socked in
adj.— «Yes, it sure was a foggy commute this morning. During the morning broadcast, we used the term “socked in” a lot. This is to let you know where the fog is really dense. It does make you wonder what a sock has to do with fog?» —“Where Does The Term “Socked In” Come From?” by Jenni Hogan KIRO-TV (Seattle, Washington) Dec. 1, 2008. (source: Double-Tongued Dictionary)