Alert archive / Texas / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 68, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Feb 21, 1998, 2:59 PM CST for Frio County, Texas. It was in force for 31 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
- Feb 21, 1998, 2:59 PM CST (20:59 UTC)
- Expired
- Feb 21, 1998, 3:30 PM CST
- In force
- 31 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Frio County, TX
The radar
The Laughlin AFB radar (KDFX), 122 km from the middle of the area, began a volume at 21:00 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 |
|---|---|---|---|
| Feb 21, 3:15 PM CST | Hail 0.75 | Moore, 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
Del Rio, TX (KDRT), launched 12:00Z, 9.0 hours before the alert went out and 177 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 555 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
664 WUUS1 KSAT 212102 RRA SVRSAT TXC163-212130- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 259 PM CST SAT FEB 21 1998 THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 330 PM CST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH CENTRAL TEXAS ...FRIO COUNTY AT 3 PM...NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES SOUTHWEST OF MOORE MOVING NORTHEAST ALONG INTERSTATE 35. ANOTHER SEVERE THUNDERSTORM WAS 5 MILES WEST OF PEARSALL ALSO MOVING NORTHEAST ALONG I-35. RADAR INDICATED BOTH STORMS WERE PRODUCING 3/4 INCH HAIL. MOVEMENT WAS NORTHEAST AT 40 MPH. ALTHOUGH NO TORNADOES HAVE BEEN DETECTED WITH THIS STORM...A TORNADO WATCH REMAINS IN EFFECT. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING SO BE ON THE LOOKOUT.
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, Feb 21, 12:00 PM CST, 2 hours 59 minutes before
TXZ171>173-183>194-202>209-217>225-228-220000- HAZARDOUS WEATHER OUTLOOK...UPDATE NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1200 PM CST SAT FEB 21 1998 ...A FLASH FLOOD WATCH IS IN EFFECT FOR ALL OF SOUTH TEXAS THIS AFTERNOON AND TONIGHT... A VIGOROUS AND DANGEROUS STORM SYSTEM IS CURRENTLY LOCATED OVER WEST TEXAS...MOVING EASTWARD INTO THE TEXAS HILL COUNTRY AND SOUTH CENTRAL TEXAS. THUNDERSTORMS ARE FORECASTED FOR THIS AFTERNOON AND TONIGHT OVER ALL OF SOUTH TEXAS WITH A HIGH RISK OF SEVERE THUNDERSTORMS ALONG WITH LARGE HAIL...DAMAGING WINDS...FREQUENT DEADLY LIGHTNING... LOCALLY HEAVY RAINFALL...AND POSSIBLE FLASH FLOODING. THE THREAT OF TORNADIC DEVELOPMENT ALSO EXISTS. A FLASH FLOOD WATCH IS IN EFFECT FOR ALL OF SOUTH TEXAS...SOUTH OF A LINE THAT RUNS FROM DEL RIO TO JUNCTION TO LLANO TO COLLEGE STATION TO LUFKIN TO NEWTON. THIS WATCH MEANS THAT FLOODING IS POSSIBLE WITHIN THE WATCH AREA DUE TO THE HEAVY RAINS THAT WILL OCCUR WITH THE THUNDERSTORMS. HEAVY RAINS WILL CAUSE THE RAPID RISE OF STREAMS AND RIVERS...FLOODING OF LOW LYING AREA...ROADS...AND LOW WATER CROSSINGS. THIS IS A POTENTIALLY DANGEROUS WEATHER SITUATION. RESIDENTS AND EMERGENCY MANAGEMENT OFFICIALS IN SOUTH TEXAS ARE URGED TO MONITOR FORECASTS AND ADVISORIES ISSUED BY NATIONAL WEATHER SERVICE OFFICES. THESE BULLETINS WILL BE BROADCAST OVER LOCAL RADIO AND TV STATIONS, CABLE TV OUTLETS AND NOAA WEATHER RADIO STATIONS. LISTEN FOR THESE BROADCASTS...AND HEED THEIR ADVICE. NEARBY HAZARDOUS WEATHER OUTLOOKS INCLUDE: FOR SOUTHWEST TEXAS...FROM MIDLAND...LBBSPSMAF FOR THE CONCHO VALLEY...FROM SAN ANGELO...LBBSPSSJT FOR NORTH TEXAS...FROM FORT WORTH...FTWSPSFTW FOR SOUTHEAST TEXAS...FROM HOUSTON/GALVESTON...SATSPSHOU FOR COASTAL BEND/RIO GRANDE PLAINS...FROM CORPUS CHRISTI...SATSPSCRP. THE HAZARDOUS WEATHER OUTLOOK NORMALLY WILL BE UPDATED BY MEANS OF THE ZONE FORECASTS, SHORT TERM FORECASTS, 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. ADDITIONAL WEATHER INFORMATION IS AVAILABLE ON THE NATIONAL WEATHER SERVICE CENTRAL AND SOUTH CENTRAL TEXAS HOME PAGE OF THE INTERNET WORLD WIDE WEB AT: www.srh.noaa.gov/ewx, OR TUNE TO THE CLOSEST NOAA WEATHER RADIO STATION OPERATING ON A FREQUENCY BETWEEN 162.400 MHz AND 162.550 MHz.
