Alert archive / Texas / Red Flag Warnings in 2017

Red Flag Warning 4, NWS Brownsville, TX

April 5, 20175 counties in Texas

NWS Brownsville, TX issued this red flag warning at Apr 5, 2017, 5:05 AM CDT for 5 counties in Texas. It took effect at Apr 5, 2017, 1:00 PM CDT. 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
Apr 5, 2017, 5:05 AM CDT (10:05 UTC)
In effect from
Apr 5, 2017, 1:00 PM CDT
Expired
Apr 5, 2017, 6:00 PM CDT
In force
5 hr
Issued by
NWS Brownsville, TX

Counties Brooks County, TX, Hidalgo County, TX, Jim Hogg County, TX, Starr County, TX, Zapata County, TX

The radar

The Corpus Christi radar (KCRP), 153 km from the middle of the area, began a volume at 10:09 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

Brownsville Intl, TX (KBRO), launched 00:00Z, 10.1 hours before the alert went out and 156 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, Brownsville Intl, TX at 00:00Z on 2017-04-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1165 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, Brownsville Intl, TX at 00:00Z on 2017-04-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -21 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
1165 J/kg
Mixed-layer CIN
-356 J/kg
Mixed-layer LCL
1672 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
-21 m²/s²
0-3 km storm-relative helicity
14 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

837 
WWUS84 KBRO 051005
RFWBRO

URGENT - FIRE WEATHER MESSAGE
National Weather Service Brownsville TX
505 AM CDT Wed Apr 5 2017

...CRITICAL FIRE WEATHER CONDITIONS EXPECTED OVER WESTERN PORTIONS
OF DEEP SOUTH TEXAS TODAY...

.A COLD FRONT WILL MOVE THROUGH DEEP SOUTH TEXAS EARLY THIS 
MORNING. STRONG NORTHERLY WINDS BEHIND THE FRONT WILL USHER IN 
MUCH DRIER AIR BY MID-DAY. WITH DRY FUELS EXPECTED OVER MOST OF 
THE AREA...THIS COMBINATION IS EXPECTED TO PRODUCE CRITICAL FIRE 
WEATHER CONDITIONS THIS AFTERNOON FOR THE WESTERN ZONES.

TXZ250-251-254-255-051115-
/O.CAN.KBRO.FW.A.0004.170405T1700Z-170406T0100Z/
Brooks-Kenedy-Inland Willacy-Inland Cameron-
505 AM CDT Wed Apr 5 2017

...FIRE WEATHER WATCH IS CANCELLED FOR STRONG WINDS AND LOW
HUMIDITY FOR FIRE WEATHER ZONES 250, 251, 254, AND 255...

The National Weather Service in Brownsville has cancelled the
Fire Weather Watch. 

Although fuels are expected to remain dry, the winds and relative
humidity values will not reach Red Flag Warning criteria
concurrently. There will still be a threat of erratic fire
behavior in Brooks County.

$$

TXZ248-249-252-253-051815-
/O.UPG.KBRO.FW.A.0004.170405T1700Z-170406T0100Z/
/O.NEW.KBRO.FW.W.0004.170405T1800Z-170405T2300Z/
Zapata-Jim Hogg-Starr-Hidalgo-
505 AM CDT Wed Apr 5 2017

...RED FLAG WARNING IN EFFECT FROM 1 PM THIS AFTERNOON TO 6 PM
CDT THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY FOR FIRE 
WEATHER ZONES 248, 249, 252, AND 253...

The National Weather Service in Brownsville has issued a Red Flag
Warning, which is in effect from 1 PM this afternoon to 6 PM CDT
this evening. The Fire Weather Watch is no longer in effect. 

* WIND...20-FOOT WINDS FROM 15 TO 20 MPH THIS AFTERNOON.

* HUMIDITY...15 TO 20 PERCENT.

* THUNDERSTORMS...NONE.

* HIGHEST THREAT...IS LOCATED ACROSS THE MIDDLE AND UPPER 
  PORTIONS OF THE RIO GRANDE VALLEY...INCLUDING THE NORTHWEST 
  RANCHLANDS...WHERE RELATIVE HUMIDITY VALUES WILL BE LOWEST.

* IMPACTS...ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY. 
  OUTDOOR BURNING IS NOT RECOMMENDED. AVOID CONTACT BETWEEN HOT 
  OBJECTS AND GRASSES...WHICH CAN BURN HOT AND QUICKLY.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means critical fire weather conditions are
occurring now...or will shortly. In general...these conditions
include sustained 20 foot winds of 25 MPH or greater...humidity
ranging from below 25 percent in Zapata County to below
45 percent along the coast...each lasting for 2 hours or longer...
and cured fuels. Humidity below 25 percent in most areas will
trigger fire danger at lower wind speeds. Detailed decision
tables are found at HTTP://WEATHER.GOV/RGV/?N=MAPCOLORS#FIRE.

&&

$$

53
2 follow-up statements
389 
WWUS84 KBRO 051608
RFWBRO

URGENT - FIRE WEATHER MESSAGE
National Weather Service Brownsville TX
1108 AM CDT Wed Apr 5 2017

...CRITICAL FIRE WEATHER CONDITIONS EXPECTED OVER WESTERN
PORTIONS OF DEEP SOUTH TEXAS TODAY...

.A COLD FRONT WILL MOVE THROUGH DEEP SOUTH TEXAS EARLY THIS
MORNING. STRONG NORTHERLY WINDS BEHIND THE FRONT WILL USHER IN
MUCH DRIER AIR BY MID-DAY. WITH DRY FUELS EXPECTED OVER MOST OF
THE AREA...THIS COMBINATION IS EXPECTED TO PRODUCE CRITICAL FIRE
WEATHER CONDITIONS THIS AFTERNOON FOR THE WESTERN ZONES.

