Alert archive / Arizona / Red Flag Warnings in 2011
Red Flag Warning 3, NWS Flagstaff, AZ
NWS Flagstaff, AZ issued this red flag warning at Apr 18, 2011, 2:49 AM MST for Apache County, Coconino County, Navajo County, Arizona. It took effect at Apr 18, 2011, 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 18, 2011, 2:49 AM MST (09:49 UTC)
- In effect from
- Apr 18, 2011, 12:00 PM MST
- Expired
- Apr 18, 2011, 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 09:49 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, 9.8 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
- 3171 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -6 m²/s²
- 0-3 km storm-relative helicity
- 78 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
645 WWUS85 KFGZ 180949 RFWFGZ URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE FLAGSTAFF AZ 249 AM MST MON APR 18 2011 ...FIRE WEATHER WATCH IS IN EFFECT FROM NOON MST MONDAY UNTIL 7 PM MST MONDAY EVENING FOR PORTIONS OF NORTHEASTERN ARIZONA BELOW 7000 FEET DUE TO STRONG WINDS AND LOW RELATIVE HUMIDITIES... .AN APPROACHING COLD FRONT WILL BRING STRONG SOUTHWEST WINDS AND LOW RELATIVE HUMIDITIES TO MUCH OF NORTHEASTERN ARIZONA THIS AFTERNOON AND EVENING. CRITICAL FIRE WEATHER CONDITIONS ARE EXPECTED FOR ELEVATIONS BELOW 7000 FEET FOR PORTIONS OF NORTHEAST ARIZONA. AZZ110>114-140-182200- /O.UPG.KFGZ.FW.A.0003.110418T1900Z-110419T0200Z/ /O.NEW.KFGZ.FW.W.0003.110418T1900Z-110419T0200Z/ CHINLE VALLEY (FIRE WEATHER ZONE 110)- CHUSKA MOUNTAINS AND DEFIANCE PLATEAU (FIRE WEATHER ZONE 111)- LITTLE COLORADO RIVER VALLEY IN COCONINO COUNTY (FIRE WEATHER ZONE 112)- LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY (FIRE WEATHER ZONE 113)- LITTLE COLORADO RIVER VALLEY IN APACHE COUNTY (FIRE WEATHER ZONE 114)- NORTHEAST PLATEAUS AND MESAS SOUTH OF HWY 264 (FIRE WEATHER ZONE 140)- 249 AM MST MON APR 18 2011 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 7 PM MST THIS EVENING FOR STRONG WINDS AND LOW RELATIVE HUMIDITIES... THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT FROM NOON TODAY TO 7 PM MST THIS EVENING DUE TO STRONG WINDS AND LOW RELATIVE HUMIDITIES. THE FIRE WEATHER WATCH IS NO LONGER IN EFFECT. * THE AFFECTED AREA INCLUDES THE CHINLE VALLEY...CHUSKA MOUNTAINS AND DEFIANCE PLATEAU...THE ENTIRE LITTLE COLORADO RIVER VALLEY AND THE NORTHEAST PLATEAUS AND MESAS SOUTH OF HIGHWAY 264. * TIMING: GUSTY SOUTHWEST WINDS WILL DEVELOP BY MID MORNING. RELATIVE HUMIDITIES WILL FALL BELOW 15 PERCENT AFTER 12 PM. CRITICAL FIRE WEATHER CONDITIONS WILL CONTINUE THROUGH EARLY THIS EVENING. * 20-FOOT WINDS: SOUTHWEST WINDS OF 20 TO 30 MPH WILL DEVELOP BY MID MORNING. SOUTHWEST WIND GUSTS TO 45 MPH ARE EXPECTED THIS AFTERNOON THROUGH 7 PM MST. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. PLEASE NOTIFY FIELD CREWS OF THIS RED FLAG WARNING. && $$ HTTP://WEATHER.GOV/FLAGSTAFF
3 follow-up statements
195 WWUS85 KFGZ 181005 CCA RFWFGZ URGENT - FIRE WEATHER MESSAGE...CORRECTED NATIONAL WEATHER SERVICE FLAGSTAFF AZ 304 AM MST MON APR 18 2011 ...RED FLAG WARNING IN EFFECT TODAY FROM NOON MST UNTIL 7 PM MST FOR PORTIONS OF NORTHEASTERN ARIZONA BELOW 7000 FEET DUE TO STRONG WINDS AND LOW RELATIVE HUMIDITIES... .AN APPROACHING COLD FRONT WILL BRING STRONG SOUTHWEST WINDS AND LOW RELATIVE HUMIDITIES TO MUCH OF NORTHEASTERN ARIZONA THIS AFTERNOON AND EVENING. CRITICAL FIRE WEATHER CONDITIONS ARE EXPECTED FOR ELEVATIONS BELOW 7000 FEET FOR PORTIONS OF NORTHEAST ARIZONA. AZZ110>114-140-182230- /O.UPG.KFGZ.FW.A.0003.110418T1900Z-110419T0200Z/ /O.NEW.KFGZ.FW.W.0003.110418T1900Z-110419T0200Z/ CHINLE VALLEY (FIRE WEATHER ZONE 110)- CHUSKA MOUNTAINS AND DEFIANCE PLATEAU (FIRE WEATHER ZONE 111)- LITTLE COLORADO RIVER VALLEY IN COCONINO COUNTY (FIRE