Multiple locations experienced heavy rain, flooding, and debris flows due to slow-moving training storms.
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 LKN wrote it up.
Multiple locations experienced heavy rain, flooding, and debris flows due to slow-moving training storms.
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 Elko, NV wrote its last area forecast discussion before the first event at Aug 1, 1:25 AM PST, 8 hours 55 minutes earlier.
Area Forecast Discussion National Weather Service Elko NV 225 AM PDT Sun Aug 1 2021 .SYNOPSIS...Showers and thunderstorms are expected again today and some showers could be locally moderate to heavy at times. A cooling trend continues, with high temperatures in the 70's and 80's. After some showers and thunderstorms in eastern Nevada on Monday, conditions generally dry out with a warming trend. && .SHORT TERM...Today through Monday afternoon There will be one more day today for widespread shower and thunderstorm activity before the ridge shifts eastward a bit, closing off the monsoonal flow of moisture. Storms will be slow moving once again, with pockets of moderate to heavy showers. Therefore, the threat for flash flooding continues and the Flash Flood Watch remains in effect through this evening for all but Humboldt County. Central Nevada looks to see a bigger portion of the stronger storms today and then in the late afternoon and evening the stronger storms expand into eastern Nevada, including the eastern part of Elko County from about the Rubies east (though scattered storms will still move into western portions of Elko County). Activity will taper off overnight tonight. Scattered showers and thunderstorms continue on Monday in the eastern half of Elko and White Pine Counties, but it will dry out elsewhere, with just some afternoon cumulus clouds. A weak upper Low off of the northern California coast will funnel in a little Pacific moisture into mainly Oregon and may clip very northwestern Humboldt County on Monday afternoon, though this would probably just bring a shower. Cooler temperatures continue today with highs in the mid 70's to mid 80's and then warming into the mid 80's to the lower 90's on Monday, though it will be cooler in eastern Nevada with the lingering clouds and showers. Lows tonight will be mainly in the 50's. Winds remain light outside of thunderstorms. .LONG TERM...Monday night through next Saturday Guidance has slowed down the progression of a lifting trough at the start of the week, resulting in some lowered confidence related to the timing of the synoptic pattern through the long term. Currently, high pressure looks to remain over Nevada on Tuesday. Unlike this past weekend, moisture shouldn’t be in abundance and we likely see quiet weather through Wednesday morning. Wednesday sees the offshore trough lift quickly to our north, but a shortwave trying to wrap around this trough helps bring in just enough moisture and instability to possibly trigger some convection. If there is convection, thunderstorms would be isolated in coverage. Due to the lower confidence in timing now, this will have to be monitored closely to see how models trend. Once the shortwave clears out of the region, weather is likely to be quiet at the end of the week. Gustier afternoon winds are possible during the second half of the week, but it still looks like nothing that would result in products being issued. Tuesday and Wednesday look to be the warmer days of the long term with afternoon highs in the 80s and 90s, though we can’t rule out a couple of low 100s for Humboldt county. With the aforementioned shortwave clipping our region, afternoon highs for the second half of the week still reach the 80s and 90s, but 100s are much less likely. && .AVIATION...Showers and thunderstorms are once again expected this afternoon with a majority of the activity beginning closer to our eastern sites of KELY and KEKO before becoming more widespread and numerous as we get into the evening. Smoke and haze still lingers across northern sites, but any impacts are expected to be minimal. && .FIRE WEATHER... Showers and thunderstorms will produce wetting rains again this afternoon and evening across much of the region, the exception is fire zone 437 where less moisture resides. Lightning may still occur outside of rain shafts that could spark fires, but the high humidity values will limit fire spread. Drier air spreads west to east Monday, limiting convection potential to eastern Nevada. Wetting rain potential will be significantly reduced. Beyond Monday, dry weather generally prevails except for isolated afternoon storms near the eastern Nevada border. && .LKN WATCHES/WARNINGS/ADVISORIES... Flash Flood Watch through this evening for Northeastern Nye County-Northern Elko County-Northern Lander County and Northern Eureka County-Northwestern Nye County-Ruby Mountains and East Humboldt Range-South Central Elko County-Southeastern Elko County-Southern Lander County and Southern Eureka County- Southwest Elko County-White Pine County. && 90/84/87/90
