Alert archive / Arizona / Red Flag Warnings in 2021
Red Flag Warning 2, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this red flag warning at Apr 4, 2021, 12:57 PM MST for Apache County, Coconino County, Navajo County, Arizona. It took effect at Apr 5, 2021, 12:00 PM 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
- Apr 4, 2021, 12:57 PM MST (19:57 UTC)
- In effect from
- Apr 5, 2021, 12:00 PM MST
- Expired
- Apr 5, 2021, 7:00 PM MST
- In force
- 7 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 19:57 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, 8.0 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2862 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 17 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
678 WWUS85 KFGZ 041957 RFWFGZ URGENT - FIRE WEATHER MESSAGE National Weather Service Flagstaff AZ 1257 PM MST Sun Apr 4 2021 AZZ110-111-113-114-116-140-051200- /O.UPG.KFGZ.FW.A.0001.210405T1900Z-210406T0200Z/ /O.NEW.KFGZ.FW.W.0002.210405T1900Z-210406T0200Z/ 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)-Eastern Mogollon Rim (Fire Weather Zone 116)- Northeast Plateaus and Mesas South of Hwy 264 (Fire Weather Zone 140)- 1257 PM MST Sun Apr 4 2021 ...RED FLAG WARNING IN EFFECT FROM MONDAY AFTERNOON THROUGH MONDAY EVENING DUE TO STRONG WINDS AND LOW RELATIVE HUMIDITY FOR FAR SOUTHEASTERN COCONINO COUNTY AND MUCH OF NAVAJO AND APACHE COUNTIES... 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 Monday afternoon through Monday evening. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Far southeastern Coconino County and much of Navajo and Apache counties, except for the Black Mesa. * WINDS...Southwest 15 to 25 mph with gusts from 35 to 45 mph. * RELATIVE HUMIDITY...As low as 6 to 10 percent. * IMPACTS...Any fires that do 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. && $$ For more information from the National Weather Service visit https://weather.gov/flagstaff/FireWeatherDecisionSupport
2 follow-up statements
614 WWUS85 KFGZ 051008 RFWFGZ URGENT - FIRE WEATHER MESSAGE National Weather Service Flagstaff AZ 308 AM MST Mon Apr 5 2021 AZZ110-111-113-114-116-140-060200- /O.CON.KFGZ.FW.W.0002.210405T1900Z-210406T0200Z/ Chinle Valley (Fire Weather Zone 110)- Chuska Mountains and Defiance Plateau (Fire Weather Zone 111)- Little Colorado River Valley in Navajo County (Fire Weather Zone 113)- Little Colorado River Valley in Apache County (Fire Weather Zone 114)-Eastern Mogollon Rim (Fire Weather Zone 116)- Northeast Plateaus and Mesas South of Hwy 264 (Fire Weather Zone 140)- 308 AM MST Mon Apr 5 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 7 PM MST THIS EVENING FOR FAR SOUTHEASTERN COCONINO COUNTY AND MUCH OF NAVAJO AND APACHE COUNTIES... * AFFECTED AREA...Locations near Buffalo Pass, Chinle, Dilkon, Eagar-Springerville, Forest Lakes, Ganado, Heber-Overgaard, Holbrook, Kayenta, Kykotsmovi, Saint Johns, Snowflake-Taylor, Window Rock and Winslow. This includes portions of the Apache- Sitgreaves National Forest and Coconino National Forest. * WINDS...Southwest 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 6 to 10 percent. * IMPACTS...Any fires that do start will have the potential to spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring or are imminent. A combination of strong winds and low relative humidities can contribute to extreme fire behavior. Please notify field crews of this red flag warning. && $$ For more information from the National Weather Service visit http://weather.gov/flagstaff
478 WWUS85 KFGZ 060200 RFWFGZ URGENT - FIRE WEATHER MESSAGE National Weather Service Flagstaff AZ 700 PM MST Mon Apr 5 2021 AZZ110-111-113-114-116-140-060300- /O.EXP.KFGZ.FW.W.0002.000000T0000Z-210406T0200Z/ 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)-Eastern Mogollon Rim (Fire Weather Zone 116)- Northeast Plateaus and Mesas South of Hwy 264 (Fire Weather Zone 140)- 700 PM MST Mon Apr 5 2021 ...RED FLAG WARNING WILL EXPIRE AT 7 PM MST THIS EVENING FOR FAR SOUTHEASTERN COCONINO COUNTY AND MUCH OF NAVAJO AND APACHE COUNTIES... Wind speeds will continue to decrease below warning criteria this evening and the Red Flag Warning will expire at 7 PM MST (8 PM Navajo Nation). It will remain breezy overnight in this area with a few areas experiencing gusts of 20 to 30 mph, particularly in the area from St Johns to Springerville. $$ 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 4, 3:42 AM MST | Fire Weather Watch | FGZ | Apache, Coconino, Navajo | 9 hr |
| Apr 4, 1:07 PM MST | Wind Advisory | FGZ | Apache, Coconino, Navajo | 30 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.