Alert archive / Nevada / Red Flag Warnings in 2021
Red Flag Warning 8, NWS Las Vegas, NV
NWS Las Vegas, NV issued this red flag warning at May 14, 2021, 12:39 PM PDT for Clark County, Lincoln County, Nye County, Nevada; Mohave County, Arizona. It took effect at May 15, 2021, 10:00 AM PDT. It was in force for 9 hr. 1 report 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 14, 2021, 12:39 PM PDT (19:39 UTC)
- In effect from
- May 15, 2021, 10:00 AM PDT
- Expired
- May 15, 2021, 7:00 PM PDT
- In force
- 9 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 19:43 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 15, 4:27 PM PDT | TSTM WND GST 66 | 38 Wsw Blue Eagle Ranch, NV | PANCAKE RAWS (PANN2), ELEVATION 5165 FEET. |
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, 7.7 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
- 3882 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- -3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
073 WWUS85 KVEF 141939 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 1239 PM PDT Fri May 14 2021 An approaching low pressure system will bring gusty south- southwesterly winds to the region. Coupled with cured fuels and critical relative humidity values, high fire danger is expected Saturday afternoon. AZZ101-102-NVZ461>466-151200- /O.NEW.KVEF.FW.W.0008.210515T1700Z-210516T0200Z/ Lake Mead NRA/Colorado River-AZ side- Northwest Deserts/Northwest Plateau-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- 1239 PM PDT Fri May 14 2021 /1239 PM MST Fri May 14 2021/ ...RED FLAG WARNING IN EFFECT FROM 10 AM PDT /10 AM MST/ TO 7 PM PDT /7 PM MST/ 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 10 AM PDT/MST to 7 PM PDT/MST Saturday. * AFFECTED AREA...In Arizona...Fire weather zones 101 and 102. In Nevada...Fire weather zones 461, 462, 463, 464, 465, and 466. * TIMING...From late Saturday morning through Saturday evening. * WIND...South-southwest winds 20-25 mph with gusts 30-40 mph. * HUMIDITY...Poor overnight recoveries Friday night will lead to afternoon relative humidity values in the single digits. Humidities will recover above 20% Saturday night. * 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. && $$ weather.gov/lasvegas
3 follow-up statements
243 WWUS85 KVEF 150913 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 213 AM PDT Sat May 15 2021 An approaching low pressure system will bring gusty south- southwesterly winds to the region. Coupled with cured fuels and critical relative humidity values, high fire danger is expected this afternoon. AZZ101-102-NVZ461>466-152100- /O.CON.KVEF.FW.W.0008.210515T1700Z-210516T0200Z/ Lake Mead NRA/Colorado River-AZ side- Northwest Deserts/Northwest Plateau-Lincoln County/Ely Dispatch- Nye County Deserts/Las Vegas Dispatch-Sheep Range- Spring Mountains- Clark and SW Lincoln County Deserts/Las Vegas Dispatch- Lake Mead NRA/Colorado River-NV side- 213 AM PDT Sat May 15 2021 /213 AM MST Sat May 15 2021/ ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM PDT /10 AM MST/ THIS MORNING TO 7 PM PDT /7 PM MST/ THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY FOR SOUTHERN NEVADA AND NORTHWEST ARIZONA... * AFFECTED AREA...In Arizona...Fire weather zones 101 and 102. In Nevada...Fire weather zones 461, 462, 463, 464, 465, and 466. * TIMING...From late this morning through this evening. * WIND...South-southwest winds 20-25 mph with gusts 30-40 mph. * HUMIDITY...Afternoon relative humidity values in the single digits are expected. Humidities will recover to above 20% overnight tonight. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ weather.gov/lasvegas
577 WWUS85 KVEF 151700 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 1000 AM PDT Sat May 15 2021 An approaching low pressure system will bring gusty south- southwesterly winds to the region. Coupled with cured fuels and critical relative humidity values, high fire danger is expected this afternoon. AZZ101-102-NVZ461>466-160200- /O.CON.KVEF.FW.W.0008.000000T0000Z-210516T0200Z/ Lake Mead NRA/Colorado River-AZ side- Northwest Deserts/Northwest Plateau-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- 1000 AM PDT Sat May 15 2021 /1000 AM MST Sat May 15 2021/ ...RED FLAG WARNING NOW IN EFFECT UNTIL 7 PM PDT / 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 461, 462, 463, 464, 465, and 466. * TIMING...Through this evening. * WIND...South-southwest winds 20-25 mph with gusts 30-40 mph. * HUMIDITY...Afternoon relative humidity values in the single digits are expected. Humidities will recover to above 20% overnight tonight. * 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. && $$ weather.gov/lasvegas
136 WWUS85 KVEF 160158 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 658 PM PDT Sat May 15 2021 AZZ101-102-NVZ461>466-160300- /O.EXP.KVEF.FW.W.0008.000000T0000Z-210516T0200Z/ Lake Mead NRA/Colorado River-AZ side- Northwest Deserts/Northwest Plateau-Lincoln County/Ely Dispatch- Nye County Deserts/Las Vegas Dispatch-Sheep Range- Spring Mountains- Clark and SW Lincoln County Deserts/Las Vegas Dispatch- Lake Mead NRA/Colorado River-NV side- 658 PM PDT Sat May 15 2021 /658 PM MST Sat May 15 2021/ ...RED FLAG WARNING WILL EXPIRE AT 7 PM PDT /7 PM MST/ THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY FOR SOUTHERN NEVADA AND NORTHWEST ARIZONA... The warning will be allowed to expire with winds expected to rapidly decrease as humidity levels rise above critical thresholds. There may be some localized areas where red flag conditions continue through 9 pm. $$ 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.