Alert archive / Arizona / Red Flag Warnings in 2021

Red Flag Warning 1, NWS Flagstaff, AZ

March 2, 2021Yavapai County, Arizona

NWS Flagstaff, AZ issued this red flag warning at Mar 2, 2021, 2:08 PM MST for Yavapai County, Arizona. It took effect at Mar 3, 2021, 11:00 AM MST. It was in force for 7 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
Mar 2, 2021, 2:08 PM MST (21:08 UTC)
In effect from
Mar 3, 2021, 11:00 AM MST
Expired
Mar 3, 2021, 6:00 PM MST
In force
7 hr
Issued by
NWS Flagstaff, AZ

County Yavapai County, AZ

The radar

The Flagstaff radar (KFSX), 124 km from the middle of the area, began a volume at 21:10 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 12:00Z, 9.1 hours before the alert went out and 98 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, Flgstf/Belemont, AZ at 12:00Z on 2021-03-02Temperature 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 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Flgstf/Belemont, AZ at 12:00Z on 2021-03-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 square meters per square second.1939Sfc1 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
3301 m above ground
0-6 km bulk shear
0 kt
0-1 km storm-relative helicity
0 m²/s²
0-3 km storm-relative helicity
0 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

853 
WWUS85 KFGZ 022108
RFWFGZ

URGENT - FIRE WEATHER MESSAGE
National Weather Service Flagstaff AZ
208 PM MST Tue Mar 2 2021

AZZ137-031800-
/O.NEW.KFGZ.FW.W.0001.210303T1800Z-210304T0100Z/
Yavapai County Valleys and Basins (Fire Weather Zone 137)-
208 PM MST Tue Mar 2 2021

...RED FLAG WARNING IN EFFECT FROM 11 AM TO 6 PM MST WEDNESDAY
DUE TO STRONG WINDS AND LOW RELATIVE HUMIDITY FOR THE VALLEYS OF
YAVAPAI COUNTY...

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 11 AM to 6 PM MST Wednesday.

* AFFECTED AREA...Locations near Camp Verde, Chino Valley, 
  Congress, Cottonwood and Paulden. This includes portions of 
  the Coconino National Forest, Prescott National Forest and 
  Tonto National Forest.

* WINDS...South 15 to 20 mph with gusts from 35 to 40 mph.

* RELATIVE HUMIDITY...As low as 12 percent.

* IMPACTS...Any fires that develop will 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
023 
WWUS85 KFGZ 030916
RFWFGZ

URGENT - FIRE WEATHER MESSAGE
National Weather Service Flagstaff AZ
216 AM MST Wed Mar 3 2021

AZZ137-040100-
/O.CON.KFGZ.FW.W.0001.210303T1800Z-210304T0100Z/
Yavapai County Valleys and Basins (Fire Weather Zone 137)-
216 AM MST Wed Mar 3 2021

...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO
6 PM MST THIS EVENING DUE TO STRONG WINDS AND LOW RELATIVE
HUMIDITY FOR THE VALLEYS OF YAVAPAI COUNTY...

* AFFECTED AREA...Locations near Camp Verde, Chino Valley, 
  Congress, Cottonwood and Paulden. This includes portions of 
  the Coconino National Forest, Prescott National Forest and 
  Tonto National Forest.

* WINDS...South 20 to 25 mph with gusts 35 to 45 mph.

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

* IMPACTS...Any fires that develop will 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
581 
WWUS85 KFGZ 040056
RFWFGZ

URGENT - FIRE WEATHER MESSAGE
National Weather Service Flagstaff AZ
556 PM MST Wed Mar 3 2021


AZZ137-040200-
/O.EXP.KFGZ.FW.W.0001.000000T0000Z-210304T0100Z/
Yavapai County Valleys and Basins (Fire Weather Zone 137)-
556 PM MST Wed Mar 3 2021

...RED FLAG WARNING WILL EXPIRE AT 6 PM MST THIS EVENING FOR THE
VALLEYS OF YAVAPAI COUNTY...

Winds have begun to subside and relative humidity is rising. This
trend is expected to continue after sunset as moisture moves into
the area 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.

IssuedProductOfficeCountiesLasted
Mar 2, 2:01 PM MSTWind AdvisoryFGZCoconino, Yavapai28 hr

Nearby

Red Flag Warnings in Arizona, 2021Every 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.