Alert archive / Arizona / Red Flag Warnings in 2018
Red Flag Warning 2, NWS Las Vegas, NV
NWS Las Vegas, NV issued this red flag warning at Apr 15, 2018, 3:44 AM MST for Mohave County, Arizona; Clark County, Nevada; San Bernardino County, California. It took effect at Apr 16, 2018, 9:00 AM MST. It was in force for 13 hr. 10 reports 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
- Apr 15, 2018, 3:44 AM MST (10:44 UTC)
- In effect from
- Apr 16, 2018, 9:00 AM MST
- Expired
- Apr 16, 2018, 10:00 PM MST
- In force
- 13 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 10:44 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 |
|---|---|---|---|
| Apr 16, 12:00 PM MST | NON-TSTM WND GST 79 | 3 Ne Mount Charleston, NV | |
| Apr 16, 1:34 PM MST | NON-TSTM WND GST 66 | 1 Ese Red Rock Canyon, NV | HIGH WINDS OCCURRED BETWEEN 134 PM AND 834 PM. |
| Apr 16, 1:35 PM MST | NON-TSTM WND GST 48 | Big Bear Airport, CA | AWOS STATION L35, BIG BEAR AIRPORT. |
| Apr 16, 1:55 PM MST | NON-TSTM WND GST 52 | Apple Valley Airport (K, CA | MESONET STATION KAPV, APPLE VALLEY AIRPORT (KAPV). |
| Apr 16, 2:15 PM MST | NON-TSTM WND GST 55 | Running Springs (2 Nw), CA | MESONET STATION HHPC1, RUNNING SPRINGS (2 NW). |
| Apr 16, 2:27 PM MST | NON-TSTM WND GST 65 | 2 Nw Indian Springs, NV | HIGH WINDS OCCURRED BETWEEN 227 PM AND 413 PM. |
| Apr 16, 4:00 PM MST | NON-TSTM WND DMG | Hesperia, CA | MULTIPLE POWER AND COMMUNICATION LINES DOWNED IN HESPERIA, APPLE VALLEY, AND VICTORVILLE. ALSO THREE LARGE TREES DAMAGED IN HESPERIA. POWER OUTAGES IN THE AREA AS WELL. |
| Apr 16, 4:55 PM MST | HIGH SUST WINDS 43 | 1 N Bullhead City, AZ | HIGH WINDS OCCURRED BETWEEN 455 PM AND 555 PM. |
| Apr 16, 5:00 PM MST | NON-TSTM WND DMG | 5 Se Downtown Las Vegas, NV | A TREE FELL ONTO POWER LINES ON THE EAST SIDE OF LAS VEGAS. THE TIME AND LOCATION WERE ESTIMATED. |
| Apr 16, 8:21 PM MST | NON-TSTM WND GST 55 | Lucerne Valley (1 Sw), CA | MESONET STATION F0119, LUCERNE VALLEY (1 SW). |
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 00:00Z, 10.7 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
- 4121 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 113 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
719 WWUS85 KVEF 151044 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 344 AM PDT Sun Apr 15 2018 .A potent storm system will bring another round of gusty winds along with low relative humidity Monday. AZZ101-102-CAZ229-NVZ466-161045- /O.UPG.KVEF.FW.A.0002.180416T1600Z-180417T0500Z/ /O.NEW.KVEF.FW.W.0002.180416T1600Z-180417T0500Z/ Lake Mead NRA/Colorado River-AZ side- Northwest Deserts/Northwest Plateau-Lower Colorado River Valley- Lake Mead NRA/Colorado River-NV side- 344 AM PDT Sun Apr 15 2018 /344 AM MST Sun Apr 15 2018/ ...RED FLAG WARNING IN EFFECT FROM 9 AM PDT /9 AM MST/ TO 10 PM PDT /10 PM MST/ MONDAY FOR STRONG WINDS AND LOW RELATIVE HUMIDITY... The National Weather Service in Las Vegas has issued a Red Flag Warning, which is in effect from 9 AM PDT /9 AM MST/ to 10 PM PDT /10 PM MST/ Monday. The Fire Weather Watch is no longer in effect. * TIMING...Monday morning through Monday evening. * WIND...South-Southwest winds 20 to 35 mph, gusts to 50 mph. * HUMIDITY...Minimum values 7 to 12 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. && $$ weather.gov/lasvegas
