Alert archive / Texas / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 110, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Aug 24, 2011, 9:42 PM CDT for Fayette County, Lavaca County, Texas. It was in force for 18 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 24, 2011, 9:42 PM CDT (02:42 UTC)
- Expired
- Aug 24, 2011, 10:00 PM CDT
- In force
- 18 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), 111 km from the middle of the area, began a volume at 02:44 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 24, 9:55 PM CDT | TSTM WND GST 60 | Schulenburg, TX | POWER OUTAGES ACROSS THE CITY |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 13 minutes after it went out.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 00:00Z, 2.7 hours before the alert went out and 217 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
- 2141 J/kg
- Mixed-layer CIN
- -67 J/kg
- Mixed-layer LCL
- 1307 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 33 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted, in the capitals the NWS used until 2016.
543
WUUS54 KEWX 250242
SVREWX
TXC149-285-250300-
/O.NEW.KEWX.SV.W.0110.110825T0242Z-110825T0300Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
942 PM CDT WED AUG 24 2011
THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTH CENTRAL FAYETTE COUNTY...
NORTHWESTERN LAVACA COUNTY...
* UNTIL 1000 PM CDT.
* AT 939 PM CDT...NWS METEOROLOGISTS HAVE DETECTED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60
MPH. THIS STORM WAS LOCATED 6 MILES NORTHEAST OF SCHULENBURG...AND
MOVING SOUTHWEST AT 20 MPH.
* SOME LOCATIONS IN THE WARNING INCLUDE HALLETTSVILLE.
LAT...LON 2969 9681 2966 9685 2963 9686 2960 9683
2937 9698 2952 9720 2982 9684 2976 9675
TIME...MOT...LOC 0242Z 039DEG 19KT 2973 9683
$$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 24, 7:13 PM CDT, 2 hours 29 minutes earlier.
Area forecast discussion, Aug 24, 7:13 PM CDT, 2 hours 29 minutes before
AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 713 PM CDT WED AUG 24 2011 .UPDATE... HAVE ADDED ISOLATED SHOWERS AND THUNDERSTORMS TO OUR NORTHEAST COUNTIES FOR THIS EVENING. && .DISCUSSION... CONVECTION ALONG AN OUTFLOW BOUNDARY WAS RACING SOUTHWEST AT 35 TO 40 MPH. THIS WILL RESULT IN ISOLATED SHOWERS AND THUNDERSTORMS MOVING INTO OUR NORTHEAST COUNTIES BY 8 PM. WITH THE LOSS OF DAYTIME HEATING AND RIDGING ALOFT...EXPECT THE CONVECTION TO WEAKEN AND DISSIPATE BY MIDNIGHT. GRIDS AND TEXT PRODUCTS UPDATED. && .PREV DISCUSSION... /ISSUED 630 PM CDT WED AUG 24 2011/ AVIATION... HIGH PRESSURE ALOFT WILL PROMOTE MOSTLY VFR CONDITIONS TONIGHT AND THURSDAY. SOME BRIEF AND PATCHY MVFR CIGS MAY DEVELOP ALONG I-35 CORRIDOR TERMINALS AROUND DAWN. LIGHT SOUTH TO SOUTHEAST WINDS 5 TO 10 KTS. PREV DISCUSSION... /ISSUED 320 PM CDT WED AUG 24 2011/ DISCUSSION... THE SUBTROPICAL RIDGE CURRENTLY CENTERED OVER NORTHWESTERN TEXAS WILL CONTINUE TO BE THE DOMINANT FEATURE FOR SOUTH CENTRAL TEXAS FOR