Ada storm history

The BOI ASOS measured a wind gust of 68 MPH and several reports were received for wind damage including downed trees and power lines. Minor injuries were reported from the Western Idaho Fair as a result of temporary structures collapsing.

The Boise River remained in flood during the entire month of May due to planned release from Lucky Peak dam. Regulated flows were above flood stage for 101 days resulting in extensive damage to the Greenbelt and Nature Trail paths. Extensive flood fight efforts continued in the E…

The Idaho Transportation Department's Valley Interchange weather station south of Hazelton reported a 66 mph gust as a line of showers and embedded thunderstorms move through.

On the east side of the Valley Fire burn scar, heavy rainfall with a peak rain rate of 7 inches per hour caused a slurry of mud, ash, and debris to flow down eastern Highland Valley Rd, depositing nearly a foot of debris on the road with running water estimated at 12 inches high.…

Heavy rainfall rates on the recent Valley Fire burn scar created a debris flow that ran down the entire length of Highland Valley, half of which flowed into the Boise River and the other half into a canal. The slurry heavily impacted a community along Warm Springs, running water/…

Following the debris flow that impacted the community at the bottom of Highland Valley, the half of the flow that entered the canal followed the canal into another community near Barber. The flow was so high it crested a canal culvert and began flowing down streets of the suburba…

A training thunderstorm persisted near Arrowrock Dam for about 45 minutes with rain rates between 3 and 6 inches per hour. Rocky cliff faces and steep valleys allowed water to accumulate, though soil/brush retention absorbed most of the rain. While Arrowrock Road was still drivab…

Mesonet station IDARNG2_RG14 measured a wind gust of 63 mph as a thunderstorm outflow passed. This outflow continued into Elmore county. No damages were reported.

The ASOS station at the Boise airport reported a high wind gust from a thunderstorm outflow boundary.

A large spruce tree was knocked down at Morris Hill Cemetery.

The public reported a large spruce tree down.

The public reported a large spruce tree was knocked down along with old juniper trees. Idaho Power reported that this caused 2000 customers to be without power in the Boise North End.

The Crestline Trail RAWS measured this wind gust.

A strong outflow boundary from a thunderstorm damaged several power lines around the Boise metropolitan area and Garden Valley. Around 2,000-3,000 people were estimated to be without power in both of those regions due to wind damage.

The mesonet station, LLAI1, at the Boise WFO measured 0.72 inches of rain.

An NWS Employee measured 0.75 inch hail from this storm.

A member of the public measured 1.0 inch hail from this storm.

A member of the public measured 1.0 inch hail from this storm.

A member of the public reported their portable shed was lifted and damaged siding on their house from the outflow wind gust from a thunderstorm near Kuna, ID.

The official NWS measurement after a 24 hour period was 2.42 inches of rain.

The mesonet station LLAI1 at Boise measured 2.42 inches of heavy rain.

The mesonet station FW9039 in Boise measured 1.25 inches of heavy rain.

The ASOS at the Boise airport measured 0.73 inches of rain. The mesonet station GW0891 one mile south of Boise measured 0.81 inches of rain.

Street flooding with eight inches of standing water over the roads in Eagle was reported.

A large tree was reported down across the Greenbelt Bike Path.

A tree fell on Park Center Boulevard and Highland Street, which blocked several lanes.

There were numerous reports of tree damage with large branches down on social media.

An NWS employee reported 50 knots of wind in southeast Boise.

The mesonet station, TT289, on Crestline Trail, measured 50 knots of wind.

An NWS employee measured a wind gust of 50 knots in downtown Boise.

The mesonet station, TT289, on Crestline Trail measured 50 knots of wind.

Thunderstorms produced heavy rain across portions of the Lower Treasure Valley, including the city of Boise. Social media, weather spotter, and emergency manager reports indicated localized flooding.

A fence was knocked down in the Boise Bench at a residential property.

A large tree branch was knocked down in a residential property in the West Bench neighborhood.

A few rotten trees were knocked down south of Meridian.

A large tree was knocked down on the Boise Bench.

A couple of large trees were knocked down near Quinn's Pond on the Boise Greenbelt.

The mesonet station TT289 up on Crestline Trail measured a severe gust.

Several trees on a residential property were knocked down from thunderstorm outflow.

The mesonet station at BSUI1 measured 1.32 inches of heavy rain.

The mesonet station BOII 1.7 miles southeast of Boise measured 1.15 inches of heavy rain.

The mesonet station LLAI1 at the Boise Weather Forecast Office RAWS measured 1.13 inches of rain.

The mesonet station 1452D 2 miles east of Boise measured 1.10 inches of rain.

The mesonet station GW0891 in Boise measured 1.09 inches of rain.

The mesonet station TT289 at Crestline Trail in the Boise foothills measured 1.08 inches of heavy rain.

A rainfall total of 0.74 inches was measured by CoCoRaHS station ID-AD-21.

A rainfall total of 0.74 inches was measured at CoCoRaHS station ID-AD-46 in Boise.

A rainfall total of 0.74 inches was reported by a member of the public one mile northeast of Boise.

Localized flooding occurred on State Highway 167 and State Highway 45.