Alert archive / Texas / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 4, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Jan 6, 1998, 11:02 AM CST for Frio County, Texas. It was in force for 43 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
- Jan 6, 1998, 11:02 AM CST (17:02 UTC)
- Expired
- Jan 6, 1998, 11:45 AM CST
- In force
- 43 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Frio County, TX
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jan 6, 11:30 AM CST | Hail 0.88 | Derby, 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, 5.0 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
- 1357 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 514 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 156 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.3
The text
As transmitted, in the capitals the NWS used until 2016.
518 WUUS1 KSAT 061703 RRA SVRSAT TXC163-061745- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1102 AM CST TUE JAN 6 1998 THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1145 AM CST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH CENTRAL TEXAS ...FRIO COUNTY AT 11:00 AM...RADAR INDICATED A SEVERE THUNDERSTORM NEAR DERBY MOVING NORTH AT 20 MPH. PEOPLE IN THE PATH OF THIS STORM SHOULD BE ALERT TO THE POSSIBILITY OF LARGE HAIL AND DAMAGING WINDS. FREQUENT LIGHTNING AND LOCALLY HEAVY RAIN CAN ALSO OCCUR WITH SEVERE THUNDERSTORMS...FLOODING SMALL STREAMS...LOW AREAS...AND LOW WATER CROSSINGS.
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, Jan 6, 5:30 AM CST, 5 hours 32 minutes before
TXZ171>173-183>194-202>209-217>225-228-070000- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 530 AM CST TUE JAN 6 1998 A FLASH FLOOD WATCH IS IN EFFECT FOR SOUTH CENTRAL TEXAS AND THE TEXAS HILL COUNTRY FOR TODAY AND TONIGHT. AN APPROACHING UPPER-LEVEL TROUGH OF LOW PRESSURE FROM THE WEST... COUPLED WITH ABUNDANT LOW-LEVEL MOISTURE FROM THE GULF...WILL COMBINE TO PRODUCE WIDESPREAD SHOWERS AND THUNDERSTORMS TODAY AND TONIGHT ACROSS MUCH OF SOUTH CENTRAL TEXAS...THE TEXAS HILL COUNTRY AND EASTWARD INTO SOUTHEAST TEXAS AND BEYOND. SOME OF THESE STORMS COULD APPROACH SEVERE CRITERIA...ESPECIALLY IN SOUTHEAST TEXAS... BUT THE MAIN THREAT WILL LIKELY COME FROM LOCALLY HEAVY RAINFALL AND FLASH FLOODING. RAINFALL TOTALS TODAY AND TONIGHT WILL AVERAGE BETWEEN HALF AN INCH AND AN INCH IN SOUTH CENTRAL TEXAS AND THE HILL COUNTRY...WITH SOME ISOLATED TOTALS BETWEEN 2 AND 4 INCHES POSSIBLE. FARTHER EAST IN SOUTHEAST TEXAS...RAINFALL TOTALS COULD APPROACH 5 INCHES OR MORE BEFORE THE RAINS TAPER OFF WEDNESDAY AND WEDNESDAY NIGHT. AN APPROACHING COLD FRONT WILL ALSO AID IN TRIGGERING CONVECTION TODAY AND TONIGHT AND USHER IN MUCH COOLER AIR AS WELL. 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 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.
Special weather statement, Jan 6, 5:30 AM CST, 5 hours 32 minutes before
TXZ171>173-183>194-202>209-217>225-228-070000- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 530 AM CST TUE JAN 6 1998 A FLASH FLOOD WATCH IS IN EFFECT FOR SOUTH CENTRAL TEXAS AND THE TEXAS HILL COUNTRY FOR TODAY AND TONIGHT. AN APPROACHING UPPER-LEVEL TROUGH OF LOW PRESSURE FROM THE WEST... COUPLED WITH ABUNDANT LOW-LEVEL MOISTURE FROM THE GULF...WILL COMBINE TO PRODUCE WIDESPREAD SHOWERS AND THUNDERSTORMS TODAY AND TONIGHT ACROSS MUCH OF SOUTH CENTRAL TEXAS...THE TEXAS HILL COUNTRY AND EASTWARD INTO SOUTHEAST TEXAS AND BEYOND. SOME OF THESE STORMS COULD APPROACH SEVERE CRITERIA...ESPECIALLY IN SOUTHEAST TEXAS... BUT THE MAIN THREAT WILL LIKELY COME FROM LOCALLY HEAVY RAINFALL AND FLASH FLOODING. RAINFALL TOTALS TODAY AND TONIGHT WILL AVERAGE BETWEEN HALF AN INCH AND AN INCH IN SOUTH CENTRAL TEXAS AND THE HILL COUNTRY...WITH SOME ISOLATED TOTALS BETWEEN 2 AND 4 INCHES POSSIBLE. FARTHER EAST IN SOUTHEAST TEXAS...RAINFALL TOTALS COULD APPROACH 5 INCHES OR MORE BEFORE THE RAINS TAPER OFF WEDNESDAY AND WEDNESDAY NIGHT. AN APPROACHING COLD FRONT WILL ALSO AID IN TRIGGERING CONVECTION TODAY AND TONIGHT AND USHER IN MUCH COOLER AIR AS WELL. 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 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.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 5, 10:40 PM CST | Severe Thunderstorm Warning | EWX | Burnet | 50 min |
| Jan 6, 6:56 AM CST | Flash Flood Warning | EWX | Bandera, Gillespie, Kerr | 5 hr |
| Jan 6, 8:11 AM CST | Flash Flood Warning | EWX | Llano | 4 hr |
| Jan 6, 8:45 AM CST | Severe Thunderstorm Warning | EWX | Gillespie | 60 min |
| Jan 6, 9:52 AM CST | Severe Thunderstorm Warning | EWX | Williamson | 68 min |
| Jan 6, 11:51 AM CST | Flash Flood Warning | EWX | Frio | 69 min |
| Jan 6, 11:51 AM CST | Severe Thunderstorm Warning | EWX | Frio | 69 min |
| Jan 6, 12:17 PM CST | Flash Flood Warning | EWX | Medina | 3 hr |
| Jan 6, 12:41 PM CST | Flash Flood Warning | EWX | Bexar | 2 hr |
| Jan 6, 12:55 PM CST | Flash Flood Warning | EWX | Frio | 2 hr |
| Jan 6, 1:31 PM CST | Severe Thunderstorm Warning | EWX | Atascosa | 59 min |
| Jan 6, 2:08 PM CST | Flash Flood Warning | EWX | Atascosa | 2 hr |
| Jan 6, 2:32 PM CST | Flash Flood Warning | EWX | Bexar, Comal | 118 min |
| Jan 6, 4:13 PM CST | Flash Flood Warning | EWX | DeWitt, Gonzales, Lavaca | 3 hr |
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.