The remnants of Eastern Pacific Tropical Storm Eugene fueled scattered thunderstorms over southeast California. A few produced flash flooding and strong winds.
Every event with a place to put it; 2 filed by county or forecast zone are drawn at its center, in a lighter ring. 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 remnants of Eastern Pacific Tropical Storm Eugene fueled scattered thunderstorms over southeast California. A few produced flash flooding and strong 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 Aug 11, 12:15 PM PST, 1 hour 35 minutes earlier.
Area Forecast Discussion National Weather Service Las Vegas NV 115 PM PDT Fri Aug 11 2023 .SYNOPSIS...Monsoonal moisture will gradually increase across the region this weekend through at least the middle of next week leading to chances for thunderstorms to develop each day...especially over the mountains. && .DISCUSSION...Through next Friday. A closed upper level low off the California coast will be the driving factor over the next few days. This low will continue to bring a southwest flow to the region today, but it is not expected to completely dry us out. PWs still remain around 1.00-1.25" with dew points in the lower to mid 50s across much of the CWA this afternoon. This moisture combined with weak instability will lead to a few afternoon showers and thunderstorms over mainly the higher terrain into this evening. The latest HRRR has also been fairly consistent over the past few runs indicating at least a slight chance of thunderstorms impacting the Las Vegas Valley. The greatest coverage this afternoon is expected to be across northern Inyo County, especially in the Sierra and White Mountains. This is also an area that needs to be watched for the likelihood of training cells. Because of this, WPC has issued a marginal risk for excessive rain due to the potential of training cells. On Saturday, PWs remain about the same as today, but we do increase overall instability. This could lead to a slightly higher coverage of storms across most of the CWA. With the PWs remaining between 1.00-1.25", there could be some local areas of flash flooding, but not expecting anything widespread. Beyond Saturday, the low off the coast will gradually slide back to the south and then get pushed a bit further off the coast as high pressure centered over the TX/NM region expands west. This will allow for more of a southeast flow into the region which will bring additional monsoonal moisture into the region. The latest models are not indicating any significant deeper moisture, but enough to help generate a few showers and thunderstorms each afternoon into next week. What happens with the off shore low is still in question next week, but looks to be somewhat of a player through the extended period. For now, do not see any significant drier air scouring out the monsoonal moisture so it may remain in place at least until the middle part of next week. Beyond the extended period, the latest deterministic models are indicating a tropical system developing off the southern tip of Baja. Something definitely to keep an eye on. Temperatures will remain slightly below normal into the weekend, but jump to a few degrees above normal early next week as high pressure expands west, but the potential for precipitation and outflow from storms to provide a cooling effect will be a possibility each day. && .AVIATION...For Harry Reid...Breezy south or southeasterly winds with gusts of 10-15 knots are expected through the early evening with winds shifting southwest and decreasing overnight. Scattered cumulus with bases near 10k are expected with a slight chance of thunderstorms through 2z this evening, with gusty winds possible if thunderstorm activity forms. For the rest of southern Nevada, northwest Arizona and southeast California...Numerous thunderstorms are expected near the Sierra and Owens Valley impacting KBIH with pockets of rainfall and gusty surface winds. Elsewhere, a few isolated thunderstorms are possible across southern Nevada and around the Las Vegas Valley with locally gusty surface winds possible. Otherwise, diurnal wind patterns with just a few clouds at the remaining TAF sites across the Mojave Desert and Colorado River Valley. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && DISCUSSION...Gorelow AVIATION...Meltzer For more forecast information...see us on our webpage: https://weather.gov/lasvegas or follow us on Facebook and Twitter
The San Joaquin Valley radar (KHNX), 178 km away, was scanning. The volume nearest the first event began at 21:50 UTC.
2 flash flood, 1 thunderstorm wind, 1 strong wind, 1 dust storm. Local standard time, as filed.
Mud, rock, and debris covered Highway 168.
A landspout was photographed in the Mojave River bed near 34.892 -116.988. No damage or injuries occurred.
Highway 62 was flooded between Sunfair Rd and Rotary Way.
Dust storm conditions caused near zero visibility 6 miles E of Newberry Springs, contributing to a multi-vehicle accident which closed I-40.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2023Every state in 2023This day in weather historyWarnings in California, August 2023
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: 1135975, 1135981, 1135982, 1135983, 1135985.