Strong and severe thunderstorms spread south along the eastern slopes of the Bighorn Mountains during the afternoon and early evening.  These storms produced long periods of hail and very heavy rain.  Additional thunderstorms brought heavy rain to areas west and southwest of Casper, including the area near the Jackson Canyon fire burn scar.

Hail in JOHNSON, WYOMING
From 19-JUL-07 13:02:00 to 19-JUL-07 13:02:00 (MST-7)
Location: BUFFALO
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public report of nickel sized hail along U.S. Highway 16.

Hail in JOHNSON, WYOMING
From 19-JUL-07 14:13:00 to 19-JUL-07 14:13:00 (MST-7)
Location: BUFFALO
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Nickel sized hail reported by the public.

Hail in JOHNSON, WYOMING
From 19-JUL-07 14:49:00 to 19-JUL-07 14:49:00 (MST-7)
Location: BUFFALO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

One inch hail reported by the public along U.S. Highway 16.

Hail in NATRONA, WYOMING
From 19-JUL-07 16:29:00 to 19-JUL-07 16:44:00 (MST-7)
Location: POWDER RIVER
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Golf ball sized hail fell in Powder River for 10 to 15 minutes.

Hail in JOHNSON, WYOMING
From 19-JUL-07 17:21:00 to 19-JUL-07 17:21:00 (MST-7)
Location: KAYCEE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Golf ball sized hail reported near the Mayoworth Road.

Flash Flood in JOHNSON, WYOMING
From 19-JUL-07 18:00:00 to 19-JUL-07 22:30:00 (MST-7)
Location: KAYCEE
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 2.00K
Reported by: Trained Spotter

The North Fork of the Powder River flooded northwest of Kaycee as five inches of rain fell in about two hours.  State Highway 191, Mayoworth Road, had water flowing both over and under portions of the road.  Traffic was reduced to one lane on the road due to the flood waters.  A ranch bridge was washed out and 300 bales of hay were destroyed.

Thunderstorm Wind in JOHNSON, WYOMING
From 19-JUL-07 17:25:00 to 19-JUL-07 17:25:00 (MST-7)
Location: KAYCEE
Magnitude: 56.00 EG
Property damage: 0.50K
Crop damage: 4.00K
Reported by: Public

Four large cottonwoods were downed on a ranch northwest of Kaycee.  The trees narrowly missed a trailer, but did crush a ranch fence.

Flash Flood in NATRONA, WYOMING
From 19-JUL-07 16:35:00 to 19-JUL-07 17:10:00 (MST-7)
Location: MILLS
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flooding was reported along Poison Spider Road where water of one foot depth covered the road in four or five places.

Hail in JOHNSON, WYOMING
From 19-JUL-07 16:47:00 to 19-JUL-07 16:47:00 (MST-7)
Location: KAYCEE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nickel sized hail was reported north of Kaycee.

Flash Flood in NATRONA, WYOMING
From 19-JUL-07 19:00:00 to 19-JUL-07 20:00:00 (MST-7)
Location: GOOSE EGG
Flood cause: Heavy Rain / Burn Area
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain earlier in the day caused ash, mud, and debris from the Jackson Canyon Fire burn scar to cover private driveways near Goose Egg.  Access to State Highway 220 was cut-off due to the debris flow.