textproduct: Anchorage

This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.

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

A broad longwave trough extends from the Chukchi Sea to the North Pacific. Ridging extends from the eastern Gulf into Canadian BC and Yukon. A weaker ridge extends from the North Pacific into the southern Bering. Several shortwave bands of precipitation will stream north into Southwest and Southcentral Alaska through the day on Monday. As the trough shifts eastward models diverge greatly on the track of the upper level low at the terminus of the trough, south of the Alaska Peninsula. The GFS takes the low into the northern Gulf and inland, the ECMWF takes an easterly track but remaining south of the Gulf, and the Canadian-NH creates a cutoff low in the North Pacific south of the Aleutians. Consensus is better out west, where a surface low from eastern Russia pushes a front across the Bering Sea Tuesday into Wednesday. Widespread, light to moderate rain is expected for the Bering Sea and the western half of Alaska. By Thursday morning the low turns north across Saint Lawrence Island.

AVIATION

PANC...VFR conditions to persist through the period. Turnagain Arm winds are expected at the terminal Friday afternoon through Saturday morning with southerly gusts around 20 kts.


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