Alert archive / Texas / Red Flag Warnings in 2017

Red Flag Warning 2, NWS Austin/San Antonio, TX

January 25, 20177 counties in Texas

NWS Austin/San Antonio, TX issued this red flag warning at Jan 25, 2017, 3:24 AM CST for 7 counties in Texas. It took effect at Jan 25, 2017, 11:00 AM CST. It was in force for 5 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
Jan 25, 2017, 3:24 AM CST (09:24 UTC)
In effect from
Jan 25, 2017, 11:00 AM CST
Expired
Jan 25, 2017, 4:00 PM CST
In force
5 hr
Issued by
NWS Austin/San Antonio, TX

Counties Dimmit County, TX, Frio County, TX, Kinney County, TX, Maverick County, TX, Medina County, TX, Uvalde County, TX, Zavala County, TX

The radar

The Laughlin AFB radar (KDFX), 60 km from the middle of the area, began a volume at 09:25 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, 9.4 hours before the alert went out and 114 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 2017-01-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2017-01-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 135 square meters per square second.1939587897117136Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3380 m above ground
0-6 km bulk shear
69 kt
0-1 km storm-relative helicity
135 m²/s²
0-3 km storm-relative helicity
194 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

013 
WWUS84 KEWX 250924
RFWEWX

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
324 AM CST WED JAN 25 2017

...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING THROUGH 4 PM
CST THIS AFTERNOON FOR PARTS OF THE RIO GRANDE PLAINS IN SOUTH 
CENTRAL TEXAS DUE TO LOW HUMIDITY WITH STRONG NORTHWEST WINDS...

.LOW RELATIVE HUMIDITY VALUES AND GUSTY NORTH TO NORTHWEST WINDS
BEHIND A DRY COLD FRONT WILL PRODUCE LOCALLY CRITICAL FIRE WEATHER
CONDITIONS ACROSS PORTIONS OF THE RIO GRANDE PLAINS. RAPID FIRE 
GROWTH AND SPREAD WILL LIKELY OCCUR IN CURED FUELS....SUCH AS DRY
GRASSES. WINDS WILL INITIALLY BE OUT OF THE NORTHWEST AT 10 TO 20
MPH WITH GUSTS TO NEAR 25 MPH THIS MORNING BEFORE BECOMING MORE 
NORTHERLY AS THEY WEAKEN THIS AFTERNOON. RELATIVE HUMIDITY VALUES
SHOULD FALL BELOW 20 PERCENT LATE THIS MORNING AND REMAIN BELOW 
THOSE LEVELS UNTIL AROUND SUNSET...BUT WINDS SHOULD WEAKEN TO 
HELP DECREASE FIRE SPREAD CONCERNS BY 4 PM THIS AFTERNOON.


TXZ202>204-217>219-228-252200-
/O.NEW.KEWX.FW.W.0002.170125T1700Z-170125T2200Z/
KINNEY-UVALDE-MEDINA-MAVERICK-ZAVALA-FRIO-DIMMIT-
324 AM CST WED JAN 25 2017

...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 4 PM CST
THIS AFTERNOON FOR LOW HUMIDITY WITH STRONG NORTHWEST WINDS...

THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A
RED FLAG WARNING, WHICH IS IN EFFECT FROM 11 AM THIS MORNING TO
4 PM CST THIS AFTERNOON. 

* AFFECTED AREA...PORTIONS OF THE RIO GRANDE PLAINS SOUTH AND WEST
  OF A LINE FROM DEL RIO TO HONDO TO DILLEY. 

* WIND...NORTH TO NORTHWEST 10 TO 20 MPH WITH GUSTS NEAR 25 MPH.

* HUMIDITY...MINIMUM AFTERNOON HUMIDITY VALUES RANGING FROM 15 TO
  20 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.

&&

$$

Nearby

Red Flag Warnings in Texas, 2017Every red flag warning in 2017

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.