Alert archive / Texas / Severe Thunderstorm Warnings in 2003
Severe Thunderstorm Warning 48, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 1, 2003, 7:18 PM CDT for Gillespie County, Llano County, Texas. It was in force for 72 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 1, 2003, 7:18 PM CDT (00:18 UTC)
- Expired
- May 1, 2003, 8:30 PM CDT
- In force
- 72 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Counties, with a storm outline in the text
Counties Gillespie County, TX, Llano County, TX
The radar
The Austin/San Antonio radar (KEWX), 130 km from the middle of the area, began a volume at 00:21 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.
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 nearest sounding before it
Del Rio, TX (KDRT), launched 00:00Z, 0.3 hours before the alert went out and 221 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
- 2571 J/kg
- Mixed-layer CIN
- -75 J/kg
- Mixed-layer LCL
- 1701 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- -28 m²/s²
- 0-3 km storm-relative helicity
- 11 m²/s²
- Significant tornado parameter
- -0.1
- Supercell composite
- -1.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KEWX 020018 SVRSAT TXC171-299-020115- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 713 PM CDT THU MAY 1 2003 THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING COUNTIES IN TEXAS... LLANO GILLESPIE * UNTIL 830 PM CDT * AT 713 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 6 MILES SOUTHEAST OF MASON MOVING SOUTHEAST AT 10 MPH. NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING VERY HEAVY RAIN...LARGE HAIL...AND STRONG DAMAGING WINDS IN EXCESS OF 60 MPH OR GREATER. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. LAT...LON 3080 9924 3019 9918 3017 9862 3072 9860 $$
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 1, 7:00 PM CDT, 18 minutes earlier.
Area forecast discussion, May 1, 7:00 PM CDT, 18 minutes before
SOUTH CENTRAL TEXAS FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 700 PM CDT THU MAY 1 2003 UPDATED FORECAST TO INCREASE POPS THIS EVENING ACROSS NORTHERN HILL COUNTRY BASED ON CURRENT RADAR TRENDS. ALSO PUT IN POPS FOR FRIDAY AFTERNOON AND EVENING BASED ON LATEST MESOETA SOLUTION AND POSSIBLE LEFT-OVER BOUNDARIES FROM REAL-TIME CONVECTION. OTHERWISE...NO MAJOR CHANGES. 11/01/23 .EWX...TORNADO WATCH UNTIL 8PM CDT NORTHERN HILL COUNTRY. PREVIOUS DISCUSSION... GOOD MOIST GULF FLOW QUITE UNSTABLE BUT SIGNIFICANT CAP MAINTAINING RAINLESS CONDITIONS. GRAVITY WAVE HELPED SPARK AREA OF THUNDERSTORMS WHICH SKIRTED NORTHERN BOUNDARY OF CWA AROUND NOON TIME. ANOTHER IMPULSE MOVING SOUTH TONIGHT MAY TRIGGER SOME THUNDER NORTH CENTRAL ZONES. EXPECT REGIME OF OVERNIGHT CLOUDS AND SOME DRIZZLE ALONG THE ESCARPMENT TONIGHT AND FRIDAY NIGHT...GIVING WAY TO SOME SUN IN THE AFTERNOONS. QUITE WARM TO HOT WEST FRIDAY AND ON DERBY DAY. A TAD COOLER STARTING SUNDAY AS WEAK COLD FRONT MOVES IN. LOW POPS SUNDAY THROUGH TUESDAY AS FRONT LINGERS OVER REGION. 3/6 PRELIMINARY NUMBERS... AUS 67/92/68/92 2000 SAT 70/94/70/94 0000 DRT 71/99/70/99 0000
Hazardous weather outlook, May 1, 5:55 AM CDT, 13 hours 23 minutes before
TXZ171>173-183>194-202>209-217>225-228-021100- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 555 AM CDT THU MAY 1 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS. .DAY ONE...TODAY THERE IS A SLIGHT CHANCE OF THUNDERSTORMS OVER SOUTHEASTERN SECTIONS OF SOUTH CENTRAL TEXAS. OTHERWISE...NO HAZARDOUS WEATHER IS EXPECTED TODAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED. .DAYS TWO THROUGH SEVEN... THERE IS A SLIGHT CHANCE OF THUNDERSTORMS SUNDAY THROUGH TUESDAY. OTHERWISE...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 1, 7:23 PM CDT | Severe Thunderstorm Warning | EWX | Gillespie, Llano | 67 min |
| May 1, 9:09 PM CDT | Severe Thunderstorm Warning | EWX | Kerr | 51 min |
| May 2, 6:26 PM CDT | Severe Thunderstorm Warning | EWX | Llano | 64 min |
| May 2, 6:33 PM CDT | Severe Thunderstorm Warning | EWX | Llano | 57 min |
| May 2, 6:49 PM CDT | Tornado Warning | EWX | Llano | 41 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2003Every severe thunderstorm warning in 2003
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.