Alert archive / Texas / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 135, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Aug 26, 2009, 4:59 PM CDT for Fayette County, Lavaca County, Texas. It was in force for 46 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 26, 2009, 4:59 PM CDT (21:59 UTC)
- Expired
- Aug 26, 2009, 5:45 PM CDT
- In force
- 46 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
Counties Fayette County, TX, Lavaca County, TX
The radar
The Austin/San Antonio radar (KEWX), 107 km from the middle of the area, began a volume at 21:59 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, 10.0 hours before the alert went out and 215 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
- 1719 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 824 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- -51 m²/s²
- 0-3 km storm-relative helicity
- 6 m²/s²
- Significant tornado parameter
- -0.4
- Supercell composite
- -2.6
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 26, 3:17 PM CDT, 1 hour 42 minutes earlier.
Area forecast discussion, Aug 26, 3:17 PM CDT, 1 hour 42 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 317 PM CDT WED AUG 26 2009 .DISCUSSION... ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE TO DEVELOP ACROSS THE EASTERN HALF OF THE REGION THROUGH THIS EVENING. MOST OF THE ACTIVITY WILL DIMINISH WITHIN A FEW HOURS AFTER SUNSET AS DAYTIME HEATING IS LOST...BUT COULD SEE AN ISOLATED STORM HANG ON UNTIL MIDNIGHT. UPPER LEVEL HIGH CURRENTLY POISED ACROSS WEST TEXAS WILL MAKE A GRADUAL SHIFT TO THE NORTHWEST ON THURSDAY. HIGH TEMPERATURES WILL ONCE AGAIN PEAK NEAR THE CENTURY MARK DURING THE AFTERNOON. A WEAK COLD FRONT WILL DRIFT INTO SOUTH CENTRAL TEXAS ON FRIDAY. RAIN CHANCES AHEAD OF THE FRONT THURSDAY AFTERNOON AND OVERNIGHT ARE MENTIONABLE...BUT STILL DISAPPOINTING. RAIN CHANCES WILL PERSIST INTO FRIDAY AND COULD BE ENHANCED IN THE LATE AFTERNOON ALONG THE SEA-BREEZE BOUNDARY. NONETHELESS...HAVE CONTINUED THE TREND OF KEEPING RAIN CHANCES SLIGHT TO LOW-END CHANCE. TEMPERATURES ON FRIDAY WILL BE SLIGHTLY MODERATED AND ARE EXPECTED TO REMAIN IN THE MID TO UPPER 90S. MID AND LONG-RANGE MODELS CONTINUE TO DEPICT A TROPICAL SYSTEM DEVELOPING IN THE EASTERN PACIFIC NEXT WEEK. IF THIS PLAYS OUT...WILL SEE AN INCREASE IN MOISTURE ACROSS SOUTH CENTRAL TEXAS. OPTIMISTICALLY THIS WOULD BRING A FEW DAYS OF DECENT CHANCES FOR WIDESPREAD RAINS TO THE REGION. AS THIS WOULD BE MONDAY THROUGH NEXT WEDNESDAY HAVE GONE LOW ON POPS FOR THE TIME BEING. NONETHELESS...WITH NORTHWEST FLOW ALOFT TEMPERATURES WILL BE CLOSER TO NORMAL FOR EARLY SEPTEMBER WITH HIGHS IN THE LOWER TO MID 90S AND LOWS IN THE UPPER 60S TO LOWER 70S. && .PRELIMINARY POINT TEMPS/POPS... AUSTIN CAMP MABRY 75 100 74 96 70 / 20 20 20 20 10 AUSTIN BERGSTROM INTL AIRPORT 71 100 70 97 67 / 20 20 20 20 10 NEW BRAUNFELS MUNI AIRPORT 69 100 70 97 68 / 10 10 20 20 10 BURNET MUNI AIRPORT 72 97 71 94 68 / 20 30 20 20 10 DEL RIO INTL AIRPORT 74 101 75 97 73 / - 10 20 20 10 GEORGETOWN MUNI AIRPORT 74 100 73 96 68 / 20 30 20 20 10 HONDO MUNI AIRPORT 69 101 71 95 69 / - - 20 20 10 SAN MARCOS MUNI AIRPORT 71 99 71 95 68 / 20 10 20 20 10 LA GRANGE - FAYETTE REGIONAL 72 98 71 96 70 / 20 20 20 20 10 SAN ANTONIO INTL AIRPORT 74 100 74 96 73 / 10 10 20 20 10 STINSON MUNI AIRPORT 73 100 73 96 70 / 10 10 20 20 10 && .EWX WATCHES/WARNINGS/ADVISORIES... NONE. && 25/05
Hazardous weather outlook, Aug 26, 4:29 PM CDT, 30 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 429 PM CDT WED AUG 26 2009 TXZ171>173-183>193-202>208-217>224-228-272130- LLANO-BURNET-WILLIAMSON-VAL VERDE-EDWARDS-REAL-KERR-BANDERA- GILLESPIE-KENDALL-BLANCO-HAYS-TRAVIS-BASTROP-KINNEY-UVALDE-MEDINA- BEXAR-COMAL-GUADALUPE-CALDWELL-MAVERICK-ZAVALA-FRIO-ATASCOSA- WILSON-KARNES-GONZALES-DE WITT-DIMMIT- 429 PM CDT WED AUG 26 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS. .DAY ONE...TONIGHT... NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY... NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. TXZ194-209-225-272130- LEE-FAYETTE-LAVACA- 429 PM CDT WED AUG 26 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS. .DAY ONE...TONIGHT... THERE IS A SLIGHT RISK OF ISOLATED SEVERE THUNDERSTORMS THIS EVENING ACROSS LEE...FAYETTE AND LAVACA COUNTIES. THESE STORMS WILL BE CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY... 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 26, 4:50 PM CDT, 9 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 450 PM CDT WED AUG 26 2009 TXZ209-223-225-262245- FAYETTE-GONZALES-LAVACA- 450 PM CDT WED AUG 26 2009 ...A STRONG THUNDERSTORM WAS AFFECTING FAYETTE...GONZALES AND LAVACA COUNTIES... AT 449 PM CDT...NWS METEOROLOGISTS ARE TRACKING A STRONG THUNDERSTORM NEAR WEIMAR...OR 6 MILES EAST OF SCHULENBURG...MOVING SOUTHWEST AT 10 MPH. PEOPLE IN NORTHEASTERN GONZALES...NORTHWESTERN LAVACA AND SOUTHERN FAYETTE COUNTIES...INCLUDING THE FOLLOWING LOCATIONS...SCHULENBURG... SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR POSSIBLE WARNINGS AND BE PREPARED TO TAKE APPROPRIATE ACTION SHOULD SEVERE WEATHER THREATEN. WINDS 40 TO 50 MPH ARE EXPECTED WITH THIS STORM.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 26, 6:05 PM CDT | Severe Thunderstorm Warning | EWX | DeWitt, Gonzales, Lavaca | 40 min |
| Aug 26, 6:46 PM CDT | Severe Thunderstorm Warning | EWX | DeWitt, Gonzales | 44 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.