Alert archive / Texas / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 73, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 2, 1999, 4:46 PM CDT for Lavaca County, Texas. It was in force for 59 min. 1 report 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
- May 2, 1999, 4:46 PM CDT (21:46 UTC)
- Expired
- May 2, 1999, 5:45 PM CDT
- In force
- 59 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Lavaca County, TX
The radar
The Austin/San Antonio radar (KEWX), 112 km from the middle of the area, began a volume at 21:48 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 |
|---|---|---|---|
| May 2, 5:00 PM CDT | Hail 0.75 | Yoakum, 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 12:00Z, 9.8 hours before the alert went out and 188 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
- 566 J/kg
- Mixed-layer CIN
- -100 J/kg
- Mixed-layer LCL
- 613 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 164 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 3.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSAT 022146 RRA SVRSAT TXC285-022245- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 446 PM CDT SUN MAY 2 1999 THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... LAVACA COUNTY IN TEXAS * UNTIL 545 PM CDT * AT 445 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 7 MILES SOUTHWEST OF YOAKUM... MOVING NORTHEAST AT d30 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... YOAKUM AT 555 PM CDT SHINER AT 600 PM CDT DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS! MO
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 2, 11:10 AM CDT, 5 hours 36 minutes before
TXZ171>173-183>194-202>209-217>225-228-022300- HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1110 AM CDT SUN MAY 2 1999 AN UPPER LEVEL DISTURBANCE COMBINED WITH ABUNDANT LOW LEVEL MOISTURE WILL PRODUCE A THREAT OF STRONG THUNDERSTORMS ACROSS THE TEXAS HILL COUNTRY AND SOUTH CENTRAL TEXAS THIS AFTERNOON AND THIS EVENING. ALTHOUGH INSTABILITY AND VERTICAL WIND SHEAR WILL BE SUFFICIENT FOR THE DEVELOPMENT OF SEVERE THUNDERSTORMS, THE LACK OF ENOUGH DAYTIME HEATING WILL LIKELY PREVENT THESE THUNDERSTORMS FROM REACHING SEVERE LEVELS. A FEW STRONG STORMS COULD PRODUCE VERY HEAVY RAINFALL, SMALL HAIL AND WIND GUSTS UP TO 50 MPH. RAINFALL TOTALS FROM SCATTERED SHOWERS AND THUNDERSTORMS THIS AFTERNOON AND THIS EVENING WILL AVERAGE ONE QUARTER TO ONE HALF INCH WITH ISOLATED ONE INCH AMOUNTS POSSIBLE. NO OTHER HAZARDOUS WEATHER CONDITIONS ARE EXPECTED ACROSS THE HILL COUNTRY OR SOUTH CENTRAL TEXAS THROUGH TONIGHT. 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 2, 4:45 PM CDT, 1 minute before
TXZ171>173-183>194-202>209-217>225-228-031200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 445 PM CDT SUN MAY 2 1999 WIDELY SCATTERED SHOWERS OR THUNDERSTORMS WILL CONTINUE THROUGH THE EVENING HOURS AND REDEVELOP AGAIN DURING THE DAY MONDAY. RAINFALL AMOUNTS WILL AVERAGE BETWEEN A QUARTER OF AN INCH AND HALF AN INCH WITH HIGHER TOTALS IN EXCESS OF AN INCH POSSIBLE IN THE HEAVIER STORMS. OTHERWISE...NO HAZARDOUS WEATHER IS EXPECTED TONIGHT OR MONDAY ACROSS SOUTH CENTRAL TEXAS AND THE TEXAS HILL COUNTRY. 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 2, 4:27 PM CDT | Severe Thunderstorm Warning | EWX | DeWitt | 63 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.