Dense Fog Advisory issued September 17 at 5:17AM CDT until September 17 at 11:00AM CDT by NWS Sioux Falls SD

**Dense Fog Advisory issued September 17 at 5:17AM CDT until September 17 at 11:00AM CDT by NWS Sioux Falls SD**

* WHAT...Visibility less than one quarter mile or less in dense fog.

* WHERE...Buena Vista, Cherokee, and Ida Counties.

* WHEN...Until 11 AM CDT this morning.

* IMPACTS...Low visibility could make driving conditions hazardous.

**What You Should Do:**

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

**Alert Details:**

- **Severity:** Moderate

- **Urgency:** Expected

- **Issued by:** NWS Sioux Falls SD

- **Effective:** Sep 17, 2026 5:17 AM UTC

- **Expires:** Sep 17, 2026 11:00 AM UTC

*This alert was automatically distributed from the National Weather Service via the IPAWS All-Hazards Information Feed.*