Monsoon moisture seeped into the southern Mojave Desert, fueling scattered thunderstorms. Some storms produced high winds and 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.
Monsoon moisture seeped into the southern Mojave Desert, fueling scattered thunderstorms. Some storms produced high winds and 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 Aug 7, 2:30 PM MST, 1 hour 12 minutes earlier.
Area Forecast Discussion National Weather Service Las Vegas NV 230 PM PDT Wed Aug 7 2019 .SYNOPSIS...Chances for showers and thunderstorms continue on Thursday across parts of the area with temperatures slightly warmer than normal. Drier air moving in from the west will flush out monsoon moisture and bring an end to thunderstorm activity by the weekend and dry, seasonal conditions are expected to continue into early next week. && .DISCUSSION...tonight through next Wednesday. A 70-80 knot upper level jet streak associated with an area of low pressure off the southern California coast could provide support for nocturnal thunderstorms across portions of Inyo, Esmeralda and central Nye counties overnight. PWAT values over this region generally less than an inch and primarily in the mid levels bring an increasing threat of strong winds to these areas. Moisture profiles deepen as we move south through the CWA with 1-1.5 inch PWATs common. Both gusty winds and locally heavy rain will be a concern in this region into the evening hours but coverage is expected to decrease overnight. Thunderstorm coverage on Thursday will include a chance for storms over the northwestern portions of Inyo County, parts of the southern Great Basin, Mohave County, the Spring Mountains and Sheep Range in Clark County. Bumped up temperatures on Thursday over what the NBM initialized with MOS guidance suggesting a similar day to today temperature wise. Same story for Friday with the NBM appearing underdone with temperatures. Models are forecasting dry conditions area wide on Friday despite moisture not getting completely flushed out of Mohave County where weak instability is still forecast Friday afternoon. The weekend through the middle of next week looks dry and temperatures should be seasonal or slightly under with troughing transitioning to zonal flow over the west and high pressure centering over the southeast US. && .FIRE WEATHER...Shower and thunderstorm development remains possible overnight primarily over the northwestern portion of the forecast area. Shower/storm coverage elsewhere is expected to have better chances of producing wetting rains and coverage overall is expected to decrease overnight. Due to the ongoing threat of dry thunderstorms overnight in Esmeralda County and and portions of Nye County, a Red Flag Warning remains in effect until 5 am Thursday. Storms developing in these areas increases the potential for lightning caused fire starts and fire spread from associated gusty winds. && .AVIATION...For McCarran...Confidence is increasing for the potential for gusty thunderstorm outflow winds impacting the Las Vegas Valley this afternoon between 23-03Z. Can't rule out an isolated TSRA developing in the valley itself which would result in more variable outflow wind impacts, but the more likely scenario is southwest wind push arriving from the south and impacting the terminal with little precip expected. This may require amendments this evening and PIREP solicitation is recommended as approaches, especially from the southwest, will be impacted. This activity should clear out after 03Z leaving the region in south-southwest winds aoa 10kts. For the rest of southern Nevada, northwest Arizona and southeast California...The region will be contending with the development of isolated thunderstorms and gusty outflow winds, potentially over 30 kts at times. The terminals most likely to be impacted are initially KDAG, but soon after KEED/KIFP. KBIH will also see some TSRA development most likely this afternoon but confidence in terminal impacts is a bit less confident. CIGs should remain VFR but thunderstorm outflows in all cases may result in sporadic wind impacts throughout the afternoon and early evening hours. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && DISCUSSION/FIRE WEATHER...Salmen AVIATION...TB3 For more forecast information...see us on our webpage: http://weather.gov/lasvegas or follow us on Facebook and Twitter
The Las Vegas radar (KESX), 100 km away, was scanning. The volume nearest the first event began at 22:43 UTC.
2 thunderstorm wind, 1 flash flood, 1 flood. Local standard time, as filed.
Thunderstorm winds blew part of the roof off a home, snapped power poles, uprooted large trees, and blew a trampoline over a house.
Several roads were closed in Golden Valley, some with water depths over two feet, and two swift water rescues occurred.
The Sacramento Wash flooded Oatman Highway between mile markers 33 and 40 several hours after the heavy rain which caused flash flooding in Golden Valley.
Thunderstorm winds blew down power lines in Topock.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2019Every state in 2019This day in weather historyWarnings in Arizona, August 2019
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: 839987, 839990, 839994, 839995.