Fall air has finally arrived in the northeastern United States and may yield the first frost of the season in parts of the region this weekend.
Ash blanketed parts of Costa Rica this week after the Turrialba volcano erupted while flooding overtook parts of the mid-Atlantic and midwestern U.S.
Karl will pass near Bermuda and lead to increased surf at United States' east coast beaches this weekend.
Saturday and Sunday will feel like the first official weekend of fall in the northeastern United States, while frost visits some of the early season cold spots.
Autumn officially arrives on Thursday, Sept. 22, but much cooler air will wait until this weekend to invade the northeastern United States.