A big push of monsoon moisture immediately followed the excessive heat event, and stormy conditions persisted into August. Many storms produced flash flooding, and some 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.
A big push of monsoon moisture immediately followed the excessive heat event, and stormy conditions persisted into August. Many storms produced flash flooding, and some 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 Jul 24, 2:53 PM MST, 3 hours 17 minutes earlier.
Area Forecast Discussion National Weather Service Las Vegas NV 253 PM PDT Sun Jul 24 2022 .SYNOPSIS...Moisture will continue to spread over the region early this coming week, leading to increasing chances of thunderstorms for all of Mohave County and much of Lincoln, Clark, and San Bernardino counties Monday and Tuesday before retreating a bit eastward beginning Wednesday. The main threats will be heavy rain and possibly flash flooding. && .SHORT TERM...through Monday night. Early afternoon satellite loop showed scattered clouds east of a line from Barstow to Mount Charleston to Independence, with clear skies to the west. A few thunderstorms were ongoing over Mohave and Lincoln counties, and some deeper cumulus were building over parts of San Bernardino and Clark counties. Surface obs showed a notable north and westward spread of low level moisture which was focused in Mohave County 24 hours ago, with surface dewpoints up 10-20 degrees over yesterday in much of Clark County and into western San Bernardino County. As noted by previous shifts, the main concern this afternoon through Monday night will be thunderstorms, with heavy rain and flash flooding as the primary threats. Precipitable water of 1.5 inches or higher has surged up the Colorado River to Mesquite and beyond, with a sharp gradient to less than one inch from Barstow through the Nevada National Security Site. Mixed-layer CAPE of over 1000 J/kg was in place for parts of Mohave and Clark counties, as well as a small area of southern Lincoln County. A very well defined mesoscale convective vortex was spinning northwest through Yavapai County Arizona. This should help lift the moist and unstable air this afternoon and evening, triggering more thunderstorms over Mohave County and perhaps farther northwest, depending on how long it maintains its identity. Tonight and Monday, in a large-scale sense, thunderstorm chances will spread farther north and west, with a lot of small-scale details yet to be resolved. How long the approaching MCV maintains its identity, exactly what track it takes, how much cloud cover it produces, how long this cloud cover lasts, and where any thunderstorm outflow boundaries generate and propagate will play roles in exactly where and when storms will develop Monday. Have some misgivings about the Flash Flood Watch due to all of these factors, but the deep moisture in place must be respected. Only one of the many possible lifting mechanisms will be needed to generate a flash flood threat. .LONG TERM...Tuesday through Sunday. Deep monsoonal moisture will continue to be in place over northwest Arizona and much of southern Nevada and at least eastern San Bernardino County through Tuesday. The EC ensemble mean indicates precipitable water values of 1.50-1.75" between southern Nevada and Lake Havasu on Tuesday while the GEFS is about 0.25" lower with its values. Surface dewpoints in the upper 50s to mid 60s are forecast Tuesday morning. This will provide plenty of fuel for thunderstorms as long as there is a lifting mechanism...which appears will mainly be surface heating as there is not a solid indication of a well defined dynamic focus for lift in the upper levels. Cloud cover and outflow boundaries originating from the previous day's convecting will also likely have some influence as is typical during monsoon season. The latest NBM PoP values of 20- 40 percent over the aforementioned areas look reasonable given this setup, but heavy rainfall potential will still be quite likely where storms do develop. PoP values decrease noticeably Wed-Fri, as the Four Corners high migrates over northern Nevada and Oregon. This would gradually decrease moisture as the clockwise flow around the high pulls down drier area from the north. However, we will have to watch a few things. First, this pattern with the high over northern Nevada, can drive any convection that develops over Lincoln County and southwest Utah down into southern Nevada during the late afternoon and evening hours. Second, the EC ensemble and deterministic solutions depict an easterly wave moving across southern Arizona and southeast California during this period and this could be a focus for convection which could propagate up into our forecast area. The GEFS does not depict an easterly wave as far north as the EC solutions. In any case, subtle features and daily convective influences from afar can lead to significant changes. So, even though PoPs are lower, we will need to take a day-by-day approach in deciding where the main threats are much of the coming week as there is no strong scouring effect for moisture. Temperature trends still look to be running a few degrees below normal early in the week with the moisture influx, then gradually climbing back to near normal the second half of the week. && .AVIATION...For Harry Reid...Breezy southeast to south winds will prevail into this evening before decreasing and turning more to the southwest around sunset. Isolated thunderstorm activity is possible near the terminal through 03Z, although most of the activity is now expected to stay either east of the area or over the higher elevations north of the city. While a few isolated showers will also be possible later tonight after 08Z, there will be a slightly better chance of thunderstorms tomorrow afternoon and a PROB30 has been added to the TAF after 18Z. Outside of the shower and thunderstorm activity, skies will generally be SCT-BKN AOA 15kft through the TAF period. For the rest of southern Nevada, northwestern Arizona, and southeastern California...The main forecast concern through the TAF period will be scattered shower and thunderstorm activity. While a few storms are possible in the vicinity of most terminals this afternoon and evening, a better chance exists Monday. The one exception is KBIH where no storms are forecast. Outside of thunderstorm activity, breezy southeast to southwest winds are expected along with SCT to BKN skies AOA 12kft through the TAF period. && .SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report any significant weather or impacts according to standard operating procedures. && SHORT TERM...Morgan LONG TERM...Adair AVIATION...Planz 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), 127 km away, was scanning. The volume nearest the first event began at 01:08 UTC.
22 flash flood, 1 dust storm. Local standard time, as filed.
Hackberry Rd was closed from Hwy 66 to I-40.
Antares Rd was closed from Hwy 66 to Pierce Ferry Rd.
Dust storm conditions reduced visibility to zero in Dolan Springs.
Hualapai Mountain Rd was flooded with water and debris.
Greggs Hideout Rd was closed from Pierce Ferry Rd to mile marker 10.
Huffriter Crossing was closed from Hwy 93 to Back Rd.
Pump Station Rd was closed from Hwy 93 to Back Rd.
Bogles Ranch Rd was closed from Upper Trout Creek to Bogles Ranch.
Signal Rd was closed from Hwy 93 to Alamo Rd.
Banegas Crossing was closed from Hwy 93 to Banegas Ranch.
Flash flooding in Golden Valley closed several roads and resulted in one swift water rescue of a stranded driver.
Several streets flooded in the Riviera and Rotary Park neighborhoods.
Seventeen Mile Rd was closed from Hwy 93 to Signal Rd.
Burro Creek Crossing was closed from Hwy 93 to mile post 14.
Sycamore Camp Rd was closed from Burro Creek Crossing to mile post 9.
Numerous roads in and south of Golden Valley were closed due to flooding.
Stockton Hill Rd was closed.
Oatman-Topock Hwy was closed just north of I-40.
Pierce Ferry Rd was closed due to flooding of the Archibald Wash.
Flooding of Short Creek closed several streets in Colorado City.
White Hills Rd was closed.
Flash flooding closed numerous roads in Golden Valley and also left water and debris on Hwy 93.
Cottonwood Rd was closed from Hwy 93 to mile marker 16.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arizona in 2022Every state in 2022This day in weather historyWarnings in Arizona, July 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: 1050025, 1050026, 1050027, 1050033, 1050034, 1050036, 1050037, 1050039, 1050040, 1050041, 1050043, 1050049, 1050200, 1050201, 1050202, 1050203, 1050204, 1050205, 1050206, 1050207, 1050208, 1050209, 1050210.