Alert archive / Nevada / Red Flag Warnings in 2021
Red Flag Warning 9, NWS Las Vegas, NV
NWS Las Vegas, NV issued this red flag warning at May 18, 2021, 3:09 PM MST for Mohave County, Arizona; Inyo County, San Bernardino County, California; 4 counties in Nevada. It took effect at May 19, 2021, 11:00 AM MST. It was in force for 39 hr. 6 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- May 18, 2021, 3:09 PM MST (22:09 UTC)
- In effect from
- May 19, 2021, 11:00 AM MST
- Expired
- May 21, 2021, 2:00 AM MST
- In force
- 39 hr
- Issued by
- NWS Las Vegas, NV
Counties Mohave County, AZ, Inyo County, CA, San Bernardino County, CA, Clark County, NV, Esmeralda County, NV, Lincoln County, NV, Nye County, NV
The radar
The Las Vegas radar (KESX), 142 km from the middle of the area, began a volume at 22:15 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 20, 4:55 PM MST | NON-TSTM WND GST 59 | 4 Sse Yermo, CA | BARSTOW-DAGGETT AIRPORT REPORTED A WIND GUST OF 59 MPH. |
| May 20, 5:33 PM MST | NON-TSTM WND GST 66 | 24 Sse Littlefield, AZ | START TIME 1133 MP. END TIME 533 PM. PEAK GUST 66 MPH. |
| May 20, 5:34 PM MST | NON-TSTM WND GST 64 | 1 Ese Red Rock Canyon, NV | START TIME 334 PM. END TIME 534 PM. PEAK GUST 64 MPH. |
| May 20, 7:50 PM MST | NON-TSTM WND GST 63 | 14 Sse Haiwee, CA | START TIME 630 PM. END TIME 820 PM. PEAK WIND 42 GUST 63 MPH. |
| May 20, 8:37 PM MST | NON-TSTM WND DMG | 13 Sse Haiwee, CA | CHP REPORTED A SEMI ROLLOVER ON HIGHWAY 395 BETWEEN OLANCHA AND PEARSONVILLE. |
| May 20, 9:53 PM MST | NON-TSTM WND GST 60 | 3 Sw Mercury, NV | BEGAN 753 PM AND ENDED 953. PEAK WIND GUST 60 MPH. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Las Vegas, NV (KVEF), launched 12:00Z, 10.2 hours before the alert went out and 47 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
- 2857 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 104 m²/s²
- 0-3 km storm-relative helicity
- 104 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
002 WWUS85 KVEF 182209 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 309 PM PDT Tue May 18 2021 .An approaching weather system will bring gusty south to southwest winds will combine with very dry conditions across the Mojave Desert of southeast California and parts of southern Nevada and northwest Arizona Wednesday. Southwest winds will become stronger and expand across the entire region on Thursday leading to widespread very high or extreme fire danger. Winds are expected to remain gusty through much of Friday across portions of the region. CAZ226-182315- /O.CAN.KVEF.FW.A.0005.210520T1500Z-210521T0600Z/ Owens Valley/Southern Inyo Forest- 309 PM PDT Tue May 18 2021 ...FIRE WEATHER WATCH HAS BEEN CANCELLED FOR STRONG WINDS AND LOW HUMIDITY FOR THE OWENS VALLEY AND EASTERN SIERRA... The National Weather Service in Las Vegas has cancelled the Fire Weather Watch for Thursday. Confidence has decreased on the potential for strong winds and low humidity lasting for a minimum of 6 hours across the Owens Valley and Eastern Sierra Thursday. Winds may gust over 35-40 mph, but are not expected to last more than a few hours and should be isolated to mainly westerly wind-prone areas. $$ AZZ101-102-CAZ228-229-NVZ461-463>466-191200- /O.UPG.KVEF.FW.A.0005.210519T1900Z-210521T0600Z/ /O.NEW.KVEF.FW.W.0009.210519T1800Z-210521T1200Z/ /O.NEW.KVEF.FW.A.0006.210521T1200Z-210522T0600Z/ Lake Mead NRA/Colorado River-AZ side- Northwest Deserts/Northwest Plateau- Mojave Desert Including Morongo Valley/Yucca Valley- Lower Colorado River Valley-Lincoln County/Ely Dispatch- Sheep Range-Spring Mountains- Clark and SW Lincoln County Deserts/Las Vegas Dispatch- Lake Mead NRA/Colorado River-NV side- 309 PM PDT Tue May 18 2021 /309 PM MST Tue May 18 2021/ ...A RED FLAG WARNING IS IN EFFECT FROM 11 AM PDT /11 AM MST/ WEDNESDAY TO 5 AM PDT /5 AM MST/ FRIDAY FOR STRONG WINDS AND LOW HUMIDITY... ...A FIRE WEATHER WATCH IS IN EFFECT FROM EARLY FRIDAY MORNING THROUGH EARLY SATURDAY MORNING FOR STRONG WINDS AND LOW HUMIDITY... The National