* WHAT...Temperatures as low as 34 will result in frost formation. Temperatures may vary due to clearing or fog development in localized areas.
* WHERE...Portions of northwest and west central Washington.
* WHEN...From midnight tonight to 9 AM PDT Saturday.
* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.
* ADDITIONAL DETAILS...The growing season officially ends on October 31, after which no further frost or freeze headlines will be issued.