Alert archive / Arizona / Red Flag Warnings in 2021
Red Flag Warning 4, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this red flag warning at Apr 14, 2021, 2:24 PM MST for Apache County, Coconino County, Navajo County, Arizona. It took effect at Apr 15, 2021, 10:00 AM MST. It was in force for 9 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 14, 2021, 2:24 PM MST (21:24 UTC)
- In effect from
- Apr 15, 2021, 10:00 AM MST
- Expired
- Apr 15, 2021, 7:09 PM MST
- In force
- 9 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 21:28 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, 9.4 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
- 1913 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 338 m²/s²
- 0-3 km storm-relative helicity
- 367 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
027 WWUS85 KFGZ 142124 RFWFGZ URGENT - FIRE WEATHER MESSAGE National Weather Service Flagstaff AZ 224 PM MST Wed Apr 14 2021 AZZ111-113-114-116-140-160300- /O.UPG.KFGZ.FW.A.0003.210415T1800Z-210416T0300Z/ /O.NEW.KFGZ.FW.W.0004.210415T1700Z-210416T0300Z/ /O.CON.KFGZ.FW.W.0003.000000T0000Z-210415T0300Z/ 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)- 224 PM MST Wed Apr 14 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MST THIS EVENING FOR MUCH OF COCONINO, NAVAJO,AND APACHE COUNTIES... ...RED FLAG WARNING IN EFFECT FROM 10 AM TO 8 PM MST THURSDAY DUE TO STRONG WINDS AND LOW RELATIVE HUMIDITY FOR PORTIONS OF COCONINO, 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 10 AM to 8 PM MST Thursday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Locations near Buffalo Pass, Dilkon, Eagar- Springerville, Forest Lakes, Ganado, Heber-Overgaard, Holbrook, Kykotsmovi, Saint Johns, Snowflake-Taylor, Window Rock and Winslow. This includes portions of the Apache- Sitgreaves National Forest, Coconino National Forest and Tonto National Forest. * WINDS...Southwest 20 to 30 mph with gusts up to 40-50 mph. * RELATIVE HUMIDITY...As low as 7 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. && $$ AZZ139-160300- /O.NEW.KFGZ.FW.W.0004.210415T1700Z-210416T0300Z/ /O.CON.KFGZ.FW.W.0003.000000T0000Z-210415T0300Z/ Black Mesa Area (Fire Weather Zone 139)- 224 PM MST Wed Apr 14 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MST THIS EVENING FOR MUCH OF COCONINO, NAVAJO,AND APACHE COUNTIES... ...RED FLAG WARNING IN EFFECT FROM 10 AM TO 8 PM MST THURSDAY DUE TO STRONG WINDS AND LOW RELATIVE HUMIDITY FOR BLACK MESA IN APACHE COUNTY... The National Weather Service in Flagstaff has issued a Red Flag Warning due to strong winds and low relative humidity, which is in effect from 10 AM to 8 PM MST Thursday. * AFFECTED AREA...Locations near Shonto. * WINDS...Southwest 20 to 30 mph with gusts up to 40-50 mph. * RELATIVE HUMIDITY...As low as 8 percent. * IMPACTS...Any fires that start will have the potential to spread rapidly. $$ AZZ117-160300- /O.UPG.KFGZ.FW.A.0003.210415T1800Z-210416T0300Z/ /O.NEW.KFGZ.FW.W.0004.210415T1700Z-210416T0300Z/ White Mountains (Fire Weather Zone 117)- 224 PM MST Wed Apr 14 2021 ...RED FLAG WARNING IN EFFECT FROM 10 AM TO 8 PM MST THURSDAY DUE TO STRONG WINDS AND LOW RELATIVE HUMIDITY FOR THE WHITE MOUNTAIN REGION IN APACHE 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 10 AM to 8 PM MST Thursday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Locations near Alpine, Pinetop-Lakeside, Show Low and Whiteriver. This includes portions of the Apache- Sitgreaves National Forest. * WINDS...Southwest 15 to 25 mph with gusts up to 40-45 mph. * RELATIVE HUMIDITY...As low as 11 percent. * IMPACTS... 