Weather Service in Las Vegas has issued a Red Flag Warning, which is in effect from 11 AM PDT /11 AM MST/ Wednesday to 5 AM PDT /5 AM MST/ Friday. A Fire Weather Watch has also been issued. This Fire Weather Watch is in effect from early Friday morning through early Saturday morning. * AFFECTED AREA...In Arizona...Fire weather zone 101 and 102. In California...Fire weather zone 228 and 229. In Nevada...Fire weather zones 461, 463, 464, 465, and 466. * TIMING...A Red Flag Warning is in effect from 11 AM PDT/MST Wednesday afternoon until 5 AM PDT/MST Friday morning. A Fire Weather Watch is in effect from 5 AM Friday through 5 AM Saturday. * WIND...South to southwest winds 20-25 mph gusting around 35-45 mph Wednesday increasing to 25-35 mph with gusts 40-50 mph Thursday. Strongest winds are expected across western San Bernardino County where gusts to 45-55 mph are possible. Winds and dry conditions may persist into Friday. * HUMIDITY...Relative humidity values be in the single digits both Wednesday and Thursday, with marginal overnight recovery. Relative humidity could increase marginally but may remain below 20-15 percent Friday. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Make outdoor plans accordingly and 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. A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ NVZ462-191200- /O.UPG.KVEF.FW.A.0005.210520T1500Z-210521T0600Z/ /O.NEW.KVEF.FW.W.0009.210519T1800Z-210521T1200Z/ Nye County Deserts/Las Vegas Dispatch- 309 PM PDT Tue May 18 2021 ...RED FLAG WARNING IN EFFECT FROM 11 AM WEDNESDAY TO 5 AM PDT FRIDAY FOR STRONG WINDS AND LOW HUMIDITY... The National Weather Service in Las Vegas has issued a Red Flag Warning, which is in effect from 11 AM Wednesday to 5 AM PDT Friday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...In Nevada...Fire weather zones 462. * TIMING...11 AM PDT Wednesday morning until 5 AM PDT Friday morning. * WIND...South-southwest winds 25-35 mph with gusts 40-50 mph. * HUMIDITY...Relative humidity values will mostly be in the single digits on Wednesday and Thursday afternoons. Relative humidity will marginally recover overnight, better overnight recovery is expected Thursday night into early Friday. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Make outdoor plans accordingly, and 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. && $$ CAZ227-NVZ460-191200- /O.UPG.KVEF.FW.A.0005.210520T1500Z-210521T0600Z/ /O.NEW.KVEF.FW.W.0009.210520T1800Z-210521T1200Z/ Death Valley National Park- Esmeralda and Nye County Deserts/CNC Dispatch- 309 PM PDT Tue May 18 2021 ...RED FLAG WARNING IN EFFECT FROM 11 AM THURSDAY TO 5 AM PDT FRIDAY FOR STRONG WINDS AND LOW HUMIDITY... The National Weather Service in Las Vegas has issued a Red Flag Warning, which is in effect from 11 AM Thursday to 5 AM PDT Friday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...In Nevada...Fire weather zones 460. In California...Fire weather zone 227. * TIMING...11 AM PDT Thursday morning until 5 AM PDT Friday morning. * WIND...South-southwest winds 25-35 mph with gusts 40-50 mph. * HUMIDITY...Relative humidity values will be in the single digits on Thursday. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Make outdoor plans accordingly, and heed all fire restrictions. && PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ weather.gov/lasvegas
7 follow-up statements
469 WWUS85 KVEF 191056 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 356 AM PDT Wed May 19 2021 .Gusty south to southwest winds will combine with very dry conditions across the Mojave Desert of southeast California and parts of southern Nevada and northwest Arizona today. Southwest winds will become stronger with gusts 40 to 50 mph expanding across most of the region on Thursday leading to widespread very high or extreme fire danger. Winds are expected to remain gusty through much of Friday across portions of the region. AZZ101-102-CAZ228-229-NVZ461-463>466-192200- /O.CON.KVEF.FW.W.0009.210519T1800Z-210521T1200Z/ /O.CON.KVEF.FW.A.0006.210521T1200Z-210522T0600Z/ Lake Mead NRA/Colorado River-AZ side- Northwest Deserts/Northwest Plateau- Mojave Desert Including Morongo Valley/Yucca Valley- Lower Colorado River Valley-Lincoln County/Ely Dispatch- Sheep Range-Spring Mountains- Clark and SW Lincoln County Deserts/Las Vegas Dispatch- Lake Mead NRA/Colorado River-NV side- 356 AM PDT Wed May 19 2021 /356 AM MST Wed May 19 2021/ ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM PDT /11 AM MST/ THIS MORNING TO 5 AM PDT /5 AM MST/ FRIDAY FOR STRONG WINDS AND LOW HUMIDITY... ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM LATE THURSDAY NIGHT THROUGH FRIDAY EVENING FOR STRONG WINDS AND LOW HUMIDITY... The National Weather Service in Las Vegas has issued a Red Flag Warning, which is in effect from 11 AM PDT /11 AM MST/ today to 5 AM PDT /5 AM MST/ Friday. A Fire Weather Watch has also been issued. This Fire Weather Watch is in effect from early Friday morning through early Saturday morning. * AFFECTED AREA...In Arizona...Fire weather zone 101 and 102. In California...Fire weather zone 228 and 229. In Nevada... Fire weather zones 461, 463, 464, 465, and 466. * TIMING...A Red Flag Warning is in effect from 11 AM PDT/MST today until 5 AM PDT/MST Friday morning. A Fire Weather Watch is in effect from 5 AM Friday through 5 AM Saturday. * WIND...South to southwest winds 20-25 mph gusting around 35-45 mph today increasing to 25-35 mph with gusts 40-50 mph Thursday. Strongest winds are expected across western San Bernardino County where gusts to 45-55 mph are possible. Winds and dry conditions may persist into Friday. * HUMIDITY...Relative humidity values will be in the single digits both today and Thursday, with marginal overnight recovery. Relative humidity could increase marginally but should remain below 15 percent for the lower elevations Friday. PRECAUTIONARY/PREPAREDNESS ACTIONS... Make outdoor plans accordingly, use extra caution with any ignition sources and heed all fire restrictions. && $$ NVZ462-192200- /O.CON.KVEF.FW.W.0009.210519T1800Z-210521T1200Z/ Nye County Deserts/Las Vegas Dispatch- 356 AM PDT Wed May 19 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 5 AM PDT FRIDAY FOR STRONG WINDS AND LOW HUMIDITY... * AFFECTED AREA...In Nevada...Fire weather zones 462. * TIMING...11 AM PDT today until 5 AM PDT Friday morning. * WIND...South-southwest winds 25-35 mph with gusts 40-50 mph. * HUMIDITY...Relative humidity values will mostly be in the single digits on Wednesday and Thursday afternoons. Relative humidity will marginally recover overnight, better overnight recovery is expected Thursday night into early Friday. PRECAUTIONARY/PREPAREDNESS ACTIONS... Make outdoor plans accordingly, use extra caution with any ignition sources and heed all fire restrictions. && $$ CAZ227-NVZ460-192200- /O.CON.KVEF.FW.W.0009.210520T1800Z-210521T1200Z/ Death Valley National Park- Esmeralda and Nye County Deserts/CNC Dispatch- 356 AM PDT Wed May 19 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THURSDAY TO 5 AM PDT FRIDAY FOR STRONG WINDS AND LOW HUMIDITY... * AFFECTED AREA...In Nevada...Fire weather zones 460. In California...Fire weather zone 227. * TIMING...11 AM PDT Thursday morning until 5 AM PDT Friday morning. * WIND...South-southwest winds 25-35 mph with gusts 40-50 mph. * HUMIDITY...Relative humidity values will be in the single digits on Thursday. PRECAUTIONARY/PREPAREDNESS ACTIONS... Make outdoor plans accordingly, use extra caution with any ignition sources and heed all fire restrictions. && $$ weather.gov/lasvegas
