Persistent moderate to high atmospheric moisture combined with daytime heating to produce thunderstorms (many with heavy rainfall) early in the month. Periods of slow-moving thunderstorms combined with the heavy rain to bring flash flooding to western Nevada. One of the top flash flooding events in the past 25 years affected Douglas County (Johnson Lane area) on the 8th and 9th.

Thunderstorm Wind in WASHOE, NEVADA
From 07-JUL-15 13:29:00 to 07-JUL-15 13:29:00 (PST-8)
Location: (RNO)CANNON ARPT REN
Magnitude: 56.00 MG
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm outflow produced this peak wind gust at the Reno-Tahoe International Airport. The Reno ATC Tower indicated that a Cessna aircraft was flipped by the strong winds (no damage estimate given).

Thunderstorm Wind in WASHOE, NEVADA
From 07-JUL-15 13:38:00 to 07-JUL-15 13:38:00 (PST-8)
Location: LEMMON VLY
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

This was a peak wind gust measured at the National Weather Service.

Thunderstorm Wind in WASHOE, NEVADA
From 07-JUL-15 13:35:00 to 07-JUL-15 13:35:00 (PST-8)
Location: SPARKS
Magnitude: 61.00 EG
Crop damage: 0.00K
Reported by: Social Media

KRNV News 4 posted a picture of a 70 foot tree which fell onto a house in Sparks.

Hail in DOUGLAS, NEVADA
From 08-JUL-15 12:47:00 to 08-JUL-15 12:47:00 (PST-8)
Location: DOUGLAS CO ARPT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash Flood in LYON, NEVADA
From 08-JUL-15 15:00:00 to 08-JUL-15 15:00:00 (PST-8)
Location: LUX
Flood cause: Heavy Rain
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Photographic evidence shows a vehicle stuck in flood waters on Prospect St. The occupant abandoned the vehicle and was rescued by fire department officials.

Flash Flood in DOUGLAS, NEVADA
From 09-JUL-15 10:45:00 to 09-JUL-15 12:30:00 (PST-8)
Location: DOUGLAS CO ARPT
Flood cause: Heavy Rain
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Social Media

Multiple videos from Reno news media (on Facebook) showed fast-flowing water over Stephanie Way and over low-water crossings at East Valley Road and Nye Dr. (near Johnson Lane). Douglas County sheriff's deputies noted several road closures in the area. Around 21 properties experienced damage from the flash flooding. Damages are approximate and based on the dividing of Douglas County Emergency Management's damage estimates for both July 8 and 9.

Thunderstorm Wind in CHURCHILL, NEVADA
From 08-JUL-15 14:56:00 to 08-JUL-15 15:05:00 (PST-8)
Location: FALLON
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Wind gusts of 61 to 63 mph were recorded at the Naval Air Station in Fallon. The highest wind gust was recorded at at 1505PST.

Flash Flood in DOUGLAS, NEVADA
From 08-JUL-15 13:15:00 to 08-JUL-15 16:00:00 (PST-8)
Location: DOUGLAS CO ARPT
Flood cause: Heavy Rain
Property damage: 2.00M
Crop damage: 0.00K
Reported by: Emergency Manager

Very heavy rainfall caused water to overflow washes and overwhelm drainage infrastructure in the Johnson Lane area. Water damage to 141 properties, including major damage to 4 homes and minor damage to 7 homes, was reported by Douglas County Emergency Management officials. Damages are estimated and may include some costs from flooding on July 9 (total damage 2.2M between the two days).

Flash Flood in WASHOE, NEVADA
From 09-JUL-15 16:40:00 to 09-JUL-15 16:40:00 (PST-8)
Location: EMPIRE
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Department of Highways

Reports from the Nevada Department of Transportation indicated water and debris over highway 447 south of Empire. The flooding caused significant erosion of road shoulders which required closure of the road for safety and repairs.