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. && $$ AZZ104>107-109-110-112-150300- /O.CON.KFGZ.FW.W.0003.000000T0000Z-210415T0300Z/ Kaibab Plateau (Fire Weather Zone 104)- Marble and Glen Canyons (Fire Weather Zone 105)- Grand Canyon Country (Fire Weather Zone 106)- Coconino Plateau (Fire Weather Zone 107)- Northeast Plateau And Mesas Hwy 264 Northward (Fire Weather Zone 109)-Chinle Valley (Fire Weather Zone 110)- Little Colorado River Valley in Coconino County (Fire Weather Zone 112)- 224 PM MST Wed Apr 14 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MST THIS EVENING FOR MUCH OF COCONINO, NAVAJO,AND APACHE COUNTIES... * AFFECTED AREA...Locations near Chinle, Fredonia, Grand Canyon, Jacob Lake, Kayenta, North Rim, Page, Tuba City and Valle. This includes portions of the Coconino National Forest and Kaibab National Forest. * WINDS...Southwest 20 to 30 mph with gusts up to 40-50 mph. * RELATIVE HUMIDITY...As low as 8 percent. * IMPACTS...Any fires that start will have the potential to spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring or are imminent. A combination of strong winds and low relative humidities can contribute to extreme fire behavior. Please notify field crews of this red flag warning. && $$ For more information from the National Weather Service visit http://weather.gov/flagstaff
4 follow-up statements
628 WWUS85 KFGZ 150258 RFWFGZ URGENT - FIRE WEATHER MESSAGE National Weather Service Flagstaff AZ 758 PM MST Wed Apr 14 2021 AZZ111-113-114-116-139-140-151730- /O.EXP.KFGZ.FW.W.0003.000000T0000Z-210415T0300Z/ /O.CON.KFGZ.FW.W.0004.210415T1700Z-210416T0300Z/ 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)- Black Mesa Area (Fire Weather Zone 139)- Northeast Plateaus and Mesas South of Hwy 264 (Fire Weather Zone 140)- 758 PM MST Wed Apr 14 2021 ...THE RED FLAG WARNING FOR WEDNESDAY WILL BE ALLOWED TO EXPIRE AT 8 PM MST (9 PM NAVAJO NATION)... ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM TO 8 PM MST (11 AM TO 9 PM NAVAJO NATION) THURSDAY FOR MUCH OF COCONINO, NAVAJO, AND APACHE COUNTIES AND THE NAVAJO NATION... * AFFECTED AREA...Locations near Buffalo Pass, Dilkon, Eagar- Springerville, Forest Lakes, Ganado, Heber-Overgaard, Holbrook, Kykotsmovi, Saint Johns, Shonto, Snowflake-Taylor, Window Rock and Winslow. This includes portions of the Apache- Sitgreaves National Forest, Coconino National Forest and Tonto National Forest. * WINDS...Southwest 15 to 25 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 7 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. && $$ AZZ104>107-109-110-112-150400- /O.EXP.KFGZ.FW.W.0003.000000T0000Z-210415T0300Z/ Kaibab Plateau (Fire Weather Zone 104)- Marble and Glen Canyons (Fire Weather Zone 105)- Grand Canyon Country (Fire Weather Zone 106)- Coconino Plateau (Fire Weather Zone 107)- Northeast Plateau And Mesas Hwy 264 Northward (Fire Weather Zone 109)-Chinle Valley (Fire Weather Zone 110)- Little Colorado River Valley in Coconino County (Fire Weather Zone 112)- 758 PM MST Wed Apr 14 2021 ...THE RED FLAG WARNING FOR WEDNESDAY WILL BE ALLOWED TO EXPIRE AT 8 PM MST (9 PM NAVAJO NATION)... Relative humidity will increase overnight and windy conditions will slow to breezy across the region so fire weather conditions will subside through this evening. $$ AZZ117-151730- /O.CON.KFGZ.FW.W.0004.210415T1700Z-210416T0300Z/ White Mountains (Fire Weather Zone 117)- 758 PM MST Wed Apr 14 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM TO 8 PM MST THURSDAY FOR THE WHITE MOUNTAIN REGION IN APACHE COUNTY... * AFFECTED AREA...Locations near Alpine, Pinetop-Lakeside, Show Low and Whiteriver. This includes portions of the Apache- Sitgreaves National Forest. * WINDS...Southwest 15 to 25 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 11 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. && $$ For more information from the National Weather Service visit http://weather.gov/flagstaff
