Sanders storm history

At approximately 0400MST on December 11, a massive landslide occurred near Eagle View Lane, roughly 2 miles south-southwest of Bull Lake. The debris flow significantly damaged a residential garage, and the residents were unharmed. An Emergency Declaration was issued to address th…

A trained spotter reported 0.88 inch diameter hail.

A trained spotter reported pea to golf ball sized hail.

Widespread power outage in Thompson Falls with up to 4000 thousand customers without power. There was also a downed tree at the bottom of Cherry Creek Road around 7:20pm.

A thunderstorm containing very heavy rain moved directly over the Thorne Creek burn scar. Radar estimated 30 minute rainfall totals between 0.55 to 0.90 inches. A report was received from the forest service that a debris flow went over the Thompson River Road.

Strong winds snapped large limbs, estimated near 4 inches in diameter, off trees.

An owner of a general store reported large hail causing dented vehicles and trailers, holes in window screens, and damaged field crops.

Surface water from the Clark Fork River flooded the county road that accesses the sewage lagoons in Plains. The US Army Corps of Engineers had to construct levees to protect the sewage lagoons and they had to rep-rap county roads along the river to prevent roads from being washed…

The Clark Fork River again reached flood stage and caused flooding of the access road to the sewage lagoons outside of Plains.

Low lying areas were flooded by the Clark Fork River between Thompson Falls and Plains.

The Thompson River gauge near Thompson Falls peaked at 7.15 feet for 4.5 hours.

White Pine Creek, located 12 miles northwest of Thompson Falls overflowed and damaged White Pine Creek road so bad that one resident was isolated from getting back to their home. Elk Creek road near Heron sustained damage during this event.

Law enforcement reported trees down near Marten Creek Bay area.

The DES coordinator for Sanders County reported that the Little Bitterroot River flooded with 2 to 3 feet of water observed in places. The Little Bitterroot Road from Anderson's Corner to Sloan's Bridge was closed for 4 days. According to a river gauge located at one of the river…

A trained spotter reported that the power was out from 0230 to 0645 hrs MDT on August 26th.

A member of the public reported a strong thunderstorm with heavy rain, lightning gusty winds that moved through between 2 and 3 am MDT. They received 0.75 total rainfall measured.

The equipment at Sleeping Woman SNOTEL reported 1.00 rainfall in 12 hours.

A trained spotter reported 0.50 inches of rain in less than 30 minutes.

A slow moving thunderstorm dropped rainfall amounts of 1.59 inches up to an estimated 3.25 inches in a one to two hour period. Twenty five homes were flooded from runoff. One home owner had half their yard washed away with a shed also flooded.

The NWS storm survey team ran across a pile of hail 15 hours after the hail event occured which was still 0.75 inches in diameter. Hail was likely quite a bit larger when it initially fell.

A trained spotter two miles east of Dixon reported hail to the size of quarters with some larger pieces in the mix.

A trained spotter estimated penny to nickel sized hail.

A sheriff deputy reported one inch hail at mile marker 56 on Highway 200 that lasted about five minutes. The sheriff deputy had to pull over because of the intensity of the hail and rain.

Hot Springs RAWS reported 1.36 inches of rainfall in one hour at 3:29 PM MDT. Hot Springs Fire Department reported localized flooding of streets in Hot Springs.

Emergency Management reported nickel size hail in Perma.

Several large trees blown down. Windows blown out on mobile homes from straight line winds.

Spotter report from Dixon School of fences, power poles and large spruce trees with 2 1/2 diameter trunks broken and blown over.

County roads and private drives were flooded just off Highway 56 near Bull River.