Alert archive / Texas / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 131, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Aug 22, 2009, 5:35 PM CDT for Bastrop County, Travis County, Texas. It was in force for 55 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
- Aug 22, 2009, 5:35 PM CDT (22:35 UTC)
- Expired
- Aug 22, 2009, 6:30 PM CDT
- In force
- 55 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
Counties Bastrop County, TX, Travis County, TX
The radar
The Ft Hood radar (KGRK), 58 km from the middle of the area, began a volume at 22:38 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
Fort Worth, TX (KFWD), launched 12:00Z, 10.6 hours before the alert went out and 291 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1980 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- -48 m²/s²
- 0-3 km storm-relative helicity
- 32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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.
NWS Austin/San Antonio, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 22, 2:43 PM CDT, 2 hours 52 minutes earlier.
Area forecast discussion, Aug 22, 2:43 PM CDT, 2 hours 52 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 243 PM CDT SAT AUG 22 2009 .DISCUSSION... TONIGHT THROUGH MONDAY- THE LONGWAVE TROF OVER THE EASTERN U.S. KEEPS THE COLD FRONT STEADILY MOVING SOUTH THRU THE EASTERN HALF OF TEXAS. THE FRONT WILL CLIP OUT NORTHEAST COUNTIES, ALIGNING NORTHWEST-SOUTHEAST AND SLICING THROUGH BURNETT, WILLIAMSON, AND LEE COUNTIES. BY MONDAY AFTERNOON, THE FRONT HAS SHIFTED A BIT EAST, JUST OUTSIDE OF THE CWA NEAR WILLIAMSON AND LEE COUNTIES. WILL KEEP LOW POPS IN THE VICINITY OF THE FRONT BECAUSE OF ISOLATED NATURE AND LACK OF OPTIMUM PRECIPITABLE WATER. THE UPPER HIGH IS BUFFETED FROM ALL SIDES BY PROGRESSIVE TROFS IN THE WESTERLIES AND DISTURBANCES IN THE EASTERLIES. THE UPPER HEIGHTS OVER THE CWA GRADUALLY FALL AS THE RIDGE AXIS SHIFTS WEST, ALLOWING A FEW DISTURBANCES TO MOVE THROUGH THE EASTERN HALF OF THE CWA. THE SHORTENING OF DAYLIGHT AND SLACK SFC GRADIENT ARE ALLOWING MIN TEMPS TO FALL TO SEASONAL NORMALS. TUESDAY THROUGH SATURDAY- ONCE AGAIN THE MODELS ARE SHOWING THE UPPER TROF BROADENING ACROSS THE U.S. CONFINING THE UPPER RIDGE TO THE ROCKIES. THE TRANSITION WILL BRING COOLER MORNINGS AS WE CONTINUE THE TRANSITION TOWARD FEWER MINUTES OF DAYLIGHT. DAYTIME HIGHS WILL MODERATE BUT REMAIN ABOVE NORMAL. && .PRELIMINARY POINT TEMPS/POPS... AUSTIN CAMP MABRY 77 101 76 99 75 / 20 10 - 10 10 AUSTIN BERGSTROM INTL AIRPORT 72 102 74 99 73 / 10 10 - 10 10 NEW BRAUNFELS MUNI AIRPORT 73 101 72 98 72 / 10 10 - 10 10 BURNET MUNI AIRPORT 74 98 74 98 74 / 10 10 - 10 10 DEL RIO INTL AIRPORT 76 106 77 101 76 / 10 10 0 - - GEORGETOWN MUNI AIRPORT 76 98 75 99 74 / 30 10 - 10 10 HONDO MUNI AIRPORT 73 102 73 100 72 / 10 10 - - - SAN MARCOS MUNI AIRPORT 74 100 73 98 73 / 10 10 - 10 10 LA GRANGE - FAYETTE REGIONAL 75 96 73 96 74 / 10 10 10 10 10 SAN ANTONIO INTL AIRPORT 78 101 76 99 76 / 10 10 - - - STINSON MUNI AIRPORT 76 103 74 100 73 / 10 10 - - - && .EWX WATCHES/WARNINGS/ADVISORIES... NONE. && 06/08
Hazardous weather outlook, Aug 22, 5:14 AM CDT, 12 hours 21 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 514 AM CDT SAT AUG 22 2009 TXZ171>173-183>194-202>209-217>225-228-231015- LLANO-BURNET-WILLIAMSON-VAL VERDE-EDWARDS-REAL-KERR-BANDERA- GILLESPIE-KENDALL-BLANCO-HAYS-TRAVIS-BASTROP-LEE-KINNEY-UVALDE- MEDINA-BEXAR-COMAL-GUADALUPE-CALDWELL-FAYETTE-MAVERICK-ZAVALA- FRIO-ATASCOSA-WILSON-KARNES-GONZALES-DE WITT-LAVACA-DIMMIT- 514 AM CDT SAT AUG 22 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS. .DAY ONE...TODAY AND TONIGHT... NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY... NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
