Alert archive / Nevada / Red Flag Warnings in 2021
Red Flag Warning 7, NWS Las Vegas, NV
NWS Las Vegas, NV issued this red flag warning at Apr 30, 2021, 12:54 PM MST for Mohave County, Arizona; Clark County, Lincoln County, Nye County, Nevada. It took effect at May 1, 2021, 11:00 AM MST. It was in force for 12 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 30, 2021, 12:54 PM MST (19:54 UTC)
- In effect from
- May 1, 2021, 11:00 AM MST
- Expired
- May 1, 2021, 11:00 PM MST
- In force
- 12 hr
- Issued by
- NWS Las Vegas, NV
Counties Mohave County, AZ, Clark County, NV, Lincoln County, NV, Nye County, NV
The radar
The Las Vegas radar (KESX), 134 km from the middle of the area, began a volume at 19:58 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, 7.9 hours before the alert went out and 74 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
- 3754 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 7 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
437 WWUS85 KVEF 301954 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 1254 PM PDT Fri Apr 30 2021 AZZ101-102-NVZ463>466-011200- /O.NEW.KVEF.FW.W.0007.210501T1800Z-210502T0600Z/ Lake Mead NRA/Colorado River-AZ side- Northwest Deserts/Northwest Plateau-Sheep Range-Spring Mountains- Clark and SW Lincoln County Deserts/Las Vegas Dispatch- Lake Mead NRA/Colorado River-NV side- 1254 PM PDT Fri Apr 30 2021 /1254 PM MST Fri Apr 30 2021/ ...RED FLAG WARNING IN EFFECT FROM 11 AM PDT TO 11 PM PDT SATURDAY FOR STRONG WINDS AND LOW HUMIDITY FOR SOUTHERN NEVADA AND NORTHWEST ARIZONA... The National Weather Service in Las Vegas has issued a Red Flag Warning, which is in effect from 11 AM PDT to 11 PM PDT Saturday. * AFFECTED AREA...In Arizona...Fire weather zones 101 and 102.In Nevada...Fire weather zones 463, 464, 465, and 466. * TIMING...Saturday morning through Saturday night. * WIND...Winds will increase Saturday morning and become south- southwest 15-25 mph with gusts to 30 mph which will continue into at least the late evening. Local gusts to 40 mph possible. * HUMIDITY...Minimum humidity 5-12 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. 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. && $$ weather.gov/lasvegas
4 follow-up statements
000 WWUS85 KVEF 010747 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 1247 AM PDT Sat May 1 2021 AZZ101-102-NVZ463>466-012200- /O.CON.KVEF.FW.W.0007.210501T1800Z-210502T0600Z/ Lake Mead NRA/Colorado River-AZ side- Northwest Deserts/Northwest Plateau-Sheep Range-Spring Mountains- Clark and SW Lincoln County Deserts/Las Vegas Dispatch- Lake Mead NRA/Colorado River-NV side- 1247 AM PDT Sat May 1 2021 /1247 AM MST Sat May 1 2021/ ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 11 PM THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY FOR SOUTHERN NEVADA AND NORTHWEST ARIZONA... * AFFECTED AREA...In Arizona...Fire weather zones 101 and 102.In Nevada...Fire weather zones 463, 464, 465, and 466. * TIMING...through 11 pm Tonight. * WIND...Winds will increase this morning and become south- southwest 15-25 mph with gusts to 30 mph which will continue into at least the late evening. Local gusts to 40 mph possible. * HUMIDITY...Minimum humidity 5-12 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ weather.gov/lasvegas
964 WWUS85 KVEF 012133 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 233 PM PDT Sat May 1 2021 AZZ101-102-NVZ463>466-020600- /O.CON.KVEF.FW.W.0007.000000T0000Z-210502T0600Z/ Lake Mead NRA/Colorado River-AZ side- Northwest Deserts/Northwest Plateau-Sheep Range-Spring Mountains- Clark and SW Lincoln County Deserts/Las Vegas Dispatch- Lake Mead NRA/Colorado River-NV side- 233 PM PDT Sat May 1 2021 /233 PM MST Sat May 1 2021/ ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT /11 PM MST/ THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY FOR SOUTHERN NEVADA AND NORTHWEST ARIZONA... * AFFECTED AREA...In Arizona...Fire weather zones 101 and 102. In Nevada...Fire weather zones 463, 464, 465, and 466. * TIMING...through 11 pm Tonight. * WIND...South-southwest 15-25 mph with gusts to 35 mph which will continue into the evening. * HUMIDITY...Minimum humidity 8-12 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. 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. && $$ weather.gov/lasvegas
419 WWUS85 KVEF 020308 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 808 PM PDT Sat May 1 2021 AZZ101-NVZ463>466-020415- /O.CAN.KVEF.FW.W.0007.000000T0000Z-210502T0600Z/ Lake Mead NRA/Colorado River-AZ side-Sheep Range-Spring Mountains- Clark and SW Lincoln County Deserts/Las Vegas Dispatch- Lake Mead NRA/Colorado River-NV side- 808 PM PDT Sat May 1 2021 /808 PM MST Sat May 1 2021/ ...RED FLAG WARNING IS CANCELLED FOR STRONG WINDS AND LOW HUMIDITY FOR SOUTHERN NEVADA AND THE LAKE MEAD NATIONAL RECREATION AREA... Winds have subsided this evening. The National Weather Service in Las Vegas has cancelled the Red Flag Warning. $$ AZZ102-020600- /O.CON.KVEF.FW.W.0007.000000T0000Z-210502T0600Z/ Northwest Deserts/Northwest Plateau- 808 PM MST Sat May 1 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY FOR NORTHWEST ARIZONA... * AFFECTED AREA...In Arizona...Fire weather zone 102. * TIMING...through 11 PM MST. * WIND...South southwest with gusts to 35 mph. * HUMIDITY...Minimum humidity near 10 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. 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. && $$ Morgan weather.gov/lasvegas
237 WWUS85 KVEF 020551 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 1051 PM PDT Sat May 1 2021 AZZ102-020700- /O.EXP.KVEF.FW.W.0007.000000T0000Z-210502T0600Z/ Northwest Deserts/Northwest Plateau- 1051 PM MST Sat May 1 2021 ...RED FLAG WARNING WILL EXPIRE AT 11 PM MST THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY FOR NORTHWEST ARIZONA... Decreasing winds and improving RH is expected through the remainder of the evening. $$ weather.gov/lasvegas
Nearby
Red Flag Warnings in Nevada, 2021Red 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.