Flooding potential this spring indicated “moderate to high” for the Wind River

(Riverton, Wyo.) – The National Weather Service has issued the April Spring Snowmelt Flood Potential Outlook that shows a moderate to high potential for flooding along the Big Wind River between Crowheart and Riverton according to Jim Fahey, Wyoming NOAA hydrologist.

“This outlook is based on various diverse hydrological factors such as snow water equivalents (SWEs) in the mountain snowpack, basin morphology (i.e. how basins respond to snowmelt), extent of burn scars from 2012 and 2013 fires, amount of bark beetle kill, soil moisture trends, and likely temperature and precipitation trends during peak runoff,” according to the report. 

“Mountain snowpack and associated snow water equivalents (SWEs) across Wyoming continued to be above average (at 130% of median) by late April.  SWEs at the peak snowmelt runoff elevations (8,000’ – 9.500’) continued to be the highest across basins along the northern third of Wyoming at 130 to 160 percent of median.  The Upper Green Basin had SWEs at 150 to 165 percent of median by late April.”

Potential Flooding areas:

Moderate to High potential for flooding associated with snowmelt runoff is expected across various headwater streams along the central and southern Big Horn Mountains.  Streams with the highest potential for flooding include:  Middle Fork of the Powder River (Kaycee), Medicine Lodge Creek, Ten Sleep Creek (Ten Sleep), and Nowood River (Manderson)…

Moderate to High potential for flooding due to snowmelt is also expected along the Encampment River near Encampment/Riverside and the North Platte River at Saratoga…

Moderate to High potential for flooding associated with snowmelt runoff is forecasted along the Wind River (Crowheart to Riverton), the North Fork Shoshone River near Wapiti, and the South Fork the Shoshone River downstream of Valley…

Moderate to High potential for flooding associated with snowmelt runoff is expected along the Green River near LaBarge…

Moderate potential for flooding due to springtime snowmelt is expected along Clear Creek near Buffalo, Little and Big Goose Creeks near Sheridan, Salt River and tributary streams, and various headwater streams along the Upper Green Basin…

Other hydrological information for Wyoming can be found at the NOAA hydrology website by clicking here.