In the hours before
Special weather statement, Aug 22, 2:48 PM CDT, 2 hours 47 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 248 PM CDT SAT AUG 22 2009 TXZ171>173-194-222200- LLANO-BURNET-WILLIAMSON-LEE- INCLUDING THE CITIES OF...LLANO...BURNET...GEORGETOWN...GIDDINGS 248 PM CDT SAT AUG 22 2009 ...MID TO LATE AFTERNOON THUNDERSTORMS POSSIBLE... WIDELY SCATTERED SHOWERS AND THUNDERSTORMS FROM NORTH OF LLANO TO EAST OF TAYLOR WILL CONTINUE TO MOVE SOUTH AT 20 MPH. THESE SHOWERS AND THUNDERSTORMS ARE EXPECTED TO MOVE OVER PARTS OF LLANO...BURNET...WILLIAMSON AND LEE COUNTIES THIS AFTERNOON. BRIEF WIND GUSTS OF 25 TO 45 MPH ARE POSSIBLE IN OR NEAR THE THUNDERSTORMS...ALONG WITH OCCASIONAL LIGHTNING. SPOTTY RAINFALL AMOUNTS NEAR A TRACE TO A QUARTER OF AN INCH ARE POSSIBLE.
Special weather statement, Aug 22, 4:50 PM CDT, 45 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 450 PM CDT SAT AUG 22 2009 TXZ171-172-222215- BURNET-LLANO- 450 PM CDT SAT AUG 22 2009 ...STRONG THUNDERSTORMS WERE AFFECTING BURNET AND LLANO COUNTIES... AT 450 PM CDT...NWS METEOROLOGISTS ARE TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM INKS LAKE STATE PARK TO 5 MILES NORTHWEST OF OXFORD TO FIELD CREEK...OR ALONG A LINE EXTENDING FROM 6 MILES NORTHEAST OF KINGSLAND TO 10 MILES SOUTHWEST OF LLANO TO 18 MILES NORTHEAST OF MASON...MOVING SOUTH AT 20 MPH. PEOPLE IN LLANO AND SOUTHWESTERN BURNET COUNTIES...INCLUDING THE FOLLOWING LOCATIONS...FIELD CREEK...INKS LAKE STATE PARK... GAINESVILLE...KINGSLAND...OXFORD...SUNRISE BEACH VILLAGE...GRANITE SHOALS...CASTELL AND PRAIRIE MOUNTAIN...SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR POSSIBLE WARNINGS AND BE PREPARED TO TAKE APPROPRIATE ACTION SHOULD SEVERE WEATHER THREATEN. SMALL HAIL...AND WINDS 30 TO 40 MPH ARE EXPECTED WITH THESE STORMS.
Special weather statement, Aug 22, 5:08 PM CDT, 27 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 508 PM CDT SAT AUG 22 2009 TXZ173-192>194-222245- BASTROP-LEE-TRAVIS-WILLIAMSON- 508 PM CDT SAT AUG 22 2009 ...A STRONG THUNDERSTORM WAS AFFECTING BASTROP...LEE...TRAVIS AND WILLIAMSON COUNTIES... AT 508 PM CDT...NWS METEOROLOGISTS ARE TRACKING A STRONG THUNDERSTORM NEAR ELGIN...MOVING SOUTH AT 10 MPH. PEOPLE IN EASTERN TRAVIS...NORTHERN BASTROP...SOUTHEASTERN WILLIAMSON AND WESTERN LEE COUNTIES...INCLUDING THE FOLLOWING LOCATIONS... ELGIN...SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR POSSIBLE WARNINGS AND BE PREPARED TO TAKE APPROPRIATE ACTION SHOULD SEVERE WEATHER THREATEN. MARBLE SIZE HAIL...AND WINDS 30 TO 40 MPH ARE EXPECTED WITH THIS STORM.
Special weather statement, Aug 22, 5:29 PM CDT, 6 minutes before
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</html>The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 9:12 PM CDT | Severe Thunderstorm Warning | EWX | Gonzales | 48 min |
| Aug 22, 6:16 PM CDT | Severe Thunderstorm Warning | EWX | Bastrop, Caldwell, Hays, Travis | 35 min |
| Aug 22, 6:18 PM CDT | Severe Thunderstorm Warning | EWX | Burnet, Travis, Williamson | 42 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2009Every severe thunderstorm warning in 2009
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.