During the late afternoon and evening of the 27th, intense thunderstorms produced significant rainfall and hail throughout the greater Reno metro area. This lead to several reports of flooded buildings as well as road closures due to flooding.
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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.
During the late afternoon and evening of the 27th, intense thunderstorms produced significant rainfall and hail throughout the greater Reno metro area. This lead to several reports of flooded buildings as well as road closures due to flooding.
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 Jul 27, 12:49 PM PST, 5 hours 11 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Reno NV 149 PM PDT Sun Jul 27 2025 .KEY MESSAGES... * Isolated showers and thunderstorms expected through Monday with an uptick in thunderstorm activity likely Tuesday and Wednesday. * Warm weather will continue this week and into the weekend with typical afternoon breezes outside of thunderstorm outflows. * Increased winds may elevate fire concerns next weekend, but confidence is low at this time. && .DISCUSSION... Showers and thunderstorms will continue to develop through the afternoon before tapering off around 9 PM PDT tonight. The most favorable area for thunderstorm impacts will be from Lassen County into the Surprise Valley and far N Washoe County where 30-50% odds exist. A second area of interest is across the Reno/Sparks metro and the Quad County communities where t-storm odds are 20-40%. This secondary area is a bit more uncertain as a belt of drier air aloft resides south of I-80, which may discourage thunderstorm development this afternoon. Moisture is more abundant in the northern regime where PWATs vary from 0.5-0.7", suggesting that heavy rain and isolated flooding is most probable with storms in NE California to the OR border. Farther south, a drier environment will limit the flooding potential and favor gusty outflow winds up to 50 mph. Propagating outflows may produce blowing dust near desert sinks and playas in the W NV Basin and Range. Small hail and lightning will also likely accompany any mature storm today. Monday afternoon likely features additional showers and thunderstorms, but further drying will lower chances to 10-30%. Weak low pressure will lift across the region Tuesday and Wednesday, replenishing instability and increasing thunderstorm potential. Extended guidance is also hinting at nocturnal showers and storms Tuesday night into Wednesday morning, although it's suspected this will depend on the timing of the lows passage. A drying trend late this week into the weekend will suppress afternoon convection after Wednesday, but isolated showers and storms cannot be ruled out. Otherwise, this week will continue to be devoid of heatwaves as daytime highs hover around 80F and 90F in the Sierra and western Nevada, respectively. A stronger low pressure passage is possible next weekend, which if materializes, would increase afternoon breezes and elevated fire concerns next weekend. -Salas && .AVIATION... Isolated showers and thunderstorms may impact KRNO-KCXP-KMEV through the afternoon before subsiding around 03-04Z. Chances of storms continue to decrease for Monday afternoon, but a stray thunderstorm cannot be ruled out -- mainly east of Sierra Front terminals. Thunderstorm activity trends upward Tuesday and Wednesday, otherwise typical afternoon breezes prevail. -Salas && .FIRE WEATHER... Thunderstorms and subsequent lightning ignitions continue to be the main concern, although the potential for dry lightning is reduced today and Monday as storm coverage/lightning density is limited. A weak low pressure passage around midweek will likely increase thunderstorm potential Tuesday and Wednesday as chances increase to 30-50%. Tuesday afternoon appears to be the better day for dry lightning, but coverage is favored to be greatest on Wednesday when storms transition to the wetter side. There are also hints of nocturnal lightning Tuesday night into Wednesday morning, although this a lower confidence scenario contingent upon the timing of the low pressure area. A drying trend will mitigate thunderstorm impacts after Wednesday with isolated lightning possible in favored areas each afternoon. A stronger trough may advance across the region sometime next weekend, which would increase afternoon breezes and elevate fire concerns. After several days of thunderstorms, any holdover lightning ignitions may flare-up in response to the increased winds. -Salas && .REV Watches/Warnings/Advisories... NV...None. CA...None. &&
Special Weather Statement
National Weather Service Reno NV
221 PM PDT Sun Jul 27 2025
CAZ072-272145-
Greater Lake Tahoe Area CA-
221 PM PDT Sun Jul 27 2025
...A STRONG THUNDERSTORM WILL IMPACT PLACER AND NEVADA COUNTIES
THROUGH 245 PM PDT...
At 221 PM PDT, Doppler radar was tracking a strong thunderstorm near
Northstar, or near Prosser Creek Reservoir, moving northeast at 15
mph.
