Bonneville storm history

Early on August 21st a thunderstorm caused trees to into a house on Pioneer Road in Idaho Falls killing an 82 year old man in his bedroom. Trees were also downed on East Lincoln Road.

At least 28 reports of 1 to 2 inch hail were reported in the Ammon and Idaho Falls area and extensive damage was reported to residential and business structures. Extensive automobile damage was reported as well. Emergency management and insurance company reports estimated the dam…

Two large carports were destroyed and blown into a wooden fence knocking it down. A trampoline landed on a utility trailer in the side of a residential yard. Several large tree limbs were knocked off a tree with isolated damage at a couple housed in the Ammon neighborhood.

The Antelope Flats mesonet station recorded a 62 mph thunderstorm outflow wind gust.

Rocky Mountain Power reported a power outage due to lightning strike off of N 55th E near US 26 in Ucon.

A 59 mph wind gust measured at Kettle Butte.

One inch hail measured in Swan Valley.

Wind gusts caused power outages in the Irwin area.

Sixty to 70 mph wind gusts estimated over Pine Creek Pass.

A 59 mph wind gust recorded at ITDE5 Palisades Dam mesonet site.

Mount Baird recorded a 65 mph wind gust.

A 2 to 3 foot diameter tree uprooted near Ucon.

Mesonet station 8419 D6 Kettle Butte US Highway 20 recorded 58 mph wind gust.

ITD reported minor flooding encroaching the shoulder of Highway 20 west of Idaho Falls due to increased snowmelt in that area.

The Kettle Butte RWIS site Kettle Butte recorded a 59 mph wind gust.

The mesonet station Moss Avery recorded a 58 mph wind gust.

A private weather station just east of Birch Creek Rd measured a 59 mph wind gust.

Large tree limbs were downed blocking 160 E near E Ririe Highway.

RWIS ITD18 Ririe site recorded a 66 mph wind gust.

Mesonet station PC219 Galbraith recorded a 59 mph thunderstorm outflow wind.

Media reported a large tree blown over onto a road in Ammon.

Tree downed across Sunnyside Road in Ammon blocking traffic.

About 2,600 customers in Idaho Falls without power due to thunderstorm winds.

A private weather station in Iona measured a 67 mph wind gust from thunderstorm outflow along E Lincoln Rd near Wood River Rd.

A 61 mph wind gust measured at the Antelope Flats RWIS site.

One inch hail reported at Calamity Campground.

Bear Lake Emergency Manager measured inch and quarter hail driving through region.

Heavy hail fell on boat on Palisades Reservoir with larger than quarter sized hail falling on video. 4 occupants received bruises from the hail.

Hail recorded on a boat on Palisades Reservoir with 2 more injuries due to bruising from hail.

The ITD Kettle Butte site on US 20 measured a 63 mph gust.

The Kettle Butte mesonet site measured a 62 mph wind gust.

A 62 mph wind gust measured at Kettle Butte.

A 71 mph wind gust measured at the Osgood site.

Rocky Mountain estimated 8,700 customers lost power due to thunderstorm wind damage in the Ammon area.

Large tree downed on S Midway Ave between E Owen St and E Molen St south of Ammon.

Quarter sized hail reported.

Dale Bitner site measured a 61 mph wind gust.

Idaho Transportation Department RWIS Idaho Falls site measured a 59 mph wind gust.

Funnel cloud seen near Herman.

One to 3 inches of rain fell in two hours in the Idaho Falls area resulting in extreme street flooding in downtown Idaho Falls with underpasses with several feet of water and cars submerged in water. This occurred at the 17th Street underpass. Multiple homes with severe flooding …

Thunderstorm wind combined with hail destroyed trailer.

One lane of Bear Creek Road in Swan Valley washed away due to extensive runoff and snow melt. Water flowing under the roadway caused the one lane collapse. It eliminated access to Calamity Campground. The collapse occurred on May 17th.

One inch hail reported by trained spotter in Swan Valley.

Several reports of rainfall in the 0.80 to just over an inch range from about 4 pm MDT to 5:30 pm MDT caused extensive nuisance street and parking lot flooding in the Idaho Falls area. One foot of water was reported across the intersection of Druvor St and Lowell Dr. Flooding was…

Quarter sized hail photographed near Irwin.

Spotter reported 1 inch hail just south of Irwin.

One inch hail fell near Thunder Ridge High School. Photograph provided.

A 61 mph wind gust from thunderstorm outflow measured at the Kettle Butte ITD site.

Large tree limbs downed on power lne on South Boulevard near E 23rd St in Idaho Falls. Power outage for 1,400 customers reported by Idaho Power.