Alert archive / Texas / Wind Advisories in 2011
Wind Advisory 6, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this wind advisory at Apr 10, 2011, 11:21 AM CDT for 18 counties in Texas. It was in force for 10 hr.
The area
The counties it named.
The facts
- Issued
- Apr 10, 2011, 11:21 AM CDT (16:21 UTC)
- Expired
- Apr 10, 2011, 9:23 PM CDT
- In force
- 10 hr
- Issued by
- NWS Austin/San Antonio, TX
Counties Atascosa County, TX, Bastrop County, TX, Bexar County, TX, Blanco County, TX, Burnet County, TX, Caldwell County, TX, Comal County, TX, DeWitt County, TX, Fayette County, TX, Gonzales County, TX, Guadalupe County, TX, Hays County, TX, Karnes County, TX, Lavaca County, TX, Lee County, TX, Travis County, TX, Williamson County, TX, Wilson County, TX
The radar
The Austin/San Antonio radar (KEWX), 26 km from the middle of the area, began a volume at 16:20 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, 4.4 hours before the alert went out and 231 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
- 229 J/kg
- Mixed-layer CIN
- -851 J/kg
- Mixed-layer LCL
- 723 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 84 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
054 WWUS74 KEWX 101621 NPWEWX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1121 AM CDT SUN APR 10 2011 ...A WIND ADVISORY IS IN EFFECT UNTIL 10 PM CDT TODAY FOR AREAS ALONG AND EAST OF HIGHWAY 281... .A TIGHTENING SURFACE PRESSURE GRADIENT COMBINED WITH HIGHER WINDS ALOFT MIXING TO THE SURFACE WILL PRODUCE WINDS 20 TO 30 MPH WITH GUST OVER 35 MPH. WINDS WILL DECREASE BELOW ADVISORY VALUES DURING THE LATE EVENING HOURS. TXZ172-173-190>194-205>209-220>225-110300- /O.NEW.KEWX.WI.Y.0006.110410T1621Z-110411T0300Z/ BURNET-WILLIAMSON-BLANCO-HAYS-TRAVIS-BASTROP-LEE-BEXAR-COMAL- GUADALUPE-CALDWELL-FAYETTE-ATASCOSA-WILSON-KARNES-GONZALES- DE WITT-LAVACA- INCLUDING THE CITIES OF...BURNET...GEORGETOWN...BLANCO... SAN MARCOS...AUSTIN...BASTROP...GIDDINGS...SAN ANTONIO... NEW BRAUNFELS...SEGUIN...LOCKHART...LA GRANGE...PLEASANTON... FLORESVILLE...KARNES CITY...GONZALES...CUERO...HALLETTSVILLE 1121 AM CDT SUN APR 10 2011 ...WIND ADVISORY IN EFFECT UNTIL 10 PM CDT THIS EVENING... THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A WIND ADVISORY...WHICH IS IN EFFECT UNTIL 10 PM CDT THIS EVENING. A TIGHTENING SURFACE PRESSURE GRADIENT COMBINED WITH HIGHER WINDS ALOFT MIXING TO THE SURFACE WILL PRODUCE WINDS 20 TO 30 MPH WITH GUST OVER 35 MPH. WINDS WILL DECREASE BELOW ADVISORY VALUES DURING THE LATE EVENING HOURS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WIND ADVISORY MEANS THAT SUSTAINED WINDS OF 26 TO 39 MPH ARE EXPECTED. WINDS THIS STRONG CAN MAKE DRIVING DIFFICULT... ESPECIALLY FOR HIGH PROFILE VEHICLES. USE EXTRA CAUTION. && $$
1 follow-up statement
765 WWUS74 KEWX 110223 NPWEWX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 923 PM CDT SUN APR 10 2011 ...WIND ADVISORY FOR AREAS ALONG AND EAST OF HIGHWAY 281 HAS BEEN CANCELLED... .WITH THE LOSS OF DAYTIME HEATING...MIXING OF THE STRONGER UPPER LEVEL WINDS TO THE SURFACE HAS ENDED...THUS LOWERING SURFACE WINDS SPEEDS FROM CRITERIA LEVELS. THUS...THE WIND ADVISORY HAS BEEN CANCELLED. TXZ172-173-190>194-205>209-220>225-110330- /O.CAN.KEWX.WI.Y.0006.000000T0000Z-110411T0300Z/ BURNET-WILLIAMSON-BLANCO-HAYS-TRAVIS-BASTROP-LEE-BEXAR-COMAL- GUADALUPE-CALDWELL-FAYETTE-ATASCOSA-WILSON-KARNES-GONZALES- DE WITT-LAVACA- INCLUDING THE CITIES OF...BURNET...GEORGETOWN...BLANCO... SAN MARCOS...AUSTIN...BASTROP...GIDDINGS...SAN ANTONIO... NEW BRAUNFELS...SEGUIN...LOCKHART...LA GRANGE...PLEASANTON... FLORESVILLE...KARNES CITY...GONZALES...CUERO...HALLETTSVILLE 923 PM CDT SUN APR 10 2011 ...WIND ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS CANCELLED THE WIND ADVISORY. WITH THE LOSS OF DAYTIME HEATING...MIXING OF THE STRONGER UPPER LEVEL WINDS TO THE SURFACE HAS ENDED...THUS LOWERING SURFACE WINDS SPEEDS FROM CRITERIA LEVELS. THUS...THE WIND ADVISORY HAS BEEN CANCELLED. $$
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 9:09 PM CDT | Red Flag Warning | EWX | Edwards, Kinney, Maverick, Val Verde | 42 hr |
| Apr 10, 3:11 PM CDT | Red Flag Warning | EWX | Atascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 23 more | 24 hr |
Nearby
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.