Alert archive / Texas / Red Flag Warnings in 2018

Red Flag Warning 3, NWS Austin/San Antonio, TX

April 14, 201826 counties in Texas

NWS Austin/San Antonio, TX issued this red flag warning at Apr 14, 2018, 3:40 AM CDT for 26 counties in Texas. It took effect at Apr 14, 2018, 11:00 AM CDT. It was in force for 8 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 14, 2018, 3:40 AM CDT (08:40 UTC)
In effect from
Apr 14, 2018, 11:00 AM CDT
Expired
Apr 14, 2018, 7:00 PM CDT
In force
8 hr
Issued by
NWS Austin/San Antonio, TX
All 26 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, Dimmit County, TX, Edwards County, TX, Frio County, TX, Gillespie County, TX, Guadalupe 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), 89 km from the middle of the area, began a volume at 08:43 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 (KDLF), launched 00:00Z, 8.7 hours before the alert went out and 188 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 2018-04-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 684 joules per kilogram.LCLEL10008507005003002001001 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 2018-04-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 square meters per square second.1939587897Sfc1 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
684 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
3291 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
7 m²/s²
0-3 km storm-relative helicity
50 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

The text

As transmitted.

301 
WWUS84 KEWX 140840
RFWEWX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Austin/San Antonio TX
340 AM CDT Sat Apr 14 2018

...A Red Flag Warning has been issued for areas along and west of
the Interstate 35 corridor due to low relative humidities values
and strong north winds Saturday morning through Saturday evening...

.Strong north winds will develop behind the front on Saturday, 
with drier air filtering into the rest of the region. Wind gusts 
to around 30 mph with minimum RH values in the teens to 20s will 
result in critical fire weather conditions for parts of South
Central Texas along and west of the Interstate 35 corridor.

Dry and warmer conditions for Sunday through Tuesday, and a 
breezy southerly wind could lead to elevated to near critical fire
weather conditions continuing in some areas.

TXZ171>173-183>192-202>206-217>220-228-141645-
/O.UPG.KEWX.FW.A.0004.180414T1600Z-180415T0000Z/
/O.NEW.KEWX.FW.W.0003.180414T1600Z-180415T0000Z/
Llano-Burnet-Williamson-Val Verde-Edwards-Real-Kerr-Bandera-
Gillespie-Kendall-Blanco-Hays-Travis-Kinney-Uvalde-Medina-Bexar-
Comal-Maverick-Zavala-Frio-Atascosa-Dimmit-
340 AM CDT Sat Apr 14 2018

...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 7 PM CDT
THIS EVENING FOR WINDY AND DRY CONDITIONS BEHIND A COLD FRONT FOR
AREAS ALONG AND WEST OF A TAYLOR TO SCHERTZ TO CAMPBELLTON LINE...

The National Weather Service in Austin/San Antonio has issued a
Red Flag Warning, which is in effect from 11 AM this morning to
7 PM CDT this evening. The Fire Weather Watch is no longer in
effect. 

* WIND...North winds of 15 to 25 mph with gusts up to 35 mph.

* HUMIDITY...10 to 25 percent.

* 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. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.

&&

$$

TXZ193-207-208-141645-
/O.NEW.KEWX.FW.W.0003.180414T1600Z-180415T0000Z/
Bastrop-Guadalupe-Caldwell-
340 AM CDT Sat Apr 14 2018

...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 7 PM CDT
THIS EVENING FOR WINDY AND DRY CONDITIONS BEHIND A FRONT FROM A
SEGUIN TO LOCKHART TO BASTROP LINE AND POINTS WESTWARD...

The National Weather Service in Austin/San Antonio has issued a
Red Flag Warning, which is in effect from 11 AM this morning to
7 PM CDT this evening. 

* AFFECTED AREA...Bastrop...Guadalupe...and Caldwell counties to
  the east of I-35. 

* WIND...North winds of 15 to 25 mph with gusts up to 35 mph. 

* HUMIDITY...15 to 30 percent.

* 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. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.

