Alert archive / Texas / Red Flag Warnings in 2011
Red Flag Warning 10, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this red flag warning at Apr 10, 2011, 3:11 PM CDT for 29 counties in Texas. It took effect at Apr 11, 2011, 2:00 AM CDT. It was in force for 13 hr. 11 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Apr 10, 2011, 3:11 PM CDT (20:11 UTC)
- In effect from
- Apr 11, 2011, 2:00 AM CDT
- Expired
- Apr 11, 2011, 3:26 PM CDT
- In force
- 13 hr
- Issued by
- NWS Austin/San Antonio, TX
All 29 counties
Atascosa County, TX, Bandera County, TX, Bastrop County, TX, Bexar County, TX, Blanco County, TX, Burnet County, TX, Caldwell County, TX, Comal County, TX, DeWitt County, TX, Dimmit County, TX, Fayette County, TX, Frio County, TX, Gillespie County, TX, Gonzales County, TX, Guadalupe County, TX, Hays County, TX, Karnes County, TX, Kendall County, TX, Kerr County, TX, Lavaca County, TX, Lee County, TX, Llano County, TX, Medina County, TX, Real County, TX, Travis County, TX, Uvalde County, TX, Williamson County, TX, Wilson County, TX, Zavala County, TX
The radar
The Austin/San Antonio radar (KEWX), 31 km from the middle of the area, began a volume at 20:13 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 |
|---|---|---|---|
| Apr 11, 4:42 AM CDT | HAIL 0.75 | 3 Ne Round Rock, TX | |
| Apr 11, 4:42 AM CDT | HAIL 0.75 | 4 Ene Round Rock, TX | |
| Apr 11, 4:43 AM CDT | HAIL 0.88 | 1 Ene Round Rock, TX | PUBLIC REPORT RELAYED VIA BROADCAST MEDIA REPORTED NICKEL SIZE HAIL NEAR FM 1460 AND AW GRIME BLVD. |
| Apr 11, 4:45 AM CDT | HAIL 1 | 3 Ne Round Rock, TX | PENNY HAIL INCREASED TO QUARTER SIZE HAIL |
| Apr 11, 5:00 AM CDT | HAIL 0.5 | 1 N Austin, TX | |
| Apr 11, 5:00 AM CDT | HAIL 0.7 | 1 N Austin, TX | |
| Apr 11, 5:00 AM CDT | HAIL 0.88 | 4 Nnw Austin, TX | |
| Apr 11, 5:02 AM CDT | HAIL 0.25 | 3 Ne Austin, TX | |
| Apr 11, 5:02 AM CDT | HAIL 0.75 | 3 Nne Austin, TX | |
| Apr 11, 5:05 AM CDT | TSTM WND DMG | Manor, TX | 15 FOOT SECTION OF STURDY WOODEN FENCE BLOWN DOWN ALONG WITH A COUPLE OF 5 INCH PLUS DIAMETER TREE BRANCHES |
| Apr 11, 5:10 AM CDT | HAIL 0.25 | Austin, TX | PEA SIZE HAIL AND ONE LARGE BRANCH SPLIT OFF A TREE ONTO THE ROAD AT ALLANDALE AND BULL CREEK |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 12:00Z, 8.2 hours before the alert went out and 241 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.
