Alert archive / Texas / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 71, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 26, 1999, 10:54 AM CDT for Karnes County, Texas. It was in force for 56 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Apr 26, 1999, 10:54 AM CDT (15:54 UTC)
- Expired
- Apr 26, 1999, 11:50 AM CDT
- In force
- 56 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Karnes County, TX
The radar
The Austin/San Antonio radar (KEWX), 90 km from the middle of the area, began a volume at 15:53 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.
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 12:00Z, 3.9 hours before the alert went out and 140 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
- 1709 J/kg
- Mixed-layer CIN
- -132 J/kg
- Mixed-layer LCL
- 693 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 117 m²/s²
- 0-3 km storm-relative helicity
- 174 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 4.9
The text
As transmitted, in the capitals the NWS used until 2016.
999 WUUS1 KSAT 261553 RRA SVRSAT TXC255-261650- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1054 AM CDT MON APR 26 1999 THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... KARNES COUNTY IN TEXAS * UNTIL 1150 AM CDT * AT 1048 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 15 MILES WEST OF KARNES CITY... MOVING EAST AT 35 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... HOBSON AT 1105 AM CDT KARNES CITY AT 1105 AM CDT HELANA AT 1125 AM CDT DAMAGING WINDS...LARGE HAIL...AND HEAVY RAIN ARE LIKELY. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS PASHOS
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, Apr 26, 5:47 AM CDT, 5 hours 7 minutes before
TXZ171>173-183>194-202>209-217>225-228-262201- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 547 AM CDT MON APR 26 1999 THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS MORNING. A LINE OF STRONG TO SEVERE THUNDERSTORMS HAS DEVELOPED ALONG AND JUST AHEAD OF A COLD FRONTAL BOUNDARY. THE STORMS ARE CAPABLE OF PRODUCING LARGE HAIL...WIND GUSTS IN EXCESS OF 50 MPH AND DEADLY LIGHTNING. THE STORMS ARE MOVING ACROSS THE HILL COUNTRY TO THE EAST AT 40 MPH. AT THIS SPEED THE STORMS WILL EXIT THE HILL COUNTRY AND AFFECT THE INTERSTATE 35 CORRIDOR AROUND RUSH HOUR...THEN MOVE ACROSS NORTHERN SECTIONS OF SOUTH CENTRAL TEXAS BEFORE NOON. RAINFALL AMOUNTS FROM THE STORMS WILL AVERAGE 1/2 TO 1 INCH WITH HIGHER TOTALS OF 3 INCHES POSSIBLE MAINLY EAST OF THE INTERSTATE 35 CORRIDOR. 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, Apr 26, 5:47 AM CDT, 5 hours 7 minutes before
TXZ171>173-183>194-202>209-217>225-228-262201- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 547 AM CDT MON APR 26 1999 THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS MORNING. A LINE OF STRONG TO SEVERE THUNDERSTORMS HAS DEVELOPED ALONG AND JUST AHEAD OF A COLD FRONTAL BOUNDARY. THE STORMS ARE CAPABLE OF PRODUCING LARGE HAIL...WIND GUSTS IN EXCESS OF 50 MPH AND DEADLY LIGHTNING. THE STORMS ARE MOVING ACROSS THE HILL COUNTRY TO THE EAST AT 40 MPH. AT THIS SPEED THE STORMS WILL EXIT THE HILL COUNTRY AND AFFECT THE INTERSTATE 35 CORRIDOR AROUND RUSH HOUR...THEN MOVE ACROSS NORTHERN SECTIONS OF SOUTH CENTRAL TEXAS BEFORE NOON. RAINFALL AMOUNTS FROM THE STORMS WILL AVERAGE 1/2 TO 1 INCH WITH HIGHER TOTALS OF 3 INCHES POSSIBLE MAINLY EAST OF THE INTERSTATE 35 CORRIDOR. 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 |
|---|---|---|---|---|
| Apr 26, 12:39 AM CDT | Severe Thunderstorm Warning | EWX | Maverick | 51 min |
| Apr 26, 5:49 AM CDT | Severe Thunderstorm Warning | EWX | Medina | 61 min |
| Apr 26, 6:07 AM CDT | Severe Thunderstorm Warning | EWX | Atascosa, Bexar | 63 min |
| Apr 26, 7:56 AM CDT | Severe Thunderstorm Warning | EWX | Bandera | 34 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.