Special weather statement, Feb 21, 12:00 PM CST, 2 hours 59 minutes before
TXZ171>173-183>194-202>209-217>225-228-220000- HAZARDOUS WEATHER OUTLOOK...UPDATE NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1200 PM CST SAT FEB 21 1998 ...A FLASH FLOOD WATCH IS IN EFFECT FOR ALL OF SOUTH TEXAS THIS AFTERNOON AND TONIGHT... A VIGOROUS AND DANGEROUS STORM SYSTEM IS CURRENTLY LOCATED OVER WEST TEXAS...MOVING EASTWARD INTO THE TEXAS HILL COUNTRY AND SOUTH CENTRAL TEXAS. THUNDERSTORMS ARE FORECASTED FOR THIS AFTERNOON AND TONIGHT OVER ALL OF SOUTH TEXAS WITH A HIGH RISK OF SEVERE THUNDERSTORMS ALONG WITH LARGE HAIL...DAMAGING WINDS...FREQUENT DEADLY LIGHTNING... LOCALLY HEAVY RAINFALL...AND POSSIBLE FLASH FLOODING. THE THREAT OF TORNADIC DEVELOPMENT ALSO EXISTS. A FLASH FLOOD WATCH IS IN EFFECT FOR ALL OF SOUTH TEXAS...SOUTH OF A LINE THAT RUNS FROM DEL RIO TO JUNCTION TO LLANO TO COLLEGE STATION TO LUFKIN TO NEWTON. THIS WATCH MEANS THAT FLOODING IS POSSIBLE WITHIN THE WATCH AREA DUE TO THE HEAVY RAINS THAT WILL OCCUR WITH THE THUNDERSTORMS. HEAVY RAINS WILL CAUSE THE RAPID RISE OF STREAMS AND RIVERS...FLOODING OF LOW LYING AREA...ROADS...AND LOW WATER CROSSINGS. THIS IS A POTENTIALLY DANGEROUS WEATHER SITUATION. RESIDENTS AND EMERGENCY MANAGEMENT OFFICIALS IN SOUTH TEXAS ARE URGED TO MONITOR FORECASTS AND ADVISORIES ISSUED BY NATIONAL WEATHER SERVICE OFFICES. THESE BULLETINS WILL BE BROADCAST OVER LOCAL RADIO AND TV STATIONS, CABLE TV OUTLETS AND NOAA WEATHER RADIO STATIONS. LISTEN FOR THESE BROADCASTS...AND HEED THEIR ADVICE. NEARBY HAZARDOUS WEATHER OUTLOOKS INCLUDE: FOR SOUTHWEST TEXAS...FROM MIDLAND...LBBSPSMAF FOR THE CONCHO VALLEY...FROM SAN ANGELO...LBBSPSSJT FOR NORTH TEXAS...FROM FORT WORTH...FTWSPSFTW FOR SOUTHEAST TEXAS...FROM HOUSTON/GALVESTON...SATSPSHOU FOR COASTAL BEND/RIO GRANDE PLAINS...FROM CORPUS CHRISTI...SATSPSCRP. THE HAZARDOUS WEATHER OUTLOOK NORMALLY WILL BE UPDATED BY MEANS OF THE ZONE FORECASTS, SHORT TERM FORECASTS, 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. ADDITIONAL WEATHER INFORMATION IS AVAILABLE ON THE NATIONAL WEATHER SERVICE CENTRAL AND SOUTH CENTRAL TEXAS HOME PAGE OF THE INTERNET WORLD WIDE WEB AT: www.srh.noaa.gov/ewx, OR TUNE TO THE CLOSEST NOAA WEATHER RADIO STATION OPERATING ON A FREQUENCY BETWEEN 162.400 MHz AND 162.550 MHz.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 21, 3:04 PM CST | Severe Thunderstorm Warning | EWX | Frio | 56 min |
| Feb 21, 3:40 PM CST | Flash Flood Warning | EWX | Frio, Medina | 3 hr |
| Feb 21, 3:55 PM CST | Flash Flood Warning | EWX | Atascosa, Bexar | 3 hr |
| Feb 21, 3:55 PM CST | Flash Flood Warning | EWX | Kendall | 3 hr |
| Feb 21, 4:19 PM CST | Severe Thunderstorm Warning | EWX | Atascosa, Bexar | 56 min |
| Feb 21, 4:37 PM CST | Flash Flood Warning | EWX | Guadalupe, Wilson | 2 hr |
| Feb 21, 4:37 PM CST | Severe Thunderstorm Warning | EWX | Guadalupe, Wilson | 2 hr |
| Feb 21, 4:39 PM CST | Flash Flood Warning | EWX | Comal | 3 hr |
| Feb 21, 5:08 PM CST | Severe Thunderstorm Warning | EWX | Comal | 67 min |
| Feb 21, 5:28 PM CST | Flash Flood Warning | EWX | Gonzales | 2 hr |
| Feb 21, 5:28 PM CST | Severe Thunderstorm Warning | EWX | Gonzales | 2 hr |
| Feb 21, 5:33 PM CST | Flash Flood Warning | EWX | Hays | 57 min |
| Feb 21, 5:33 PM CST | Severe Thunderstorm Warning | EWX | Hays | 57 min |
| Feb 21, 5:47 PM CST | Flash Flood Warning | EWX | Caldwell, Travis | 118 min |
Nearby
Severe Thunderstorm Warnings in Texas, 1998Every severe thunderstorm warning in 1998
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.