Alert archive / Texas / Red Flag Warnings in 2011

Red Flag Warning 20, NWS Austin/San Antonio, TX

June 19, 201123 counties in Texas

NWS Austin/San Antonio, TX issued this red flag warning at Jun 19, 2011, 4:42 AM CDT for 23 counties in Texas. It took effect at Jun 19, 2011, 1:00 PM CDT. It was in force for 7 hr. 1 report 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
Jun 19, 2011, 4:42 AM CDT (09:42 UTC)
In effect from
Jun 19, 2011, 1:00 PM CDT
Expired
Jun 19, 2011, 8:00 PM CDT
In force
7 hr
Issued by
NWS Austin/San Antonio, TX
All 23 counties

Atascosa County, TX, Bandera County, TX, Bexar County, TX, Blanco County, TX, Burnet County, TX, Comal County, TX, Dimmit County, TX, Edwards County, TX, Frio County, TX, Gillespie County, TX, Hays County, TX, Kendall County, TX, Kerr County, TX, Kinney County, TX, Llano County, TX, Maverick County, TX, Medina County, TX, Real County, TX, Travis County, TX, Uvalde County, TX, Val Verde County, TX, Williamson County, TX, Zavala County, TX

The radar

The Austin/San Antonio radar (KEWX), 105 km from the middle of the area, began a volume at 09:44 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

TimeReportWhereRemark
Jun 19, 4:00 PM CDTWILDFIRE 150Boerne, TXPORTIONS OF I-10 NEAR BOERNE WERE TEMPORARILY SHUT DOWN AND EVACUATIONS WERE ORDERED. FIRE IS COMPLETELY CONTAINED. NO OFFICIAL REPORTS ON INJURIES AND OR STRUCTURE DAMAGE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 9.7 hours before the alert went out and 171 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.

Skew-T log-pSkew-T log-p diagram, Del Rio, TX at 00:00Z on 2011-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 758 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Del Rio, TX at 00:00Z on 2011-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 26 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
758 J/kg
Mixed-layer CIN
-164 J/kg
Mixed-layer LCL
3141 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
26 m²/s²
0-3 km storm-relative helicity
76 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

035 
WWUS84 KEWX 190942
RFWEWX

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
442 AM CDT SUN JUN 19 2011

...A RED FLAG WARNING IS IN EFFECT THIS AFTERNOON AND EARLY THIS
EVENING FOR THE WESTERN TWO-THIRDS OF SOUTH CENTRAL TEXAS DUE TO
LOW RELATIVE HUMIDITIES AND STRONG SOUTHERLY WINDS...

.CRITICAL FIRE WEATHER CONDITIONS ARE EXPECTED TO DEVELOP THIS
AFTERNOON...MAINLY ALONG AND WEST OF A GEORGETOWN TO NEW BRAUNFELS
TO JOURDANTON LINE. AFTERNOON RELATIVE HUMIDITY VALUES ARE
EXPECTED FALL INTO THE 15 TO 20 PERCENT RANGE...WHILE 20-FOOT LEVEL
WINDS OCCASIONALLY BECOME SUSTAINED AT 15 TO 20 MPH. HUMIDITY VALUES
ARE EXPECTED TO INCREASE BY 8 PM...WITH GOOD RECOVERIES TO NEAR OR
ABOVE 70 PERCENT BY MONDAY MORNING. HOWEVER...BREEZY CONDITIONS
WILL CONTINUE THROUGH MONDAY EVENING...AND ANOTHER DRY AFTERNOON
IS EXPECTED TO RESULT IN NEAR CRITICAL FIRE WEATHER CONDITIONS FOR
MUCH OF THE AREA AGAIN MONDAY AFTERNOON. 

TXZ171>173-183>192-202>206-217>220-228-200100-
/O.NEW.KEWX.FW.W.0020.110619T1800Z-110620T0100Z/
LLANO-BURNET-WILLIAMSON-VAL VERDE-EDWARDS-REAL-KERR-BANDERA-
GILLESPIE-KENDALL-BLANCO-HAYS-TRAVIS-KINNEY-UVALDE-MEDINA-BEXAR-
COMAL-MAVERICK-ZAVALA-FRIO-ATASCOSA-DIMMIT-
442 AM CDT SUN JUN 19 2011

...RED FLAG WARNING IN EFFECT FROM 1 PM THIS AFTERNOON TO 8 PM
CDT THIS EVENING FOR STRONG WINDS AND LOW RELATIVE HUMIDITIES
ACROSS WESTERN AND CENTRAL PORTIONS OF SOUTH CENTRAL TEXAS...

THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A
RED FLAG WARNING...WHICH IS IN EFFECT FROM 1 PM THIS AFTERNOON TO
8 PM CDT THIS EVENING. 

* AFFECTED AREA...THE FOLLOWING SOUTH CENTRAL TEXAS COUNTIES... 
  LLANO...BURNET...WILLIAMSON...VAL VERDE...EDWARDS...REAL... 
  KERR...BANDERA...GILLESPIE...KENDALL...BLANCO...HAYS... 
  TRAVIS...KINNEY...UVALDE...MEDINA...BEXAR...COMAL... 
  MAVERICK...ZAVALA...FRIO...ATASCOSA...DIMMIT. 

* 20-FOOT WIND...SOUTH TO SOUTHEAST AT 15 TO 20 MPH WITH GUSTS TO
  30 MPH.

* HUMIDITY...EXPECT AFTERNOON AND EARLY EVENING RELATIVE HUMIDITY
  VALUES OF 15 TO 20 PERCENT...WITH DRIEST AIR NEAR THE RIO GRANDE.

* THUNDERSTORMS...AN ISOLATED THUNDERSTORM OR TWO COULD DEVELOP
  WEST OF AMISTAD RESERVOIR THIS EVENING...GUSTY WINDS AND LITTLE
  RAINFALL WOULD BE EXPECTED IF STORMS DEVELOP OVER THIS AREA.

* IMPACTS...ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY. 
  OUTDOOR BURNING IS NOT RECOMMENDED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE EITHER OCCURRING NOW...OR WILL SHORTLY.  AVOID THE USE OF
OPEN FLAMES OR ANY ACTIVITIES THAN MAY GENERATE SPARKS. 
ACCIDENTAL IGNITIONS WILL HAVE THE POTENTIAL TO GROW QUICKLY INTO
DANGEROUS WIND DRIVEN WILDFIRES.

&&

$$


FOR INFORMATION ON BURN BANS PLEASE VISIT THE TEXAS INTERAGENCY
COORDINATION CENTER WEBSITE AT: TICC.TAMU.EDU

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 19, 4:40 AM CDTHeat AdvisoryEWXAtascosa, Bastrop, Bexar, Caldwell, Comal, DeWitt and 18 more38 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.