Daytime heating and ample moisture along the periphery of a ridge caused scattered convection over western Nevada and the eastern Sierra July 19th through the 25th. Several storms produced heavy rainfall which led to flash flooding and debris flows. Hail was also reported with some storms.

Debris Flow in LYON, NEVADA
From 20-JUL-18 13:25:00 to 20-JUL-18 15:30:00 (PST-8)
Location: WELLINGTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Nevada Department of Transportation reported that State Route 338 was closed in both directions from the California State Line to approximately Lyon County milepost 20 due to multiple debris flows. State Route 338 was closed from approximately 20 July 1313PST to 1948PST. No damage/cleanup estimates were available.

Debris Flow in WASHOE, NEVADA
From 21-JUL-18 15:00:00 to 21-JUL-18 16:00:00 (PST-8)
Location: VISTA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Sparks Police Department reported a debris flow/mudslide near the Vista Blvd-Loop Rd. intersection in Sparks. All traffic was stopped near the intersection. The debris flow was triggered by heavy rainfall due to slow-moving thunderstorms. Mesonet CW3920 Sparks (elevation 4596 feet) reported 0.65 inches of rain from 21 July 1403PST to 1518PST. No damage/cleanup estimates were available.

Flash Flood in WASHOE, NEVADA
From 21-JUL-18 16:40:00 to 21-JUL-18 17:00:00 (PST-8)
Location: VISTA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Sparks Police Department reported heavy flooding near the industrial area of Sparks due to heavy rainfall from thunderstorms. Sparks University of Nevada Reno Agricultural Experimental Farm Mesonet (elevation 4390 feet) reported 0.44 inches of rain from 21 July 1420PST to 1450PST. No damage/cleanup estimates were available.

Heavy Rain in WASHOE, NEVADA
From 21-JUL-18 14:00:00 to 21-JUL-18 16:00:00 (PST-8)
Location: LEMMON VLY
Reported by: ASOS

Reno-Tahoe International Airport ASOS (elevation 4403 feet) measured 1.29 inches of heavy rainfall from thunderstorms within a 2-hour period from 21 July 1400PST to 1600PST.

Heavy Rain in WASHOE, NEVADA
From 21-JUL-18 14:50:00 to 21-JUL-18 18:50:00 (PST-8)
Location: HUFFAKERS HILLS
Reported by: RAWS

GALN2 RAWS, 4 miles north-northwest of Washoe City (elevation 5610 feet) reported 2.67 inches of rainfall from thunderstorms in a 4-hour time period from 21 July 1450PST to 1850PST.

Debris Flow in WASHOE, NEVADA
From 21-JUL-18 17:55:00 to 21-JUL-18 18:25:00 (PST-8)
Location: WASHOE CITY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained weather spotter reported a debris flow and heavy pea-size hail due to thunderstorms near the Reindeer Lodge along Nevada State Highway 431 (Mount Rose Highway). No damage/cleanup estimates were available.

Heavy Rain in WASHOE, NEVADA
From 21-JUL-18 16:21:00 to 21-JUL-18 19:21:00 (PST-8)
Location: HUFFAKERS HILLS
Reported by: NWS Employee

NWS Employee measured 1.12 inches of rainfall in a 3-hour period from 21 July 1621PST to 1921PST at their home in the Damonte Ranch/South Reno area.

Debris Flow in MINERAL, NEVADA
From 22-JUL-18 16:20:00 to 22-JUL-18 17:27:00 (PST-8)
Location: MARIETTA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain from a thunderstorm west of Nevada State Highway 359 drained into Corey Canyon and across Nevada State Highway 359. Mineral County Emergency Managers/Sheriffs reported a debris flow that extended from Nevada State Highway 359 at Corey Canyon to Hawthorne. This debris flow caused Nevada State Highway 359 to be closed for several hours. No damage/cleanup estimates were available.

Debris Flow in WASHOE, NEVADA
From 21-JUL-18 16:04:00 to 21-JUL-18 19:04:00 (PST-8)
Location: STEAMBOAT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

KRNV NBC Channel 4 reported a debris flow over Kivett Lane south of Geiger Grade Road due to heavy rainfall from thunderstorms in the area. The debris flow occurred several minutes before photographs were taken. No damage estimates were available.

Heavy Rain in DOUGLAS, NEVADA
From 21-JUL-18 13:50:00 to 21-JUL-18 17:35:00 (PST-8)
Location: JACKS VLY
Reported by: Mesonet

Mesonet station SCRN2, 5 miles northeast of Washoe City (elevation 4614 feet) reported 1.15 inches of rainfall over a 3 hour and 45 minute period from 21 July 1350PST to 1735PST.