Scientific Forecaster Discussion
Northern Alaska forecast discussion
National Weather Service Fairbanks Alaska
542 am akdt Tuesday Sep 16 2014
Aloft, broad low dominates eastern Bering Sea and western Alaska.
At lower levels occluded front across northern interior Alaska to
Yukon territory of Canada. This translates into isolated rain
showers...except greater chances along occluded front with a
possible thunderstorm or two. The broad low aloft will change to a
centrally located low over the northern Gulf of Alaska by Thursday
afternoon. Ridging will build from Canada west into the interior
and also from the central Bering Sea north over Russia to the
southern Chukchi Sea. Surface low will deepen under the upper
level low over the northern Gulf of Alaska. High pressure will
build over the high Arctic. This will mean dry weather for the
interior and increasing north winds for the south Chukchi Sea
through the Bering Strait to Saint Lawrence Island. Also...Alaska
Range winds through passes will increase Wednesday and continue
Wednesday night. Low rh's and winds through passes Wednesday
afternoon and evening will be of concern for fire weather
forecasting. Small Craft Advisory winds will develop over most
marine areas Wednesday night and Thursday...then begin to let up
Saturday as pressure gradients weaken. In the shorter term...
small craft advisories from Cape Halkett to Demarcation Point will
end by this evening.
In the extended period...low over high Arctic with trough axis
extending southwest will move south Sunday through early next week
to bring colder temperatures...with coldest temperatures over the
North Slope...Brooks range...West Coast...and western interior.
Coastal hazard potential days 3 and 4...none
Small Craft Advisory for pkz245.
Small Craft Advisory for hazardous seas for pkz235-pkz240.
Da Sep 14