An upper level low pressure system brought a round of thunderstorms to the Mojave Desert and southern Great Basin. Significant flash flooding occurred, along with isolated severe weather.

Lightning in SAN BERNARDINO, CALIFORNIA
From 15-OCT-15 01:20:00 to 15-OCT-15 02:15:00 (PST-8)
Location: LANDERS
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Lightning knocked out power to over 4000 customers and set fire to a palm tree between Landers and Twentynine Palms.

Flash Flood in INYO, CALIFORNIA
From 15-OCT-15 07:00:00 to 15-OCT-15 09:00:00 (PST-8)
Location: BALLARAT
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Numerous roads were closed in Death Valley National Park, and some were damaged.

Flash Flood in SAN BERNARDINO, CALIFORNIA
From 15-OCT-15 12:51:00 to 15-OCT-15 14:00:00 (PST-8)
Location: LANDERS
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Department of Highways

A vehicle was stuck in a flooded wash on Winter Road.

Flash Flood in SAN BERNARDINO, CALIFORNIA
From 15-OCT-15 13:35:00 to 15-OCT-15 15:00:00 (PST-8)
Location: JOSHUA TREE
Flood cause: Heavy Rain
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The intersection of Sunfair Road and Aberdeen Drive was flooded.

Flash Flood in SAN BERNARDINO, CALIFORNIA
From 15-OCT-15 14:25:00 to 15-OCT-15 16:00:00 (PST-8)
Location: TWENTY NINE PALMS
Flood cause: Heavy Rain
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Highway 62 was flooded between Larrea and Lupine.

Lightning in SAN BERNARDINO, CALIFORNIA
From 15-OCT-15 14:30:00 to 15-OCT-15 20:10:00 (PST-8)
Location: JOSHUA TREE
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Lightning set fire to five trees and one power pole in Joshua Tree and Twentynine Palms.

Flash Flood in INYO, CALIFORNIA
From 16-OCT-15 09:00:00 to 16-OCT-15 13:00:00 (PST-8)
Location: PARK VLG
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Several roads in Death Valley National Park, including Natural Bridge Road, Devil's Golf Course, and Mustard Canyon Drive were closed due to flooding.

Flash Flood in INYO, CALIFORNIA
From 17-OCT-15 05:19:00 to 17-OCT-15 07:00:00 (PST-8)
Location: TECOPA
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Highway 127 was flooded at Inyo County mile marker 8. One vehicle was overturned.

Flash Flood in INYO, CALIFORNIA
From 18-OCT-15 01:15:00 to 18-OCT-15 02:30:00 (PST-8)
Location: RYAN
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Badwater Road was closed due to flooding.

Flash Flood in SAN BERNARDINO, CALIFORNIA
From 18-OCT-15 14:12:00 to 18-OCT-15 16:00:00 (PST-8)
Location: HINKLEY
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water and debris flowed across Highway 58.

Flash Flood in SAN BERNARDINO, CALIFORNIA
From 18-OCT-15 14:55:00 to 18-OCT-15 16:30:00 (PST-8)
Location: ELORA STATION
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

Rocks and debris covered Black Canyon Road near Hole-in-the-Wall campground.

Flash Flood in SAN BERNARDINO, CALIFORNIA
From 18-OCT-15 15:15:00 to 18-OCT-15 17:00:00 (PST-8)
Location: KELSO
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

Kelbaker Road was closed due to rocks and debris.

Flash Flood in SAN BERNARDINO, CALIFORNIA
From 18-OCT-15 15:33:00 to 18-OCT-15 17:30:00 (PST-8)
Location: CALICO
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Fort Irwin Road was covered with nearly a foot of mud and debris.

Flash Flood in INYO, CALIFORNIA
From 18-OCT-15 16:25:00 to 18-OCT-15 18:00:00 (PST-8)
Location: DEATH VLY ARPT
Flood cause: Heavy Rain
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Highway 190 was flooded.

Flash Flood in INYO, CALIFORNIA
From 18-OCT-15 17:17:00 to 18-OCT-15 19:00:00 (PST-8)
Location: DEATH VLY JCT
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

State Line Road was closed from Death Valley Junction to the NV state line.

Flash Flood in INYO, CALIFORNIA
From 18-OCT-15 19:00:00 to 18-OCT-15 23:45:00 (PST-8)
Location: SCOTTYS CASTLE
Flood cause: Heavy Rain
Property damage: 25.00M
Crop damage: 0.00K
Reported by: Park/Forest Service

Major flash flooding hit the Grapevine Canyon area of Death Valley National Park. The Mesquite Springs Campground and Grapevine Ranger Station were evacuated; eight vehicles full of visitors and three park rangers were stranded overnight near Ubehebe Crater. Trenches up to six feet deep were cut into Scotty's Castle Road in Grapevine Canyon. 24 power poles were downed, the water treatment facility was heavily damaged, and water lines and the historic water tank were destroyed. The stables building and long house were heavily damaged. Two feet of mud and debris filled the visitor's center. Several inches of mud, rock, and debris also entered the cookhouse. Scotty's Castle measured 2.72 inches of rain in roughly five hours.

Flash Flood in SAN BERNARDINO, CALIFORNIA
From 18-OCT-15 19:27:00 to 18-OCT-15 21:00:00 (PST-8)
Location: GOFFS
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Goffs Road was closed due to two feet of water flowing over the road.

Flash Flood in SAN BERNARDINO, CALIFORNIA
From 18-OCT-15 20:25:00 to 18-OCT-15 22:00:00 (PST-8)
Location: BANNOCK
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A car was stuck in a low water crossing on Highway 95.

Flash Flood in SAN BERNARDINO, CALIFORNIA
From 18-OCT-15 23:45:00 to 19-OCT-15 01:30:00 (PST-8)
Location: IBIS
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Needles Highway was closed near River Road due to water flowing rapidly over the road.