Boise storm history

Boise County Sherrif's dispatch reported a large number of trees down on and around Grimes Creek Road including one fatality at Grimes Creek.

Wind damage cut off power to 3790 people in the Horseshoe Bend, Crouch, and Placerville area as winds along a gust front moved through. Damage estimated to be 60 mph based on power pole damage.

Rain amounts of 0.2-0.3 inches in an hour caused a debris flow that trapped cars near MP 103 of Hwy 21. This surprisingly small amount of water produced a mudslide because of two important reasons. First, the Wapiti burn scar last year burned very intensely in the flood location,…

A small amount of water in a recently burned area with steep slopes allowed standing water to accumulate to 3 feet next to Hwy 21 near MP 80. This occurred around the same time as mudslides and rockslides on the same highway. While radar captured very little precipitation, this a…

A Forest Service official reported that Forest Service Road 555 (Scott Mtn Rd) was washed out as a result of a stream of water ran over the road. The radar estimated rainfall total was 0.3 inches, with a maximum estimated rainfall rate of 2 inches per hour. Timing was estimated f…

The COCORAHS station, ID-BS-8, 12.3 miles east northeast of Boise City measured 1.44 inches of heavy rain.

The mesonet station BNRI1, at Banner Summit, measured 1.03 inches of rain.

The mesonet station TS718 at Fox Trail Ridge measured 1.13 inches of rain.

The mesonet station, TCFI1, at Town Creek RAWS measured 1.11 inches of rain.

The mesonet station LTAI1 at Little Anderson measured 1.23 inches of rain.

The mesonet station LLGI1, at NRAWS 9, measured 1.18 inches of rain.

Heavy rains (0.75 inches estimated) caused 5 debris flows that came down the tributary that drains to the east portion of Camp Creek Basin. NWS employees took photos of one home that was damaged and reported that Grandjean Road was impassable due to mud and debris.

The mesonet station BASI1 measured heavy rain 15.9 miles west of Stanley.

Debris flows from heavy rain on the Bulldog Fire blocked parts of Forest Service Road 698.

Jackson Peak IRAWS reported this severe wind gust.

A member of the public reported hail that was 1.25 inches in diameter.

The CoCoRaHS station ID-BS-8 12.3 miles northeast of Boise City measured 0.94 inches of rain.

The mesonet station, LLFI1, measured 0.68 inches of heavy rain at the NRAWS 18 site.

The mesonet station, JKPI1, 8.7 miles East of Lowman, ID measured 54 knots of wind.

The mesonet station, JKPI1, 8.7 miles east of Lowman measured strong wind around 51 knots.

Bridge damaged on Centerville Road at milepost 4.5 from snowmelt flooding.

The mesonet station WWA01 10.7 miles southeast of Horseshoe Bend measured 1.56 inches of rain.

The Mesonet at Bogus Basin Ski Resort reported 6.0 inches of heavy snow.

The mesonet station MRKI1 10.6 miles south of Lowman, ID reported 1.20 inches of heavy rain.

The mesonet station GAVI1 2.1 miles southeast of Garden Valley, ID measured 0.66 inches of rain.

The mesonet station WWA01 10.7 miles southeast of Horseshoe Bend, ID measured 0.72 inches of rain.

The mesonet station LTAI1 near Little Anderson measured 0.83 inches of heavy rain.

A member of the public submitted this report via social media.

The Mesonet station, BASI1, east of Deadwood Reservoir measured 1.40 inches of total rainfall.

There was evidence of flooding near Cartwright Street north of Hidden Springs.

A tree was blown over onto a cabin in Garden Valley and downed trees and power lines closed a section of Highway 55 near the Banks to Lowman Road.

The Middle fork of the Boise River near Atlanta reached minor food stage due to snow melt. A number of county and Forest Service roads were damaged.

A 70 MPH thunderstorm wind gust was reported by the public.

A federal employee reported 0.88 inches of rain from a thunderstorm fell between 405 and 430 PM MDT and a mud slide or debris flow was reported by USACE employees. The mud slide affected a highly used campground in the area.

Debris was reported flowing across Highway 21 near Hayfork Campground.

Middle Fork Road and many camping areas were closed due to flooding and mud slides.

Flooding and debris flow closed numerous roads in the area.

A spotter near Horseshoe Bend reported large hail up to one inch and winds up to 60 MPH.

A National Weather Service employee reported road flooding on Porter Creek Road north of Horseshoe Bend.

The CWOP near Horseshoe Bend reported a wind gust of 58 MPH.

A mudslide was reported on Highway 55 about 3 miles north of Banks.

High winds knocked down several large trees near Holly Mountain. Power outages were reported in Idaho City, Placerville and Centerville Idaho.

Rockslides and flooding on Banks to Lowman Road and Highway 21 closed sections of the roads.

Trained spotters near Centerville reported hail from .88 inches to 1.75 inches.

Thunderstorm winds blew down trees and power lines along Harris Creek Road and knocked down trees and power lines in the Wilderness Ranch area.

Thunderstorm winds blew down large trees and power lines at Pine Flat Campground west of Lowman.

Town Creek RAWS reported a thunderstorm wind gust of 90 MPH.

Forest Service Roads were washed out with debris flows. The top end of Fall Creek road was washed out and the West Fork of James Creek near Atlanta road was also washed out. A new washout scar was seen in the wilderness area near Jackson Peak on the Upper North Fork of the Boise …

A National Weather Service incident meteorologist reported a pilot observed estimated 60 mph thunderstorm wind gust near the Chief Parrish Wildland Fire.

Reported at Terrace Lakes Golf Course