'I think this is a really important wakeup call for Alaska, in the sense that Merbok formed in an area that we just simply don’t ever expect tropical systems to form,' said UAF climatologist Rick Thoman.
September 20, 2022
A screenshot of an aerial view of the incoming September storm that hit Western Alaska. Storm Track from Rick Thoman with UAF ACCAP.over the weekend was the result of several factors all converging to make it so destructive. That’s according to Rick Thoman, a climate scientist at the University of Alaska Fairbanks, who says Tropical Storm Merbok initially formed farther to the east of Japan than one would expect and picked up energy from water that was much warmer than it used to be, based on historical records.
Then, as the upgraded Typhoon Merbok became an “ex-typhoon,” low pressure aloft picked it up and pushed it north into the Bering Sea. And, Thoman says, the orientation of the Jet Stream — a high-altitude band of strong wind — was such that the storm’s edge tracked right along hundreds of miles of Alaska’s coastline, causing severe damage.
Thoman says, as ocean temperatures continue to creep upward, similar, huge, devastating storms hitting Alaska could become more likely.: Without the very warm ocean water, you just don’t get these tropical cyclones. Now, as it moves north over cooler water, it transitions to the “ex” portion of Merbok, or like a typical mid-latitude storm structure. That might sound like just a meteorological technicality.
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