The remnants of Tropical Storm Hilary caused gusty winds, record rainfall, and flooding across sections of central and northern Nevada.
Every event with a place to put it; 6 filed by county or forecast zone are drawn at its center, in a lighter ring. 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.
The remnants of Tropical Storm Hilary caused gusty winds, record rainfall, and flooding across sections of central and northern Nevada.
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 20, 2:11 AM PST, 2 hours earlier.
Area Forecast Discussion National Weather Service Elko NV 311 AM PDT Sun Aug 20 2023 .SYNOPSIS...Extensive tropical moisture from Tropical Cyclone Hilary has begun impacting the CWA. Expect the moisture to advance northward eventually bring showers and thunderstorms to the entire region. Central Nevada is forecast to receive the brunt of the precipitation (3-6+ inches QPF totals through Wednesday PM with isolated amounts of 8-10 inches) and dangerous to catastrophic flooding impacts cannot be ruled out. Northern Nevada will see QPF totals from 1-3+ inches through Wednesday PM with local maxima to 5 inches possible resulting in localized, and some significant, flash flooding. Southerly surface winds begin to build this morning reaching peak velocities on Monday. Preparations and necessary precautions for this storm should have already been made. Continue to monitor weather updates for current conditions and alerts. && .SHORT TERM...Today through Monday night. At 200 AM PDT (0900 UTC), the center of Hurricane Hilary was located near latitude 27.4 North, longitude 115.0 West. The hurricane is moving toward the north-northwest near 21 mph (33 km/h). Hilary is expected to accelerate as it moves north-northwestward to northward during the next day or two. On the forecast track, the center of Hilary will move close to the west-central coast of the Baja California Peninsula during the next few hours, and then move across southern California this afternoon. Current IR satellite imagery shows the entire CWA covered in upper level moisture. Radar reflectivities of 20-30 dBZ show returns for most of the CWA except portions of western Humboldt County indicating precip is already occurring for most of the region. Expect intensities to increase throughout the day. For the forecast area, this is an anomalous wet tropical system. Confidence is very high that this system will produce rainfall amounts that may exceed all time daily records. The heaviest rainfall is expected to occur over central Nevada throughout Monday, but the northern sections of the state will not be immune to seeing above average rainfall. As a result, all of northern and central Nevada remains under a flood watch through Tuesday. For the forecast area, this is an anonymously wet tropical system. Confidence is very high that this system will produce rainfall amounts that may exceed all time daily records. The heaviest rainfall is expected to occur over central Nevada throughout Monday, but the northern sections of the state will not be immune to seeing above average rainfall. As a result, all of northern and central Nevada remains under a flood watch through Tuesday morning. Winds could be particularly strong and gusty in and near areas of elevated terrain. Higher gusts are expected Monday and will persist even after the system becomes post-tropical. A high wind warning goes into affect for all counties except Humboldt and northwestern Nye at 6 am this morning and will extend to Humboldt and northwestern Nye at 10pm on Sunday ending at 8pm on Monday. Temperatures through the short term period will be well below normal thanks to the abundance of clouds and moisture. LONG TERM...Tuesday through Saturday... Overall, the long term period looks to remain active, but nowhere near as active as the beginning of the week. Temperatures slowly trend warmer over the course of the period. Tuesday sees troughing over the PNW help to pull the remnants of Hilary through the forecast area, allowing for showers and thunderstorms to continue. However, QPF totals are much closer to normal as daily totals for Tuesday currently range from a trace to about 0.10". There is currently a 5% to 10% chance of isolated pockets of higher totals of 0.20" to almost 0.40" from isolated pockets of heavier showers, but guidance is currently keeping totals that high in the eastern portion of White Pine County. Afternoon highs remain in the 70s. South to southwesterly flow on Wednesday and Thursday keeps just enough moisture aloft to support some clouds mixing in with our sunny skies, but any showers stay closer