORNING AS THERMAL PROCESSES SUBSIDE.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 9, 7:37 PM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 53 min |
| May 9, 7:57 PM CDT | Severe Thunderstorm Warning | EWX | Edwards | 63 min |
| May 9, 8:24 PM CDT | Severe Thunderstorm Warning | EWX | Edwards | 36 min |
| May 9, 8:27 PM CDT | Severe Thunderstorm Warning | EWX | Edwards | 33 min |
| May 9, 8:28 PM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 62 min |
| May 9, 9:22 PM CDT | Severe Thunderstorm Warning | EWX | Edwards | 53 min |
| May 9, 10:38 PM CDT | Severe Thunderstorm Warning | EWX | Edwards, Kinney, Val Verde | 52 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2002Every severe thunderstorm warning in 2002
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.