523 WWUS85 KFGZ 151157 RFWFGZ URGENT - FIRE WEATHER MESSAGE National Weather Service Flagstaff AZ 457 AM MST Thu Apr 15 2021 AZZ111-113-114-116-117-139-140-160300- /O.CON.KFGZ.FW.W.0004.210415T1700Z-210416T0300Z/ Chuska Mountains and Defiance Plateau (Fire Weather Zone 111)- Little Colorado River Valley in Navajo County (Fire Weather Zone 113)- Little Colorado River Valley in Apache County (Fire Weather Zone 114)-Eastern Mogollon Rim (Fire Weather Zone 116)- White Mountains (Fire Weather Zone 117)- Black Mesa Area (Fire Weather Zone 139)- Northeast Plateaus and Mesas South of Hwy 264 (Fire Weather Zone 140)- 457 AM MST Thu Apr 15 2021 ...RED FLAG WARNING WILL BE IN EFFECT FROM 10 AM MST THIS MORNING TO 8 PM MST THIS EVENING (11 AM TO 9 PM NAVAJO NATION)... * AFFECTED AREA...Locations near Alpine, Buffalo Pass, Dilkon, Eagar-Springerville, Forest Lakes, Ganado, Heber-Overgaard, Holbrook, Kykotsmovi, Pinetop-Lakeside, Saint Johns, Shonto, Show Low, Snowflake-Taylor, Whiteriver, Window Rock and Winslow. This includes portions of the Apache-Sitgreaves National Forest, Coconino National Forest and Tonto National Forest. * WINDS...Southwest/West 20 to 30 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 7 percent. * IMPACTS...Any fires that start will have the potential to spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring or are imminent. A combination of strong winds and low relative humidities can contribute to extreme fire behavior. Please notify field crews of this red flag warning. && $$ For more information from the National Weather Service visit http://weather.gov/flagstaff
791 WWUS85 KFGZ 151910 RFWFGZ URGENT - FIRE WEATHER MESSAGE National Weather Service Flagstaff AZ 1210 PM MST Thu Apr 15 2021 AZZ111-113-114-116-117-139-140-160300- /O.CON.KFGZ.FW.W.0004.000000T0000Z-210416T0300Z/ 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)- White Mountains (Fire Weather Zone 117)- Black Mesa Area (Fire Weather Zone 139)- Northeast Plateaus and Mesas South of Hwy 264 (Fire Weather Zone 140)- 1210 PM MST Thu Apr 15 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MST (9 PM NAVAJO NATION) THIS EVENING... * AFFECTED AREA...Locations near Alpine, Buffalo Pass, Dilkon, Eagar-Springerville, Forest Lakes, Ganado, Heber-Overgaard, Holbrook, Kykotsmovi, Pinetop-Lakeside, Saint Johns, Shonto, Show Low, Snowflake-Taylor, Whiteriver, Window Rock and Winslow. This includes portions of the Apache-Sitgreaves National Forest, Coconino National Forest and Tonto National Forest. * WINDS...West 20 to 30 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 7 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. && $$ For more information from the National Weather Service visit http://weather.gov/flagstaff
049 WWUS85 KFGZ 160209 RFWFGZ URGENT - FIRE WEATHER MESSAGE National Weather Service Flagstaff AZ 709 PM MST Thu Apr 15 2021 AZZ111-113-114-116-117-139-140-160315- /O.CAN.KFGZ.FW.W.0004.000000T0000Z-210416T0300Z/ Chuska Mountains and Defiance Plateau (Fire Weather Zone 111)- Little Colorado River Valley in Navajo County (Fire Weather Zone 113)- Little Colorado River Valley in Apache County (Fire Weather Zone 114)-Eastern Mogollon Rim (Fire Weather Zone 116)- White Mountains (Fire Weather Zone 117)- Black Mesa Area (Fire Weather Zone 139)- Northeast Plateaus and Mesas South of Hwy 264 (Fire Weather Zone 140)- 709 PM MST Thu Apr 15 2021 ...RED FLAG WARNING FOR EASTERN ARIZONA IS CANCELLED... The National Weather Service in Flagstaff has cancelled the Red Flag Warning that was in effect for much of east-central and northeastern Arizona. Surface observations over the last hour have showed an uptick in relative humidity and a decrease in wind speeds below product thresholds. $$ 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 14, 2:58 PM MST | Wind Advisory | FGZ | Apache, Coconino, Navajo | 28 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.