Alert archive / Arizona / Red Flag Warnings in 2018
Red Flag Warning 4, NWS Las Vegas, NV
NWS Las Vegas, NV issued this red flag warning at May 9, 2018, 2:39 PM MST for Mohave County, Arizona. It took effect at May 10, 2018, 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
- May 9, 2018, 2:39 PM MST (21:39 UTC)
- In effect from
- May 10, 2018, 12:00 PM MST
- Expired
- May 10, 2018, 7:00 PM MST
- In force
- 7 hr
- Issued by
- NWS Las Vegas, NV
County Mohave County, AZ
The radar
The Las Vegas radar (KESX), 102 km from the middle of the area, began a volume at 21:40 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
Las Vegas, NV (KVEF), launched 12:00Z, 9.7 hours before the alert went out and 177 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
- 4667 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- -54 m²/s²
- 0-3 km storm-relative helicity
- -44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
154 WWUS85 KVEF 092139 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 239 PM PDT Wed May 9 2018 AZZ102-101100- /O.UPG.KVEF.FW.A.0004.180510T1800Z-180511T0300Z/ /O.NEW.KVEF.FW.W.0004.180510T1900Z-180511T0200Z/ /O.EXT.KVEF.FW.A.0003.180511T1900Z-180512T0300Z/ Northwest Deserts/Northwest Plateau- 239 PM MST Wed May 9 2018 ...RED FLAG WARNING IN EFFECT FROM NOON TO 7 PM MST THURSDAY FOR STRONG WINDS AND LOW RH FOR FIRE WEATHER ZONE 102... ...FIRE WEATHER WATCH NOW IN EFFECT FROM FRIDAY AFTERNOON THROUGH FRIDAY EVENING FOR STRONG WINDS AND LOW RH FOR FIRE WEATHER ZONE 102... The National Weather Service in Las Vegas has issued a Red Flag Warning, which is in effect from noon to 7 PM MST Thursday. A Fire Weather Watch remains in effect Friday afternoon and Friday evening. * AFFECTED AREA...In Arizona...Fire weather zone 102. * TIMING...Strong winds will develop Thursday afternoon through Thursday evening, and again Friday afternoon through Friday evening. * WIND...Southwest gusts 35 to 40 mph on Thursday afternoon and evening. Gusts 40 to 50 mph Friday afternoon and evening. * HUMIDITY...Minimum afternoon humidity 6 to 12 percent for lower elevations and 10 to 15 percent for higher elevations. Minimum humidity values will climb around 5 percent Friday as moisture increases slightly and temperatures lower. * IMPACTS...A Red Flag Warning means that critical fire weather conditions are expected. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. Any fires that develop will likely spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... Outdoor burning is not recommended. Heed all fire restrictions. && $$ CAZ226-101100- /O.NEW.KVEF.FW.W.0005.180511T2200Z-180512T0600Z/ Owens Valley/Southern Inyo Forest- 239 PM PDT Wed May 9 2018 ...RED FLAG WARNING IN EFFECT FROM 3 PM TO 11 PM PDT FRIDAY FOR STRONG WINDS AND LOW RH FOR FIRE WEATHER ZONE 226... The National Weather Service in Las Vegas has issued a Red Flag Warning, which is in effect from 3 PM to 11 PM PDT Friday. * AFFECTED AREA...In California...Fire weather zone 226. * TIMING...Gusty north winds will develop and persist by mid Friday afternoon and persist through Friday evening. * WIND...North wind 20 to 30 mph with gusts up to 45 mph. * HUMIDITY...Minimum humidity values 7 to 10 percent Friday afternoon then climbing to 15 to 25 percent late Friday evening. * IMPACTS...A Red Flag Warning means that critical fire weather conditions are expected. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. Any fires that develop will likely spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... Outdoor burning is not recommended. Heed all fire restrictions. && $$ weather.gov/lasvegas
3 follow-up statements
