Friday, October 20, 2017

Freeze-Up Progress

Here's a quick update just to make a note of the cold temperatures and rapid onset of freeze-up over the past day or so.  A quick freeze-up at this date is neither surprising nor unusual, but I find it useful to have these dates documented for future reference.

Here's this afternoon's scene on the Chena River in Fairbanks, where the temperature dropped to +3°F this morning.  This is the coldest it's been this early in the season since 2012; but in 1965 the mercury dropped to -15°F on October 20 (and the high was only +3°F on the 21st!)


Sub-zero temperatures were observed in several spots around Fairbanks, including -3°F at Goldstream Creek and a very chilly -10°F near Smith Lake on UAF's North Campus.  The Poker Flat Research Range was even colder at -14°F: not bad for this time of year.

Farther afield, sub-minus 10°F occurred in a number of other remote places, including -17°F at the Jim River HADS and -15°F at the Beaver RAWS.  Unsurprisingly, the Yukon River appears to be frozen over now at Beaver:


Looking west, the Koyuk River is building ice quickly, and over in the Yukon Territory the George Black Ferry was making one of the last runs of the season at Dawson today.





5 comments:

  1. It's time for a Fall season's extratropical typhoon to moderate the temps.

    Gary

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    1. Gary, your reply was prescient: ex-typhoon Lan is helping out. Temperatures are back above normal already and likely to remain so into early November.

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    2. Well good it's about time I was right about something according to my wife. The can happen this time of year (the typhoons).

      Gary

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  2. It looks like we can put a firm hold on freeze up for the next 10 days at least, especially in western Alaska.

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    Replies
    1. Yes indeed. October will end up significantly warmer than normal despite the recent cool-off. Sustained chill has been rare in October in recent years.

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