THIS FORECAST CYCLE. A SHORT-WAVE CURRENTLY DROPPING SOUTH OVER LOUISIANA AND FAR EASTERN TEXAS WILL ROTATE AROUND THE RIDGE. HOWEVER...ONLY ISOLATED THUNDERSTORMS AT BEST CAN BE EXPECTED LATE THURSDAY AFTERNOON INTO EVENING AS STRONG SUBSIDENCE AND WARM MID LEVEL TEMPERATURES CAPPING THE AIRMASS UNDERNEATH THE RIDGE WILL PREVAIL AND WILL NOT MENTION POPS. THE CENTER OF THE RIDGE WILL SLOWLY DRIFT WEST TO THE FOUR CORNERS AREA BY THE WEEKEND WHILE A THERMAL RIDGE MOVES INTO SOUTH CENTRAL TEXAS. 850 MB TEMPERATURES WILL WARM INTO THE UPPER 20S TO NEAR 30 CELSIUS. IN ADDITION...A DRIER AIRMASS WILL MOVE INTO THE AREA BEHIND A WEAK SURFACE BOUNDARY. EXPECT STRONG MIXING TO ALLOW TEMPERATURES TO APPROACH OR BREAK DAILY HIGH TEMPERATURE RECORDS. OVER THE WEEKEND...EVEN THE ALL-TIME HIGH TEMPERATURE RECORDS WILL BE APPROACHED. HIGHS WILL SOAR INTO THE 105 TO 110 DEGREE RANGE...EXCEPT 100 TO 105 DEGREES IN THE HILL COUNTRY. DEW POINTS WILL DROP INTO THE 40S MAKING HEAT INDICES AND APPARENT TEMPERATURES LOWER THAN THE AIR TEMPERATURES DURING THE AFTERNOON INTO EVENING HOURS. NEXT WEEK...THE CENTER MOVES BACK EAST OVER TEXAS WHILE SHRINKING A LITTLE. HIGH TEMPERATURES WILL RETREAT BACK FROM NEAR ALL-TIME LEVELS...ALTHOUGH REMAIN ABOVE 100 MOST AREAS. SOME MOISTURE MAY MOVE BACK INTO THE COASTAL PLAINS. HOWEVER...NOT ENOUGH TO GENERATE ISOLATED SEABREEZE CONVECTION. BEYOND THIS FORECAST...FOR LATE NEXT WEEK THROUGH THE LABOR DAY WEEKEND...LITTLE OR NO PATTERN CHANGE IS EXPECTED WITH 100 DEGREE HIGH TEMPERATURES FOR MOST AREAS LIKELY. FIRE WEATHER... ELEVATED FIRE WEATHER CONDITIONS WILL CONTINUE FOR THE NEXT SEVERAL DAYS. AFTERNOON RELATIVE HUMIDITIES WILL FALL INTO THE UPPER TEENS TO LOWER 20S THURSDAY INTO FRIDAY. BY THE WEEKEND...A HOTTER AND DRIER AIRMASS WILL MOVE INTO THE AREA AND RESULT IN AFTERNOON RELATIVE HUMIDITIES FALLING INTO THE LOWER TO MID TEENS. HOWEVER...20-FOOT WINDS WILL GENERALLY REMAIN AROUND 10 MPH OR LESS. CLIMATE... RECORD HIGH TEMPERATURES FOR AUGUST 25 THROUGH 28: AUSTIN BERGSTROM...104/1952...103/2009...105/1990...102/1990 AUSTIN CAMP MABRY..105/1924...107/1924...106/1990...104/1990 SAN ANTONIO........102/2006...102/2006...102/1990...101/1940 DEL RIO............103/2006...103/2002...107/2002...102/2002 ALL-TIME RECORD HIGH TEMPERATURES AUSTIN BERGSTROM...112...SEP 5..2000 AUSTIN CAMP MABRY..112...SEP 5..2000 SAN ANTONIO........111...SEP 5..2000 DEL RIO............112...JUN 9..1988 && .PRELIMINARY POINT TEMPS/POPS... AUSTIN CAMP MABRY 79 105 79 109 79 / - - - - 0 AUSTIN BERGSTROM INTL AIRPORT 75 104 74 107 74 / - - - - 0 NEW BRAUNFELS MUNI AIRPORT 75 103 75 107 75 / - - - - 0 BURNET MUNI AIRPORT 78 103 78 106 77 / - - - - 0 DEL RIO INTL AIRPORT 80 102 80 104 80 / - - - - 0 GEORGETOWN MUNI AIRPORT 79 102 78 106 77 / 10 - - - 0 HONDO MUNI AIRPORT 76 103 76 106 77 / - - - - 0 SAN MARCOS MUNI AIRPORT 77 102 77 106 77 / - - - - 0 LA GRANGE - FAYETTE REGIONAL 76 103 77 106 76 / 10 - - - 0 SAN ANTONIO INTL AIRPORT 79 102 79 106 80 / - - - - 0 STINSON MUNI AIRPORT 79 104 78 109 80 / - - - - 0 && .EWX WATCHES/WARNINGS/ADVISORIES... HEAT ADVISORY UNTIL 7 PM CDT SATURDAY FOR THE FOLLOWING COUNTIES: BEXAR...COMAL...GUADALUPE...HAYS...TRAVIS...WILLIAMSON. && MESOSCALE/AVIATION...02 SYNOPTIC/GRIDS...13 PUBLIC SERVICE/DATA COLLECTION...31
