The Koyuk River in Alaska froze solid on October 14th but broke apart after warm weather on October 28th, and a week later open water is still visible. This observation has been added to the Alaska River Watch project, which monitors ice conditions throughout Alaska to assess flood threats and navigational hazards. The National Weather Service and Alaska-Pacific River Forecast Center are responsible for this monitoring, using ground observations, aerial reconnaissance, and remote sensing. The River Watch Program is a voluntary program that aims to provide information on ice conditions to the public. November has brought observations of encouraging winter weather and snow from the Bering Strait Region Unalakleet, but also unseasonably warm weather in Southeast Wrangell.

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