to the southeastern corner of the CWA --- namely northeastern Nye and southern White Pine counties. Afternoon highs continue to trend just a bit warmer into the upper 70s and 80s. A shortwave clipping the forecast area brings light showers and thunderstorms for the end of the week, and into the weekend. Right now, highest probs for precipitation of 40% to 60% are in central and northeastern Nevada, but ensembles show most likely highest QPF totals to be around 0.10". By the time the weekend comes, afternoon highs are still in the upper 70s to 80s, but more locations are seeing temperatures in the upper 80s. && .AVIATION...Weather conditions deteriorate rapidly this morning as SHRA/+SHRA spread from south to north across the area. Lowered CIG and VIS at all sites today leading to fluctuations between MVFR and IFR conditions at times, with intermittent LIFR conditions at KTPH and KELY. Dominant winds out of the south to southeast today range from 10 to 20 kts with gusts up to 35 kts, but winds jump significantly around 05Z with sustained winds of 25 to 35 kts or more and gusts approaching 40 to 50 kts. Localized stronger gusts from the erratic nature of tropical systems may cause very localized gusts stronger than these values. && .FIRE WEATHER...All zones will see showers and thunderstorms today and Monday with Chance of Wetting Rain (CWR) forecast at 70-95%. && .HYDROLOGY...Deep Tropical moisture associated with Hurricane Hilary has begun to move in from the south, following a northward track. Northern Nye and White Pine counties are already beginning to have impacts. Heavy showers and thunderstorms spread northward by Sunday afternoon, bringing impacts to the rest of our counties. The moisture, atmospheric instability, and weak lift associated with the decaying remnants of Hilary has the potential to produce moderate to heavy rainfall and the potential for strong thunderstorms to produce moderate to high rainfall rates from 1 to 2 inches per hour. Rainfall rates of this magnitude can produce localized flooding and flash flooding with major flooding possible. Portions of Central Nevada are forecast to receive 3-6+ inches QPF totals through Wednesday PM with isolated amounts of 8-10 inches and dangerous to catastrophic flooding impacts cannot be ruled out. && .LKN Watches/Warnings/Advisories... Flood Watch through late Monday night Humboldt County... 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. High Wind Warning from 10 PM this evening to 8 PM PDT Monday in Humboldt County...Northwestern Nye County. High Wind Warning from 6 AM this morning to 8 PM PDT Monday in Northeastern Nye County...Northern Elko County...Northern Lander County and Northern Eureka 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. && 95/85/85/95/95
The national radar mosaic for the moment the first event began.
6 high wind, 1 debris flow, 1 flood. Local standard time, as filed.
Station (MTHN2) Mather Raws, Elevation 9268 feet. Also of note: 1.79 inches of rain fell at the site from 4:11 PM LT on August 19th to 11:11 PM LT on August 20th, from Tropical Storm Hilary.
NVDOT reported a rockslide blocking the westbound lane on US-6, near NF-607. Heavy precipitation from Tropical Storm Hilary preceded the rockslide. Many sites reported 1-3 inches of rainfall with this event. Cattle Camp Raws, located 23 miles east of the rockslide, measured 2.17 inches of rain.
Station (TMBN2) Timber Mountain Raws, Elevation 9000 feet.
Station (DNEP2) Pinyon-Juniper Dri, Elevation 7225 feet. Also of note: 1.57 inches of rain fell at the site from 1:00 AM to 9:20 PM LT on August 20th, from Tropical Storm Hilary.
Station (DNEP3) LongNow Montaine Dri, Elevation 9250 feet. Also of note: 2.44 inches of rain fell at the site from 4:30 PM LT on August 19th to 4:40 PM LT on August 20th, from Tropical Storm Hilary.
Station (TMBN2) Timber Mountain Raws, Elevation 9000 feet. Also of note: 2.63 inches of rain fell at the site from 8:32 PM LT on August 19th to 10:32 PM LT on August 20th, from Tropical Storm Hilary.
SR-376 was washed out at mile marker 62 north of the city of Cavers, NV. Anywhere from 1-4 inches of rain from Tropical Storm Hilary fell across Nye County. Quima Peak Raws, located just 35 miles south of the washout, measured 3.96 inches of rain from the event. SR-376 from Cavers to US-50 has been closed as a result and remains closed indefinitely.
Station (MTHN2) Mather Raws, Elevation 9268 feet.
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, August 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: 1113289, 1113359, 1113371, 1113366, 1113291, 1113372, 1113323, 1113290.