Hot temperatures brought isolated, high-based thunderstorms with strong outflow winds and a very localized flash flood.
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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 REV wrote it up.
Hot temperatures brought isolated, high-based thunderstorms with strong outflow winds and a very localized flash flood.
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 Reno, NV wrote its last area forecast discussion before the first event at Jun 20, 1:54 PM PST, 3 hours 52 minutes earlier.
Area Forecast Discussion National Weather Service Reno NV 254 PM PDT Tue Jun 20 2017 .SYNOPSIS... High pressure will bring much above average temperatures through the weekend, with records possible through Wednesday. Isolated to scattered thunderstorms will be possible through Thursday, mainly south of Highway 50. Snowmelt flooding will continue for the creeks and streams in Mono County, with more significant concerns for the West Walker and mainstem Walker River. && .DISCUSSION... The main change to the forecast through early next week was to raise high temperatures Saturday through Monday. Isolated to scattered mid-afternoon through evening thunderstorms will still be possible through at least Thursday, mainly south of Highway 50 and near the Sierra. Isolated thunderstorms this evening have the potential to drop wind gusts to 50 mph or more out in the Basin and Range given surface temp/dewpoint spreads in excess of 60 degrees and SPC mesoanalysis showing DCAPE over 2000 J/KG. A weakness between ridges over the eastern Pacific and the Desert Southwest will move over northeast California and western Nevada for Wednesday and Thursday. This should allow mid-level temperatures to remain just cold enough to tap into some instability with daytime heating, along with convergence for showers and thunderstorms near the Sierra south of Highway 50 and out into Mineral County. A few cells could also drift out into Douglas or southern Lyon Counties Wednesday evening with light south to southwest flow aloft. Thunderstorms Wednesday and Thursday are not expected to be overly strong, but outflow winds to 45 mph and localized areas of moderate to heavy rainfall (little storm movement) could accompany storms. Friday and Saturday, the weakness in between the Pacific/Desert Southwest ridges is expected to fill in over the region. This should allow temperatures to creep back up to around the century mark in the lower valleys for the weekend. Temporary subsidence warming/increased capping aloft as the ridge builds overhead should give way over the weekend as intense terrain heating persists. This should bring back isolated thunderstorms by Sunday. In fact, it could even return by Saturday evening, but probabilities are only around 10% for the Sierra and as a result storms were left out for now. The start of next week promises continued hot conditions under the ridge. However, by next Tuesday signs are pointing to a brief easing of the heat (along with increasing winds) as energy moving into the Pacific Northwest flattens the upper ridge. Snyder && .AVIATION... Isolated thunderstorms are expected between mid-late afternoon and around sunset, generally east of Highway 395 and south of Highway 50, and possibly north and northeast of Eagle Lake in Lassen and northern Washoe Counties. Outflow winds up to 45 kts will be possible with stronger storms today. Even though storms are not expected to affect any northeast CA/western NV terminals directly, there could be some indirect impacts from gusty outflow winds and blowing dust for Basin terminals including KLOL and KNFL. Wednesday, thunderstorms continue to be possible between 21Z/2PM and 04Z/9PM, mainly south of Highway 50 in the Sierra and out into extreme western NV. Gusts to 35-40 kts could accompany stronger storms, with brief moderate to heavy rain also possible as thunderstorm motions are expected to remain slow. Snyder && .REV Watches/Warnings/Advisories... NV...None. CA...None. && For more information from the National Weather Service visit... http://weather.gov/reno
Special Weather Statement
National Weather Service Reno NV
342 PM PDT TUE JUN 20 2017
NVZ004-202315-
Western Nevada Basin and Range including Pyramid Lake NV-
342 PM PDT TUE JUN 20 2017
...Thunderstorm West of Lahontan Reservoir...
At 335 PM PDT, Doppler radar was tracking a thunderstorm over Fort
Churchill Station, or 16 miles southwest of Lahontan Reservoir,
moving northeast at 10 to 15 mph.
Winds in excess of 40 mph will be possible with this storm.
Locations impacted include...
Lahontan Reservoir, Fort Churchill Station, Stagecoach, Silver
Springs and Silver Springs Airport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If on or near Lahontan Reservoir, get out of the water and move
indoors or inside a vehicle now. Don't be caught on the water in a
thunderstorm. Strong wind gusts and lightning pose an immediate
danger to boaters.
&&
LAT...LON 3919 11923 3926 11944 3954 11933 3948 11907
3939 11895
TIME...MOT...LOC 2241Z 204DEG 15KT 3933 11929
WHSpecial Weather Statement
National Weather Service Reno NV
433 PM PDT TUE JUN 20 2017
CAZ071-NVZ001-004-005-210100-
Lassen-Eastern Plumas-Eastern Sierra Counties CA-
Western Nevada Basin and Range including Pyramid Lake NV-
Northern Washoe County NV-Mineral and Southern Lyon Counties NV-
433 PM PDT TUE JUN 20 2017
...Thunderstorms with Gusty Winds this Afternoon...
Thunderstorms have developed in western Nevada and northeast
California this afternoon. Expect gusty winds of 40-50 mph with
these storms that could cause reduced visibility on area roadways
due to dust. Brief heavy rain, small hail and lightning can also be
expected.
LAT...LON 3955 11749 3910 11778 3900 11819 3847 11770
3789 11835 3854 11933 3936 11947 3962 11926
4019 11976 3945 12000 3946 12001 3969 12068
4059 12132 4118 12133 4119 12000 4200 11999
4199 11932 4096 11933 4068 11730
TIME...MOT...LOC 2328Z 240DEG 0KT 3956 11898
ZTPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RENO NV
626 PM PDT TUE JUN 20 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0605 PM TSTM WND GST 6 SE FALLON MUNICIPAL A 39.43N 118.69W
06/20/2017 M52 MPH CHURCHILL NV ASOS
BLOWING DUST VISIBILITY REDUCED TO 1/2 MI.
&&
JOHNSTONThe Reno radar (KRGX), 84 km away, was scanning. The volume nearest the first event began at 01:46 UTC.
3 thunderstorm wind, 1 flash flood. Local standard time, as filed.
The wind gust was measured at Lovelock-Derby Field. Visibility was reduced to 1.25 miles due to blowing dust with the outflow winds. Another thunderstorm brought visibility as low as 1/4 mile between 1810PST and 1820PST (with gusts up to 53 mph).
The wind gust was measured at Lovelock-Derby Field. The wind was generated by outflow from earlier thunderstorms.
The wind gust (from the south) was measured at the Minden-Tahoe airport.
Thunderstorms with heavy rainfall persisted for almost 2 hours in the hills east of Yerington (near the Lyon/Mineral County line). A deputy sheriff reported a large wall of water coming down from the hills (in a typically dry wash). A National Weather Service employee investigated the scene a week later and noticed high water marks as much as 2.5 feet above Prospect St, with water damage to landscaping for multiple properties. Appreciable sediment was noted on Bybee Ln, Almond Rd, and Prospect St, with damage to Bybee Ln. (unpaved road). Damage roughly estimated based on little or no known home damage (mainly landscaping, unpaved roads).
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nevada in 2017Every state in 2017This day in weather historyWarnings in Nevada, June 2017
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: 715678, 715679, 715682, 715711.