Dense Fog Advisory

FROM: NWS Pittsburgh PA
AREA: Venango; Forest; Butler; Clarion; Jefferson; Armstrong; Indiana; Higher Elevations of Indiana
SENT: 2026-06-21T04:03:00-04:00

Dense Fog Advisory issued June 21 at 4:03AM EDT until June 21 at 8:00AM EDT by NWS Pittsburgh PA

* WHAT…Visibility of one-quarter mile or less in dense fog,
especially in valley locations.

* WHERE…Forest, Jefferson PA, Venango, Armstrong, Butler, Clarion,
Higher Elevations of Indiana, and Indiana Counties.

* WHEN…Until 8 AM EDT this morning.

* IMPACTS…Low visibility could make driving conditions hazardous.

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

Alert Expiration: 2026-06-21T08:00:00-04:00