FZAK80 PAFC 170005
Sea Ice Advisory for Western and Arctic Alaskan Coastal Waters
National Weather Service Anchorage Alaska
305 PM AKST Friday 16 February 2018
FORECAST VALID...Wednesday 21 February 2018
ANALYSIS CONFIDENCE...High to Moderate
SYNOPSIS...A series of lows will move northward through the Bering
Sea through Wednesday.
PKZ181-North and west of Nunivak Island-
PKZ220-Wales to Cape Thompson-
PKZ225-Cape Thompson to Cape Beaufort-
PKZ230-Cape Beaufort to Point Franklin-
PKZ235-Point Franklin to Cape Halkett-
PKZ240-Cape Halkett to Flaxman Island-
PKZ245-Flaxman Island to Demarcation Point-
PKZ500-Western U.S. Arctic Offshore-
PKZ505-Central U.S. Arctic Offshore-
PKZ510-Eastern U.S. Arctic Offshore-
PKZ180-Kuskokwim Delta and Etolin Strait-
PKZ210-Dall Point to Wales-
The main ice edge in the Bering Sea extends from near 56.6N 159.6W
to 58.3N 157.7W to 58.6N 162.4W to 59.4N 162.7W to 59.8N 167.8W to
62.7N 174.2W to 64.2N 174.2W and continues in Russian waters. The
ice edge is mainly open water.
FORECAST FOR THE BERING SEA (Days 1 through 5)...Generally southerly
winds will persist through Wednesday. The ice edge is expected to
compact northward through Wednesday, with some additional melting
likely. The ice edge is expected to retreat 30 to 50 NM to the north
by Wednesday. Sea ice south of Nunivak Island is expected to
continue to decrease significantly due to wind and wave action as
well as warmer temperatures.
PKZ130-West of Barren Islands Including Kamishak Bay-
PKZ139-Cook Inlet Kalgin Island to Pt. Bede-
PKZ140-Cook Inlet North of Kalgin Island-
SEA ICE EDGE DISCUSSION...The main ice edge within Cook Inlet
extends from 59.9N 151.8W to 59.9N 152W to 59.8N 153W and continues
along the west coast of Cook Inlet to Kamishak Bay. The ice edge is
mainly open water.
FORECAST FOR COOK INLET (Days 1 through 5)...Winds will generally
remain light and variable over the Cook Inlet region through
Wednesday. Daily high temperatures are expected to continue to be
near freezing with overnight lows in the single digits and teens.
Some sea ice within Cook Inlet may melt as air temperatures rise
toward freezing each day, resulting in the ice edge retreating up to
10 NM northward by Wednesday.
Please note...Cook Inlet sea ice changes significantly with the