Alert archive / Arizona / Red Flag Warnings in 2018
Red Flag Warning 7, NWS Las Vegas, NV
NWS Las Vegas, NV issued this red flag warning at May 25, 2018, 3:15 AM MST for Mohave County, Arizona; Clark County, Nevada. It took effect at May 25, 2018, 11:00 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
- May 25, 2018, 3:15 AM MST (10:15 UTC)
- In effect from
- May 25, 2018, 11:00 AM MST
- Expired
- May 25, 2018, 8:00 PM MST
- In force
- 9 hr
- Issued by
- NWS Las Vegas, NV
Counties Mohave County, AZ, Clark County, NV
The radar
The Las Vegas radar (KESX), 54 km from the middle of the area, began a volume at 10:16 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 00:00Z, 10.3 hours before the alert went out and 113 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
- 3824 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
007 WWUS85 KVEF 251015 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 315 AM PDT Fri May 25 2018 .An approaching weather system will result in increased winds that will lead to critical fire weather conditions along the Colorado River Valley and Mohave County, Arizona. Those planning to head out for outdoor recreation early for the holiday weekend should be aware of the fire danger. AZZ101-102-NVZ466-251800- /O.UPG.KVEF.FW.A.0005.180525T1800Z-180526T0300Z/ /O.NEW.KVEF.FW.W.0007.180525T1800Z-180526T0300Z/ Lake Mead NRA/Colorado River-AZ side- Northwest Deserts/Northwest Plateau-Lake Mead NRA/Colorado River- NV side- 315 AM PDT Fri May 25 2018 /315 AM MST Fri May 25 2018/ ...RED FLAG WARNING IN EFFECT FROM 11 AM PDT /11 AM MST/ THIS MORNING TO 8 PM PDT /8 PM MST/ THIS EVENING FOR STRONG WINDS AND LOW RH FOR FIRE WEATHER ZONES 101, 102, AND 466... The National Weather Service in Las Vegas has issued a Red Flag Warning, which is in effect from 11 AM PDT /11 AM MST/ this morning to 8 PM PDT /8 PM MST/ this evening. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...In Arizona...Fire weather zones 101 and 102.In Nevada...Fire weather zone 466. This includes the Lake Mead and Lake Mohave areas. * TIMING...Mid-day today through early this evening. * WIND...Southwest winds 15-25 MPH, Gusts to around 35 MPH. * HUMIDITY...5-10 percent in the valleys, and 10-15 percent in the mountains. * IMPACTS...Conditions will be favorable for rapid spread of new fires. Outdoor burning is not recommended. Increased outdoor recreation before the holiday weekend will contribute to increased fire concerns. 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. && $$ Kryston weather.gov/lasvegas
2 follow-up statements
354 WWUS85 KVEF 251735 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 1035 AM PDT Fri May 25 2018 .An approaching weather system will result in increased winds that will lead to critical fire weather conditions along the Colorado River Valley and Mohave County, Arizona. Those planning to head out for outdoor recreation early for the holiday weekend should be aware of the fire danger. AZZ101-102-NVZ466-260300- /O.CON.KVEF.FW.W.0007.180525T1800Z-180526T0300Z/ Lake Mead NRA/Colorado River-AZ side- Northwest Deserts/Northwest Plateau-Lake Mead NRA/Colorado River- NV side- 1035 AM PDT Fri May 25 2018 /1035 AM MST Fri May 25 2018/ ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT /8 PM MST/ THIS EVENING FOR STRONG WINDS AND LOW RH FOR FIRE WEATHER ZONES 101, 102, AND 466... * AFFECTED AREA...In Arizona...Fire weather zones 101 and 102. In Nevada...Fire weather zone 466. This includes the Lake Mead and Lake Mohave areas. * TIMING...Mid-day today through early this evening. * WIND...Southwest winds 15-25 MPH, Gusts to around 35 MPH. * HUMIDITY...5-10 percent in the valleys, and 10-15 percent in the mountains. * IMPACTS...Conditions will be favorable for rapid spread of new fires. Outdoor burning is not recommended. Increased outdoor recreation before the holiday weekend will contribute to increased fire concerns. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ weather.gov/lasvegas
432 WWUS85 KVEF 260256 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 756 PM PDT Fri May 25 2018 AZZ101-102-NVZ466-260400- /O.EXP.KVEF.FW.W.0007.000000T0000Z-180526T0300Z/ Lake Mead NRA/Colorado River-AZ side- Northwest Deserts/Northwest Plateau-Lake Mead NRA/Colorado River- NV side- 756 PM PDT Fri May 25 2018 /756 PM MST Fri May 25 2018/ ...RED FLAG WARNING WILL EXPIRE AT 8 PM PDT /8 PM MST/ THIS EVENING FOR STRONG WINDS AND LOW RH FOR FIRE WEATHER ZONES 101, 102, AND 466... Winds have started to subside and humidity values are slowly increasing. Therefore, the warning has been allowed to expire at 8 pm. $$ weather.gov/lasvegas
Nearby
Red Flag Warnings in Arizona, 2018Red Flag Warnings in Nevada, 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.