TXZ250-052300-
/O.EXA.KBRO.FW.W.0004.170405T1800Z-170405T2300Z/
Brooks-
1108 AM CDT Wed Apr 5 2017

...RED FLAG WARNING IN EFFECT UNTIL 6 PM CDT THIS EVENING FOR
STRONG WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 248, 249,
252, AND 253...

The National Weather Service in Brownsville has issued a Red Flag
Warning, which is in effect until 6 PM CDT this evening. 

* WIND...20-FOOT WINDS FROM 15 TO 20 MPH THIS AFTERNOON.

* HUMIDITY...15 TO 20 PERCENT.

* THUNDERSTORMS...NONE.

* HIGHEST THREAT...IS LOCATED ACROSS THE MIDDLE AND UPPER 
  PORTIONS OF THE RIO GRANDE VALLEY...INCLUDING THE NORTHWEST 
  RANCHLANDS...WHERE RELATIVE HUMIDITY VALUES WILL BE LOWEST.

* IMPACTS...ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY. 
  OUTDOOR BURNING IS NOT RECOMMENDED. AVOID CONTACT BETWEEN HOT 
  OBJECTS AND GRASSES...WHICH CAN BURN HOT AND QUICKLY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means critical fire weather conditions are
occurring now...or will shortly. In general...these conditions
include sustained 20 foot winds of 25 MPH or greater...humidity
ranging from below 25 percent in Zapata County to below
45 percent along the coast...each lasting for 2 hours or longer...
 and cured fuels. Humidity below 25 percent in most areas will
trigger fire danger at lower wind speeds. Detailed decision
tables are found at HTTP://WEATHER.GOV/RGV/?N=MAPCOLORS#FIRE.

&&

$$

TXZ248-249-252-253-052300-
/O.CON.KBRO.FW.W.0004.170405T1800Z-170405T2300Z/
Zapata-Jim Hogg-Starr-Hidalgo-
1108 AM CDT Wed Apr 5 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM CDT THIS EVENING
FOR STRONG WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 248,
249, 252, AND 253...

* WIND...20-FOOT WINDS FROM 15 TO 20 MPH THIS AFTERNOON.

* HUMIDITY...15 TO 20 PERCENT.

* THUNDERSTORMS...NONE.

* HIGHEST THREAT...IS LOCATED ACROSS THE MIDDLE AND UPPER 
  PORTIONS OF THE RIO GRANDE VALLEY...INCLUDING THE NORTHWEST 
  RANCHLANDS...WHERE RELATIVE HUMIDITY VALUES WILL BE LOWEST.

* IMPACTS...ANY FIRES THAT DEVELOP WILL LIKELY SPREAD RAPIDLY. 
  OUTDOOR BURNING IS NOT RECOMMENDED. AVOID CONTACT BETWEEN HOT 
  OBJECTS AND GRASSES...WHICH CAN BURN HOT AND QUICKLY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means critical fire weather conditions are
occurring now...or will shortly. In general...these conditions
include sustained 20 foot winds of 25 MPH or greater...humidity
ranging from below 25 percent in Zapata County to below
45 percent along the coast...each lasting for 2 hours or longer...
 and cured fuels. Humidity below 25 percent in most areas will
trigger fire danger at lower wind speeds. Detailed decision
tables are found at HTTP://WEATHER.GOV/RGV/?N=MAPCOLORS#FIRE.

&&

$$

CASTILLO
775 
WWUS84 KBRO 052328
RFWBRO

URGENT - FIRE WEATHER MESSAGE
National Weather Service Brownsville TX
628 PM CDT Wed Apr 5 2017

...WINDS ARE DECREASING AND HUMIDITY VALUES WILL RECOVER...

.HIGH PRESSURE WILL BUILD INTO THE REGION THIS EVENING WITH WINDS
EXPECTED TO DECREASE MORE TONIGHT ESPECIALLY AFTER SUNSET.
MEANWHILE, RELATIVE HUMIDITY VALUES WILL INCREASE OVERNIGHT. 


TXZ248>250-252-253-060030-
/O.EXP.KBRO.FW.W.0004.000000T0000Z-170405T2300Z/
Zapata-Jim Hogg-Brooks-Starr-Hidalgo-
628 PM CDT Wed Apr 5 2017

...RED FLAG WARNING HAS EXPIRED FOR STRONG WINDS AND LOW HUMIDITY
FOR FIRE WEATHER ZONES 248, 249, 252, AND 253...

THE COMBINATION OF LIGHTER WINDS AND SLOWLY INCREASING RELATIVE 
HUMIDITY VALUES WILL RESULT IN A LOW RISK OF WILDFIRE DANGER AND 
SPREAD THROUGH THE OVERNIGHT HOURS. THERE COULD STILL BE AN
ELEVATED RISK OF ERRATIC FIRE BEHAVIOR ACROSS BROOKS AND HIDALGO 
COUNTIES THROUGH SUNSET.

$$

The office that day

Everything else NWS Brownsville, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 5, 4:44 AM CDTGale WarningBRO8 hr
Apr 5, 4:44 AM CDTSmall Craft AdvisoryBRO23 hr
Apr 5, 4:44 AM CDTSmall Craft Advisory for WindsBRO14 hr
Apr 5, 4:50 AM CDTWind AdvisoryBROKenedy8 hr

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.