Frost Advisory

* WHAT...Widespread frost conditions, with local areas of sub-freezing temperatures as low as 31 degrees

* WHERE...In California, valleys and basins in Modoc County. In Oregon, valleys and basins in Lake and Klamath counties. This includes the communities of Crescent, Chemult, Fort Rock and the rest of the Christmas Valley, Chiloquin, Sprague River, Bly, cities in the Klamath Basin, areas east of Lakeview, Canby, and Alturas.

* WHEN...From 3 AM to 9 AM PDT Tuesday.

* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. Animals not acclimated to these conditions may be harmed if left outside for extended periods.