Alert archive / Texas / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 90, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 27, 1997, 4:37 PM CDT for Williamson County, Texas. It was in force for 68 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 27, 1997, 4:37 PM CDT (21:37 UTC)
- Expired
- May 27, 1997, 5:45 PM CDT
- In force
- 68 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Williamson County, TX
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 27, 4:37 PM CDT | Thunderstorm Wind 52 | Round Rock, 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 27, 1:15 PM CDT | Tornado Watch | SPC | 6 hr |
| May 27, 3:45 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Fort Worth, TX (KFWD), launched 12:00Z, 9.6 hours before the alert went out and 245 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
- 4281 J/kg
- Mixed-layer CIN
- -43 J/kg
- Mixed-layer LCL
- 590 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 58 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 3.4
The text
As transmitted, in the capitals the NWS used until 2016.
115 WUUS1 KSAT 272136 RRA SVRSAT TXC491-272245- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 437 PM CDT TUE MAY 27 1997 THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 545 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH CENTRAL TEXAS ...WILLIAMSON COUNTY AT 435 PM CDT SEVERE THUNERSTORMS CONTINUE ACROSS MUCH OF CENTRAL WILLIAMSON COUNTY. TORNADOES HAVE BEEN REPORTED IN CEDAR PARK AND NORTH AUSTIN CAUSING EXTENSIVE DAMAGE. HIGH WINDS AND VERY LARGE HAIL CAN BE EXPECTED OVER THE NEXT HOUR FOR PERSONS IN ROUND ROCK...GEORGETOWN...GRANGER AND TAYLOR. THIS IS A DANGEROUS STORM...TAKE COVER IMMEDIATELY IF YOU ARE IN ITS PATH. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR BUILDING...STAY AWAY FROM WINDOWS SEVERE THUNDERSTORMS CAN CAUSE AS MUCH DAMAGE AS A TORNADO. IF YOU SEE SEVERE WEATHER TAKING PLACE...CALL YOUR REPORT TO THE NEAREST LAW ENFORCEMENT AGENCY FOR IMMEDIATE RELAY TO THE NATIONAL WEATHER SERVICE. &
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 27, 11:14 AM CDT, 5 hours 23 minutes before
TXZ171>173-183>194-202>209-217>225-228-272300- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1115 AM CDT TUE MAY 27 1997 ...SEVERE THUNDERSTORM AND HEAVY RAIN EVENT DEVELOPING ACROSS SOUTH TEXAS AND THE HILL COUNTRY THIS AFTERNOON AND TONIGHT... THE NATIONAL WEATHER SERVICE IS CLOSELY MONITORING A WEAK COLD FRONT MOVING THROUGH SOUTH TEXAS. THIS COLD FRONT IS EXPECTED TO BECOME STATIONARY LATE THIS AFTERNOON AND INTERACT WITH AN UPPER LEVEL DISTURBANCE IGNITING A ROUND OF SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS WITH VERY HEAVY RAIN. THE ATMOSPHERE IS VERY MOIST AND UNSTABLE ACROSS SOUTH TEXAS. CONDITIONS ARE BECOMING INCREASINGLY FAVORABLE FOR THE DEVELOPMENT OF SCATTERED SEVERE THUNDERSTORMS WITH LARGE HAIL... DAMAGING WINDS AND VERY HEAVY RAINFALL. THE MOST SEVERE STORMS MAY PRODUCE ISOLATED TORNADOES. THIS ACTIVITY SHOULD DEVELOP LATE THIS AFTERNOON AND DECREASE IN SEVERITY LATE THIS EVENING. THIS SYSTEM WILL EVOLVE INTO A HEAVY RAIN EVENT OVER PORTIONS OF SOUTH CENTRAL TEXAS... THE HILL COUNTRY AND SOUTHEAST TEXAS TONIGHT WITH ISOLATED SEVERE THUNDERSTORMS. A GENERAL 1/2 TO 1 INCH RAINFALL IS POSSIBLE WITH ISOLATED TOTALS NEAR 3 INCHES OR MORE WHERE THUNDERSTORMS MERGE OR REDEVELOP ACROSS A PARTICULAR LOCATION. A FLASH FLOOD WATCH MAY BE REQUIRED TONIGHT ACROSS PORTIONS OF SOUTH TEXAS. THE HAZARDOUS WEATHER OUTLOOK WILL NORMALLY BE UPDATED BY MEANS OF THE ZONE FORECAST...SHORT TERM FORECAST...WATCHES...WARNINGS AND ADVISORIES. THE HAZARDOUS WEATHER OUTLOOK ITSELF WILL BE UPDATED ONLY IF UNFORECAST HAZARDOUS WEATHER DEVELOPS OR IF FORECAST HAZARDOUS WEATHER IS NO LONGER EXPECTED.
