Powell storm history

The media reported A Montana woman was killed when a tree struck her during a weekend thunderstorm. She was reportedly running back to camp when a tree broke, striking her on the head. She died on the way to the hospital.

A line of thunderstorms marched northward across west-central Montana with gusty outflow winds. A gust of 59 mph occurred between Avon and Finn along Highway 141. Similar gusts occurred across the Windy Rock Fire southwest of Finn. No damage was noted.

Thunderstorm outflow wind gusts, no damage noted. Mesocyclone/wall cloud observed from MacDonald Pass webcam with this thunderstorm.

Radar signatures suggested the presence of severe hail. A report was received from a trained weather spotter of quarter size hail 5 miles west northwest of Helmville.

A thunderstorm near Ovando showed a bowing structure, indicative of strong outflow winds. Velocity on the lowest radar tilt showed winds near 50 knots. Mid-altitude radial convergence was also present, adding confidence to severe wind gust potential. A report was received that th…

A long-lived severe storm continued to produce 1 hail east of Seeley Lake. Additionally, it was reported the storm was producing heavy rain and winds up to 40 mph.

A strong thunderstorm dropped ping-pong-sized hail over the town of Helmville, Montana during the afternoon of July 14th.

A line of decaying thunderstorms produced a 65 mph wind gust at MacDonald Pass.

A line of thunderstorms produced 40 to 55 mph winds in Deerlodge with minor tree damage reported. Further south, a 67 mph wind gust was recorded north of Racetrack.

A thunderstorm produced half-dollar-sized hail in Ovando, with a truck sustaining hail dents on the roof of the vehicle.

Half dollar sized hail was reported by the public at the Deer Lodge Golf Club a few miles west of Deer Lodge.

Cottonwood Creek overflowed its banks in downtown Deer Lodge on the afternoon of June 19. The excessive runoff flooded basements and surrounded numerous homes as water covered a whole city block. The Clark Street Bridge was over topped and remained closed for over a day. In addit…

Several small creeks including Union and Nevada flooded nearby fields.

NWS employee reported quarter size hail 5 miles east of Garrison Junction. The hailstones were found one hour after the storm had passed. Thus, the hailstones were likely larger when it initially fell.

Large hail of 1' in diameter was reported by citizen at the Garrison Mercantile in Garrison at 3:57 pm MDT.

A member of the public reported one inch hail, which caused small damages to vehicles.

The Montana DOT weather sensor north of Avon, MT reported a gust of 60 mph between 9:38pm MDT and 9:45pm MDT. Sustained winds at this time were 49 mph.

A person from the public west of Deer Lodge estimated that quarter size hail fell during this event. Also a trained spotter located 1 mile west of Deer Lodge measured pea size hail and reported that large amounts of it had fallen.

A trained spotter measured 0.80 of rainfall in 20 minutes due to a thunderstorm.

According to a spotter 1 mile west of Deer Lodge 0.80 of rain fell in a time span of 20 minutes. This rain resulted in street flooding in the town of Deer Lodge with water lapping doors of many businesses. The Powell County fair and rodeo were impacted by the flooding especially …

The mesonet station EW4329 located 1 mile west-northwest of Elliston reported 0.74 of rain in one hour while the mesonet station TT234 located 7.7 miles north of Ovando reported 0.50 of heavy rain in an hour.

A trained spotter north of Racetrack estimated penny sized hail.

A very large right-moving supercell tracked east-northeast from Goldcreek to north of Avon bringing with it large hail, severe winds and heavy rain. A rancher 5 miles north of Avon reported a totaled barn, several trees that were either uprooted or broken in half. One of those tr…

A very large right-moving supercell unleashed up to ping pong sized hail that decimated a four to five foot tall hay crop. The hail covered the ground to a depth of 2 inches in spots. At least 10 windows were broken. Paint was chipped off from homes. Other damage included a green…

A very large right-moving supercell brought hail and wind damage to ranchers north of Avon. A rancher reported up to half dollar sized hail that brought considerable damage to their hay crop, and windows.

A very large supercell brought estimated 60 mph wind gusts that caused several trees to either uproot or break in half. Most of the trees fell in an easterly direction.

A person from the public reported hail to the estimated size of ping pongs that caused damage to the roof to their house and extensive damage to their camper. The hail lasted for approximately 10 minutes.

The hail began at 11:45 pm MDT and lasted for 10 minutes. The estimated quarter-size hail fell in the last two minutes of the event.

In 8 minutes 0.25 inches of rain fell.

The public reported quarter sized hail that covered the ground.

Cottonwood creek flooded parts of the town of Deer Lodge and down stream.

A fencing company in Avon reported one inch hail.

A trained spotter reported quarter sized hail coming down hard. He also received 0.35 inches of rain in five minutes.

The sheriffs office in Deer Lodge received one inch diameter hail.

An employee at Trixi's Bar in Ovando estimated nickel size hail and heavy rain.

A trained spotter reported a cottonwood tree fallen across the road.

A trained spotter reported estimated wind gusts of 60 MPH. Smaller tree branches were down with the largest branch estimated at four inches in diameter.

A trained spotter reported 0.75 inch hail from a passing thunderstorm.

A trained spotter reported 0.75 inch hail from a passing thunderstorm.

A trained spotter reported 0.75 inch hail from a passing thunderstorm.

Public reported 1.75 inch hail 1 mile east of Jens along Interstate 90.

Public reported 0.75 inch hail just north of Garrison, MT.

Public reported shingles knocked off the roof of a building due to thunderstorm winds.

Montana Department of Transportation weather station on Highway 141 near Avon recorded peak wind gust of 63 mph.

Large tree was blown over onto the deck of a home. The tree also knocked down several powerlines as well.

A member of the public reported hail stones that that were between quarter and golfball in size. Damage to a couple of cars was observed.