During the night of February 9th, strong Chinook winds developed over the eastern Slope of the Wind River Mountains. Temperatures climbed into the 50s as a result. These warm temperatures and strong winds brought rapid snowmelt of a deep snow pack and ice jams that produced flooding around portions of the Lander Foothills and Wind River Basin. In Lander, areas bordering Squaw Creek saw rapid increases in water levels. Water surrounded the Baldwin Creek Elementary School and flooded the Lander Museum and a few other local businesses. Some homes along Smith Road were evacuated. Rapid runoff and ice jams also caused flooding along the Little Popo Agie River. Homes in the flood prone areas of Lyons Valley flooded. The ice jams also caused rapid water rises and flooding in the northern and western portions of Hudson, where many homes and roads were flooded.

Flood in FREMONT, WYOMING
From 10-FEB-17 05:00:00 to 11-FEB-17 05:00:00 (MST-7)
Location: LANDER
Flood cause: Ice Jam
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Chinook winds caused rapid snow melt in the Lander Foothills that brought rapid snow melt. The warm temperatures caused rapid snow melt that rapidly increased river levels. In addition, the frozen Little Popo Agie river broke up rapidly and ice jams caused flooding of the flood prone areas in Lyons Valley. Several homes and farms in the low lying areas experienced flooding and several side roads were flooded with a few washed out.

Flood in FREMONT, WYOMING
From 10-FEB-17 05:00:00 to 11-FEB-17 17:00:00 (MST-7)
Location: RIVERTON
Flood cause: Ice Jam
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

A combination of rapid snow melt from a chinook wind and ice jams caused the Little Wind River near Riverton to rise to 10.8 feet, 2.8 feet above flood stage. The water for the most part remained in low lying areas and caused little damage.

Flood in FREMONT, WYOMING
From 10-FEB-17 03:00:00 to 11-FEB-17 10:00:00 (MST-7)
Location: HUDSON
Flood cause: Ice Jam
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Chinook winds caused rapid snow melt in the Lander Foothills that brought rapid snow melt. The warm temperatures caused rapid snow melt that rapidly increased river levels. In addition, the frozen Little Popo Agie and Popo Agie rivers broke up rapidly and ice jams caused flooding of the flood prone areas in Lyons Valley. Many homes in the flood prone north and west sides of towns along with surrounding low lying areas were flooded. Many of the side roads in the aforementioned areas of Hudson also saw flooding and minor wash outs.

Flood in FREMONT, WYOMING
From 09-FEB-17 22:00:00 to 10-FEB-17 02:00:00 (MST-7)
Location: (LND)HUNT FLD LANDER
Flood cause: Heavy Rain / Snow Melt
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Chinook winds warmed temperatures into the 50s early in the morning on the 10th and caused rapid snow melt that caused flooding in Lander. The flooding was concentrated around Baldwin Creek. Highway 287 between Lander and Fort Washakie was shut down for several hours. Water also flooded Smith Road, Main Street and Tweed Lane at times. Water surrounded some homes and forced a few evacuations. A few businesses as well as the Lander Museum experienced minor flooding during the event.