Moisture from the remnants of Pacific Tropical Storm Mario fueled scattered thunderstorms, many of which 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.
Moisture from the remnants of Pacific Tropical Storm Mario fueled scattered thunderstorms, many of which 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 Sep 18, 4:06 AM PST, 4 hours 18 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Las Vegas NV 506 AM PDT Thu Sep 18 2025 .KEY MESSAGES... * Increasing tropical moisture will move into the region today and Friday, bringing chances for showers and thunderstorms. Locally heavy rain and high rainfall rates will lead to an increased risk of flash flooding, especially over San Bernardino County. * Slight chances for showers and thunderstorms will linger through the weekend. Drier and warmer weather could return next week. && .DISCUSSION...through Wednesday. Early morning satellite loop showed mid and high level clouds associated with the remnants of Mario blanketing our CWA. Surface obs showed light winds, a very sharp dewpoint gradient near Interstate 40, and light rain nearing our southern CWA border. As has been the case for a few days now, the incoming rain is the primary forecast concern. High resolution models and WPC projections still show the greatest chances for heavy rain in San Bernardino County, so will leave the Flood Watch in place there. Lower, but nonzero, risks for flooding still exist in the rest of our CWA, primarily Inyo, Clark, and Mohave counties. The greatest risk of flooding should be today and tonight before the best forcing exits Friday morning. Leftover moisture and more sunshine should fuel thunderstorm chances Friday afternoon, then limited to mainly over the mountains Saturday and Sunday. Models disagree on whether another cutoff low early next week remains offshore or moves inland and taps into the tropical moisture lurking to our south. The first scenario, which looks more likely, would result in drier and warmer weather. The second, which cannot be ruled out, would result in a round of more widespread showers and thunderstorms. && .AVIATION...For Harry Reid...For the 12Z Forecast Package...Light and variable winds will continue through the morning as mid-level clouds stream into southern Nevada. Vicinity thunderstorms expected between 17 and 05Z, with a 30-40 percent chance of thunderstorms over the terminal causing heavy rain, frequent lightning, CIGs around 8 kft, and gusty winds from their direction between 30 and 40 kts. Without thunderstorm influence, expect gusty southwest winds around 20 kts this afternoon, variable winds overnight, and light easterly winds Friday morning. Thunderstorm chances return to the region Friday afternoon. For the rest of southern Nevada, northwestern Arizona and southeastern California...For the 12Z Forecast Package...Shower activity will continue through the morning at KDAG, KEED, and KIFP. Areawide terminals will experience vicinity thunderstorms between 17 and 05Z today, with a 30-40 percent chance of thunderstorms directly over terminals. With direct thunderstorm impact, expect heavy rain, frequent lightning, CIGs around 8 kft, and gusty winds from their direction between 30 and 40 kts. KBIH will experience a second round of vicinity thunderstorms overnight. Without thunderstorm influence, expect gusty southwest winds at Las Vegas Valley TAF sites, gusty south-southeast winds at KBIH, breezy northwest winds at Colorado River Valley TAF sites, and breezy easterly winds at KDAG. Thunderstorm chances return to the region Friday afternoon. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && DISCUSSION...Morgan AVIATION...Soulat 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), 172 km away, was scanning. The volume nearest the first event began at 16:22 UTC.
7 flash flood, 1 flood, 1 hail. Local standard time, as filed.
Amboy Road was flooded, and the pavement broke apart. Multiple cars were stuck.
Highway 62 was flooded.
Highway 247 was flooded near mile marker 72.
There was minor flooding of Highway 395 north of Kramer Junction.
Large amounts of half inch to three quarter inch hail fell on Utah Trail south of Highway 62.
Adobe Road was flooded between Amboy Road and Indian Trail.
The intersection of Sunfair Road and Cobalt Road was flooded.
There were two feet of standing water at the intersection of Highways 190 and 127, water and debris over Highway 190 at Furnace Creek, and the following roads were closed: Badwater Road from Jubilee Road to Highway 190, all of West Side Road, and all of Twenty Mule Team Road.
Flash flooding on Main Street between Lenwood Road and Sweeten Lane swept away a car, killing a two-year old boy and injuring his father.
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 |
|---|---|---|---|---|---|
| Flash Flood, San Bernardino | 2025-09-19 | 2 | Male | Vehicle/Towed Trailer | Direct |
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, September 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: 1295914, 1295915, 1295916, 1295917, 1295920, 1295918, 1295919, 1295921, 1295922.