WEATHER ZONE 112)- LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY (FIRE WEATHER ZONE 113)- LITTLE COLORADO RIVER VALLEY IN APACHE COUNTY (FIRE WEATHER ZONE 114)- NORTHEAST PLATEAUS AND MESAS SOUTH OF HWY 264 (FIRE WEATHER ZONE 140)- 304 AM MST MON APR 18 2011 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 7 PM MST THIS EVENING FOR STRONG WINDS AND LOW RELATIVE HUMIDITIES... THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT FROM NOON TODAY TO 7 PM MST THIS EVENING DUE TO STRONG WINDS AND LOW RELATIVE HUMIDITIES. THE FIRE WEATHER WATCH IS NO LONGER IN EFFECT. * THE AFFECTED AREA INCLUDES THE CHINLE VALLEY...CHUSKA MOUNTAINS AND DEFIANCE PLATEAU...THE ENTIRE LITTLE COLORADO RIVER VALLEY AND THE NORTHEAST PLATEAUS AND MESAS SOUTH OF HIGHWAY 264. * TIMING: GUSTY SOUTHWEST WINDS WILL DEVELOP BY MID MORNING. RELATIVE HUMIDITIES WILL FALL BELOW 15 PERCENT AFTER 12 PM. CRITICAL FIRE WEATHER CONDITIONS WILL CONTINUE THROUGH EARLY THIS EVENING. * 20-FOOT WINDS: SOUTHWEST WINDS OF 20 TO 30 MPH WILL DEVELOP BY MID MORNING. SOUTHWEST WIND GUSTS TO 45 MPH ARE EXPECTED THIS AFTERNOON THROUGH 7 PM MST. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. PLEASE NOTIFY FIELD CREWS OF THIS RED FLAG WARNING. && $$ HTTP://WEATHER.GOV/FLAGSTAFF
060 WWUS85 KFGZ 181813 RFWFGZ URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE FLAGSTAFF AZ 1113 AM MST MON APR 18 2011 AZZ110>114-140-190200- /O.CON.KFGZ.FW.W.0003.110418T1900Z-110419T0200Z/ CHINLE VALLEY (FIRE WEATHER ZONE 110)- CHUSKA MOUNTAINS AND DEFIANCE PLATEAU (FIRE WEATHER ZONE 111)- LITTLE COLORADO RIVER VALLEY IN COCONINO COUNTY (FIRE WEATHER ZONE 112)- LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY (FIRE WEATHER ZONE 113)- LITTLE COLORADO RIVER VALLEY IN APACHE COUNTY (FIRE WEATHER ZONE 114)- NORTHEAST PLATEAUS AND MESAS SOUTH OF HWY 264 (FIRE WEATHER ZONE 140)- 1113 AM MST MON APR 18 2011 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MST THIS EVENING BELOW 7000 FEET FOR STRONG WINDS AND LOW RELATIVE HUMIDITIES... * AFFECTED AREA: THE CHINLE VALLEY...CHUSKA MOUNTAINS AND DEFIANCE PLATEAU...THE ENTIRE LITTLE COLORADO RIVER VALLEY AND THE NORTHEAST PLATEAUS AND MESAS SOUTH OF HIGHWAY 264. * TIMING: CRITICAL FIRE WEATHER CONDITIONS WILL PERSIST INTO THE EARLY EVENING HOURS...THEN WINDS WILL DECREASE AS HUMIDITY RISES FROM MID TO LATE EVENING. * 20-FOOT WINDS: SOUTHWEST WINDS OF 20 TO 30 MPH WITH GUSTS TO 45 MPH ARE EXPECTED TO CONTINUE THROUGH 7 PM MST. * RELATIVE HUMIDITIES: 10-15 PERCENT THROUGH EARLY THIS EVENING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. PLEASE NOTIFY FIELD CREWS OF THIS RED FLAG WARNING. && $$ HTTP://WEATHER.GOV/FLAGSTAFF
183 WWUS85 KFGZ 190159 RFWFGZ URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE FLAGSTAFF AZ 659 PM MST MON APR 18 2011 AZZ110>114-140-190300- /O.EXP.KFGZ.FW.W.0003.000000T0000Z-110419T0200Z/ CHINLE VALLEY (FIRE WEATHER ZONE 110)- CHUSKA MOUNTAINS AND DEFIANCE PLATEAU (FIRE WEATHER ZONE 111)- LITTLE COLORADO RIVER VALLEY IN COCONINO COUNTY (FIRE WEATHER ZONE 112)- LITTLE COLORADO RIVER VALLEY IN NAVAJO COUNTY (FIRE WEATHER ZONE 113)- LITTLE COLORADO RIVER VALLEY IN APACHE COUNTY (FIRE WEATHER ZONE 114)- NORTHEAST PLATEAUS AND MESAS SOUTH OF HWY 264 (FIRE WEATHER ZONE 140)- 659 PM MST MON APR 18 2011 ...RED FLAG WARNING WILL EXPIRE AT 7 PM MST THIS EVENING... THE RED FLAG WARNING WILL EXPIRE AT 7 PM MST THIS EVENING. AS RELATIVE HUMIDITIES CONTINUE TO RISE THIS EVENING...THE RED FLAG WARNING WILL BE ALLOWED TO EXPIRE AT 7 PM MST. OCCASIONALLY GUSTY WINDS WILL PERSIST THROUGH THE NIGHT. $$ HTTP://WEATHER.GOV/FLAGSTAFF
Nearby
Red Flag Warnings in Arizona, 2011Every red flag warning in 2011
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.