379 WWUS85 KVEF 101001 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 301 AM PDT Thu May 10 2018 AZZ102-102215- /O.UPG.KVEF.FW.A.0003.180511T1900Z-180512T0300Z/ /O.EXB.KVEF.FW.W.0005.180511T1900Z-180512T0600Z/ /O.CON.KVEF.FW.W.0004.180510T1900Z-180511T0200Z/ Northwest Deserts/Northwest Plateau- 301 AM MST Thu May 10 2018 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 7 PM MST THIS EVENING FOR STRONG WINDS AND LOW RH FOR FIRE WEATHER ZONE 102... ...RED FLAG WARNING IN EFFECT FROM NOON TO 11 PM MST FRIDAY FOR STRONG WINDS AND LOW RH FOR FIRE WEATHER ZONE 226... The National Weather Service in Las Vegas has issued a Red Flag Warning, which is in effect from noon to 11 PM MST Friday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...In Arizona...Fire weather zone 102. Especially for areas south of the Colorado River Valley where the driest fuels exist. * TIMING...Strong winds will develop Thursday afternoon through Thursday evening, and again Friday afternoon through Friday evening. * WIND...Southwest gusts 35 to 40 mph today and evening. Gusts 40 to 50 mph Friday afternoon and evening. * HUMIDITY...Minimum afternoon humidity 6 to 12 percent for lower elevations and 10 to 15 percent for higher elevations. Minimum humidity values will climb around 5 percent Friday as moisture increases slightly and temperatures lower. * IMPACTS...A Red Flag Warning means that critical fire weather conditions are expected. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. Any fires that develop will likely spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... Outdoor burning is not recommended. Heed all fire restrictions. && $$ CAZ226-102215- /O.CON.KVEF.FW.W.0005.180511T2200Z-180512T0600Z/ Owens Valley/Southern Inyo Forest- 301 AM PDT Thu May 10 2018 ...RED FLAG WARNING REMAINS IN EFFECT FROM 3 PM TO 11 PM PDT FRIDAY FOR STRONG WINDS AND LOW RH FOR FIRE WEATHER ZONE 226... * AFFECTED AREA...In California...Fire weather zone 226. * TIMING...Gusty north winds will develop and persist by mid Friday afternoon and persist through Friday evening. * WIND...North wind 20 to 30 mph with gusts up to 45 mph. * HUMIDITY...Minimum humidity values 7 to 10 percent Friday afternoon then climbing to 15 to 25 percent late Friday evening. * IMPACTS...A Red Flag Warning means that critical fire weather conditions are expected. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. Any fires that develop will likely spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... Outdoor burning is not recommended. Heed all fire restrictions. && $$ weather.gov/lasvegas
272 WWUS85 KVEF 102140 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 240 PM PDT Thu May 10 2018 AZZ102-110200- /O.CON.KVEF.FW.W.0004.000000T0000Z-180511T0200Z/ /O.CON.KVEF.FW.W.0005.180511T1900Z-180512T0600Z/ Northwest Deserts/Northwest Plateau- 240 PM MST Thu May 10 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MST THIS EVENING FOR STRONG WINDS AND LOW RH FOR FIRE WEATHER ZONE 102... ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 11 PM MST FRIDAY FOR STRONG WINDS AND LOW RH FOR FIRE WEATHER ZONE 102... The National Weather Service in Las Vegas has issued a Red Flag Warning, which is in effect from noon to 11 PM MST Friday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...In Arizona...Fire weather zone 102. Especially for areas south of the Colorado River Valley where the driest fuels exist. * TIMING...Strong winds will continue through this evening, and then redevelop again Friday afternoon through Friday evening. * WIND...Southwest gusts 35 to 40 mph today and evening. Gusts 40 to 50 mph Friday afternoon and evening. * HUMIDITY...Minimum afternoon humidity 6 to 12 percent for lower elevations and 10 to 15 percent for higher elevations. Minimum humidity values will climb around 5 percent Friday as moisture increases slightly and temperatures lower. * IMPACTS...A Red Flag Warning means that critical fire weather conditions are expected. