The season's first push of monsoon moisture brought scattered thunderstorms to the Mojave Desert. Some storms produced severe weather and flash flooding.
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.
The season's first push of monsoon moisture brought scattered thunderstorms to the Mojave Desert. Some storms produced severe weather and flash flooding.
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 Jul 6, 1:56 PM PST, 2 hours 46 minutes earlier.
Area Forecast Discussion National Weather Service Las Vegas NV 256 PM PDT Thu Jul 6 2017 .SYNOPSIS...High pressure over the region will produce excessive heat through Saturday. Monsoon moisture will begin to push into the area Sunday, bringing thunderstorm chances along with cooler temperatures but higher humidity. && .SHORT TERM...through Saturday Night. Cumulus clouds were more numerous over the mountains today than yesterday, reflecting the slight moisture increase due to south-southeast flow aloft steering remnant moisture from distant thunderstorm complexes into our area. Surface dewpoints were up about ten degrees areawide from 24 hours ago, and precipitable water sensors showed small increases areawide. Warm mid level temperatures associated with the persistent ridge nearby were capping the clouds, with more convective inhibition than convective energy over most of the region. Conditions tomorrow look quite similar, with very low thunderstorm chances expected again. The main wild card for Friday and Saturday is whether any thunderstorm complex over Arizona will eject an outflow boundary into our area, bringing perhaps enough additional moisture and lift to overcome the cap. Meanwhile, the heat remains a big concern. Thursday was the 22nd straight day with a high temperature of 105F or higher at KLAS, breaking the previous record of 21 straight days, which had occurred five times. Temps over 110F will continue through Saturday, with Heat Risk levels of 3 and 4 over a large area, and the Excessive Heat Warning looks good. .LONG TERM...Sunday through Thursday. Models have been continuing to show the high pressure centered over southwest Utah slowly shifting eastward during this period. This should lead to some cooler temperatures and a more favorable setup for southeast flow to push some moisture across much of the region Sunday through most of Monday. More likely areas to see thunderstorm chances are over mountainous areas and across most of Mohave County. Backed off on widespread POPs as both the GFS and ECMWF are indicating areas could be lacking in low level moisture. However, increased POPs a bit across Mohave County as the upper level setup appears to be favorable for thunderstorms to develop every afternoon through this period. Partly sunny to mostly cloudy skies will accompany increased rain chances, otherwise expect scattered high clouds. Rain chances decrease slightly Tue and Wed and considerably by Thu as a trough approaches from the northwest shifting the high pressure further northeast bringing in a drier southwest flow. The troughing influence will allow for some slight chances of thunderstorms across northern portions of Inyo, Esmeralda, central Nye and Lincoln counties Tue and Wed afternoons. By Thu models are in less agreement, but are indicating that the high pressure should shift slightly west across much of the Great Plains. Though, this westward shift will only allow the monsoon moisture to seep into eastern Mohave County Thu afternoon, keeping the rest of our CWA mostly dry and mostly sunny. With a southwest flow developing Tue, slight chances for showers and thunderstorms cannot be ruled out each afternoon along the Sierra. Temperatures will be near normals Mon through Wed, with a slow up tick by the end of the work week. && .AVIATION...For McCarran...Light diurnal winds are expected through the period. Slight upticks in wind speeds cannot be ruled out with afternoon southeast winds. However, general speeds should be less than 10 kts. Winds may become southwest by 23-02Z today but are expected to be light and may be variable at times. Typical evening west push is likely by 03-04Z this evening continuing through most of the night and early morning tomorrow generally less than 10 kts. Light diurnal winds expected again tomorrow. FEW to SCT clouds above 20 kft through the period. Temperatures will continue to exceed 110F tomorrow creating density altitudes approaching 6000 ft in the afternoon. For the rest of southern Nevada, northwest Arizona and southeast California...Light diurnal winds will continue to follow typical summertime trends today and tomorrow for most terminals. Periods of FEW to BKN above 15 kft are possible today through tomorrow. A few thunderstorms cannot be ruled out over the Sierra Nevada and Spring Mtn today and tomorrow afternoon. && .FIRE WEATHER...The big story through Saturday will be excessive heat across much of the area as high pressure expands over the region, suppressing thunderstorm development. The high shifts east beginning Sunday, opening the door for moisture and thunderstorm chances in most of the area Sunday and Monday. A somewhat drier southwest flow may push in Tuesday and Wednesday. && .CLIMATE...Temperatures will once again soar across the region, approaching record highs for the date. Records for Friday, July 7, 2017 Location Forecast High Record High (year) ----------------------------------------------------- Las Vegas, NV 114 114 (1989) Kingman, AZ 109 109 (1905) Barstow-Daggett, CA 113 116 (1989) Bishop, CA 101 106 (1989) Death Valley, CA 125 127 (1989) && .HYDROLOGY...Ongoing minor flooding may continue in the eastern Sierra as temperatures remain high. Afternoon thunderstorms over the mountains may aid snowmelt runoff to keep some drainages elevated over the next few days. Remember, never drive through flooded roadways or around barricades. Also, pastureland or farmland adjacent to creeks, streams or rivers could experience areas of standing water. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && Short Term/Climate/Fire Weather...Morgan Long Term/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), 122 km away, was scanning. The volume nearest the first event began at 00:43 UTC.
4 thunderstorm wind. Local standard time, as filed.
Three separate thunderstorm wind gusts, all from different directions, occurred at the Indian Springs (KINS) ASOS. The first was 66 mph at 1642 PST, the second was 60 mph at 1846 PST, and the third was 60 mph at 1916 PST.
This gust was measured at Nellis AFB. The fire station door was blown off its track.
This gust occurred at the Boulder City Airport.
This gust occurred at the Indian Springs ASOS.
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, July 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: 707226, 707227, 707228, 707230.