Alert archive / Arizona / Red Flag Warnings in 2017
Red Flag Warning 2, NWS Las Vegas, NV
NWS Las Vegas, NV issued this red flag warning at Apr 27, 2017, 1:55 PM MST for Mohave County, Arizona; San Bernardino County, California; Clark County, Nevada. It took effect at Apr 28, 2017, 11:00 AM MST. It was in force for 34 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 27, 2017, 1:55 PM MST (20:55 UTC)
- In effect from
- Apr 28, 2017, 11:00 AM MST
- Expired
- Apr 29, 2017, 9:15 PM MST
- In force
- 34 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 20:59 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, 8.9 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
- 0 m above ground
- 0-6 km bulk shear
- 69 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 160 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
578 WWUS85 KVEF 272055 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 155 PM PDT Thu Apr 27 2017 .Strong north winds and very dry air will combine to produce critical fire weather conditions in the Colorado River Valley Friday and Saturday. AZZ101-CAZ229-NVZ466-281100- /O.UPG.KVEF.FW.A.0001.170428T1800Z-170430T0600Z/ /O.NEW.KVEF.FW.W.0002.170428T1800Z-170430T0600Z/ Lake Mead NRA/Colorado River-AZ side-Lower Colorado River Valley- Lake Mead NRA/Colorado River-NV side- 155 PM PDT Thu Apr 27 2017 /155 PM MST Thu Apr 27 2017/ ...RED FLAG WARNING IN EFFECT FROM 11 AM PDT /11 AM MST/ FRIDAY TO 11 PM PDT /11 PM MST/ SATURDAY 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/ Friday to 11 PM PDT /11 PM MST/ Saturday. The Fire Weather Watch is no longer in effect. * TIMING...Strong winds will begin early Friday morning, peak Friday afternoon, and possibly lull Friday night before picking up again during the day Saturday. Winds will decrease Saturday night. * WIND...North winds gusting to 40 to 50 mph on Friday and Saturday, with locally higher gusts possible Friday afternoon and evening. * HUMIDITY...Five to 10 percent each afternoon. * 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. && $$ Berc weather.gov/lasvegas
5 follow-up statements
693 WWUS85 KVEF 280942 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 242 AM PDT Fri Apr 28 2017 .Strong north winds and very dry air will combine to produce critical fire weather conditions in the Colorado River Valley this morning through Saturday. AZZ101-CAZ229-NVZ466-282200- /O.CON.KVEF.FW.W.0002.170428T1800Z-170430T0600Z/ Lake Mead NRA/Colorado River-AZ side-Lower Colorado River Valley- Lake Mead NRA/Colorado River-NV side- 242 AM PDT Fri Apr 28 2017 /242 AM MST Fri Apr 28 2017/ ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM PDT /11 AM MST/ THIS MORNING TO 11 PM PDT /11 PM MST/ SATURDAY FOR STRONG WINDS AND LOW HUMIDITY... * TIMING...Strong north to northwest winds are expected through Saturday. Winds should peak this morning, then a brief lull is possible Friday night before picking up again during the day Saturday. Winds will decrease Saturday night. * WIND...North winds gusting to 40 to 50 mph today and Saturday, with locally higher gusts possible. * HUMIDITY...Five to 10 percent each afternoon. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ AA weather.gov/lasvegas
480 WWUS85 KVEF 281810 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 1110 AM PDT Fri Apr 28 2017 .Strong north winds and very dry air will combine to produce critical fire weather conditions in the Colorado River Valley through Saturday. AZZ101-CAZ229-NVZ466-291115- /O.CON.KVEF.FW.W.0002.000000T0000Z-170430T0600Z/ Lake Mead NRA/Colorado River-AZ side-Lower Colorado River Valley- Lake Mead NRA/Colorado River-NV side- 1110 AM PDT Fri Apr 28 2017 /1110 AM MST Fri Apr 28 2017/ ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT /11 PM MST/ SATURDAY FOR STRONG WINDS AND LOW HUMIDITY... * TIMING...Strong north to northwest winds are expected through Saturday. Winds should peak early this afternoon, then a brief lull is possible tonight before picking up again during the day Saturday. Winds will decrease Saturday night. * WIND...North winds gusting to 40 to 50 mph today and Saturday, with locally higher gusts possible. * HUMIDITY...Five to 10 percent each afternoon. * 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. && $$ weather.gov/lasvegas
539 WWUS85 KVEF 290932 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 232 AM PDT Sat Apr 29 2017 .Strong north winds and very dry air will combine to produce critical fire weather conditions in the Colorado River Valley into tonight. AZZ101-CAZ229-NVZ466-292300- /O.CON.KVEF.FW.W.0002.000000T0000Z-170430T0600Z/ Lake Mead NRA/Colorado River-AZ side-Lower Colorado River Valley- Lake Mead NRA/Colorado River-NV side- 232 AM PDT Sat Apr 29 2017 /232 AM MST Sat Apr 29 2017/ ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT /11 PM MST/ THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY... * TIMING...Strong north to northwest winds are expected through this afternoon. Winds should peak by late morning and early afternoon and then gradually diminish this evening. * WIND...North winds gusting to 40 to 50 mph. * HUMIDITY...5 to 10 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ weather.gov/lasvegas
188 WWUS85 KVEF 292255 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 355 PM PDT Sat Apr 29 2017 .Strong north winds and very dry air will combine to produce critical fire weather conditions in the Colorado River Valley into tonight. AZZ101-CAZ229-NVZ466-300600- /O.CON.KVEF.FW.W.0002.000000T0000Z-170430T0600Z/ Lake Mead NRA/Colorado River-AZ side-Lower Colorado River Valley- Lake Mead NRA/Colorado River-NV side- 355 PM PDT Sat Apr 29 2017 /355 PM MST Sat Apr 29 2017/ ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT /11 PM MST/ THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY... * TIMING...Gusty north winds have peaked and will gradually diminish this evening. * WIND...North winds gusting to 40 to 50 mph. * HUMIDITY...5 to 10 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. && $$ weather.gov/lasvegas
411 WWUS85 KVEF 300415 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 915 PM PDT Sat Apr 29 2017 AZZ101-CAZ229-NVZ466-300515- /O.CAN.KVEF.FW.W.0002.000000T0000Z-170430T0600Z/ Lake Mead NRA/Colorado River-AZ side-Lower Colorado River Valley- Lake Mead NRA/Colorado River-NV side- 915 PM PDT Sat Apr 29 2017 /915 PM MST Sat Apr 29 2017/ ...RED FLAG WARNING IS CANCELLED FOR STRONG WINDS AND LOW RH FOR FIRE WEATHER ZONES 101, 229, AND 466... The National Weather Service in Las Vegas has cancelled the Red Flag Warning. Winds have subsided down the Colorado River Valley and RH's are beginning to recover. Red Flag conditions are no longer expected this evening. $$ weather.gov/lasvegas
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 10:51 AM MST | Wind Advisory | VEF | Mohave | 54 hr |
Nearby
Red Flag Warnings in Arizona, 2017Red Flag Warnings in California, 2017Red Flag Warnings in Nevada, 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.