835 WWUS85 KVEF 191812 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 1112 AM PDT Wed May 19 2021 .Gusty south to southwest winds will combine with very dry conditions across the Mojave Desert of southeast California and parts of southern Nevada and northwest Arizona today. Southwest winds will become stronger with gusts 40 to 50 mph expanding across most of the region on Thursday leading to widespread very high or extreme fire danger. Winds are expected to remain gusty through much of Friday across portions of the region. AZZ101-102-CAZ228-229-NVZ461-463>466-201200- /O.CON.KVEF.FW.W.0009.000000T0000Z-210521T1200Z/ /O.CON.KVEF.FW.A.0006.210521T1200Z-210522T0600Z/ Lake Mead NRA/Colorado River-AZ side- Northwest Deserts/Northwest Plateau- Mojave Desert Including Morongo Valley/Yucca Valley- Lower Colorado River Valley-Lincoln County/Ely Dispatch- Sheep Range-Spring Mountains- Clark and SW Lincoln County Deserts/Las Vegas Dispatch- Lake Mead NRA/Colorado River-NV side- 1112 AM PDT Wed May 19 2021 /1112 AM MST Wed May 19 2021/ ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 AM PDT /5 AM MST/ FRIDAY FOR STRONG WINDS AND LOW HUMIDITY... ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM FRIDAY MORNING THROUGH SATURDAY MORNING FOR STRONG WINDS AND LOW HUMIDITY... * AFFECTED AREA...In Arizona...Fire weather zone 101 and 102. In California...Fire weather zone 228 and 229. In Nevada... Fire weather zones 461, 463, 464, 465, and 466. * TIMING...A Red Flag Warning is in effect through until 5 AM PDT/MST Friday morning. A Fire Weather Watch is in effect from 5 AM Friday through 5 AM Saturday. * WIND...South to southwest winds 20-25 mph gusting around 35-45 mph today increasing to 25-35 mph with gusts 40-50 mph Thursday. Strongest winds are expected across western San Bernardino County where gusts to 45-55 mph are possible. Winds and dry conditions may persist into Friday. * HUMIDITY...Relative humidity values will be in the single digits both today and Thursday, with marginal overnight recovery. Relative humidity could increase marginally but should remain below 15 percent for the lower elevations Friday. PRECAUTIONARY/PREPAREDNESS ACTIONS... Make outdoor plans accordingly, use extra caution with any ignition sources and heed all fire restrictions. && $$ NVZ462-201200- /O.CON.KVEF.FW.W.0009.000000T0000Z-210521T1200Z/ Nye County Deserts/Las Vegas Dispatch- 1112 AM PDT Wed May 19 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 AM PDT FRIDAY FOR STRONG WINDS AND LOW HUMIDITY... * AFFECTED AREA...In Nevada...Fire weather zones 462. * TIMING...until 5 AM PDT Friday morning. * WIND...South-southwest winds 25-35 mph with gusts 40-50 mph. * HUMIDITY...Relative humidity values will mostly be in the single digits this afternoon and Thursday afternoon. Relative humidity will marginally recover overnight, better overnight recovery is expected Thursday night into early Friday. PRECAUTIONARY/PREPAREDNESS ACTIONS... Make outdoor plans accordingly, use extra caution with any ignition sources and heed all fire restrictions. && $$ CAZ227-NVZ460-201200- /O.CON.KVEF.FW.W.0009.210520T1800Z-210521T1200Z/ Death Valley National Park- Esmeralda and Nye County Deserts/CNC Dispatch- 1112 AM PDT Wed May 19 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THURSDAY TO 5 AM PDT FRIDAY FOR STRONG WINDS AND LOW HUMIDITY... * AFFECTED AREA...In Nevada...Fire weather zones 460. In California...Fire weather zone 227. * TIMING...11 AM PDT Thursday morning until 5 AM PDT Friday morning. * WIND...South-southwest winds 25-35 mph with gusts 40-50 mph. * HUMIDITY...Relative humidity values will be in the single digits on Thursday. PRECAUTIONARY/PREPAREDNESS ACTIONS... Make outdoor plans accordingly, use extra caution with any ignition sources and heed all fire restrictions. && $$ weather.gov/lasvegas
287 WWUS85 KVEF 201044 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 344 AM PDT Thu May 20 2021 AZZ101-CAZ228-229-NVZ461-463>466-202200- /O.CAN.KVEF.FW.A.0006.210521T1200Z-210522T0600Z/ /O.EXT.KVEF.FW.W.0009.000000T0000Z-210521T0600Z/ Lake Mead NRA/Colorado River-AZ side- Mojave Desert Including Morongo Valley/Yucca Valley- Lower Colorado River Valley-Lincoln County/Ely Dispatch- Sheep Range-Spring Mountains- Clark and SW Lincoln County Deserts/Las Vegas Dispatch- Lake Mead NRA/Colorado River-NV side- 344 AM PDT Thu May 20 2021 /344 AM MST Thu May 20 2021/ ...RED FLAG WARNING NOW IN EFFECT UNTIL 11 PM PDT /11 PM MST/ THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY FOR SOUTHERN NEVADA...THE LAKE MEAD NATIONAL RECREATION AREA...AND THE MOJAVE DESERT OF SOUTHEAST CALIFORNIA... ...FIRE WEATHER WATCH FRIDAY IS CANCELLED FOR THESE AREAS... * AFFECTED AREA...In Arizona...Fire weather zone 101. In California...Fire weather zone 228 and 229. In Nevada... Fire weather zones 461, 463, 464, 465, and 466. * TIMING...A Red Flag Warning is in effect until 11 PM PDT/MST this evening. * WIND...South to southwest winds 25 to 35 mph with gusts 40 to 50 mph. The strongest winds are expected across western San Bernardino County where gusts 45 to 55 mph are possible. * HUMIDITY...Minimum relative humidity values will be in the single digits. PRECAUTIONARY/PREPAREDNESS ACTIONS... A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. Make outdoor plans accordingly, use extra caution with any ignition sources and heed all fire restrictions. && $$ AZZ102-202200- /O.UPG.KVEF.FW.A.0006.210521T1200Z-210522T0600Z/ /O.NEW.KVEF.FW.W.0010.210521T1800Z-210522T0300Z/ /O.EXT.KVEF.FW.W.0009.000000T0000Z-210521T0600Z/ Northwest Deserts/Northwest Plateau- 344 AM MST Thu May 20 2021 ...RED FLAG WARNING NOW IN EFFECT UNTIL 11 PM MST THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY FOR NORTHWEST ARIZONA... ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 8 PM MST FRIDAY FOR STRONG WINDS AND LOW HUMIDITY FOR NORTHWEST ARIZONA... The National Weather Service in Las Vegas has issued a Red Flag Warning, which is in effect from 11 AM to 8 PM MST Friday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...In Arizona...zone 102. * TIMING...A Red Flag Warning is in effect until 11 PM MST this evening then again from 11 AM until 8 PM MST Friday. * WIND...South to southwest winds 25 to 35 mph with gusts 40 to 50 mph today. Southwest winds gusting 35 to 40 mph will persist Friday. * HUMIDITY...Minimum relative humidity values will be in the single digits today with marginal overnight recovery then will remain below 15 percent Friday. PRECAUTIONARY/PREPAREDNESS ACTIONS... A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. Make outdoor plans accordingly, use extra caution with any ignition sources and heed all fire restrictions. && $$ NVZ462-202200- /O.EXT.KVEF.FW.W.0009.000000T0000Z-210521T0600Z/ Nye County Deserts/Las Vegas Dispatch- 344 AM PDT Thu May 20 2021 ...RED FLAG WARNING NOW IN EFFECT UNTIL 11 PM PDT THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY FOR THE NYE COUNTY DESERTS... * AFFECTED AREA...In Nevada...Fire weather zone 462. * TIMING...until 11 PM PDT this evening. * WIND...South to southwest winds 25 to 35 mph with gusts 40-50 mph this afternoon then becoming northwest this evening. * HUMIDITY...Relative humidity values will mostly be in the single digits this afternoon. Good recovery is expected late tonight and Friday. PRECAUTIONARY/PREPAREDNESS ACTIONS... A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. Make outdoor plans accordingly, use extra caution with any ignition sources and heed all fire restrictions. && $$ CAZ227-NVZ460-202200- /O.EXT.KVEF.FW.W.0009.210520T1800Z-210521T0600Z/ Death Valley National Park- Esmeralda and Nye County Deserts/CNC Dispatch- 344 AM PDT Thu May 20 2021 ...RED FLAG WARNING NOW IN EFFECT FROM 11 AM THIS MORNING TO 11 PM PDT THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY FOR DEATH VALLEY NATIONAL PARK... * AFFECTED AREA...In California...Fire weather zone 227. * TIMING...11 AM PDT this morning until 11 PM PDT this evening. * WIND...South to southwest winds 25-35 mph with gusts 40-50 mph becoming northwest late this afternoon and evening. * HUMIDITY...Minimum relative humidity values will be in the single digits. PRECAUTIONARY/PREPAREDNESS ACTIONS... A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. Make outdoor plans accordingly, use extra caution with any ignition sources and heed all fire restrictions. && $$ weather.gov/lasvegas
