Scientific Forecaster Discussion
Northern Alaska forecast discussion
National Weather Service Fairbanks Alaska
634 am akst Tuesday Dec 10 2013
Aloft...a cold trough aloft over the northern interior
will sweep southward across the central and southern parts
of northern Alaska...bringing in a colder airmass. A moderately
deep upper low will develop over the northern Gulf of Alaska by
Wednesday evening...setting up a cold east to northeast flow
pattern over most of northern Alaska.
Surface pressure gradient over northern Alaska south
of the Brooks range will increase this afternoon and
tonight as high pressure builds southward over the
Arctic coast and a low pressure moves northward in
the Gulf of Alaska. This will result in stronger winds
over much of the forecast area south of the Brooks range.
Wind advisories or winter weather advisories have been
issued for summits in zones 219-220-221-222 beginning tonight.
Wind chill to 45 below is expected to develop over the summits
in zones 219-220 tonight as colder air moves southward. Cooling
is also expected over the southern interior...but temperatures
are not expected to be low enough to generate advisory level wind
In zones 206 passes...winds have increased overnight and locally
poor visibility in blowing snow may occur this morning. Winds are
expected to diminish slightly this afternoon...but areas of
blowing snow will likely continue in passes. Wind chill to 45
below is expected tonight as temperatures drop.
Coastal hazard potential days 3 and 4...none.
Wind Advisory for akz221-akz222.
Winter Weather Advisory for akz206-akz219-akz220-akz222-akz224.
Heavy freezing spray warning for pkz210-pkz220-pkz225.
Small Craft Advisory for pkz210-pkz225.
Brisk Wind Advisory for pkz230.
Rf Dec 13