A brief push of monsoon moisture fueled isolated thunderstorms in southern San Bernardino County, a few of which produced flash flooding.
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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.
A brief push of monsoon moisture fueled isolated thunderstorms in southern San Bernardino County, a few 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 28, 12:22 PM PST, 38 minutes earlier.
Area Forecast Discussion National Weather Service Las Vegas NV 122 PM PDT Wed Sep 28 2022 .SYNOPSIS...Scattered showers and thunderstorms will be possible across northwest Arizona, southern Nevada, and southeastern California into this evening, with heavy rain, flash flooding, and gusty winds possible. Precipitation chances decrease through the rest week as drier air slowly moves into the region. Temperatures will slowly moderate closer to normal by this weekend. && .SHORT TERM...Through Friday night. Strongest storms that fired late morning and are still ongoing between Morongo Basin to Indian Springs developing along the western periphery of deeper moisture and just ahead of elongated upper level disturbance noted in water vapor. This line may yet bring storms back to the valley later this afternoon into the evening. This feature is forecast to slowly dissipate in the next 6-12 hours as it slowly shifts east which should allow convection to end later this evening. Models continue to delay moisture exiting the region tomorrow with latest guidance keeping a slight chance of showers and thunderstorms in southern Clark County and the Mojave National Preserve. Those storms chances will linger across Mohave County into Friday. Away from any storms no significant wind is expected while temperatures remain several degrees above normal. .LONG TERM...Saturday through Wednesday The passage of a trough to our north and high pressure reestablishing itself over the eastern Pacific will cut off the moisture source from the south and bring drier air back into the region over the weekend. Over the weekend into early next week, we can expect to see dry air across the entire region with temperatures remaining above normal. && .AVIATION...For Harry Reid...Easterly winds will persist through the afternoon, with the exception of influence from nearby convection. The most likely window for this convection will be between 22Z and 02Z. Variable gusty outflow winds are the most likely impact as precipitation impacts are unlikely at this time. Convection will begin to dissipate after sunset, with winds becoming more southerly through the evening hours. Winds will become light and variable shortly after midnight and will remain light and variable into the morning hours. For the rest of southern Nevada, northwest Arizona and southeast California...KHND and KVGT will follow similar trends to KLAS, with winds favoring an easterly component outside of convective influence later this afternoon. Southerly winds will continue through later this afternoon before shifting to the southwest around 23Z. KDAG will favor a more easterly direction into the evening before shifting to the west after sunset. The exception to this will be outflow winds from nearby convection later this afternoon between 23 and 02Z. KEED will be south-southeasterly through the afternoon before becoming southwesterly after sunset. KIFP will favor a southwesterly direction before becoming more southerly later this afternoon. There is a non-zero chance that the Colorado River Valley TAF sites may be impacted by thunderstorms starting around 22Z. However, confidence in this occurring is low so it is not reflected in the current TAF. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && SHORT TERM...Pierce LONG TERM...Salmen AVIATION...Stessman 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), 129 km away, was scanning. The volume nearest the first event began at 21:00 UTC.
2 flash flood. Local standard time, as filed.
Multiple roads were flooded, and one van was stuck in flowing water.
Hwy 62 was flooded and partly washed away.
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, September 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: 1058570, 1058572.