Scientific Forecaster Discussion
fxak69 pafg 101340
Northern Alaska forecast discussion
National Weather Service Fairbanks Alaska
440 am akst Tue Dec 10 2019
Synopsis...a strong low pressure system will bring strong winds,
snow, blowing snow and freezing rain to Saint Lawrence Island
through Tuesday afternoon. Strong winds and blowing snow along
the North Slope as well today. High pressure will build over
northern Alaska Tuesday through Friday.
an upper level 495 dam low will track northwest and will be just
west of Saint Lawrence Island by Tuesday morning. Southeasterly
flow will continue over much of Alaska through mid week. A 549 dam
high will develop over the eastern North Slope by Tuesday then
persist into Friday.
Surface...a 954 mb low is currently south of St. Lawrence Island.
This low will continue to weaken as it moves to the northwest on
Tuesday and will reach the Gulf of Anadyr Tuesday evening. A ridge
of high pressure will persist into Wednesday in the high Arctic.
North Slope and Brooks range...strong southerly winds will
continue over the Brooks range with areas of low visibility in
blowing snow for the eastern North Slope and Brooks range passes.
Strong easterly winds will continue over the North Slope through
this morning. Blizzard warnings still in effect for zones 203 and
Interior...above normal temperatures are expected across the
interior into Tuesday. Slightly cooler, Wednesday and Thursday. Little
to no precipitation is expected for the interior through through
Thursday thanks to a high amplitude ridge aloft that will dominate
the weather pattern of for much of the week.
West Coast...a 954 mb low is currently south of St. Lawrence
Island early Tuesday morning. This low will continue to weaken as
it moves to the northwest on Tuesday and will reach the Gulf of
Anadyr Tuesday evening. Still seeing strong winds and snow over
Saint Lawrence Island and the Yukon Delta. Winds will slowly
diminish Tuesday afternoon as the low tracks further west. Quieter
weather expected on Wednesday and Thursday.
Coastal hazard potential days 3 and 4...none.
Winter Storm Warning for akz213.
Blizzard Warning for akz203-akz204.
Winter Weather Advisory for akz201-akz202-akz206-akz214.
Small Craft Advisory for pkz230.
Gale Warning for pkz200-pkz210-pkz240-pkz245.
Brisk Wind Advisory for pkz215-pkz220-pkz225-pkz235.