561 WWUS85 KVEF 201052 CCA RFWVEF URGENT - FIRE WEATHER MESSAGE...CORRECTED National Weather Service Las Vegas NV 352 AM PDT Thu May 20 2021 AZZ101-CAZ228-229-NVZ461-463>466-202200- /O.CAN.KVEF.FW.A.0006.210521T1200Z-210522T0600Z/ /O.EXT.KVEF.FW.W.0009.000000T0000Z-210521T0600Z/ Lake Mead NRA/Colorado River-AZ side- Mojave Desert Including Morongo Valley/Yucca Valley- Lower Colorado River Valley-Lincoln County/Ely Dispatch- Sheep Range-Spring Mountains- Clark and SW Lincoln County Deserts/Las Vegas Dispatch- Lake Mead NRA/Colorado River-NV side- 352 AM PDT Thu May 20 2021 /352 AM MST Thu May 20 2021/ ...RED FLAG WARNING NOW IN EFFECT UNTIL 11 PM PDT /11 PM MST/ THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY FOR SOUTHERN NEVADA...THE LAKE MEAD NATIONAL RECREATION AREA...AND THE MOJAVE DESERT OF SOUTHEAST CALIFORNIA... ...FIRE WEATHER WATCH FRIDAY IS CANCELLED FOR THESE AREAS... * AFFECTED AREA...In Arizona...Fire weather zone 101. In California...Fire weather zone 228 and 229. In Nevada... Fire weather zones 461, 463, 464, 465, and 466. * TIMING...A Red Flag Warning is in effect until 11 PM PDT/MST this evening. * WIND...South to southwest winds 25 to 35 mph with gusts 40 to 50 mph. The strongest winds are expected across western San Bernardino County where gusts 45 to 55 mph are possible. * HUMIDITY...Minimum relative humidity values will be in the single digits. PRECAUTIONARY/PREPAREDNESS ACTIONS... A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. Make outdoor plans accordingly, use extra caution with any ignition sources and heed all fire restrictions. && $$ AZZ102-202200- /O.UPG.KVEF.FW.A.0006.210521T1200Z-210522T0600Z/ /O.NEW.KVEF.FW.W.0010.210521T1800Z-210522T0300Z/ /O.EXT.KVEF.FW.W.0009.000000T0000Z-210521T0600Z/ Northwest Deserts/Northwest Plateau- 352 AM MST Thu May 20 2021 ...RED FLAG WARNING NOW IN EFFECT UNTIL 11 PM MST THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY FOR NORTHWEST ARIZONA... ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 8 PM MST FRIDAY FOR STRONG WINDS AND LOW HUMIDITY FOR NORTHWEST ARIZONA... The National Weather Service in Las Vegas has issued a Red Flag Warning, which is in effect from 11 AM to 8 PM MST Friday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...In Arizona...zone 102. * TIMING...A Red Flag Warning is in effect until 11 PM MST this evening then again from 11 AM until 8 PM MST Friday. * WIND...South to southwest winds 25 to 35 mph with gusts 40 to 50 mph today. Southwest winds gusting 35 to 40 mph will persist Friday. * HUMIDITY...Minimum relative humidity values will be in the single digits today with marginal overnight recovery then will remain below 15 percent Friday. PRECAUTIONARY/PREPAREDNESS ACTIONS... A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. Make outdoor plans accordingly, use extra caution with any ignition sources and heed all fire restrictions. && $$ NVZ462-202200- /O.EXT.KVEF.FW.W.0009.000000T0000Z-210521T0600Z/ Nye County Deserts/Las Vegas Dispatch- 352 AM PDT Thu May 20 2021 ...RED FLAG WARNING NOW IN EFFECT UNTIL 11 PM PDT THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY FOR THE NYE COUNTY DESERTS... * AFFECTED AREA...In Nevada...Fire weather zone 462. * TIMING...until 11 PM PDT this evening. * WIND...South to southwest winds 25 to 35 mph with gusts 40-50 mph this afternoon then becoming northwest this evening. * HUMIDITY...Relative humidity values will mostly be in the single digits this afternoon. Good recovery is expected late tonight and Friday. PRECAUTIONARY/PREPAREDNESS ACTIONS... A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. Make outdoor plans accordingly, use extra caution with any ignition sources and heed all fire restrictions. && $$ CAZ227-NVZ460-202200- /O.COR.KVEF.FW.W.0009.210520T1800Z-210521T0600Z/ Death Valley National Park- Esmeralda and Nye County Deserts/CNC Dispatch- 352 AM PDT Thu May 20 2021 ...RED FLAG WARNING NOW IN EFFECT FROM 11 AM THIS MORNING TO 11 PM PDT THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY FOR DEATH VALLEY NATIONAL PARK AND ESMERALDA AND NYE COUNTY DESERTS... * AFFECTED AREA...In California...Fire weather zone 227. In Nevada...Fire Weather Zone 460. * TIMING...11 AM PDT this morning until 11 PM PDT this evening. * WIND...Southwest to west winds winds 25 to 35 mph with gusts 40 to 50 mph becoming northwest late this afternoon and evening. * HUMIDITY...Minimum relative humidity values will be in the single digits. PRECAUTIONARY/PREPAREDNESS ACTIONS... A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. Make outdoor plans accordingly, use extra caution with any ignition sources and heed all fire restrictions. && $$ weather.gov/lasvegas