Special Weather Statement National Weather Service Elko NV 1021 AM PDT Sun Aug 1 2021 NVZ030-031-033>041-020300- Humboldt County-Northern Elko County-Southeastern Elko County- Ruby Mountains and East Humboldt Range-White Pine County- Northern Lander County and Northern Eureka County- Southern Lander County and Southern Eureka County- Southwest Elko County-South Central Elko County- Northwestern Nye County-Northeastern Nye County- Including the cities of Golconda, Winnemucca, Valmy, Dufferena, Midas, Gibbs Ranch, Charleston, Jarbidge, Mountain City, Owyhee, Tuscarora, West Wendover, Ely, Ely Airport, Lund, Preston, Ruth, Cherry Creek, McGill, Argenta, Battle Mountain, Crescent Valley, Beowawe, Dunphy, Emigrant Pass, Palisade, Eureka, Pinto Summit, Grass Valley, Hickison Summit, Diamond Valley, Eureka Airport, Garden Pass, Elko, Ryndon, Jiggs, Lamoille, Lee, South Fork, Spring Creek, Ruby Lake, Oasis, Manhattan, Round Mountain, Tonopah, Blue Eagle Ranch, and Duckwater 1021 AM PDT Sun Aug 1 2021 ...Isolated strong to severe thunderstorms and moderate to heavy rain possible again today... A very moist airmass continues to reside over northern and central Nevada for today. This airmass will fuel afternoon showers and thunderstorms again across the area. Some of these storms may be strong to severe in nature and could produce one inch or greater hail and gusty winds up to 60 mph. These isolated strong to severe storms are possible across portions of southern Lander/Eureka, northern Nye, White Pine, and eastern Elko counties. In addition, any storm will be able to produce moderate to locally heavy rain, leading to localized flash flooding. The threat for heavy rain exists for all of northern and central Nevada. If recreating outdoors, especially in remote areas, ensure to inform loved ones of your destination and expected time of return. Also, if driving across the backcountry, be aware that poor drainage areas may have standing water. If you come across water on a roadway, TURN AROUND, DON'T DROWN! Visit www.weather.gov/elko for the latest weather information.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ELKO NV
1022 AM PDT SUN AUG 1 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0500 PM FLASH FLOOD LAMOILLE 40.74N 115.49W
07/30/2021 ELKO NV OTHER FEDERAL
UPDATES PREVIOUS FLASH FLOOD REPORT FROM
LAMOILLE. PROLONGED AND HEAVY RAINFALL FROM
SHOWERS PARKED OVER THE RUBY MTNS PRODUCED A
RADAR ESTIMATED RAINFALL ACCUMULATION OF 2
TO 3 INCHES. THIS CAUSED FLASH FLOODING AND
AN AREA OF DEBRIS FLOW INCLUDING MUD, SAND,
AND ROCK OVER THE ROADWAY. IT WAS ESTIMATED
SOME SPOTS OF DEBRIS TO BE 2 TO 4 FEET DEEP
ON THE ROADWAY PER PHOTOS AND FIRST HAND
REPORTS.
&&
COThe Cedar City radar (KICX), 196 km away, was scanning. The volume nearest the first event began at 18:20 UTC.
2 flash flood, 1 heavy rain. Local standard time, as filed.
One and fifty-one hundreth inches of rain fell at DRI site (DNEP7), 2 miles west of Baker. Water was reported to be running onto an adjacent road in NV-488. Elevation 6035 feet.
Heavy rain was reported in the are with some estimates of 1-2 inches of rainfall. Law Enforcement reported several inches of water over US Highway 50 at mile marker 9. They also reported several inches of water across SR-488, 487, and US-6.
At least 15 different debris flows were caused by previous thunderstorms/heavy rain during the afternoon. Multiple reports came from the US Forest Service, Elko County Road Department, and Nevada Department of Transportation. USFS 660 will be closed until further notice. The height of debris flows is estimated to be between 4 and 8 feet within a 4-mile length of road.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nevada in 2021Every state in 2021This day in weather historyWarnings in Nevada, August 2021
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: 968761, 968760, 968765.