721 WWUS84 KEWX 102011 RFWEWX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 311 PM CDT SUN APR 10 2011 ...A RED FLAG WARNING IS IN EFFECT TONIGHT AND MONDAY ACROSS ALL OF SOUTH CENTRAL TEXAS DUE TO A DRY COLD FRONT... .A PACIFIC LOW PRESSURE SYSTEM WILL BRING A MOSTLY DRY COLD FRONT THROUGH SOUTH CENTRAL TEXAS TONIGHT. ISOLATED SHOWERS AND COULD FORM ALONG AND AHEAD OF THE COLD FRONT AS IT MOVES THROUGH CENTRAL AND EASTERN PARTS OF SOUTH CENTRAL TEXAS...WITH VERY FEW AREAS EXPECTED TO RECEIVE A WETTING RAIN. CRITICAL FIRE WEATHER CONDITIONS BEHIND THE FRONT ARE EXPECTED TO LAST SEVERAL HOURS... WITH THE WINDS FINALLY EXPECTED TO RELAX LATE IN THE DAY MONDAY. TXZ171>173-185>194-203>209-218>225-228-110700- /O.NEW.KEWX.FW.W.0010.110411T0700Z-110412T0100Z/ LLANO-BURNET-WILLIAMSON-REAL-KERR-BANDERA-GILLESPIE-KENDALL- BLANCO-HAYS-TRAVIS-BASTROP-LEE-UVALDE-MEDINA-BEXAR-COMAL- GUADALUPE-CALDWELL-FAYETTE-ZAVALA-FRIO-ATASCOSA-WILSON-KARNES- GONZALES-DE WITT-LAVACA-DIMMIT- 311 PM CDT SUN APR 10 2011 ...RED FLAG WARNING IN EFFECT FROM 2 AM TO 8 PM CDT MONDAY ACROSS CENTRAL AND EASTERN PORTIONS OF SOUTH CENTRAL TEXAS DUE TO A DRY COLD FRONT... THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT FROM 2 AM TO 8 PM CDT MONDAY. A COLD FRONT THAT WILL MOVE THROUGH THE AREA DURING THE EARLY TO MID MORNING HOURS WILL BRING WINDY AND VERY DRY CONDITIONS INTO SOUTH CENTRAL TEXAS. EXPECT CRITICAL FIRE WEATHER CONDITIONS TO REACH THE WESTERN HILL COUNTRY AND ADJACENT AREAS OF THE RIO GRANDE PLAINS BETWEEN 2 AM AND 5 AM CDT...AND ACROSS THE REST OF SOUTH CENTRAL TEXAS BETWEEN 4 AM AND 9 AM CDT. RELATIVE HUMIDITIES WILL FALL INTO THE 10 TO 20 PERCENT RANGE PRIOR TO DAYBREAK...AND THEN INTO THE 6 TO 15 PERCENT RANGE DURING THE DAY MONDAY. 20-FOOT LEVEL WINDS WILL BLOW FROM THE NORTHWEST AT 15 TO 20 MPH WITH SOME GUSTS TO 30 MPH. WINDS ARE EXPECTED TO DIMINISH FROM WEST TO EAST LATE MONDAY AFTERNOON INTO EARLY MONDAY EVENING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS WEATHER CONDITIONS WILL PROMOTE FIRES THAT ARE DIFFICULT TO CONTROL ACROSS THE WARNED AREA. A RED FLAG WARNING IS COMPLETELY SEPARATE FROM A LOCAL BURN BAN WHICH IS ISSUED BY LOCAL OFFICIALS. && $$ TXZ183-184-202-217-110700- /O.EXT.KEWX.FW.W.0009.110410T2300Z-110411T2100Z/ VAL VERDE-EDWARDS-KINNEY-MAVERICK- 311 PM CDT SUN APR 10 2011 ...RED FLAG WARNING NOW IN EFFECT FROM 6 PM THIS EVENING TO 4 PM CDT MONDAY ACROSS WESTERN PORTIONS OF SOUTH CENTRAL TEXAS DUE TO A DRY COLD FRONT... THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT FROM 6 PM THIS EVENING TO 8 PM CDT MONDAY. A COLD FRONT THAT WILL MOVE THROUGH THE AREA DURING THE EARLY TO MID MORNING HOURS WILL BRING WINDY AND VERY DRY CONDITIONS INTO SOUTH CENTRAL TEXAS. EXPECT CRITICAL FIRE WEATHER CONDITIONS TO REACH THE VAL VERDE COUNTY AS EARLY AS 6 PM...AND ADJACENT PORTIONS OF THE WESTERN HILL COUNTRY AND THE RIO GRANDE PLAINS BETWEEN 9 PM AND 2 AM CDT. RELATIVE HUMIDITIES WILL FALL INTO THE 10 TO 20 PERCENT RANGE OVERNIGHT...AND THEN INTO THE 5 TO 15 PERCENT RANGE DURING THE DAY MONDAY. 20-FOOT LEVEL WINDS WILL BLOW FROM THE NORTHWEST AT 15 TO 20 MPH WITH SOME GUSTS TO 30 MPH. WINDS ARE EXPECTED TO DIMINISH FROM WEST TO EAST BY LATE MONDAY AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS WEATHER CONDITIONS WILL PROMOTE FIRES THAT ARE DIFFICULT TO CONTROL ACROSS THE WARNED AREA. A RED FLAG WARNING IS COMPLETELY SEPARATE FROM A LOCAL BURN BAN WHICH IS ISSUED BY LOCAL OFFICIALS. && $$
