Dense Fog Advisory until 12:00PM 
* WHAT...Visibility less than one half mile in dense fog.
* WHERE...Lyon, O'Brien, Osceola, and Sioux Counties.
* WHEN...Until noon CST today.
* IMPACTS...Low visibility could make driving conditions hazardous.
* ADDITIONAL DETAILS...Fog has been highly variable and moving around the region this morning. Be prepared for quickly changing conditions, as visibility may drop significantly in a few minutes.
* AFFECTED AREAS: LYON ... OSCEOLA ... SIOUX ... O'BRIEN
Instructions:
If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Address/Location
Sioux County Sheriff's Office
4363 Ironwood Ave., Ste 1
Orange City, IA 51250
Contact
Emergency: 9-1-1
Non-emergencies: 712-737-3307