
10-minute GOES-18 Mid-level Water Vapor images, with 30-minute Peak Wind gusts plotted in cyan/red, from 2100 UTC on 11 October to 2300 UTC on 12 October [click to play MP4 animation]
10-minute Full Disk scan GOES-18 (GOES-West) Mid-level Water Vapor images (above) showed the remnants of Typhoon Halong (North Pacific surface analyses) as it entered the Bering Sea late in the day on 11 October (Alaska surface analyses) and eventually moved inland across far western and northwestern Alaska later in the day on 12 October 2025 (crossing the Seward Peninsula after 1600 UTC, then traversing the far western North Slope after 2100 UTC).
Notable peak wind gusts included 80 kts (92 mph) at St. George (PAPB) in the Bering Sea at 0615 UTC, 75 kts (86 mph) at Cape Newingham (PAEH) along the southwest coast of Alaska at 0915 UTC, 87 kts (100 mph) at Toksook Bay (PAOO) along the southwest coast of Alaska at 1135 UTC and 70 kts (81 mph) at St. Michael (PAMK) farther inland just south of Norton Sound at 1829 UTC (below).

GOES-18 Mid-level Water Vapor image at 0700 UTC on 12 October, with a cursor sample of the St. George (PAPB) METAR showing a Peak Wind gust of 80 kts that occurred at 0615 UTC [click to enlarge]

GOES-18 Mid-level Water Vapor image at 1000 UTC on 12 October, with a cursor sample of the Cape Newingham (PAEH) METAR showing a Peak Wind gust of 75 kts that occurred at 0915 UTC [click to enlarge]

GOES-18 Mid-level Water Vapor image at 1200 UTC on 12 October, with a cursor sample of the Toksook Bay (PAOO) METAR showing a Peak Wind gust of 87 kts that occurred at 1135 UTC [click to enlarge]

GOES-18 Mid-level Water Vapor image at 1900 UTC on 12 October, with a cursor sample of the St. Michael (PAMK) METAR showing a Peak Wind gust of 70 kts that occurred at 1829 UTC [click to enlarge]
A toggle between Suomi-NPP VIIRS Infrared Window and Day/Night Band images at 1424 UTC (below) showed the remnants of Typhoon Halong as it was centered over Norton Sound, south of the Seward Peninsula.

Suomi-NPP VIIRS Infrared Window and Day/Night Band images at 1424 UTC on 12 October, with plots of Peak Wind Gusts plotted in cyan/red [click to enlarge]
A distinct mid-tropospheric dry slot (shades of yellow) was evident on GOES-18 Water Vapor imagery as it progressed northeast over the Bering Sea (0400 UTC image) — the downward transfer of momentum was likely a factor in producing some of the stronger wind gusts at the surface, as was suggested by a plot of rawinsonde data at Nome PAOM (located on the southern coast of the Seward Peninsula).
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