Warming temperatures into the 60s and 70s caused rock slides to occur.
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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 LKN wrote it up.
Warming temperatures into the 60s and 70s caused rock slides to occur.
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 Apr 28, 1:46 PM PST, 1 hour 27 minutes earlier.
Area Forecast Discussion National Weather Service Elko NV 246 PM PDT Fri Apr 28 2023 .SYNOPSIS...A building ridge will continue to warm up the silver state through the weekend. This will see Nevada have higher than seasonable temperatures with even the lows going above freezing for all elevations. High snowmelt and resulting increased stream flow can be expected for the weekend. The departure of the ridge and arrival of a trough will allow for isolated showers and thunderstorms along with breezy winds next week. && .SHORT TERM...Today and Saturday. Today will see the ridge axis moving into the silver state leading to calmer wind conditions. The passage of the ridge will continue the string of dry and fair weather days for the silver state. The ridge is causing well above normal temperatures across the silver state that will continue to increase into the weekend. Highs will be mainly in the 70s and 80s for most locations today and increase to 80s for Saturday. The warmest areas may even hit 90 with this warm wave. The overnight lows likewise will be warming with most locations staying above freezing during the overnight hours by the beginning of the weekend. Main concerns through the short term period continues to be the increased rate of snowmelt and resultant rises to creeks, streams and rivers. See hydro section for more details. .LONG TERM...Sunday through next Thursday The first half of Sunday sees fair and dry weather as the amplified ridge continues to push through the forecast area. There is some suggestion that the low, and the trough transporting it, continues to dig down the California coast and could usher in a couple of light rain showers. Where this occurs depends on the orientation of the trough with respect to our forecast area. We have some spotty, light showers in the grids for Lander and Eureka county, but this is not set in stone. The trough continues to dig on Monday, with the tight pressure gradient move in to the forecast area. This leads to anomalously strong winds, but who sees this winds depends on how deep the trough digs. As it stands, virtually our whole CWA, excluding Humboldt County, is on track to see sustained winds around 20 to 35 mph and gusts approaching 35 to almost 50 mph. The higher end of that range comes from the mountain ridges. If this winds do come to fruition, the southerly direction of these winds would lead to crosswinds on roads that run east-to-west, such as portions of I 80 and US 50. A much better chance for showers in Humboldt county, but significant rainfall amounts that would exacerbate flooding concerns isn't expected. The trough continues to dig deeply down the coast on Tuesday and Wednesday, leading to lighter winds and moving the rain-producing moisture away from us. However, cloudy conditions would trend temperatures downward as cooler air moves in. Afternoon highs range from the 60s to the 70s and overnight lows in the 30s and 40s. Thursday is still up in the air due to how far out in time it is, but at this time it looks like the trough could negatively tilt in our region, leading to breezy winds, and some light showers. This should be taken with a grain of salt as it is at the end of the forecast period. && .AVIATION...VFR conditions expected through the 24 hour period. CLear skies and light winds at all terminals. KTPH is current AMD NOT SKED due to maintenance this afternoon. && .Hydrology...Rivers, creeks, and streams continue to experience high flows as mountain snow from record breaking snowpack melts. Warming temperatures that will see even low temperatures remain above freezing at all elevations will cause accelerated snowmelt. This presents elevated flooding concerns across much of northern and central Nevada, with a flood watch in effect. Already occurring flooding will become worse as additional snowmelt water adds to the flood waters. Flood Warnings continue along the Humboldt at Battle Mountain and Comus. A Flood Watch remains in effect for Martin Creek at Paradise Valley. Flood Advisories continue for the Owyhee River near Mountain City, the Bruneau River at Rowland and Maggie Creek Near Carlin, and a new one for Mary's River near Charleston and Deeth has been issued. Additionally, a Flood Advisory remains in effect in the Taylor Canyon area along SR-11 southeast of Tuscarora. Fresh runoff water from the snowpack can be very cold and may lead to hypothermia conditions to anyone who is unprepared. Muddy conditions will exist near and around where water is present and can easily trap a vehicle so use caution. Do not drive through flood waters as the road can be compromised and unsafe to travel upon. Most flood drownings occur in vehicles so turn around and don't drown. && .LKN Watches/Warnings/Advisories... Flood Watch through late Tuesday night Northern Elko County... Northern Lander County and Northern Eureka County...Northwestern Nye County...Ruby Mountains and East Humboldt Range...South Central Elko County...Southern Lander County and Southern Eureka County...Southwest Elko County...White Pine County. && 99/84/84
The national radar mosaic for the moment the first event began.
1 debris flow. Local standard time, as filed.
Moisture locked up in mountain snow began to melt in Lamoille Canyon from temperatures in the 60s and 70s. This caused large rocks and boulders to fall onto and close USFS-660 from the Powerhouse Group Picnic Area to Thomas Canyon Campground.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nevada in 2023Every state in 2023This day in weather historyWarnings in Nevada, April 2023
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: 1084494.