HAZARD...Wind gusts up to 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Prosser Creek Reservoir, Glenshire-Devonshire Cdp, Hirschdale,
Truckee, Granite Flat Campground, Lakeside Campground,
Glenshire-Devonshire, Ca 89 At Placer-Nevada Co Line, Alpine Meadows
Campground, Hobart Mills, Boca Campground, Truckee-Tahoe Airport, and
Donner Memorial Campground.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3925 12018 3930 12026 3944 12019 3935 12002
TIME...MOT...LOC 2121Z 216DEG 12KT 3932 12017
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
TSSpecial Weather Statement
National Weather Service Reno NV
511 PM PDT Sun Jul 27 2025
CAZ071-072-NVZ002-280045-
Lassen-Eastern Plumas-Eastern Sierra Counties CA-
Greater Lake Tahoe Area CA-Greater Lake Tahoe Area NV-
511 PM PDT Sun Jul 27 2025
...A STRONG THUNDERSTORM WILL IMPACT SIERRA...NEVADA AND SOUTHERN
WASHOE COUNTIES THROUGH 545 PM PDT...
At 510 PM PDT, Doppler radar was tracking a strong thunderstorm over
Boca Reservoir, moving northeast at 15 mph.
HAZARD...Wind gusts up to 30 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Prosser Creek Reservoir, Stampede Reservoir, Boca Reservoir,
Floriston, Hirschdale, Glenshire-Devonshire Cdp, Truckee, Lakeside
Campground, Glenshire-Devonshire, Boca Rest Campground, Logger
Campground, Hobart Mills, and Boca Campground.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3934 12006 3936 12018 3955 12019 3942 11997
TIME...MOT...LOC 0010Z 204DEG 12KT 3940 12008
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
HRSpecial Weather Statement
National Weather Service Reno NV
522 PM PDT Sun Jul 27 2025
CAZ072-073-NVZ001-003-280045-
Greater Lake Tahoe Area CA-Mono CA-Greater Reno-Carson City-
Minden Area NV-Mineral and Southern Lyon Counties NV-
522 PM PDT Sun Jul 27 2025
...A STRONG THUNDERSTORM WILL IMPACT NORTHERN MONO...ALPINE...DOUGLAS
AND SOUTHERN LYON COUNTIES THROUGH 545 PM PDT...
At 522 PM PDT, Doppler radar was tracking a strong thunderstorm over
Topaz Lake, moving northeast at 10 mph.
HAZARD...Wind gusts up to 30 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Topaz Lake, Junction U.S 395 And CA 89, Holbrook Junction, and Topaz
Lake Campground.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3862 11951 3867 11961 3880 11959 3873 11936
TIME...MOT...LOC 0022Z 206DEG 7KT 3868 11952
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
HRSpecial Weather Statement
National Weather Service Reno NV
630 PM PDT Sun Jul 27 2025
NVZ003-004-280200-
Western Nevada Basin and Range including Pyramid Lake NV-
Greater Reno-Carson City-Minden Area NV-
630 PM PDT Sun Jul 27 2025
...A STRONG THUNDERSTORM WILL IMPACT STOREY...SOUTH CENTRAL WASHOE
AND CENTRAL LYON COUNTIES THROUGH 700 PM PDT...
At 630 PM PDT, Doppler radar was tracking a strong thunderstorm over
Virginia City, moving northwest at 10 mph.
HAZARD...Wind gusts up to 30 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Virginia City, Dayton, Junction U.S 50 And Six Mile Canyon-Ft
Churchill Rd, Six Mile Canyon, Nv 341 At Washoe-Storey Co Line, Gold
Hill, and Dayton Valley Airpark.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3929 11946 3920 11957 3931 11975 3943 11960
TIME...MOT...LOC 0130Z 132DEG 10KT 3929 11961
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
HRThe Reno radar (KRGX), 51 km away, was scanning. The volume nearest the first event began at 01:59 UTC.
2 flash flood, 1 debris flow, 1 hail. Local standard time, as filed.
Flash flooding leading to rockslides was reported by Storey County social media along Six Mile Canyon Rd.
Public reported 1 inch hail in south Reno. There were also multiple reports of 0.75 inch hail and accumulating hail throughout the city.
Nevada DOT Reno reported flooding on Rock Blvd which prompted the closure of the road near I-80.
Nevada State Police reported flooding on I-80 between Wells Ave and Virginia St prompting the closure of I-80 westbound lanes. Also, University of Nevada Reno reported flooding of buildings on campus and there was flooding reported throughout J Casino.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nevada in 2025Every state in 2025This day in weather historyWarnings in Nevada, July 2025
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: 1270565, 1270562, 1270564, 1270563.