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. Any fires that develop will likely spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... Outdoor burning is not recommended. Heed all fire restrictions. && $$ CAZ226-110200- /O.CON.KVEF.FW.W.0005.180511T2200Z-180512T0600Z/ Owens Valley/Southern Inyo Forest- 240 PM PDT Thu May 10 2018 ...RED FLAG WARNING REMAINS IN EFFECT FROM 3 PM TO 11 PM PDT FRIDAY FOR STRONG WINDS AND LOW RH FOR FIRE WEATHER ZONE 226... * AFFECTED AREA...In California...Fire weather zone 226. * TIMING...Gusty north winds will develop and persist by mid Friday afternoon and persist through Friday evening. * WIND...North wind 20 to 30 mph with gusts up to 45 mph. * HUMIDITY...Minimum humidity values 7 to 10 percent Friday afternoon then climbing to 15 to 25 percent late Friday evening. * IMPACTS...A Red Flag Warning means that critical fire weather conditions are expected. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. Any fires that develop will likely spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... Outdoor burning is not recommended. Heed all fire restrictions. && $$ weather.gov/lasvegas
340 WWUS85 KVEF 110148 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 648 PM PDT Thu May 10 2018 AZZ102-111100- /O.EXP.KVEF.FW.W.0004.000000T0000Z-180511T0200Z/ /O.CON.KVEF.FW.W.0005.180511T1900Z-180512T0600Z/ Northwest Deserts/Northwest Plateau- 648 PM MST Thu May 10 2018 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 11 PM MST FRIDAY FOR STRONG WINDS AND LOW RH FOR FIRE WEATHER ZONE 102... ...RED FLAG WARNING THAT WAS IN EFFECT TODAY HAS EXPIRED... * AFFECTED AREA...In Arizona...Fire weather zone 102. Especially for areas south of the Colorado River Valley where the driest fuels exist. * TIMING...Strong winds will develop again Friday afternoon through Friday evening. * WIND...Southwest gusts 40 to 50 mph Friday afternoon and evening. * HUMIDITY...Minimum afternoon humidity 8 to 12 percent for lower elevations and 10 to 15 percent for higher elevations. * IMPACTS...A Red Flag Warning means that critical fire weather conditions are expected. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. Any fires that develop will likely spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... Outdoor burning is not recommended. Heed all fire restrictions. && 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 can contribute to extreme fire behavior. && $$ CAZ226-111100- /O.CON.KVEF.FW.W.0005.180511T2200Z-180512T0600Z/ Owens Valley/Southern Inyo Forest- 648 PM PDT Thu May 10 2018 ...RED FLAG WARNING REMAINS IN EFFECT FROM 3 PM TO 11 PM PDT FRIDAY FOR STRONG WINDS AND LOW RH FOR FIRE WEATHER ZONE 226... * AFFECTED AREA...In California...Fire weather zone 226. * TIMING...Gusty north winds will develop and persist by mid Friday afternoon and persist through Friday evening. * WIND...North wind 20 to 30 mph with gusts up to 45 mph. * HUMIDITY...Minimum humidity values 7 to 10 percent Friday afternoon then climbing to 15 to 25 percent late Friday evening. * IMPACTS...A Red Flag Warning means that critical fire weather conditions are expected. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. Any fires that develop will likely spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... Outdoor burning is not recommended. Heed all fire restrictions. && $$ weather.gov/lasvegas
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 9, 3:40 AM MST | Fire Weather Watch | VEF | Mohave | 11 hr |
| May 9, 2:39 PM MST | Red Flag Warning | VEF | Mohave | 56 hr |
Nearby
Red Flag Warnings in Arizona, 2018Every red flag warning in 2018
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.