Monsoon moisture pushing west and north brought another round of thunderstorms to the Mojave Desert.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS VEF wrote it up.
Monsoon moisture pushing west and north brought another round of thunderstorms to the Mojave Desert.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Las Vegas, NV wrote its last area forecast discussion before the first event at Sep 2, 1:01 PM PST, 5 hours 30 minutes earlier.
Area Forecast Discussion National Weather Service Las Vegas NV 201 PM PDT Sat Sep 2 2017 .SYNOPSIS...Isolated shower and thunderstorm activity is expected to develop late this afternoon through this evening, especially over central Mohave County into the Colorado River Valley. Chances for storms will spread to the rest of the region Sunday as moisture overspreads the area. Storm chances will decrease in most areas Monday as high pressure begins to build. However, storms may continue each afternoon as low-grade monsoon moisture is recycled each day. && .SHORT TERM...Through Monday. The Gulf Surge that came up the Colorado River Valley earlier today has all but stopped between Lake Mohave and Lake Mead this afternoon. To the south, dew points in the 60's were present along the river, with upper 40s and 50s elsewhere south of I-15. This low-level moisture will provide a decent environment for storms to propagate west into the area from the Mogollon Rim. Though the latest HRRR runs have decreased in strength, there are still indications that a cold-pool driven complex could push into Mohave County to the Colorado River Valley late this afternoon and this evening. If this does occur, gusty (potentially severe) winds will be the primary concern. Additional showers (possibly virga) will then be possible overnight in an arch from Kingman to the Spring Mountains, to Owens Lake overnight as the leading edge of the moisture boundary (associated with remnants from TS Lidia) pushes north across the region. For Sunday, ample moisture will be in place for isolated to scattered storms. Storms will be most likely over the high terrain across the region, with little more than diurnal heating creating lift. Moisture will be to wane on Monday as high pressure begins to build over the region. However, storm chances will continue across the high terrain of the southern Great Basin and Mojave Desert with moisture trapped under the ridge. .LONG TERM...Tuesday through Friday. The medium range models indicate a possible transition to a fairly deep trough by next weekend, especially the ECMWF solution. Meanwhile, an amplified ridge is forecast to be over the western states Tuesday while a closed slow spins off the central California Coast. This will provide hot conditions with temperatures several degrees above normal. In addition, the east to southeast flow between the two circulations will persist through Wednesday over our forecast area and allow some moisture to be drawn up from Arizona leading to chances for afternoon and evening thunderstorms, particularly over the higher terrain. A deep trough extending from the Pacific Northwest to central California then comes into the picture Thursday and is forecast to progress inland late Thursday through Saturday. The ECMWF digs it down over southern California Saturday as a closed low while the GFS keeps it over northern Nevada and Utah as a more open wave. Confidence in the details is low for next weekend and we will need to watch for increasing shear Thursday and Friday combined with any lingering moisture which can lead to more organized thunderstorms. Temperatures will be on the decline and will be almost cool (at night) next weekend if the ECMWF comes close to verifying. && .AVIATION...For McCarran...Winds should remain less than 10 kts favoring an easterly to southeasterly direction through most of the afternoon. By 22-23Z today, winds should favor a south to southeasterly direction with winds increasing to around 10-12 kts. Occasional gusts are possible this evening up to around 15 kts. Isolated to scattered thunderstorms are possible in the Peach Springs and Daggett corridors later this afternoon into the overnight period. With highest chances in the Peach Springs corridor. There exists a slight to moderate chance of outflow winds reaching the terminal today between 02-05Z and would likely cause stronger gusts around 20-30kts from the south or southeast. SCT to BKN above 14kft through the forecast period. For the rest of southern Nevada, northwest Arizona and southeast California... Isolated to scattered thunderstorms are possible across northwest Arizona, far southern Nevada, and eastern San Bernardino County this afternoon and evening, with highest chances across the Colorado River Valley and central Mohave County. Gusty outflow winds will be the primary concern with any thunderstorm activity that develops this afternoon and evening. SCT to BKN above 14kft through the forecast period with cigs down to 10kft at times. The rest of the region will see generally light diurnal winds with FEW to SCT above 14kft. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && SHORT TERM...Wolcott LONG TERM....Adair AVIATION.....Kryston For more forecast information...see us on our webpage: http://weather.gov/lasvegas or follow us on Facebook and Twitter
The Las Vegas radar (KESX), 30 km away, was scanning. The volume nearest the first event began at 02:31 UTC.
1 thunderstorm wind. Local standard time, as filed.
Thunderstorms produced strong winds near Cottonwood Cove. A man was killed when he became entangled in the mooring line of a house boat and dragged under the water.
As the offices recorded each death: direct deaths were caused by the weather itself, indirect ones by something it set in motion.
| Event | Date | Age | Sex | Where | Kind |
|---|---|---|---|---|---|
| Thunderstorm Wind, Clark | 2017-09-02 | Male | In Water | Indirect |
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nevada in 2017Every state in 2017This day in weather historyWarnings in Nevada, September 2017
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 715742.