Here's an article from today's Fargo, ND Forum newspaper:
BISMARCK (AP) — Fog is becoming commonplace in parts of North Dakota, and even meteorologists think it's strange.
Fog was reported in Bismarck on 54 of the first 68 days of the year. On 17 days the fog was considered "dense."
The National Weather Service doesn't keep records on fog, but meteorologist Nathan Heinert says officials think this year's fog is unusual.
Heinert says the constant gray curtain hanging over the area is the result of a stagnant air mass and constant melting, which puts moisture in low levels of the atmosphere.
Copyright 2010 The Associated Press.