2 follow-up statements
736 WWUS84 KEWX 110820 AAA RFWEWX URGENT - FIRE WEATHER MESSAGE...UPDATED NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 320 AM CDT MON APR 11 2011 ...A RED FLAG WARNING IS IN EFFECT ACROSS ALL OF SOUTH CENTRAL TEXAS DUE CRITICAL FIRE WEATHER CONDITIONS EXPECTED BEHIND A DRY PACIFIC COLD FRONT... .A DRY PACIFIC COLD FRONT WILL PUSH THROUGH SOUTH CENTRAL TEXAS EARLY THIS MORNING. CRITICAL FIRE WEATHER CONDITIONS ARE FORECAST BEHIND THE FRONT AND ARE EXPECTED CONTINUE MOST OF THE DAY...WITH THE WINDS FINALLY RELAXING LATE IN THE AFTERNOON OR EARLY EVENING HOURS. TXZ171>173-185>194-203>209-218>225-228-112030- /O.CON.KEWX.FW.W.0010.000000T0000Z-110412T0100Z/ LLANO-BURNET-WILLIAMSON-REAL-KERR-BANDERA-GILLESPIE-KENDALL- BLANCO-HAYS-TRAVIS-BASTROP-LEE-UVALDE-MEDINA-BEXAR-COMAL- GUADALUPE-CALDWELL-FAYETTE-ZAVALA-FRIO-ATASCOSA-WILSON-KARNES- GONZALES-DE WITT-LAVACA-DIMMIT- 320 AM CDT MON APR 11 2011 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING... A DRY PACIFIC COLD FRONT THAT WILL MOVE THROUGH THE AREA EARLY THIS MORNING WILL BRING WINDY AND VERY DRY CONDITIONS INTO SOUTH CENTRAL TEXAS. EXPECT CRITICAL FIRE WEATHER CONDITIONS TO REACH THE WESTERN HILL COUNTRY AND ADJACENT AREAS OF THE RIO GRANDE PLAINS BETWEEN 5 AM AND 7 AM CDT...AND ACROSS THE REST OF SOUTH CENTRAL TEXAS BETWEEN 7 AM AND 10 AM CDT. RELATIVE HUMIDITIES WILL FALL INTO THE 10 TO 20 PERCENT RANGE PRIOR TO NOON...AND THEN INTO THE 5 TO 15 PERCENT RANGE DURING THE AFTERNOON HOURS. 20-FOOT LEVEL WINDS WILL BLOW FROM THE NORTH AND NORTHWEST AT 15 TO 20 MPH WITH SOME GUSTS TO NEAR 30 MPH. WINDS ARE EXPECTED TO DIMINISH FROM WEST TO EAST LATE MONDAY AFTERNOON INTO EARLY MONDAY EVENING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS WEATHER CONDITIONS WILL PROMOTE FIRES THAT ARE DIFFICULT TO CONTROL ACROSS THE WARNED AREA. A RED FLAG WARNING IS COMPLETELY SEPARATE FROM A LOCAL BURN BAN WHICH IS ISSUED BY LOCAL OFFICIALS. && $$ TXZ183-184-202-217-112030- /O.CON.KEWX.FW.W.0009.000000T0000Z-110411T2100Z/ VAL VERDE-EDWARDS-KINNEY-MAVERICK- 320 AM CDT MON APR 11 2011 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 4 PM CDT THIS AFTERNOON... A COLD FRONT THAT WILL MOVE THROUGH THE AREA DURING THE EARLY TO MID MORNING HOURS WILL BRING WINDY AND VERY DRY CONDITIONS INTO SOUTH CENTRAL TEXAS. EXPECT CRITICAL FIRE WEATHER CONDITIONS TO REACH THE VAL VERDE COUNTY AS EARLY AS 6 PM...AND ADJACENT PORTIONS OF THE WESTERN HILL COUNTRY AND THE RIO GRANDE PLAINS BETWEEN 9 PM AND 2 AM CDT. RELATIVE HUMIDITIES WILL FALL INTO THE 10 TO 20 PERCENT RANGE OVERNIGHT...AND THEN INTO THE 5 TO 15 PERCENT RANGE DURING THE DAY MONDAY. 20-FOOT LEVEL WINDS WILL BLOW FROM THE NORTHWEST AT 15 TO 20 MPH WITH SOME GUSTS TO 30 MPH. WINDS ARE EXPECTED TO DIMINISH FROM WEST TO EAST BY LATE MONDAY AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS WEATHER CONDITIONS WILL PROMOTE FIRES THAT ARE DIFFICULT TO CONTROL ACROSS THE WARNED AREA. A RED FLAG WARNING IS COMPLETELY SEPARATE FROM A LOCAL BURN BAN WHICH IS ISSUED BY LOCAL OFFICIALS. && $$
