Alert archive / Arizona / Red Flag Warnings in 2021

Red Flag Warning 7, NWS Flagstaff, AZ

April 26, 2021Apache County, Coconino County, Navajo County, Arizona

NWS Flagstaff, AZ issued this red flag warning at Apr 26, 2021, 3:10 AM MST for Apache County, Coconino County, Navajo County, Arizona. It took effect at Apr 26, 2021, 10:00 AM MST. It was in force for 10 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 26, 2021, 3:10 AM MST (10:10 UTC)
In effect from: Apr 26, 2021, 10:00 AM MST
Expired: Apr 26, 2021, 8:00 PM MST
In force: 10 hr
Issued by: NWS Flagstaff, AZ

Counties Apache County, AZ, Coconino County, AZ, Navajo County, AZ

The radar

The Flagstaff radar (KFSX), 124 km from the middle of the area, began a volume at 10:16 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

Flgstf/Belemont, AZ (KFGZ), launched 00:00Z, 10.2 hours before the alert went out and 121 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: 2956 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 102 m²/s²
0-3 km storm-relative helicity: 142 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

043 
WWUS85 KFGZ 261010
RFWFGZ

URGENT - FIRE WEATHER MESSAGE
National Weather Service Flagstaff AZ
310 AM MST Mon Apr 26 2021


AZZ110-111-113-114-117-140-270300-
/O.UPG.KFGZ.FW.A.0006.210426T1700Z-210427T0300Z/
/O.NEW.KFGZ.FW.W.0007.210426T1700Z-210427T0300Z/
Chinle Valley (Fire Weather Zone 110)-
Chuska Mountains and Defiance Plateau (Fire Weather Zone 111)-
Little Colorado River Valley in Navajo County (Fire Weather Zone
113)-
Little Colorado River Valley in Apache County (Fire Weather Zone
114)-White Mountains (Fire Weather Zone 117)-
Northeast Plateaus and Mesas South of Hwy 264 (Fire Weather Zone
140)-
310 AM MST Mon Apr 26 2021

...RED FLAG WARNING IN EFFECT FROM 10 AM THIS MORNING TO 8 PM MST
THIS EVENING DUE TO STRONG WINDS AND LOW RELATIVE HUMIDITY FOR
EASTERN ARIZONA...

The National Weather Service in Flagstaff has issued a Red Flag
Warning due to strong winds and low relative humidity, which is
in effect from 10 AM this morning to 8 PM MST this evening. The
Fire Weather Watch is no longer in effect.

* AFFECTED AREA...Locations near Alpine, Buffalo Pass, Chinle, 
  Dilkon, Eagar-Springerville, Ganado, Holbrook, Kayenta, 
  Kykotsmovi, Pinetop-Lakeside, Saint Johns, Show Low, Snowflake-
   Taylor, Whiteriver, Window Rock and Winslow. This includes 
  portions of the Apache-Sitgreaves National Forest.

* WINDS...Southwest 20 to 30 mph with gusts of 45 to 55 mph.

* RELATIVE HUMIDITY...As low as 10 percent.

* IMPACTS...Any fires that start will have the potential to 
  spread rapidly.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring or are imminent. A combination of strong
winds and low relative humidities can contribute to extreme fire
behavior.

Please notify field crews of this red flag warning.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/flagstaff

2 follow-up statements

641 
WWUS85 KFGZ 261752
RFWFGZ

URGENT - FIRE WEATHER MESSAGE
National Weather Service Flagstaff AZ
1052 AM MST Mon Apr 26 2021

AZZ110-111-113-114-117-140-270300-
/O.CON.KFGZ.FW.W.0007.000000T0000Z-210427T0300Z/
Chinle Valley (Fire Weather Zone 110)-
Chuska Mountains and Defiance Plateau (Fire Weather Zone 111)-
Little Colorado River Valley in Navajo County (Fire Weather Zone
113)-
Little Colorado River Valley in Apache County (Fire Weather Zone
114)-White Mountains (Fire Weather Zone 117)-
Northeast Plateaus and Mesas South of Hwy 264 (Fire Weather Zone
140)-
1052 AM MST Mon Apr 26 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MST (9 PM NAVAJO
NATION) THIS EVENING FOR EASTERN ARIZONA...

* AFFECTED AREA...Locations near Alpine, Buffalo Pass, Chinle,
  Dilkon, Eagar-Springerville, Ganado, Holbrook, Kayenta,
  Kykotsmovi, Pinetop-Lakeside, Saint Johns, Show Low, Snowflake-Taylor,
  Whiteriver, Window Rock and Winslow. This includes portions of 
  the Apache-Sitgreaves National Forest.

* WINDS...Southwest 20 to 30 mph with gusts 45 to 55 mph.

* RELATIVE HUMIDITY...As low as 10 percent.

* IMPACTS...Any fires that start will have the potential to 
  spread rapidly.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring or are imminent. A combination of strong
winds and low relative humidities can contribute to extreme fire
behavior.

Please notify field crews of this red flag warning.

&&

$$

For more information from the National Weather Service visit
http://weather.gov/flagstaff

829 
WWUS85 KFGZ 270234
RFWFGZ

URGENT - FIRE WEATHER MESSAGE
National Weather Service Flagstaff AZ
734 PM MST Mon Apr 26 2021

AZZ110-111-113-114-117-140-270345-
/O.EXP.KFGZ.FW.W.0007.000000T0000Z-210427T0300Z/
Chinle Valley (Fire Weather Zone 110)-
Chuska Mountains and Defiance Plateau (Fire Weather Zone 111)-
Little Colorado River Valley in Navajo County (Fire Weather Zone
113)-
Little Colorado River Valley in Apache County (Fire Weather Zone
114)-White Mountains (Fire Weather Zone 117)-
Northeast Plateaus and Mesas South of Hwy 264 (Fire Weather Zone
140)-
734 PM MST Mon Apr 26 2021

...RED FLAG WARNING WILL EXPIRE AT 8 PM MST THIS EVENING FOR
EASTERN ARIZONA...

The humidity has risen across northern Arizona this evening and
the wind has dropped below 20 MPH across Apache, Navajo, and
Coconino counties this evening. 

$$

For more information from the National Weather Service visit
http://weather.gov/flagstaff

The office that day

Everything else NWS Flagstaff, AZ issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 26, 2:50 AM MST	Wind Advisory	FGZ	Apache, Coconino, Navajo, Yavapai	17 hr

Nearby

Red Flag Warnings in Arizona, 2021 Every red flag warning in 2021

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.