Weak low pressure moving up from the south brought a finger of monsoon moisture to the Mojave Desert, fueling scattered thunderstorms. One storm produced heavy rain which led to water rescues in concrete flood channels, and one produced high winds.
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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 heavy rain which led to water rescues in concrete flood channels, and one produced high winds.
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 18, 12:24 PM PST, 1 hour 36 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Las Vegas NV 124 PM PDT Fri Jul 18 2025 .KEY MESSAGES... * Monsoonal moisture brings scattered storms to the area today, becoming more isolated on Saturday. Some of this activity may bring flash flooding and gusty outflow winds. * Temperatures rebound to near seasonal values over the weekend and next week as dry and breezy conditions return to most of the area. && .DISCUSSION...through Thursday. Latest satellite imagery shows a large MCV spinning along the border of Inyo and San Bernardino counties. This feature and the ever- present orographic circulations will help initiate scattered convection around the area today. Storms are already going on the high terrain of Clark and San Bernardino counties. As the afternoon rolls around, expecting coverage to increase along and south of the Interstate 15 corridor, as well as Lincoln County. Flash flooding will be the main hazard, though gusty outflow winds will also be possible. Unlike yesterday, today's activity should largely wane by sunset. Tomorrow, drier air begins to work its way in, resulting in more isolated activity, focused mainly across the southern Great Basin. By Sunday, precipitation chances drop below 20% across the entire CWA except eastern Mohave County where they linger between 20 and 40% through Tuesday. With moisture and cloud cover decreasing over the weekend, temperatures are forecast to rebound to near seasonal values. HeatRisk remains in the minor to moderate categories, suggesting impacts will largely be confined to those sensitive to heat. As a trough digs off the West Coast, we'll experience breezy southwest winds. Breezes may be strong enough to produce elevated fire weather conditions in places that don't receive much precipitation today. && .AVIATION...For Harry Reid...For the 18Z Forecast Package...Outside of any convective influences, expecting winds to remain light from the south, favoring a southeast component during the morning hours. However, vicinity thunderstorms are forecast to develop again this afternoon, with gusty, erratic outflow winds possible in the valley. Gusts of 20-40 knots possible (50%) with this activity. Chance of TS at the airport around 25%. Scattered to broken clouds between 10- 12kft with skies clearing late tonight. Temperatures expected to remain below 100F today. For the rest of southern Nevada, northwest Arizona and southeast California...For the 18Z Forecast Package...Isolated to scattered convection across the region this afternoon, primarily along the I- 15 corridor and southern Great Basin. Gusty, erratic outflow winds of 20-40 knots possible near thunderstorms. Convective activity will largely wane by sunset, but some may linger across the southern Great Basin until ~06z. Barring any convective influences, winds should follow typical, daily patterns. Scattered to broken clouds between 10-12kft with skies clearing late tonight. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && DISCUSSION...Woods AVIATION...Woods For more forecast information...see us on our webpage: https://weather.gov/lasvegas or follow us on Facebook and Twitter
Preliminary Local Storm Report
National Weather Service Las Vegas NV
1128 AM PDT Fri Jul 18 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0530 PM Flood Primm 35.61N 115.39W
07/17/2025 Clark NV Broadcast Media
Heavy rain from thunderstorms caused
flooding in and around Primm with the on and
off ramps closed due to ponding. Runoff also
caused the full closure of Interstate 15
from approximately 5pm until 6pm. A total of
1.50 inches of rain fell within 30 minutes.
0630 PM Flash Flood 6 NW Ivanpah 35.39N 115.39W
07/17/2025 San Bernardino CA Park/Forest Srvc
Runoff from thunderstorms caused rocks and
debris a few inches deep to wash over
Morning Star Mine Road. Time was based on
radar estimates.
&&The Las Vegas radar (KESX), 63 km away, was scanning. The volume nearest the first event began at 22:02 UTC.
1 heavy rain, 1 thunderstorm wind. Local standard time, as filed.
Two people were pulled from flowing washes after heavy rain fell upstream. One person suffered minor injuries.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nevada in 2025Every state in 2025This day in weather historyWarnings in Nevada, 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: 1286150, 1286151.