Late Freeze-up of Koyuk River

Observation: The Koyuk River froze solid by October 14th and broke apart after warm weather on October 28th. A week later open water is still visible.

LEO Says This observation has been added to the Alaska River Watch project. November has brought observations of encouraging winter weather and snow from the Bering Strait Region (Unalakleet) but also unseasonably warm weather in Southeast (Wrangell). See other related observations from years past in the Bering Strait region.

Resource:

National Weather Service, Alaska-Pacific River Forecast Center "is responsible for monitoring ice conditions throughout Alaska to assess flood threats and navigational hazards. Ground observations, aerial reconnaissance, and remote sensing are sources used to assess ice conditions. Source: National Oceanic and Atmospheric Administration (NOAA) Alaska-Pacific RFC

• NOAA NWS Alaska RFC, The River Watch Program is a voluntary program that is... .PDF download.
• NOAA NWS Alaska RFC, River Watch Program FAQ