The article discusses the spring weather in Anvik, Alaska, and provides historic weather data from Weather Spark. The data shows that in April, daily high temperatures rapidly rise from 29 F to 44 F, and daily low temperatures increase from 14 F to 29 F. The article also mentions the National Weather Service Alaska-Pacific RFC, which provides river break up conditions for the state's river systems. The article includes a graph illustrating the Yukon River breakup dates from 1980 to 2017.

Observation: Just spring weather

LEO says: We have added some historic weather data for Anvik, and according to Weather Spark, "At Anvik Airport, the month of April is characterized by very rapidly rising daily high temperatures, with daily highs increasing by 15°F, from 29°F to 44°F over the course of the month, and rarely exceeding 54°F or dropping below 14°F. Daily low temperatures increase by 15°F, from 14°F to 29°F, rarely falling below -5°F or exceeding 38°F. This report illustrates the typical weather in Anvik year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016." Source: Weather Spark - Beautiful Weather Graphs

Resources:

National Weather Service Alaska-Pacific RFC – Provides river break up conditions for the State of Alaska river systems. The graph below provides a illustration of the Yukon River breakup dates starting 1980 up to present day, 2017. The highlighted marks in blue and red dots for 2017 on the graph represent communities along the Yukon River, that correspond to when the river breakup was cataloged and dated. Source: NOAA NWS, APRFC River View