Frost Advisory

* WHAT...Temperatures as low as 34 will result in frost formation.

* WHERE...High terrain areas of Southern Cook County away from the immediate lakeshore.

* WHEN...From 9 PM this evening to 7 AM CDT Saturday.

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

* ADDITIONAL DETAILS...This Advisory is primarily for areas away from the immediate shorelines as those lakeshore area temperatures only drop down to the upper 30s where frost is not expected.