🟡 Moderate

Dense Fog Advisory

Harding; Northern Perkins; Butte; Southern Perkins; Northern Campbell; Western Crook; Wyoming Black Hills; Northeastern Crook

Dense Fog Advisory issued October 31 at 9:05PM MDT until November 1 at 12:00PM MST by NWS Rapid City SD

Alert Description

* WHAT...Visibility one quarter mile or less in dense fog will develop. * WHERE...Portions of northwestern South Dakota and northeast and the Black Hills of Wyoming. * WHEN...Until noon MST Sunday. * IMPACTS...Low visibility could make driving conditions hazardous.

Safety Instructions

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

Time Information

Effective

Nov 1, 2026, 3:05 AM

Expires

Nov 1, 2026, 6:15 PM

Issued

Nov 1, 2026, 3:05 AM

Alert Details

Severity

Moderate

Urgency

Expected

Certainty

Likely

Issued By

NWS Rapid City SD

National Weather Service