sea ice advisory for western and arctic alaskan coastal waters
national weather service anchorage alaska
545 pm akdt friday april 20 2012
forecast valid ... wednesday april 25 2012
analysis confidence ... high.
synopsis ... a strong north pacific low will move into the southern
bering sea sunday night and into the gulf of alaska late monday. a
much weaker low will move over the far western bering sea monday
night and dissipate by wednesday.
-arctic ocean-
-beaufort sea-
-chukchi sea-
pkz510 - eastern us arctic offshore-
pkz505 - central us arctic offshore-
pkz500 - western us arctic offshore-
pkz245 - flaxman island to demarcation point-
pkz240 - cape halkett to flaxman island-
pkz235 - point franklin to cape halkett-
pkz230 - cape beaufort to point franklin-
pkz225 - cape thompson to cape beaufort-
pkz220 - wales to cape thompson-
pkz215 - kotzebue sound-
pkz210 - dall point to wales-
pkz200 - norton sound-
pkz180 - southwest alaska waters cape newenham to dall point-
ice covered.
forecast through wednesday ... off shore flow will continue to open
leads along the fast ice south of barrow to the bering strait.
-bering sea-
pkz414 - bering sea offshore east of 171w-
pkz185 - st matthew island waters-
pkz165 - port heiden to cape sarichef-
pkz160 - bristol bay waters cape newenham to port heiden-
the ice edge lies from 30 nm northeast of cold bay to 56n 164. 3w to
55. 6n 165. 5w to 56. 1n 169. 1wto 55. 8n 170. 4w to 55. 8n 171. 5w to 57n
175. 5w to 57. 8n 178. 8w to 58. 8n 175. 8e to 57. 5n 170. 8e to 58. 4n
168. 2e and continues down the coast of kamchatka.
the ice edge is mainly 2 to 7 tenthsnew ... young and first year thin
ice in strips. thicker ice and higher concentrations lie 10 to 20 nm
into the ice in most areas.
... detailed ice edge position...
56n 164w
55. 8n 165w
55. 6n 166w
55. 7n 167w
55. 8n 168w
56n 169w
55. 8n 170w
55. 8n 171w
55. 9n 172w
56. 2n 173w
56. 4n 174w
56. 9n 175w
57. 1n 176w
57n 177w
57. 8n 178w
57. 9n 179w
58n 180
forecast through wednesday ... east of 167w ... northerly flow will
diminish saturday and turn southerlyon sunday. winds will diminish
after monday and become variable by wednesday. the ice edge will move
to the north 15 to 25 nm mainly through monday.
forecast through wednesday ... 167w to 180 ... southerly flow will
develop saturday morning and continue through sunday. strips of ice
along the edge will move 25 to 35 nm to the north by monday.
northerly flow will return late monday and diminish to variable by
wednesday. the ice edge will move south 5 to 15 nm tuesday and
wednesday. the net ice movement will be to the north 20 to 30 nm.
forecast through wednesday ... west of 180 ... strong northerly flow will
develop saturday and continue through sunday. flow will diminish
monday becoming variable late tuesday. the ice edge will move to the
south 5 to 15 nm.
pkz140 - cook inlet north of kamishak bay and english bay-
cook inlet analysis confidence ... high.
this is the final cook inlet ice analysis for the 2011/12 ice season.
areas of open water remain in knik arm and at the end of turnagain
arm and will melt over the weekend.
ice from the rivers will enter cook inlet through break up.
Some Cold temperatures causing shelf cracking for berg development -
anaktuvuk no report -0 77 n5 29. 75 -10 10
barrow mostlycldy 1 83 e10 30. 11 -15 10
deadhorse snow 6 87 ne15 30. 05 -12 9
kivalina clear 7 91 e5 29. 87 -2 10
nuiqsut clear -5 91 ne9 30. 09 -21 10
point lay cloudy 4 83 calm 29. 99 4 10
wainwright cloudy 7 83 e11 30. 05 -8 10
--
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