WHAT
Temperatures between 30 to 36 degrees will result in frost formation. Localized cold spots could reach into the upper 20s.

WHERE
In Idaho, Orofino/Grangeville Region, Southern Clearwater Mountains, Eastern Lemhi County, and Northern Clearwater Mountains. In Montana, Flathead/Mission Valleys, Kootenai/Cabinet Region, Lower Clark Fork Region, and Missoula/Bitterroot Valleys.

WHEN
From midnight MDT /11 PM PDT/ tonight to 9 AM MDT /8 AM PDT/ Monday.

IMPACTS
Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS
Take steps now to protect tender plants from the cold.