Dense Fog Advisory issued December 17 at 12:14PM MST until December 17 at 6:00PM MST by NWS Great Falls MT

* WHAT…For the Dense Fog Advisory, visibility as low as one
quarter of a mile. For the High Wind Warning, west winds 30 to 40
mph with gusts up to 65 mph expected.

* WHERE…Helena Valley.

* WHEN…For the Dense Fog Advisory, until 6 PM MST this evening.
For the High Wind Warning, from 11 AM Wednesday to midnight MST
Wednesday Night.

* IMPACTS…Low visibility could make driving conditions hazardous.
High winds may move loose debris, damage property and cause
isolated power outages. Travel could be difficult, especially for
high profile vehicles.