3 follow-up statements
041 WWUS85 KVEF 161035 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 335 AM PDT Mon Apr 16 2018 .A potent storm system will bring another round of strong winds along with low relative humidity today. AZZ101-102-CAZ229-NVZ466-162245- /O.CON.KVEF.FW.W.0002.180416T1600Z-180417T0500Z/ Lake Mead NRA/Colorado River-AZ side- Northwest Deserts/Northwest Plateau-Lower Colorado River Valley- Lake Mead NRA/Colorado River-NV side- 335 AM PDT Mon Apr 16 2018 /335 AM MST Mon Apr 16 2018/ ...RED FLAG WARNING REMAINS IN EFFECT FROM 9 AM PDT /9 AM MST/ THIS MORNING TO 10 PM PDT /10 PM MST/ THIS EVENING FOR STRONG WINDS AND LOW RELATIVE HUMIDITY... * TIMING...9 am this morning through 10 pm this evening. * WIND...South-Southwest winds 20 to 35 mph, gusts to 55 mph. * HUMIDITY...Minimum values 7 to 12 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ weather.gov/lasvegas
316 WWUS85 KVEF 162221 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 321 PM PDT Mon Apr 16 2018 .A potent storm system will bring another round of strong winds along with low relative humidity today. AZZ101-102-CAZ229-NVZ466-170500- /O.CON.KVEF.FW.W.0002.000000T0000Z-180417T0500Z/ Lake Mead NRA/Colorado River-AZ side- Northwest Deserts/Northwest Plateau-Lower Colorado River Valley- Lake Mead NRA/Colorado River-NV side- 321 PM PDT Mon Apr 16 2018 /321 PM MST Mon Apr 16 2018/ ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM PDT /10 PM MST/ THIS EVENING FOR STRONG WINDS AND LOW RELATIVE HUMIDITY... * TIMING...through 10 pm this evening. * WIND...South-Southwest winds 20 to 35 mph, gusts to 55 mph. * HUMIDITY...Minimum values 7 to 12 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. && $$ weather.gov/lasvegas
986 WWUS85 KVEF 170443 RFWVEF URGENT - FIRE WEATHER MESSAGE National Weather Service Las Vegas NV 943 PM PDT Mon Apr 16 2018 AZZ101-102-CAZ229-NVZ466-170545- /O.EXP.KVEF.FW.W.0002.000000T0000Z-180417T0500Z/ Lake Mead NRA/Colorado River-AZ side- Northwest Deserts/Northwest Plateau-Lower Colorado River Valley- Lake Mead NRA/Colorado River-NV side- 943 PM PDT Mon Apr 16 2018 /943 PM MST Mon Apr 16 2018/ ...RED FLAG WARNING WILL EXPIRE AT 10 PM PDT /10 PM MST/ THIS EVENING FOR STRONG WINDS AND LOW RH FOR FIRE WEATHER ZONES 101, 102, 229, AND 466... Winds have begun to decrease and RH recovery was underway across the region this evening. The Red Flag Warning will be allowed to expire on time. $$ Wolcott 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 15, 3:22 AM MST | Wind Advisory | VEF | Mohave | 48 hr |
| Apr 15, 2:12 PM MST | High Wind Warning | VEF | Mohave | 33 hr |
| Apr 15, 2:14 PM MST | Winter Weather Advisory | VEF | Inyo | 37 hr |
Nearby
Red Flag Warnings in Arizona, 2018Red Flag Warnings in Nevada, 2018Red Flag Warnings in California, 2018Every red flag warning in 2018
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.