976 WWUS85 KVEF 202150 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 250 PM PDT Thu May 20 2021 AZZ102-210700- /O.CON.KVEF.FW.W.0009.000000T0000Z-210521T0600Z/ /O.CON.KVEF.FW.W.0010.210521T1800Z-210522T0300Z/ Northwest Deserts/Northwest Plateau- 250 PM MST Thu May 20 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY FOR NORTHWEST ARIZONA... ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 8 PM MST FRIDAY FOR STRONG WINDS AND LOW HUMIDITY FOR NORTHWEST ARIZONA... The National Weather Service in Las Vegas has issued a Red Flag Warning, which is in effect from 11 AM to 8 PM MST Friday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...In Arizona...zone 102. * TIMING...A Red Flag Warning is in effect until 11 PM MST this evening then again from 11 AM until 8 PM MST Friday. * WIND...South to southwest winds 25 to 35 mph with gusts 40 to 50 mph today. Southwest winds gusting 35 to 40 mph will persist Friday. * HUMIDITY...Minimum relative humidity values will be in the single digits today with marginal overnight recovery then will remain below 15 percent Friday. PRECAUTIONARY/PREPAREDNESS ACTIONS... A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. Make outdoor plans accordingly, use extra caution with any ignition sources and heed all fire restrictions. && $$ AZZ101-CAZ227>229-NVZ460>466-210600- /O.CON.KVEF.FW.W.0009.000000T0000Z-210521T0600Z/ Lake Mead NRA/Colorado River-AZ side-Death Valley National Park- Mojave Desert Including Morongo Valley/Yucca Valley- Lower Colorado River Valley- Esmeralda and Nye County Deserts/CNC Dispatch- Lincoln County/Ely Dispatch-Nye County Deserts/Las Vegas Dispatch- Sheep Range-Spring Mountains- Clark and SW Lincoln County Deserts/Las Vegas Dispatch- Lake Mead NRA/Colorado River-NV side- 250 PM PDT Thu May 20 2021 /250 PM MST Thu May 20 2021/ ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT /11 PM MST/ THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY FOR THE NYE COUNTY DESERTS... * AFFECTED AREA...In Nevada...Fire weather zone 462. * TIMING...until 11 PM PDT this evening. * WIND...South to southwest winds 25 to 35 mph with gusts 40-50 mph this afternoon then becoming northwest this evening. * HUMIDITY...Relative humidity values will mostly be in the single digits this afternoon. Good recovery is expected late tonight and Friday. PRECAUTIONARY/PREPAREDNESS ACTIONS... A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. Make outdoor plans accordingly, use extra caution with any ignition sources and heed all fire restrictions. && $$
071 WWUS85 KVEF 210541 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 1041 PM PDT Thu May 20 2021 .The Red Flag Warning has been extended until 2 AM Friday morning. Gusty winds 35 to 50 mph late this evening will gradually decrease overnight to between 15 and 25 mph for most of the region. AZZ102-210900- /O.EXT.KVEF.FW.W.0009.000000T0000Z-210521T0900Z/ /O.CON.KVEF.FW.W.0010.210521T1800Z-210522T0300Z/ Northwest Deserts/Northwest Plateau- 1041 PM MST Thu May 20 2021 ...RED FLAG WARNING NOW IN EFFECT UNTIL 2 AM MST FRIDAY FOR STRONG WINDS AND LOW HUMIDITY FOR NORTHWEST ARIZONA......RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 8 PM MST FRIDAY FOR STRONG WINDS AND LOW HUMIDITY FOR NORTHWEST ARIZONA... * AFFECTED AREA...In Arizona...zone 102. * TIMING...A Red Flag Warning has been extended until 2 AM MST Friday morning. A Red Flag Warning remains in