Alert archive / Nevada / Red Flag Warnings in 2021
Red Flag Warning 2, NWS Las Vegas, NV
NWS Las Vegas, NV issued this red flag warning at Apr 4, 2021, 1:49 PM PDT for Clark County, Lincoln County, Nevada. It took effect at Apr 5, 2021, 11:00 AM PDT. 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
- Apr 4, 2021, 1:49 PM PDT (20:49 UTC)
- In effect from
- Apr 5, 2021, 11:00 AM PDT
- Expired
- Apr 5, 2021, 8:00 PM PDT
- In force
- 9 hr
- Issued by
- NWS Las Vegas, NV
Counties Clark County, NV, Lincoln County, NV
The radar
The Las Vegas radar (KESX), 137 km from the middle of the area, began a volume at 20:54 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, 8.8 hours before the alert went out and 81 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
- 5047 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 108 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
148 WWUS85 KVEF 042049 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 149 PM PDT Sun Apr 4 2021 .A low pressure system moving across the Great Basin on Monday will bring strong southwest to west winds to the region. These strong winds coupled with very low relative humidity will result in critical fire weather conditions for NV-461 and elevated fire weather conditions elsewhere. NVZ461-051400- /O.UPG.KVEF.FW.A.0002.210405T1800Z-210406T0300Z/ /O.NEW.KVEF.FW.W.0002.210405T1800Z-210406T0300Z/ Lincoln County/Ely Dispatch- 149 PM PDT Sun Apr 4 2021 ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 8 PM PDT MONDAY FOR STRONG WINDS AND LOW RH FOR FIRE WEATHER ZONE 461... The National Weather Service in Las Vegas has issued a Red Flag Warning, which is in effect from 11 AM to 8 PM PDT Monday. This upgrades the previous Fire Weather Watch for this area. * TIMING...Winds will increase by late Monday morning and continue through the early evening before subsiding. * WIND...Southwest 20 to 25 mph with gusts up to 40 mph. * HUMIDITY...5 to 15 percent. * IMPACTS...With short term fuels approaching critically dry conditions, any small fires that develop could spread rapidly due to strong winds and very dry conditions. 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. && $$ weather.gov/lasvegas
3 follow-up statements
883 WWUS85 KVEF 050918 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 218 AM PDT Mon Apr 5 2021 .Strong southwest to west winds will develop across much of the region today as a low pressure system moves across the Great Basin. These strong winds coupled with very low relative humidity will result in critical fire weather conditions for areas of southern Nevada in Lincoln and Clark counties and elevated fire weather conditions elsewhere. NVZ465-052130- /O.EXB.KVEF.FW.W.0002.210405T2100Z-210406T0300Z/ Clark and SW Lincoln County Deserts/Las Vegas Dispatch- 218 AM PDT Mon Apr 5 2021 ...RED FLAG WARNING IN EFFECT FROM 2 PM THIS AFTERNOON TO 8 PM PDT THIS EVENING FOR STRONG WINDS AND LOW RH FOR FIRE WEATHER ZONE 465... The National Weather Service in Las Vegas has issued a Red Flag Warning, which is in effect from 2 PM this afternoon to 8 PM PDT this evening. * TIMING...Winds will increase late this morning and peak between 2 PM this afternoon and 8 PM this evening then decrease and become north overnight. * WIND...Southwest to west 20 to 25 mph with gusts 35 to 40 mph. * HUMIDITY...5 to 15 percent. * IMPACTS...Any small fires that develop could spread rapidly due to strong winds and critically dry fuels below 4000 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... Heed all fire restrictions. Outdoor burning is strongly discouraged. && $$ NVZ461-052130- /O.CON.KVEF.FW.W.0002.210405T1800Z-210406T0300Z/ Lincoln County/Ely Dispatch- 218 AM PDT Mon Apr 5 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 8 PM PDT THIS EVENING FOR STRONG WINDS AND LOW RH FOR FIRE WEATHER ZONE 461... * TIMING...Winds will increase late this morning and will continue through the early evening before decreasing and becoming north overnight. * WIND...West 20 to 25 mph with gusts 35 to 40 mph. * HUMIDITY...5 to 15 percent. * IMPACTS...Any small fires that develop could spread rapidly due to strong winds and very dry conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Heed all fire restrictions. Outdoor burning is strongly discouraged. && $$ weather.gov/lasvegas
105 WWUS85 KVEF 052041 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 141 PM PDT Mon Apr 5 2021 .Strong southwest to west winds will continue across much of the region today as a low pressure system moves across the Great Basin. These strong winds coupled with very low relative humidity will result in critical fire weather conditions for areas of southern Nevada in Lincoln and Clark counties and elevated fire weather conditions elsewhere. NVZ461-060300- /O.CON.KVEF.FW.W.0002.000000T0000Z-210406T0300Z/ Lincoln County/Ely Dispatch- 141 PM PDT Mon Apr 5 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING FOR STRONG WINDS AND LOW RH FOR FIRE WEATHER ZONE 461... * TIMING...Winds will remain gusty through 8 PM PDT this evening before decreasing and becoming north overnight. * WIND...West 20 to 25 mph with gusts 35 to 40 mph. * HUMIDITY...5 to 15 percent. * IMPACTS...Any small fires that develop could spread rapidly due to strong winds and very dry conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Heed all fire restrictions. Outdoor burning is strongly discouraged. && $$ NVZ465-060300- /O.CON.KVEF.FW.W.0002.210405T2100Z-210406T0300Z/ Clark and SW Lincoln County Deserts/Las Vegas Dispatch- 141 PM PDT Mon Apr 5 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING FOR STRONG WINDS AND LOW RH FOR FIRE WEATHER ZONE 465... * TIMING...Winds will remain gusty through 8 PM this evening then decrease and become north overnight. * WIND...Southwest to west 20 to 25 mph with gusts 35 to 40 mph. * HUMIDITY...5 to 15 percent. * IMPACTS...Any small fires that develop could spread rapidly due to strong winds and critically dry fuels below 4000 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... Heed all fire restrictions. Outdoor burning is strongly discouraged. && $$ weather.gov/lasvegas
539 WWUS85 KVEF 060241 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 741 PM PDT Mon Apr 5 2021 NVZ461-465-060345- /O.EXP.KVEF.FW.W.0002.000000T0000Z-210406T0300Z/ Lincoln County/Ely Dispatch- Clark and SW Lincoln County Deserts/Las Vegas Dispatch- 741 PM PDT Mon Apr 5 2021 ...RED FLAG WARNING WILL EXPIRE AT 8 PM PDT THIS EVENING FOR STRONG WINDS AND LOW RH FOR FIRE WEATHER ZONE 461... Gusty west and southwest winds have decreased below critical thresholds across much of Clark and Lincoln counties this evening. Elevated fire weather conditions will remain through the remainder of the evening as a surface cold front moves through the region which will bring breezy northwest winds. $$ weather.gov/lasvegas
Nearby
Red Flag Warnings in Nevada, 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.