Alert archive / Nevada / Red Flag Warnings in 2017
Red Flag Warning 22, NWS Las Vegas, NV
NWS Las Vegas, NV issued this red flag warning at Dec 13, 2017, 1:59 PM PST for Clark County, Nevada; San Bernardino County, California; Mohave County, Arizona. It took effect at Dec 14, 2017, 8:00 AM PST. It was in force for 10 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
- Dec 13, 2017, 1:59 PM PST (21:59 UTC)
- In effect from
- Dec 14, 2017, 8:00 AM PST
- Expired
- Dec 14, 2017, 6:00 PM PST
- In force
- 10 hr
- Issued by
- NWS Las Vegas, NV
Counties Mohave County, AZ, San Bernardino County, CA, Clark County, NV
The radar
The Las Vegas radar (KESX), 15 km from the middle of the area, began a volume at 21:59 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, 10.0 hours before the alert went out and 101 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
- 4533 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 72 m²/s²
- 0-3 km storm-relative helicity
- 102 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
998 WWUS85 KVEF 132159 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 159 PM PST Wed Dec 13 2017 AZZ101-CAZ229-NVZ466-140600- /O.UPG.KVEF.FW.A.0008.171214T1600Z-171215T0200Z/ /O.NEW.KVEF.FW.W.0022.171214T1600Z-171215T0200Z/ Lake Mead NRA/Colorado River-AZ side-Lower Colorado River Valley- Lake Mead NRA/Colorado River-NV side- 159 PM PST Wed Dec 13 2017 /259 PM MST Wed Dec 13 2017/ ...RED FLAG WARNING IN EFFECT FROM 8 AM PST /9 AM MST/ TO 6 PM PST /7 PM MST/ THURSDAY FOR STRONG NORTH WINDS AND LOW RELATIVE HUMIDITY... The National Weather Service in Las Vegas has issued a Red Flag Warning, which is in effect from 8 AM PST /9 AM MST/ to 6 PM PST /7 PM MST/ Thursday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...In Arizona...Fire weather zone 101.In California...Fire weather zone 229.In Nevada...Fire weather zone 466. * TIMING...Winds will increase Thursday morning, peak in the latemorning and early afternoon before decreasing by evening time. * WIND...North 20 to 30 MPH with gusts up to 50 MPH. * HUMIDITY...10 to 15 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. && $$ weather.gov/lasvegas
3 follow-up statements
891 WWUS85 KVEF 140543 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 943 PM PST Wed Dec 13 2017 AZZ101-CAZ229-NVZ466-141200- /O.CON.KVEF.FW.W.0022.171214T1600Z-171215T0200Z/ Lake Mead NRA/Colorado River-AZ side-Lower Colorado River Valley- Lake Mead NRA/Colorado River-NV side- 943 PM PST Wed Dec 13 2017 /1043 PM MST Wed Dec 13 2017/ ...RED FLAG WARNING REMAINS IN EFFECT FROM 8 AM PST /9 AM MST/ TO 6 PM PST /7 PM MST/ THURSDAY FOR STRONG NORTH WINDS AND LOW RELATIVE HUMIDITY... * AFFECTED AREA...In Arizona...Fire weather zone 101.In California...Fire weather zone 229.In Nevada...Fire weather zone 466. * TIMING...Winds will increase early Thursday morning, peak in the late morning and early afternoon before gradually decreasing by evening. * WIND...North 20 to 35 MPH with gusts up to 50 MPH...especially near Laughlin and Bullhead City. * HUMIDITY...10 to 15 percent. * IMPACTS... A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. Any fires that develop will likely spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions will occur. Outdoor burning is not recommended. && $$ weather.gov/lasvegas
138 WWUS85 KVEF 141142 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 342 AM PST Thu Dec 14 2017 AZZ101-CAZ229-NVZ466-150200- /O.CON.KVEF.FW.W.0022.171214T1600Z-171215T0200Z/ Lake Mead NRA/Colorado River-AZ side-Lower Colorado River Valley- Lake Mead NRA/Colorado River-NV side- 342 AM PST Thu Dec 14 2017 /442 AM MST Thu Dec 14 2017/ ...RED FLAG WARNING REMAINS IN EFFECT FROM 8 AM PST /9 AM MST/ THIS MORNING TO 6 PM PST /7 PM MST/ THIS EVENING FOR STRONG NORTH WINDS AND LOW RELATIVE HUMIDITY... * AFFECTED AREA...In Arizona...Fire weather zone 101.In California...Fire weather zone 229.In Nevada...Fire weather zone 466. * TIMING...Winds will increase early this morning, peak in the late morning and early afternoon before gradually decreasing by evening. * WIND...North 20 to 35 MPH with gusts up to 50 MPH... especially near Laughlin and Bullhead City. * HUMIDITY...10 to 15 percent. * 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... A Red Flag Warning means that critical fire weather conditions will occur. Outdoor burning is not recommended. && $$ weather.gov/lasvegas
270 WWUS85 KVEF 150155 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 555 PM PST Thu Dec 14 2017 AZZ101-CAZ229-NVZ466-150300- /O.EXP.KVEF.FW.W.0022.000000T0000Z-171215T0200Z/ Lake Mead NRA/Colorado River-AZ side-Lower Colorado River Valley- Lake Mead NRA/Colorado River-NV side- 555 PM PST Thu Dec 14 2017 /655 PM MST Thu Dec 14 2017/ ...RED FLAG WARNING WILL EXPIRE AT 6 PM PST /7 PM MST/ THIS EVENING FOR STRONG NORTH WINDS AND LOW RELATIVE HUMIDITY... Wind speeds have decreased along the Colorado River Valley, but north winds gusting 20 to 30 mph will persist overnight. Relative humidity values will slowly recover to between 25 and 35 percent. $$ weather.gov/lasvegas
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 13, 2:37 AM PST | Wind Advisory | VEF | Clark | 39 hr |
| Dec 13, 2:41 AM PST | Fire Weather Watch | VEF | Clark | 11 hr |
Nearby
Red Flag Warnings in Nevada, 2017Red Flag Warnings in California, 2017Red Flag Warnings in Arizona, 2017Every red flag warning in 2017
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.