Moss in a Pittsburgh front yard, 8 Jan 2026 (photo by Kate St. John)

10 January 2026

Lots of yo-yo weather in the past two weeks!

• 7 days above freezing starting Christmas Eve: Highest was 64°F
• 6 days below freezing at the New Year: Lowest was 10°F
• Another spate above freezing this week: : Highest was 66°F.

The plants may be shocked by this up and down weather but some low-lying moss (above) was as green as Ireland on Thursday before the next cold snap.

Meanwhile, beautiful altocumulus undulatus clouds at 3pm on Thursday 8 January made waves in the sky. This type of cloud can predict rain within the next 20 hours and indeed it started to rain on Friday just before 9:00am.

Waves in the sky over Pittsburgh, 8 Jan 2026 (photo by Kate St. John)

Yo-yo weather keeps the streams open and running. This brook at Bowers, PA made happy sounds as it ran with snowmelt.