418 WWUS84 KEWX 112026 RFWEWX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 326 PM CDT MON APR 11 2011 ...RED FLAG WARNING HAS BEEN CANCELLED FOR VAL VERDE...EDWARDS... KINNEY AND MAVERICK COUNTIES... ...RED FLAG WARNING CONTINUES THROUGH 8 PM FOR BREEZY AND DRY CONDITIONS ACROSS CENTRAL AND EASTERN PORTIONS OF SOUTH CENTRAL TEXAS... .GUSTY WINDS FROM A SURFACE HIGH PRESSURE RIDGE WILL RELAX FROM WEST TO EAST LATE THIS AFTERNOON AND EARLY THIS EVENING. THE AIR MASS OVER SOUTH CENTRAL TEXAS WILL REMAIN VERY DRY...AND BREEZY CONDITIONS WILL AGAIN BE POSSIBLE OVER THE SOUTHERN EDWARDS PLATEAU TUESDAY AFTERNOON...MAKING FOR ELEVATED TO NEAR CRITICAL FIRE WEATHER CONDITIONS. MOISTURE RECOVERY IS EXPECTED TO BE GOOD TUESDAY NIGHT. TXZ171>173-185>194-203>209-218>225-228-120100- /O.CAN.KEWX.FW.W.0010.000000T0000Z-110412T0100Z/ /O.NEW.KEWX.FW.W.0011.110411T2100Z-110412T0100Z/ LLANO-BURNET-WILLIAMSON-REAL-KERR-BANDERA-GILLESPIE-KENDALL- BLANCO-HAYS-TRAVIS-BASTROP-LEE-UVALDE-MEDINA-BEXAR-COMAL- GUADALUPE-CALDWELL-FAYETTE-ZAVALA-FRIO-ATASCOSA-WILSON-KARNES- GONZALES-DE WITT-LAVACA-DIMMIT- 326 PM CDT MON APR 11 2011 ...RED FLAG WARNING IN EFFECT UNTIL 8 PM CDT THIS EVENING... THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT UNTIL 8 PM CDT THIS EVENING. EXPECT RELATIVE HUMIDITIES IN THE 5 TO 15 PERCENT RANGE LATE THIS AFTERNOON...IMPROVING ONLY SLIGHTLY THIS EVENING. 20-FOOT LEVEL WINDS OF 15 TO 20 MPH WILL GUST TO NEAR 30 MPH THROUGH AROUND 6 PM...WITH WINDS DECREASING FROM WEST TO EAST DURING THE EARLY EVENING HOURS. DRY AIR WILL REMAIN OVER THE REGION THROUGH TUESDAY EVENING...AND MORE BREEZY AND DRY CONDITIONS ARE FORECAST FOR WESTERN PARTS OF SOUTH CENTRAL TEXAS LATE TUESDAY AFTERNOON AND EARLY TUESDAY EVENING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS WEATHER CONDITIONS WILL PROMOTE FIRES THAT ARE DIFFICULT TO CONTROL ACROSS THE WARNED AREA. A RED FLAG WARNING IS COMPLETELY SEPARATE FROM A LOCAL BURN BAN WHICH IS ISSUED BY LOCAL OFFICIALS. && $$ TXZ183-184-202-217-112130- /O.CAN.KEWX.FW.W.0009.000000T0000Z-110411T2100Z/ VAL VERDE-EDWARDS-KINNEY-MAVERICK- 326 PM CDT MON APR 11 2011 ...RED FLAG WARNING IS CANCELLED FOR WESTERN PORTIONS OF SOUTH CENTRAL TEXAS... THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS CANCELLED THE RED FLAG WARNING. EXPECT WINDS OVER THE WESTERN COUNTIES OF SOUTH CENTRAL TEXAS TO CONTINUE TO DIMINISH THIS AFTERNOON AND THIS EVENING. HOWEVER... VERY DRY AIR WILL REMAIN IN PLACE THROUGH AT LEAST TUESDAY EVENING. $$
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, 11:21 AM CDT | Wind Advisory | EWX | Atascosa, Bastrop, Bexar, Blanco, Burnet, Caldwell and 12 more | 10 hr |
Nearby
Red Flag Warnings in Texas, 2011Every red flag 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.