Weak low pressure moving up from the south brought a finger of monsoon moisture to the Mojave Desert, fueling scattered thunderstorms. One storm produced 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.
Weak low pressure moving up from the south brought a finger of monsoon moisture to the Mojave Desert, fueling scattered thunderstorms. One storm produced 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 17, 3:38 PM PST, 1 hour 52 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Las Vegas NV 438 PM PDT Thu Jul 17 2025 .KEY MESSAGES... * Increased monsoonal moisture brings scattered showers and storms to the area through Saturday, with flash flooding and gusty outflow winds the main hazards. * Below-normal temperatures today and Friday, with a gradual rebound to near seasonal values over the weekend and next week. * Breezy southwest winds and drier conditions return next week as a trough sits off the West Coast. && .DISCUSSION...through Wednesday. Latest satellite imagery shows an MCV drifting NW through southeastern portions of the CWA. This feature, along with the terrain, will be the lifting mechanism for scattered convection across Mohave, Clark, and Lincoln counties this afternoon. Flash flooding and gusty outflow winds are the primary hazards. Due to the increased moisture and forecast coverage of storms, opted to issue a short-fused Flash Flood Watch for the aforementioned counties until 11PM. Farther west, convection and the subsequent hazards will be more isolated in nature. Tomorrow, precipitation chances become more widespread across the region, but the greatest coverage is expected in northern Lincoln and central Nye counties. This area will have the greatest risk of flash flooding. By Saturday, drier air begins to move in from the west, bring precip chances down and largely confining them Mohave and Lincoln counties, though an isolated storm or two may develop on the Sierra and/or Spring Mountains. Due to increased moisture and cloud cover, temperatures will be 5-10 degrees below normal for most of the area, particularly the eastern half. As drier air moves in over the weekend and next week, expecting a rebound to more seasonal values. This drier air will also be accompanied by increased southwest winds as a trough sits off the West Coast. Chances for impactful winds appear modest (under 30%) at this point, but breezes could be strong enough to elevate fire weather conditions in areas that don't see much precipitation over the next few days. && .AVIATION...For Harry Reid...For the 00Z Forecast Package...Primary concern continues to be convective activity through ~06Z. Vicinity convection is likely (90%), but chances of rain at the terminal are closer to ~50%. Should a storm move overhead, brief downpours could result in MVFR or IFR conditions. Otherwise, gusty outflow winds will be the main hazard. Gusts most likely to be in the 25-40 knot range, but cannot rule out gusts ~50 knots if a storm moves over the terminal. Outside of convective influences, winds should largely be from the south- southeast at 8-12 knots and gusts up to 20 knots. Scattered to broken clouds around 12kft, potentially dropping to 8-10kft if a storm moves overhead. Another round of storms is expected to develop by around midday Friday, with associated impacts expected through late afternoon. Temperatures remain under 100F through the forecast period. For the rest of southern Nevada, northwest Arizona and southeast California...For the 00Z Forecast Package...Scattered convection to continue through the evening hours across northwestern AZ and southeastern NV. Isolated shower/virga activity possible across our California zones. Under the heaviest cores, brief downpours could result in MVFR or IFR conditions. Outflow wind gusts 20-40 knots, possibly higher should a storm move over an airport. Outside of convective influences, winds for most of the area will be from the south, though across the Western Mojave, westerly winds are favored, with variable winds in the Owens Valley. Scattered to broken clouds around 12kft, potentially dropping to 8-10kft if a storm moves overhead. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && DISCUSSION...Woods AVIATION...Phillipson For more forecast information...see us on our webpage: https://weather.gov/lasvegas or follow us on Facebook and Twitter
The Las Vegas radar (KESX), 57 km away, was scanning. The volume nearest the first event began at 01:28 UTC.
1 flash flood. Local standard time, as filed.
Rocks and debris a few inches deep washed over Morning Star Mine Road.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2025Every state in 2025This day in weather historyWarnings in California, July 2025
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: 1286146.