Alert archive / Arizona / Red Flag Warnings in 2021
Red Flag Warning 4, NWS Las Vegas, NV
NWS Las Vegas, NV issued this red flag warning at Apr 13, 2021, 12:34 PM MST for Mohave County, Arizona. It took effect at Apr 14, 2021, 12:00 PM MST. It was in force for 8 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 13, 2021, 12:34 PM MST (19:34 UTC)
- In effect from
- Apr 14, 2021, 12:00 PM MST
- Expired
- Apr 14, 2021, 8:00 PM MST
- In force
- 8 hr
- Issued by
- NWS Las Vegas, NV
County Mohave County, AZ
The radar
The Las Vegas radar (KESX), 102 km from the middle of the area, began a volume at 19:38 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, 7.6 hours before the alert went out and 177 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
- 3606 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 31 m²/s²
- 0-3 km storm-relative helicity
- 11 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
631 WWUS85 KVEF 131934 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 1234 PM PDT Tue Apr 13 2021 AZZ102-140500- /O.NEW.KVEF.FW.W.0004.210414T1900Z-210415T0300Z/ /O.CON.KVEF.FW.W.0003.000000T0000Z-210414T0500Z/ Northwest Deserts/Northwest Plateau- 1234 PM MST Tue Apr 13 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MST THIS EVENING AND ON WEDNESDAY FROM NOON TO 8 PM MST FOR STRONG WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE 102... The National Weather Service in Las Vegas has issued a Red Flag Warning, which is in effect from noon to 8 PM MST Wednesday. * TIMING...through 10 pm this evening and Wednesday from noon to 8 PM. * WIND...Southwest to west 20 to 30 mph gusts up to 50 mph through this evening and southwest 20 to 25 mph gusting up to 40 mph on Wednesday. * HUMIDITY...7 to 15 percent. * IMPACTS...Any fires that start will likely spread rapidly due to strong winds and very dry conditions. Outdoor burning is highly discouraged. 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. && $$ CAZ226>228-140500- /O.CON.KVEF.FW.W.0003.000000T0000Z-210414T0500Z/ Owens Valley/Southern Inyo Forest-Death Valley National Park- Mojave Desert Including Morongo Valley/Yucca Valley- 1234 PM PDT Tue Apr 13 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM PDT THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 226, 227, 228... * TIMING...Through 10 pm this evening. * WIND...For the Owens Valley and Southern Inyo Forest, west 40 to 50 mph winds with gusts over 60 mph possible. For San Bernardino County, west to southwest 25 to 35 mph winds with gusts up to 60 mph possible. * HUMIDITY...6 to 15 percent. * IMPACTS...Any fires that start will likely spread rapidly due to strong winds and very dry conditions. Outdoor burning is highly discouraged. The main threat for San Bernardino County is in the western and northern portions of the county. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ AZZ101-NVZ460>466-140500- /O.CON.KVEF.FW.W.0003.000000T0000Z-210414T0500Z/ Lake Mead NRA/Colorado River-AZ side- Esmeralda and Nye County Deserts/CNC Dispatch- 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- 1234 PM PDT Tue Apr 13 2021 /1234 PM MST Tue Apr 13 2021/ ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM PDT /10 PM MST/ THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 101, 460, 461, 462, 463, 464, 465, AND 466... * TIMING...Through 10 pm this evening. * WIND...Southwest to west 20 to 30 mph gusts up to 50 mph. * HUMIDITY...7 to 15 percent. * IMPACTS...Any fires that start will likely spread rapidly due to strong winds and very dry conditions. Outdoor burning is highly discouraged. 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. && $$ weather.gov/lasvegas
3 follow-up statements
709 WWUS85 KVEF 140442 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 942 PM PDT Tue Apr 13 2021 AZZ102-141900- /O.EXP.KVEF.FW.W.0003.000000T0000Z-210414T0500Z/ /O.CON.KVEF.FW.W.0004.210414T1900Z-210415T0300Z/ Northwest Deserts/Northwest Plateau- 942 PM MST Tue Apr 13 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 8 PM MST WEDNESDAY FOR STRONG WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE 102... ...RED FLAG WARNING WILL EXPIRE AT 10 PM MST THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE 102... * TIMING...Wednesday from noon to 8 PM. * WIND...Southwest 20 to 25 mph gusting up to 40 mph on Wednesday. * HUMIDITY...7 to 15 percent. * IMPACTS...Any fires that start will likely spread rapidly due to strong winds and very dry conditions. Outdoor burning is highly discouraged. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ CAZ226>228-140545- /O.EXP.KVEF.FW.W.0003.000000T0000Z-210414T0500Z/ Owens Valley/Southern Inyo Forest-Death Valley National Park- Mojave Desert Including Morongo Valley/Yucca Valley- 942 PM PDT Tue Apr 13 2021 ...RED FLAG WARNING WILL EXPIRE AT 10 PM PDT THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 226, 227, 228... Gusty southwest winds have decreased across much of the region this evening, with gusts generally less than 35 mph. A few isolated areas are still seeing gusts over 35 mph, but are expected to decrease over the next few hours. $$ AZZ101-NVZ460>466-140545- /O.EXP.KVEF.FW.W.0003.000000T0000Z-210414T0500Z/ Lake Mead NRA/Colorado River-AZ side- Esmeralda and Nye County Deserts/CNC Dispatch- Lincoln County/Ely Dispatch-Nye County Deserts/Las Vegas Dispatch- Sheep Range-Spring Mountains- Clark and SW Lincoln County Deserts/Las Vegas Dispatch- Lake Mead NRA/Colorado River-NV side- 942 PM PDT Tue Apr 13 2021 /942 PM MST Tue Apr 13 2021/ ...RED FLAG WARNING WILL EXPIRE AT 10 PM PDT /10 PM MST/ THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 101, 460, 461, 462, 463, 464, 465, AND 466... Gusty southwest winds have decreased across much of the region this evening, with gusts generally less than 35 mph. A few isolated areas are still seeing gusts over 35 mph, but are expected to decrease over the next few hours. $$ weather.gov/lasvegas
683 WWUS85 KVEF 141631 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 931 AM PDT Wed Apr 14 2021 AZZ102-150300- /O.CON.KVEF.FW.W.0004.210414T1900Z-210415T0300Z/ Northwest Deserts/Northwest Plateau- 931 AM MST Wed Apr 14 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MST THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE 102...... * TIMING...Wednesday from noon to 8 PM. * WIND...Southwest 20 to 25 mph gusting up to 40 mph. * HUMIDITY...7 to 15 percent. * IMPACTS...Any fires that start will likely spread rapidly due to strong winds and very dry conditions. Outdoor burning is highly discouraged. 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. && $$ weather.gov/lasvegas
925 WWUS85 KVEF 150241 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 741 PM PDT Wed Apr 14 2021 AZZ102-150345- /O.EXP.KVEF.FW.W.0004.000000T0000Z-210415T0300Z/ Northwest Deserts/Northwest Plateau- 741 PM MST Wed Apr 14 2021 ...RED FLAG WARNING WILL EXPIRE AT 8 PM MST THIS EVENING FOR STRONG WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE 102...... Gusty winds will continue to decrease this evening along with improving humidity values. $$ weather.gov/lasvegas
Nearby
Red 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.