Persistent moist monsoonal flow fueled thunderstorms over southeast California. Several storms produced flash flooding, and a few produced severe weather.
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.
Persistent moist monsoonal flow fueled thunderstorms over southeast California. Several storms produced flash flooding, and a few produced severe weather.
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 16, 11:27 AM PST, 2 hours 46 minutes earlier.
Area Forecast Discussion National Weather Service Las Vegas NV 1227 PM PDT Tue Aug 16 2022 .SYNOPSIS...Scattered showers and thunderstorms will persist through the week as monsoonal moisture remains over the region, and any storms will be capable of producing locally heavy rain and flooding. With the abundant moisture in place, temperatures will remain near to slightly below normal into the weekend. && .SHORT TERM...through Wednesday night. Late morning satellite loop showed shallow cumulus bubbling over much of the CWA, with deeper convection beginning over the Hualapai Mountains and in southern Esmeralda County. Surface obs showed temperatures running a few degrees warmer than 24 hours ago, although still well below mid August averages, and dewpoints a few degrees lower than yesterday. With the deep moisture and some instability in place, no spot can be completely ruled out for thunderstorm chances this afternoon and evening, although the high resolution models are in decent agreement that the lowest chances will be in the Death Valley region and the lower elevations of Clark County. Models show a bit less instability Wednesday, resulting in a bit less thunderstorm coverage as well. However, this could be modified if any storm-scale circulation generated today drifts nearby Wednesday. Nocturnal storm chances look small tonight, but some of the high res models show storms persisting Wednesday night in the southern Great Basin. Temperatures will remain below normal thanks to the deep moisture and cloud cover. .LONG TERM...Thursday through the weekend. Continued southerly flow is expected across the region through the weekend. While thunderstorms are possible Thursday afternoon, models continue to highlight the Friday through Sunday period as period of potentially higher impact monsoonal weather. PWAT increase across the region to over 2 standard deviations over normal by Friday afternoon as tropical moisture gets absorbed into mean flow. While its hard to pin point mesoscale features this far in advance, long range models hint at a wave moving around the main flow Saturday into Sunday, which could enhance precipitation chances/coverage. This potential uptick in activity and increased risk of heavy rain leading to flash flooding is highlighted in a few ensembles. ECMWF EFIs shows potential for anomalous QPF through portions of Arizona into eastern portions of southern Nevada FRI-SUN. Model ensembles also show increased probabilities for 100 yr ARIs at times late Friday through Sunday. Finally, some of the clusters show QPF over the ensemble means through the weekend. While details are uncertain at this time, there is an increasing signal for an increased thunderstorm activity, heavy rain, and flash flooding this weekend. What is more certain is the continuation of below-normal temperatures with the persistent moisture and rain chances. && .AVIATION...For Harry Reid...Monsoon moisture will remain in place again today with FEW-SCT12-14k feet and SCT-BKN15-17k feet. Expect to see thunderstorms develop over the higher terrain this afternoon, but it's unlikely that storms will move into the valley and the main threat will be from outflow winds. Outside of any thunderstorm influences, winds will generally be east around 6-8 kts. Conditions are expected to remain the same Wednesday with scattered afternoon thunderstorms, majority remaining over the higher terrain. For the rest of southern Nevada, northwest Arizona and southeast California...Expecting scattered thunderstorms to develop across much of the region this afternoon. Best chances for thunderstorms impacts will be near KBIH where thunderstorms should be most widespread. Convection looks to remain generally over the higher terrain and chances are low that impacts will be felt at the area TAF sites, expect BIH. However, any outflow winds from local thunderstorms could impact the TAF sites into this evening. Outside of convection, winds will in general favor diurnal wind trends, except at KBIH where gust southeast winds are expected this afternoon. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && SHORT TERM...Morgan LONG TERM...Nickerson AVIATION...Gorelow For more forecast information...see us on our webpage: https://weather.gov/lasvegas or follow us on Facebook and Twitter
The Santa Ana Mts radar (KSOX), 118 km away, was scanning. The volume nearest the first event began at 22:14 UTC.
4 flash flood, 2 thunderstorm wind. Local standard time, as filed.
Highway 62 was flooded, and Lucerne Vista Ave was flooded between Yucca Trail and Pueblo Trail.
Swiftly flowing water up to the windows of a car swept it off of Highway 95.
Highway 95 was flooded just south of the CA/NV state line.
Thunderstorm winds blew down power lines.
Flooding blocked Highway 62 and Parker Dam Road, and there were rockslides along Parker Dam Road.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in California in 2022Every state in 2022This day in weather historyWarnings in California, August 2022
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: 1054899, 1054902, 1054904, 1054910, 1054912, 1054913.