effect again from 11 AM until 8 PM MST Friday. * WIND...South to southwest winds 25 to 35 mph with gusts 40 to 50 mph. Southwest winds gusting 35 to 40 mph will persist Friday. * HUMIDITY...Relative humidity will have poor or marginal overnight recovery then will remain below 15 percent Friday. PRECAUTIONARY/PREPAREDNESS ACTIONS... A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. Make outdoor plans accordingly, use extra caution with any ignition sources and heed all fire restrictions. && $$ AZZ101-CAZ227>229-NVZ460>466-210900- /O.EXT.KVEF.FW.W.0009.000000T0000Z-210521T0900Z/ Lake Mead NRA/Colorado River-AZ side-Death Valley National Park- Mojave Desert Including Morongo Valley/Yucca Valley- Lower Colorado River Valley- Esmeralda and Nye County Deserts/CNC Dispatch- Lincoln County/Ely Dispatch-Nye County Deserts/Las Vegas Dispatch- Sheep Range-Spring Mountains- Clark and SW Lincoln County Deserts/Las Vegas Dispatch- Lake Mead NRA/Colorado River-NV side- 1041 PM PDT Thu May 20 2021 /1041 PM MST Thu May 20 2021/ ...RED FLAG WARNING NOW IN EFFECT UNTIL 2 AM PDT /2 AM MST/ FRIDAY FOR STRONG WINDS AND LOW HUMIDITY FOR THE NYE COUNTY DESERTS... * AFFECTED AREA...In Nevada...Fire weather zone 462. * TIMING...Extended until 2 AM Friday morning. * WIND...South to southwest winds 25 to 35 mph with gusts 40-50 mph this afternoon then becoming northwest this evening. * HUMIDITY...Good RH recovery is expected over south central Nevada late tonight and Friday. Recovery will be poor or marginal over the deserts of San Bernardino and Clark counties. PRECAUTIONARY/PREPAREDNESS ACTIONS... A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. Make outdoor plans accordingly, use extra caution with any ignition sources and heed all fire restrictions. && $$ weather.gov/lasvegas
731 WWUS85 KVEF 210902 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 202 AM PDT Fri May 21 2021 AZZ102-211800- /O.EXP.KVEF.FW.W.0009.000000T0000Z-210521T0900Z/ /O.CON.KVEF.FW.W.0010.210521T1800Z-210522T0300Z/ Northwest Deserts/Northwest Plateau- 202 AM MST Fri May 21 2021 ...RED FLAG WARNING WILL EXPIRE AT 2 AM MST EARLY THIS MORNING FOR STRONG WINDS AND LOW HUMIDITY FOR NORTHWEST ARIZONA... ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 8 PM MST TODAY FOR STRONG WINDS AND LOW HUMIDITY FOR NORTHWEST ARIZONA... * TIMING...Wind speeds will increase again late this morning through the afternoon and a Red Flag Warning will go into effect again from 11 AM this morning until 8 PM MST this evening. * WIND...Southwest winds gusting 35 to 40 mph. * HUMIDITY...Relative humidity will be below 15 percent late this morning through early this evening. PRECAUTIONARY/PREPAREDNESS ACTIONS... A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. Make outdoor plans accordingly, use extra caution with any ignition sources and heed all fire restrictions. && $$ AZZ101-CAZ227>229-NVZ460>466-211015- /O.EXP.KVEF.FW.W.0009.000000T0000Z-210521T0900Z/ Lake Mead NRA/Colorado River-AZ side-Death Valley National Park- Mojave Desert Including Morongo Valley/Yucca Valley- Lower Colorado River Valley- Esmeralda and Nye County Deserts/CNC Dispatch- Lincoln County/Ely Dispatch-Nye County Deserts/Las Vegas Dispatch- Sheep Range-Spring Mountains- Clark and SW Lincoln County Deserts/Las Vegas Dispatch- Lake Mead NRA/Colorado River-NV side- 202 AM PDT Fri May 21 2021 /202 AM MST Fri May 21 2021/ ...RED FLAG WARNING WILL EXPIRE AT 2 AM PDT /2 AM MST/ EARLY THIS MORNING FOR STRONG WINDS AND LOW HUMIDITY FOR THE NYE COUNTY DESERTS... Wind speeds will continue decrease overnight though west to southwest winds gusting 30 to 35 mph will persist for many sites with poor or marginal RH recovery over the desert areas. $$ 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 18, 3:09 PM MST | Fire Weather Watch | VEF | Mohave | 37 hr |
| May 18, 3:22 PM MST | Wind Advisory | VEF | Mohave | 59 hr |
Nearby
Red Flag Warnings in Nevada, 2021Red Flag Warnings in California, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.