Cascade storm history

BTCM8, Belt Creek near Monarch, crested at 6.79 feet on May 17th. Water levels resulted in strong currents that claimed the lives of two men visiting from Canada. The two men went into the fast moving water to retrieve their dog. The dog made it to shore, but the two men were pul…

A high wind event moved across north central Montana on the 12th. Sustained wind speeds of 40 to 50 mph were very common throughout the afternoon, and into the evening hours. Wind gusts were near 70 mph during the peak of the event. These winds started to increase in strength aro…

RSOIS equipment at wfo Great Falls measured a 62 mph gust associated with a convective shower.

ASOS station KGTF Great Falls Airport. A few lighting strikes developed south of town after the initial gust blew through.

MT mesonet station Sun River SE.

Asos station Kgtf Great Falls Airport.

Ambient weather station north of Great Falls.

Ambient weather station. Sustained winds were 55 mph at the time of observation.

AWOS station K1IM India measured the gust.

Public reported 1 inch hail. Time of report estimated via radar.

There was a report of 6 inches of flowing water in the street in northwest Great Falls. Garbage cans floating down the street. There was another report of water covering 15th Street North in Black Eagle. No specific damages or injuries were reported from the flooding.

Facebook report of 1 inch hail in Tiger Butte.

Corrects previous hail report from 9 WNW Monarch. Facebook report of 1 inch hail in Tiger Butte.

Ambient weather sensor in northern Cascade county measured a 59 mph gust.

Mping report of quarter sized hail.

Quarter size hail reported by member of the public.

Quarter size hail reported. Damage to vehicles and RV reported as well.

Public report with image of quarter sized hail next to a quarter for reference.

Quarter sized hail reported.

Trained spotter reports quarter size hail along with 30 to 50 mph winds along highway 87 north of the Republic Services Landfill and south of Dent Bridge Road.

Social media report of three quarter of an inch to an inch sized hail.

Social media report of 1 inch hail. Time and location estimated.

Quarter sized hail reported.

Trained spotter reports quarter size to slightly larger than quarter size hail.

Ambient weather station measured gust.

Corrects previous non-thunderstorm wind dmg report from 2 SW Great Falls to Thunderstorm Wind Dmg. Large conifer tree snapped and down on Cherry Dr in Fox Farm area.

A 68 mph gust measured at NWS Great Falls (corrected from Non-Tstm Gust to Tstm gust).

A 63 mph gust at Ambient weather station.

A 59 mph gust at ambient weather station (corrected from Non-Tstm Gust to Tstm gust).

A 58 mph gust at Ambient weather station (corrected from Non-Tstm Gust to Tstm gust).

A 63 mph wind gust measured at a ambient weather station on NW side of Great Falls.

A 65 mph gust measured at Ambient weather station on west side of Great Falls.

AWOS station K1IM India measured a severe gust.

Ambient Weather Sensor measured gust.

Mesonet station FW1843 measured a severe gust 10 miles WSW of Stockett.

ASOS station KGTF Great Falls Airport measured a sever gust.

Ambient weather sensor measured a severe gust.

Mesonet station MTM76 Cascade E MDA measured a severe gust.

Public report of a 59 mph gust. Time estimated using radar.

ASOS station KGTF Great Falls Airport measured a sever caliber gust.

Public weather station reported a severe caliber gust. Location was estimated.

Time and location estimated. Hail stones between 1 and 1.5 inches were observed.

A gust of 70 mph was measured north of Great Falls. Location is estimated.

Malmstrom AFB personnel reported half dollar size hail occurring on base.

Spotter reported quarter size hail in Belt.

Reports on social media of vehicles in Wayne being dented from large hail.

Measured via Ambient Weather. Air temperature dropped from 90 degrees to 72 with passage of storm.

Measured via site KMTUlm7.

Water and debris rushed across several areas of Wilson Butte Road resulted in damage and impacts. Water flowed out of the rockier boulder terrain on the east side of the road, crossed the road with water depth being 2 to 3 feet deep at times. Water and debris entered at least two…

Employee reported one inch hail on southeast side of Great Falls. Started off as small hail.