&&

$$
1 follow-up statement
005 
WWUS84 KEWX 141554
RFWEWX

URGENT - FIRE WEATHER MESSAGE
National Weather Service Austin/San Antonio TX
1054 AM CDT Sat Apr 14 2018

...A Red Flag Warning has been issued for areas near and west of 
the Interstate 35 corridor due to low relative humidities values 
and strong north winds through this evening...

.Strong north winds are developing in the wake of last night's
cold front along with drier air filtering into the region. Wind 
gusts between 25 and 35 mph with minimum RH values in the teens to
20s will result in critical fire weather conditions for parts of 
South Central Texas near and west of the Interstate 35 corridor.

TXZ171>173-183>193-202>208-217>220-228-150000-
/O.CON.KEWX.FW.W.0003.180414T1600Z-180415T0000Z/
Llano-Burnet-Williamson-Val Verde-Edwards-Real-Kerr-Bandera-
Gillespie-Kendall-Blanco-Hays-Travis-Bastrop-Kinney-Uvalde-Medina-
Bexar-Comal-Guadalupe-Caldwell-Maverick-Zavala-Frio-Atascosa-
Dimmit-
1054 AM CDT Sat Apr 14 2018

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING
FOR WINDY AND DRY CONDITIONS NEAR AND WEST OF I-35 CORRIDOR...

* WIND...North winds of 15 to 25 mph with gusts up to 35 mph.

* HUMIDITY...10 to 25 percent.

* 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. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior. Outdoor burning is not 
recommended. Avoid outdoor activities that could inadvertently 
cause wildfires. Report wildfires quickly to the nearest fire 
department or law enforcement office. 

&&

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 13, 7:14 PM CDTSpecial Weather StatementEWXBurnet46 min
Apr 13, 8:01 PM CDTSpecial Weather StatementEWXBurnet59 min
Apr 13, 8:17 PM CDTSevere Thunderstorm WarningEWXBurnet43 min
Apr 13, 8:37 PM CDTSpecial Weather StatementEWXGillespie, Llano38 min
Apr 13, 8:58 PM CDTSpecial Weather StatementEWXWilliamson47 min
Apr 13, 9:21 PM CDTSpecial Weather StatementEWXBurnet54 min
Apr 13, 9:34 PM CDTSevere Thunderstorm WarningEWXBlanco, Burnet, Llano, Travis, Williamson21 min
Apr 13, 9:39 PM CDTSpecial Weather StatementEWXWilliamson51 min
Apr 13, 10:05 PM CDTSpecial Weather StatementEWXWilliamson25 min
Apr 13, 10:21 PM CDTSpecial Weather StatementEWXMedina39 min
Apr 13, 10:24 PM CDTSpecial Weather StatementEWXWilliamson51 min
Apr 13, 10:39 PM CDTSpecial Weather StatementEWXBastrop, Lee, Travis51 min
Apr 13, 10:45 PM CDTSpecial Weather StatementEWXMedina45 min
Apr 13, 10:55 PM CDTSevere Thunderstorm WarningEWXBastrop, Fayette, Lee50 min
Apr 13, 11:03 PM CDTSevere Thunderstorm WarningEWXMedina57 min
Apr 13, 11:07 PM CDTSpecial Weather StatementEWXBexar53 min
Apr 13, 11:38 PM CDTSpecial Weather StatementEWXGuadalupe52 min
Apr 13, 11:51 PM CDTSevere Thunderstorm WarningEWXBexar, Guadalupe, Wilson39 min
Apr 14, 12:04 AM CDTSevere Thunderstorm WarningEWXAtascosa, Bexar, Dimmit, Frio, Karnes, Wilson41 min
Apr 14, 12:07 AM CDTSpecial Weather StatementEWXFayette, Gonzales53 min
Apr 14, 12:49 AM CDTSpecial Weather StatementEWXAtascosa, DeWitt, Karnes, Lavaca, Wilson56 min

Nearby

Red Flag Warnings in Texas, 2018Every red flag warning in 2018

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.