Lewis and Clark storm history

Continued Canyon Ferry Complex - includes Broadwater County, 38570 acres burned, cause unknown, 13 residents destroyed, 37 outbuildings destroyed.

Canyon Ferry Complex - includes Broadwater County, 38570 acres burned, 13 residences destroyed, 37 outbuildings destroyed, unknown cause, continued past July 31.

Spotter network report of a large tree down across a fence. Time of damage estimated using radar.

AWOS station K1GM Golf. Thunderstorm wind gust of 51 mph.

Jimtown Road and the Riverside Campground was closed due to debris flow from the burn scar flooding. Media also reported a 15 foot debris flow caused by the flooding washed away two trucks and a shed to the shores of Canyon Ferry Lake.

AWOS station K1GM Golf measured a 59 mph wind gust.

ASOS station KHLN Helena Airport measured a 60 mph wind gust.

AWOS station K1GM Golf measured a 61 mph wind gust.

ASOS station KHLN Helena Airport measured a 62 mph wind gust.

A 61 mph wind gust measured at the Helena Airport.

Ambient Weather Sensor near East Helena measured a severe gust.

Lewis and Clark County emergency management reported that Jimtown rd was closed due to a water/debris flow flash flood originating from the Horse Gulch burn scar. Broadcast media report: Although 12 campers were stranded as a result of the flash flood, no one was injured, and no …

Trained spotter reports a 62 mph gust.

Personal weather sensor measured a 62 mph gust.

Public weather station reported a gust of 58 mph.

MDT sensor MTSBN Sieben Flats measured a severe gust.

Mesonet station EW3831 measured a 61 mph gust.

AWOS sensor K1GM Golf measured a severe gust.

Trained spotter reports hail of 1.5 inches in diameter.

Trained spotter reported heavy rain and quarter sized hail.

ASOS station KHLN Helena Airport measured a 59 mph gust from outflow.

ASOS station KHLN Helena Airport measured a 59 mph gust from outflow.

Measured by MT Department of Transportation site Bowmans Corner.

Measured via military AWOS station K1GM Golf.

ASOS station KHLN Helena Airport measured a severe caliber gust behind the main line of thunderstorms.

Two male individuals (ages 22 and 21) were struck by lightning while playing disc golf. Both were knocked unconscious. One of the individuals regained consciousness and performed CPR on the other, who was later flown to Salt Lake City for advanced medical care. As of early July 2…

Spotter reported water flowing across several secondary roads as well as culverts flooding.

A significant debris flow crossed Benchmark Road, west of Ford Creek, resulting in the road being impassable from debris and damage.

The Mid-Canon fishing access site near Craig was closed due to flooding by high river levels along the Missouri River.

Lewis and Clark County Sheriff's Office reported the high bridge over the Dearborn River was washed out. Public works closed the road at Flat Creek. Several secondary roads across the area were flooded at times. Flooding across northwest Helena also occurred, especially west of B…

Mesonet station MTMDP Macdonald Pass reported 54 knot wind gust.

AWOS station K1GM Golf reported 53 knot wind gust.

ASOS station KHLN Helena Airport reported 53 knot wind gust.

Ambient weather station NE of Helena Airport reported 50 knot wind gust.

Ambient weather station ENE of Iron reported gust of 58.2 mph.

AWOS station K1GM Golf reported 51 knot wind gust.

Mesonet station Sieben Flats MDT.

Trained spotter reported up to penny sized hail.

An ambient weather station measured 62 mph wind gust near Lake Helena.

Photo on social media shows ground covering hail with up to quarter sized stones. Time estimated from radar.

Trained spotter reported 1 inch hail in Marysville.

Trained spotter reported 1.98 inches of rainfall per hour. Winds gusting 32 mph.

DOT sensor on MacDonald Pass measured 64 mph wind gust. Reports heavy rain as well.

Rainfall of 0.73 inches fell in 16 minutes.

Rainfall of 1.11 INCHES recorded in 15 min per Ambient Weather station.

Rainfall of 1.04 inches measured in 10 min per Ambient Weather station.

Rainfall amount fell in 10 min per Ambient Weather station.

Report via trained spotter.

Observer recorded .54 inches of rain in 10 min. Rain total was 0.57 inches.

Event total of 2.1 inches.