Marine Weather and Tide Forecast for Port Graham, AK

.SHORT TERM FORECAST SOUTHWEST ALASKA AND BERING SEA/ALEUTIANS (Days 1 through 3)...

Discussion:

The low off the Bristol Bay coast is slowly weakening this afternoon with gusty gap flow winds gradually decreasing through tonight. The low will retrograde slightly back to the west, but still having enough of an influence for lingering scattered showers over portions of the AKPEN and Bristol Bay region. Steady easterly, downslope winds should erode much of the showers as they move towards the Kuskokwim Delta
Meanwhile, back to the west
the other Bering low will weaken into an open wave as it crosses the western Aleutian Islands. The southern-most axis of the trough will quickly drop south into the North Pacific and deepen into a new upper low on Friday. An upper ridge will start to work into the western Aleutians and Bering Sea. The ridge will be fairly transient as it pushes to the southeast through Sunday. A Kamchatka low will race towards the far western Aleutians on Saturday bringing a period of gusty winds Saturday afternoon.

- PP

.LONG TERM FORECAST (Days 4 through 7: Monday through Thursday)...

A broad upper level trough with multiple centers moving through the pattern continues its hold on the Alaska weather picture. The main portion of the low centers over the Bering. A weaker trough extending from a Arctic low moves across the Bering into the Central Mainland, but does not contribute to larger scale weather features. A number of shortwaves ripple across the Aleutians and Alaska Peninsula into the Gulf of Alaska through the forecast period. The GFS and ECMWF maintain decent agreement throughout the large scale but yields uncertainty to the transient details.

Sporadic showers are expected across most of Interior Alaska through the week. A well developed surface low brings areas of moderate rain into the Western Aleutians and Bering beginning Monday. The low center crowds the Aleutians as it moves into the AKPEN through Thursday. Gusty winds move over the Western and Central Aleutians with the low's passage, diminishing late Wednesday as the low moves to the South of Kodiak Island. A second North Pacific low moves moderate to heavy rain into the Western Aleutians and Bering for Thursday.

- Kutz



AVIATION

PANC...VFR conditions will prevail through the TAF period. A Turnagain Arm wind will redevelop late this afternoon, bringing southeasterly winds up to 20 kts to the terminal through the evening hours. Light and variable winds will return to PANC tonight through Friday morning.