Hazardous weather outlook, Aug 24, 5:04 AM CDT, 16 hours 38 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 504 AM CDT WED AUG 24 2011 TXZ171>173-183>194-202>209-217>225-228-251015- 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- 504 AM CDT WED AUG 24 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS. .DAY ONE...TODAY AND TONIGHT... A HEAT ADVISORY IS IN EFFECT FOR WILLIAMSON...TRAVIS...HAYS... BEXAR...GUADALUPE AND COMAL COUNTIES. ELEVATED FIRE WEATHER CONDITIONS ARE EXPECTED THIS AFTERNOON AND THIS EVENING DUE TO LOW RELATIVE HUMIDITIES AND MODERATE WINDS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY... A HEAT ADVISORY WILL REMAIN IN EFFECT FOR WILLIAMSON...TRAVIS... HAYS...BEXAR...GUADALUPE AND COMAL COUNTIES THROUGH SATURDAY EVENING. ADDITIONALLY...THERE WILL BE ELEVATED FIRE WEATHER CONDITIONS EACH AFTERNOON AND EVENING DUE TO LOW RELATIVE HUMIDITIES AND MODERATE WINDS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
In the hours before
Special weather statement, Aug 24, 7:53 PM CDT, 1 hour 49 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 753 PM CDT WED AUG 24 2011 TXZ172-173-192>194-209-250200- BURNET-WILLIAMSON-TRAVIS-BASTROP-LEE-FAYETTE- INCLUDING THE CITIES OF...BURNET...GEORGETOWN...AUSTIN... BASTROP...GIDDINGS...LA GRANGE 753 PM CDT WED AUG 24 2011 ...OUTFLOW BOUNDARY APPROACHING LEE...WILLIAMSON AND FAYETTE COUNTIES... AN OUTFLOW BOUNDARY IS MOVING SOUTHWEST AT 35 MPH AND WILL ENTER EASTERN LEE COUNTY AROUND 815 PM. WIND GUSTS OF 35 TO 45 MPH WILL ACCOMPANY THIS BOUNDARY AS IN MOVES SOUTHWESTWARD. DAMAGE TO DROUGHT STRESSED TREES IS LIKELY.
Special weather statement, Aug 24, 9:09 PM CDT, 33 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 909 PM CDT WED AUG 24 2011 TXZ209-250245- FAYETTE- 909 PM CDT WED AUG 24 2011 ...SIGNIFICANT WEATHER ADVISORY FOR FAYETTE COUNTY UNTIL 945 PM CDT... AT 900 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A STRONG THUNDERSTORM 6 MILES NORTHEAST OF FAYETTEVILLE...OR 16 MILES EAST OF LA GRANGE...MOVING SOUTHWEST AT 25 MPH. THE OUTFLOW BOUNDARY FROM THIS THUNDERSTORM WILL PRODUCE WIND GUSTS OF 35 TO 45 MPH. DAMAGE TO DROUGHT STRESSED TREES ARE POSSIBLE. LOCATIONS IMPACTED BY THE OUTFLOW BOUNDARY INCLUDE... LA GRANGE... SCHULENBURG... FAYETTEVILLE... MULDOON... CISTERN... REK HILL... RUTERSVILLE... RABBS PRAIRIE... PLUM... ELLINGER... IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 9:55 PM CDT | Severe Thunderstorm Warning | EWX | Fayette, Lavaca | 43 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2011Every severe thunderstorm warning in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.