Alert archive / Texas / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 49, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Mar 27, 1999, 7:40 PM CST for Atascosa County, Bexar County, Texas. It was in force for 80 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
- Mar 27, 1999, 7:40 PM CST (01:40 UTC)
- Expired
- Mar 27, 1999, 9:00 PM CST
- In force
- 80 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
Counties Atascosa County, TX, Bexar County, TX
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 27, 8:20 PM CST | Thunderstorm Wind | San Antonio, TX | Severe thunderstorm winds knocked over power lines and blew down trees in the area near the intersection of Interstate 10 and Loop 410. |
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 00:00Z, 1.7 hours before the alert went out and 198 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
- 1314 J/kg
- Mixed-layer CIN
- -65 J/kg
- Mixed-layer LCL
- 499 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 166 m²/s²
- 0-3 km storm-relative helicity
- 323 m²/s²
- Significant tornado parameter
- 1.5
- Supercell composite
- 9.5
The text
As transmitted, in the capitals the NWS used until 2016.
999 WUUS1 KSAT 280139 RRA SVRSAT TXC013-029-259-280300- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 740 PM CST SAT MAR 27 1999 THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... KENDALL COUNTY IN TEXAS BEXAR COUNTY IN TEXAS ATASCOSA COUNTY IN TEXAS * UNTIL 900 PM CST * AT 740 PM ...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM HARPER TO DILLEY MOVING EAST NORTHEAST AT 35 MPH. * SEVERE THUNDERSTORMS WILL BE NEAR... I35 IN SAN ANTONIO AT 800 PM JOURDANTON AND BOERNE AT 810 PM DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS THIS LINE OF STORMS HAS A HISTORY PRODUCING DAMAGING WINDS AND FUNNEL CLOUDS. REMEMBER TORNADOES CAN ALSO OCCUR IN SEVERE THUNDERSTORMS. THE STORMS ARE ALSO PRODUCING RAINS OF 1 TO 2 INCHES PER HOUR. FLOODING OF SOME STREETS AND LOW WATER CROSSINGS CAN BE EXPECTED. MOTORISTS SHOULD AVOID DRIVING INTO WATER WHICH CROSSES THE ROAD MSF MSF
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, Mar 27, 6:00 PM CST, 1 hour 40 minutes before
TXZ171>173-183>194-202>209-217>225-228-281200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 600 PM CST SAT MAR 27 1999 STRONG THUNDERSTORMS WILL MOVE ACROSS SOUTH CENTRAL TEXAS TONIGHT WITH THE THREAT OF HEAVY RAIN...DEADLY LIGHTNING...AND STRONG WINDS. RAINFALL RATES OF ONE INCH PER HOUR WILL BE WIDESPREAD. 2 INCHES PER HOUR ARE POSSIBLE IN THE STRONGER STORMS. THE LINE OF THUNDERSTORMS WILL MOVE EAST OF SOUTH CENTRAL TEXAS BY MORNING. ADDITIONAL SHOWERS ARE EXPECTED ON SUNDAY WITH RAINFALL AMOUNTS GENERALLY ONE HALF INCH ARE LESS. 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, Mar 27, 6:00 PM CST, 1 hour 40 minutes before
TXZ171>173-183>194-202>209-217>225-228-281200- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 600 PM CST SAT MAR 27 1999 STRONG THUNDERSTORMS WILL MOVE ACROSS SOUTH CENTRAL TEXAS TONIGHT WITH THE THREAT OF HEAVY RAIN...DEADLY LIGHTNING...AND STRONG WINDS. RAINFALL RATES OF ONE INCH PER HOUR WILL BE WIDESPREAD. 2 INCHES PER HOUR ARE POSSIBLE IN THE STRONGER STORMS. THE LINE OF THUNDERSTORMS WILL MOVE EAST OF SOUTH CENTRAL TEXAS BY MORNING. ADDITIONAL SHOWERS ARE EXPECTED ON SUNDAY WITH RAINFALL AMOUNTS GENERALLY ONE HALF INCH ARE LESS. 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 |
|---|---|---|---|---|
| Mar 27, 6:25 PM CST | Tornado Warning | EWX | Uvalde, Zavala | 60 min |
| Mar 27, 6:55 PM CST | Severe Thunderstorm Warning | EWX | Bandera, Medina | 65 min |
| Mar 27, 6:55 PM CST | Severe Thunderstorm Warning | EWX | Frio | 65 min |
| Mar 27, 7:06 PM CST | Tornado Warning | EWX | Medina | 59 min |
| Mar 27, 7:40 PM CST | Severe Thunderstorm Warning | EWX | Kendall | 80 min |
| Mar 27, 8:25 PM CST | Severe Thunderstorm Warning | EWX | Comal, Guadalupe, Wilson | 80 min |
| Mar 27, 8:55 PM CST | Severe Thunderstorm Warning | EWX | Hays | 85 min |
| Mar 27, 8:55 PM CST | Severe Thunderstorm Warning | EWX | Karnes, Wilson | 85 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.