Uyarılar, McRae Number 1 Dam

Hydrologic Outlook issued February 20 at 3:25AM MST by NWS Billings MT ESFBYZ An deep and wet snowpack exists across the forecast area after a record setting February snowfall. 1 to 4 inches of water is locked in this snowpack. Much warmer temperatures forecast over the coming days will increase snowmelt, releasing this water. With the ground frozen, water will not be able to soak in and will run off. Water flowing overland and accumulating in low lying areas may result in localized flooding. Water flowing into creeks and streams will increase the potential for ice jam development and may result in additional flooding near waterways. Localized impacts from snowmelt may develop as soon as Friday over the western foothills and valleys. More widespread impacts are possible by the end of the weekend into early next week as overnight low temperatures hover above freezing, producing 24 hour snowmelt potential. Impacts...Water may accumulate near home foundations increasing the chance of basement flooding. Plugged culverts, ditches, and storm drains may result in water on area roadways at times. Water flowing into creeks and streams will increase the potential for ice jam development with additional flooding hazards. Unpaved roads may suddenly thaw and become muddy and impassable. The severity of the impacts will depend on how quickly the snowpack melts, how fast the ground thaws, and any precipitation. Preparation...While flooding is not imminent, if you have not already done so, now is the time to move equipment and livestock out of low lying areas, and away from waterways. Move any heavy accumulations of snow away from structures and take steps to prevent water from making it into basements. Clear any outside drains of snow. Do not drive over flooded roadways as the roadbed may be washed out. Be especially careful driving at night when water covered roadways are less visible. Stay tuned to the forecast for the latest temperature and precipitation trends, along with any warnings or advisories that may be issued. Please report any flooding to local law enforcement and have them relay the report to the National Weather Service.