Alert archive / Nevada / Red Flag Warnings in 2021
Red Flag Warning 22, NWS Las Vegas, NV
NWS Las Vegas, NV issued this red flag warning at Sep 12, 2021, 2:25 PM PDT for Clark County, Lincoln County, Nye County, Nevada. It took effect at Sep 13, 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
- Sep 12, 2021, 2:25 PM PDT (21:25 UTC)
- In effect from
- Sep 13, 2021, 11:00 AM PDT
- Expired
- Sep 13, 2021, 8:00 PM PDT
- In force
- 9 hr
- Issued by
- NWS Las Vegas, NV
Counties Clark County, NV, Lincoln County, NV, Nye County, NV
The radar
The Las Vegas radar (KESX), 185 km from the middle of the area, began a volume at 21:24 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, 9.4 hours before the alert went out and 103 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
- 3258 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- -32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
792 WWUS85 KVEF 122125 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 225 PM PDT Sun Sep 12 2021 NVZ464-465-131000- /O.NEW.KVEF.FW.W.0022.210913T1800Z-210914T0300Z/ Spring Mountains- Clark and SW Lincoln County Deserts/Las Vegas Dispatch- 225 PM PDT Sun Sep 12 2021 ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 8 PM PDT MONDAY FOR STRONG WINDS AND LOW HUMIDITY FOR MUCH OF CLARK COUNTY IN FIRE WEATHER ZONES 464 AND 465... 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. * AFFECTED AREA...In Nevada...Fire Weather Zones 464 and 465. * TIMING...Monday. Relative humidities will decline rapidly after sunrise, with breezy winds picking up late-morning and peaking in the afternoon before falling off after sunset. * WIND...South to southwest winds 20 to 25 mph with gusts 30 to 35 mph. * HUMIDITY...Minimum afternoon values of 5 to 8 percent; maximum overnight values of 12 to 18 percent Monday night into Tuesday morning. * 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. && $$ weather.gov/lasvegas
2 follow-up statements
904 WWUS85 KVEF 130911 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 211 AM PDT Mon Sep 13 2021 NVZ464-465-140300- /O.CON.KVEF.FW.W.0022.210913T1800Z-210914T0300Z/ Spring Mountains- Clark and SW Lincoln County Deserts/Las Vegas Dispatch- 211 AM PDT Mon Sep 13 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 8 PM PDT THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY FOR MUCH OF CLARK COUNTY IN FIRE WEATHER ZONES 464 AND 465... * AFFECTED AREA...In Nevada...Fire Weather Zones 464 and 465. * TIMING...Winds will pick up late this morning and peak in the afternoon before falling off after sunset. * WIND...South to southwest winds 20 to 25 mph with gusts 30 to 35 mph. * HUMIDITY...Minimum afternoon values of 5 to 8 percent recovering only to 12 to 18 percent tonight into Tuesday morning. * IMPACTS...A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. Any fires that develop will likely spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... Heed all fire restrictions. Outdoor burning is not recommended. && $$ weather.gov/lasvegas
985 WWUS85 KVEF 140241 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 741 PM PDT Mon Sep 13 2021 NVZ464-465-140345- /O.EXP.KVEF.FW.W.0022.000000T0000Z-210914T0300Z/ Spring Mountains- Clark and SW Lincoln County Deserts/Las Vegas Dispatch- 741 PM PDT Mon Sep 13 2021 ...RED FLAG WARNING WILL EXPIRE AT 8 PM PDT THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY FOR MUCH OF CLARK COUNTY IN FIRE WEATHER ZONES 464 AND 465... Although humidity levels will remain low, wind speeds have begun to decrease and are forecast to be weaker on Tuesday. The Red Flag Warning will be allowed to expire at 8 pm. $$ 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.