Alert archive / Texas / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 12, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Mar 18, 1997, 11:41 AM CST for DeWitt County, Texas. It was in force for 64 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
- Mar 18, 1997, 11:41 AM CST (17:41 UTC)
- Expired
- Mar 18, 1997, 12:45 PM CST
- In force
- 64 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County DeWitt County, TX
The radar
The Austin/San Antonio radar (KEWX), 95 km from the middle of the area, began a volume at 17:42 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, 5.7 hours before the alert went out and 150 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
- 1325 J/kg
- Mixed-layer CIN
- -62 J/kg
- Mixed-layer LCL
- 509 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 47 m²/s²
- 0-3 km storm-relative helicity
- 88 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSAT 181741 RRA SVRSAT TXC123-181845- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1141 AM CST TUE MAR 18 1997 THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1245 PM CST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH CENTRAL TEXAS ...DE WITT COUNTY AT 11:40 AM RADAR INDICATED A SEVERE THUNDERSTORM WITH LARGE HAIL AND DAMAGING WINDS 10 MILES WEST OF YORKTOWN. MOVEMENT WAS NORTHEAST AT 30 MPH. SEVERE THUNDERSTORM WINDS CAN REACH SPEEDS OVER 60 MPH. THESE WINDS BLOW DOWN TREES...POWER LINES...AND SEVERELY DAMAGE MOBILE HOMES... SOMETIMES BUILDINGS. VERY LARGE HAIL CAN INJURE ANYONE CAUGHT OUTSIDE.
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 18, 5:53 AM CST, 5 hours 48 minutes before
TXZ171>173-183>194-202>209-217>225-228-190000- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 600 AM CST TUE MAR 18 1997 A DENSE FOG ADVISORY IS IN EFFECT THROUGH 9 AM FOR THE HILL COUNTRY AND PORTIONS OF SOUTH CENTRAL TEXAS. AREAS OF FOG WITH VISIBILITIES OF 1/4 MILE OR LESS WILL CONTINUE ACROSS THE HILL COUNTRY AND SOUTH CENTRAL TEXAS THROUGH MID MORNING. THEN THE FOG WILL LIFT WITH VISIBILITIES IMPROVING TO GREATER THAN 7 MILES BY 10 AM. WIDESPREAD HAZARDOUS DRIVING CONDITIONS ARE POSSIBLE UNTIL 9 AM. A COLD FRONT AND UPPER LEVEL DISTURBANCE WILL MOVE IN THE NORTHWEST HILL COUNTRY AROUND NOON AND ACROSS THE REMAINDER OF THE HILL COUNTRY AND SOUTH CENTRAL TEXAS THIS AFTERNOON. WIDELY SCATTERED SHOWERS AND THUNDERSTORMS ARE POSSIBLE OVER THE HILL COUNTRY AND SOUTHERN EDWARDS PLATEAU DURING THE DAY...WHILE SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP OVER SOUTH CENTRAL TEXAS BY THIS AFTERNOON AND CONTINUE INTO THE EARLY EVENING HOURS. RAINFALL AMOUNTS WILL GENERALLY AVERAGE ONE TENTH OF AN INCH OR LESS WITH ISOLATED TOTALS AROUND ONE-HALF INCH. SEVERE THUNDERSTORMS ARE NOT EXPECTED OVER THE HILL COUNTRY AND SOUTH CENTRAL TEXAS. 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 UNFORECAST HAZARDOUS WEATHER DEVELOPS OR IF FORECAST HAZARDOUS WEATHER NO LONGER IS EXPECTED.
Special weather statement, Mar 18, 6:00 AM CST, 5 hours 41 minutes before
TXZ171>173-183>194-202>209-217>225-228-190000- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 600 AM CST TUE MAR 18 1997 A DENSE FOG ADVISORY IS IN EFFECT THROUGH 9 AM FOR THE HILL COUNTRY AND PORTIONS OF SOUTH CENTRAL TEXAS. AREAS OF FOG WITH VISIBILITIES OF 1/4 MILE OR LESS WILL CONTINUE ACROSS THE HILL COUNTRY AND SOUTH CENTRAL TEXAS THROUGH MID MORNING. THEN THE FOG WILL LIFT WITH VISIBILITIES IMPROVING TO GREATER THAN 7 MILES BY 10 AM. WIDESPREAD HAZARDOUS DRIVING CONDITIONS ARE POSSIBLE UNTIL 9 AM. A COLD FRONT AND UPPER LEVEL DISTURBANCE WILL MOVE IN THE NORTHWEST HILL COUNTRY AROUND NOON AND ACROSS THE REMAINDER OF THE HILL COUNTRY AND SOUTH CENTRAL TEXAS THIS AFTERNOON. WIDELY SCATTERED SHOWERS AND THUNDERSTORMS ARE POSSIBLE OVER THE HILL COUNTRY AND SOUTHERN EDWARDS PLATEAU DURING THE DAY...WHILE SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP OVER SOUTH CENTRAL TEXAS BY THIS AFTERNOON AND CONTINUE INTO THE EARLY EVENING HOURS. RAINFALL AMOUNTS WILL GENERALLY AVERAGE ONE TENTH OF AN INCH OR LESS WITH ISOLATED TOTALS AROUND ONE-HALF INCH. SEVERE THUNDERSTORMS ARE NOT EXPECTED OVER THE HILL COUNTRY AND SOUTH CENTRAL TEXAS. 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 UNFORECAST HAZARDOUS WEATHER DEVELOPS OR IF FORECAST HAZARDOUS WEATHER NO LONGER IS EXPECTED.
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.