Special weather statement, May 27, 11:15 AM CDT, 5 hours 22 minutes before
TXZ171>173-183>194-202>209-217>225-228-272300- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1115 AM CDT TUE MAY 27 1997 ...SEVERE THUNDERSTORM AND HEAVY RAIN EVENT DEVELOPING ACROSS SOUTH TEXAS AND THE HILL COUNTRY THIS AFTERNOON AND TONIGHT... THE NATIONAL WEATHER SERVICE IS CLOSELY MONITORING A WEAK COLD FRONT MOVING THROUGH SOUTH TEXAS. THIS COLD FRONT IS EXPECTED TO BECOME STATIONARY LATE THIS AFTERNOON AND INTERACT WITH AN UPPER LEVEL DISTURBANCE IGNITING A ROUND OF SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS WITH VERY HEAVY RAIN. THE ATMOSPHERE IS VERY MOIST AND UNSTABLE ACROSS SOUTH TEXAS. CONDITIONS ARE BECOMING INCREASINGLY FAVORABLE FOR THE DEVELOPMENT OF SCATTERED SEVERE THUNDERSTORMS WITH LARGE HAIL... DAMAGING WINDS AND VERY HEAVY RAINFALL. THE MOST SEVERE STORMS MAY PRODUCE ISOLATED TORNADOES. THIS ACTIVITY SHOULD DEVELOP LATE THIS AFTERNOON AND DECREASE IN SEVERITY LATE THIS EVENING. THIS SYSTEM WILL EVOLVE INTO A HEAVY RAIN EVENT OVER PORTIONS OF SOUTH CENTRAL TEXAS... THE HILL COUNTRY AND SOUTHEAST TEXAS TONIGHT WITH ISOLATED SEVERE THUNDERSTORMS. A GENERAL 1/2 TO 1 INCH RAINFALL IS POSSIBLE WITH ISOLATED TOTALS NEAR 3 INCHES OR MORE WHERE THUNDERSTORMS MERGE OR REDEVELOP ACROSS A PARTICULAR LOCATION. A FLASH FLOOD WATCH MAY BE REQUIRED TONIGHT ACROSS PORTIONS OF SOUTH TEXAS. THE HAZARDOUS WEATHER OUTLOOK WILL NORMALLY BE UPDATED BY MEANS OF THE ZONE FORECAST...SHORT TERM FORECAST...WATCHES...WARNINGS AND ADVISORIES. THE HAZARDOUS WEATHER OUTLOOK ITSELF WILL BE UPDATED ONLY IF UNFORECAST HAZARDOUS WEATHER DEVELOPS OR IF FORECAST HAZARDOUS WEATHER IS NO LONGER EXPECTED.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 27, 3:30 PM CDT | Tornado Warning | EWX | Williamson | 60 min |
| May 27, 3:34 PM CDT | Severe Thunderstorm Warning | EWX | Edwards | 56 min |
| May 27, 3:58 PM CDT | Severe Thunderstorm Warning | EWX | Real | 62 min |
| May 27, 4:09 PM CDT | Tornado Warning | EWX | Travis | 66 min |
| May 27, 4:26 PM CDT | Flash Flood Warning | EWX | Edwards, Real | 2 hr |
| May 27, 4:32 PM CDT | Flash Flood Warning | EWX | Travis, Williamson | 118 min |
| May 27, 4:49 PM CDT | Severe Thunderstorm Warning | EWX | Edwards | 56 min |
| May 27, 4:58 PM CDT | Tornado Warning | EWX | Hays | 62 min |
| May 27, 5:19 PM CDT | Severe Thunderstorm Warning | EWX | Travis | 56 min |
| May 27, 5:24 PM CDT | Severe Thunderstorm Warning | EWX | Blanco | 66 min |
| May 27, 5:37 PM CDT | Flash Flood Warning | EWX | Uvalde | 98 min |
| May 27, 5:37 PM CDT | Severe Thunderstorm Warning | EWX | Uvalde | 98 min |
| May 27, 5:52 PM CDT | Tornado Warning | EWX | Kendall | 68 min |
| May 27, 5:58 PM CDT | Severe Thunderstorm Warning | EWX | Bastrop, Caldwell | 2 hr |
| May 27, 6:01 PM CDT | Severe Thunderstorm Warning | EWX | Hays | 59 min |
| May 27, 6:06 PM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 69 min |
| May 27, 6:14 PM CDT | Severe Thunderstorm Warning | EWX | Comal | 61 min |
| May 27, 6:24 PM CDT | Tornado Warning | EWX | Uvalde | 36 min |
| May 27, 6:28 PM CDT | Severe Thunderstorm Warning | EWX | Edwards | 62 min |
| May 27, 6:29 PM CDT | Severe Thunderstorm Warning | EWX | Guadalupe | 61 min |
| May 27, 6:56 PM CDT | Tornado Warning | EWX | Kendall | 64 min |
| May 27, 6:59 PM CDT | Severe Thunderstorm Warning | EWX | Bexar | 91 min |
Nearby
Severe Thunderstorm Warnings in Texas, 1997Every severe thunderstorm warning in 1997
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.