Alert archive / Texas / Red Flag Warnings in 2011

Red Flag Warning 14, NWS Austin/San Antonio, TX

April 16, 20114 counties in Texas

NWS Austin/San Antonio, TX issued this red flag warning at Apr 16, 2011, 4:11 AM CDT for 4 counties in Texas. It took effect at Apr 16, 2011, 12:00 PM CDT. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 16, 2011, 4:11 AM CDT (09:11 UTC)
In effect from: Apr 16, 2011, 12:00 PM CDT
Expired: Apr 16, 2011, 6:00 PM CDT
In force: 6 hr
Issued by: NWS Austin/San Antonio, TX

Counties Edwards County, TX, Kinney County, TX, Maverick County, TX, Val Verde County, TX

The radar

The Laughlin AFB radar (KDFX), 36 km from the middle of the area, began a volume at 09:17 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

Del Rio, TX (KDRT), launched 00:00Z, 9.2 hours before the alert went out and 31 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 5712 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: -52 m²/s²
0-3 km storm-relative helicity: -22 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

033 
WWUS84 KEWX 160911
RFWEWX

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
411 AM CDT SAT APR 16 2011

...RED FLAG WARNING IN EFFECT FOR VAL VERDE...EDWARDS...KINNEY AND 
MAVERICK COUNTIES FROM NOON TO 6 PM TODAY...

.RETURN SOUTHEAST FLOW OF AROUND 20 MPH WILL PREVAIL ACROSS
PORTIONS OF THE EDWARDS PLATEAU...MID RIO GRANDE VALLEY AND PLAINS
THIS AFTERNOON. THESE WINDS...COUPLED WITH VERY LOW RELATIVE
HUMIDITIES...TEENS TO SINGLE DIGITS...WILL CREATE CRITICAL FIRE
WEATHER CONDITIONS. THE CRITICAL FIRE WEATHER CONDITIONS WILL
EXTEND OVER THAT PART OF SOUTH CENTRAL TEXAS GENERALLY WEST OF A
ROCKSPRINGS...BRACKETVILLE...EL INDIO LINE. ELEVATED TO NEAR
CRITICAL FIRE WEATHER CONDITIONS WILL EXTEND FURTHER EAST TO STATE
HIGHWAY 281.

TXZ183-184-202-217-162115-
/O.NEW.KEWX.FW.W.0014.110416T1700Z-110416T2300Z/
VAL VERDE-EDWARDS-KINNEY-MAVERICK-
411 AM CDT SAT APR 16 2011

...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 6 PM CDT THIS
EVENING...

THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A
RED FLAG WARNING...WHICH IS IN EFFECT FROM NOON TODAY TO 6 PM CDT
THIS EVENING. 

RETURN SOUTHEAST FLOW OF AROUND 20 MPH WILL PREVAIL ACROSS
PORTIONS OF THE EDWARDS PLATEAU...MID RIO GRANDE VALLEY AND PLAINS
THIS AFTERNOON. THESE WINDS...COUPLED WITH VERY LOW RELATIVE
HUMIDITIES...TEENS TO SINGLE DIGITS...WILL CREATE CRITICAL FIRE
WEATHER CONDITIONS. THE CRITICAL FIRE WEATHER CONDITIONS WILL
EXTEND OVER THAT PART OF SOUTH CENTRAL TEXAS GENERALLY WEST OF A
ROCKSPRINGS...BRACKETVILLE...EL INDIO LINE. ELEVATED TO NEAR
CRITICAL FIRE WEATHER CONDITIONS WILL EXTEND FURTHER EAST TO STATE
HIGHWAY 281.

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.

&&

$$

1 follow-up statement

259 
WWUS84 KEWX 162002
RFWEWX

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
302 PM CDT SAT APR 16 2011

...RED FLAG WARNING IN EFFECT FOR VAL VERDE...EDWARDS...KINNEY
AND MAVERICK COUNTIES UNTIL 6 PM TODAY...

.RETURN SOUTHEAST FLOW OF AROUND 20 MPH WILL PREVAIL ACROSS
PORTIONS OF THE EDWARDS PLATEAU...MID RIO GRANDE VALLEY AND
PLAINS THIS AFTERNOON. THESE WINDS...COUPLED WITH VERY LOW
RELATIVE HUMIDITIES...TEENS TO SINGLE DIGITS...WILL CREATE
CRITICAL FIRE WEATHER CONDITIONS. THE CRITICAL FIRE WEATHER
CONDITIONS WILL EXTEND OVER THAT PART OF SOUTH CENTRAL TEXAS
GENERALLY WEST OF A ROCKSPRINGS...BRACKETVILLE...EL INDIO LINE.
ELEVATED TO NEAR CRITICAL FIRE WEATHER CONDITIONS WILL EXTEND
FURTHER EAST TO STATE HIGHWAY 281.

TXZ183-184-202-217-162300-
/O.CON.KEWX.FW.W.0014.000000T0000Z-110416T2300Z/
VAL VERDE-EDWARDS-KINNEY-MAVERICK-
302 PM CDT SAT APR 16 2011

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM CDT THIS
EVENING...

RETURN SOUTHEAST FLOW OF AROUND 20 MPH WILL PREVAIL ACROSS
PORTIONS OF THE EDWARDS PLATEAU...MID RIO GRANDE VALLEY AND
PLAINS THIS AFTERNOON. THESE WINDS...COUPLED WITH VERY LOW
RELATIVE HUMIDITIES...TEENS TO SINGLE DIGITS...WILL CREATE
CRITICAL FIRE WEATHER CONDITIONS. THE CRITICAL FIRE WEATHER
CONDITIONS WILL EXTEND OVER THAT PART OF SOUTH CENTRAL TEXAS
GENERALLY WEST OF A ROCKSPRINGS...BRACKETVILLE...EL INDIO LINE.
ELEVATED TO NEAR CRITICAL FIRE WEATHER CONDITIONS WILL EXTEND
FURTHER EAST TO STATE HIGHWAY 281.

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.

&&

$$

Nearby

Red Flag Warnings in Texas, 2011 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.