339
FXAK67 PAJK 280534
AFDAJK

Southeast Alaska Forecast Discussion
National Weather Service Juneau AK
934 PM AKDT Wed Aug 27 2025

.UPDATE...Update to the aviation section to include the 06z TAF
issuance.

&&

.SHORT TERM.../ through Thursday night / The ridge of high
pressure along the east. This maintains the dry and warm weather
across the panhandle through Friday. Afternoon and early evening
temperatures pushing limits of the Heat Advisories which are out
for the Prince of Wales, through Ketchikan area, and to Hyder.

Flow around the top the ridge has more clouds and some light rain
to the central gulf coast. Chances for Juneau`s CWA are primarily
west of Yakutat with maybe a 20 PoP for Yakutat itself.

For the inner channels winds generally light, although Sea
breeze is possible that it will develop for the afternoon and
evenings otherwise light winds for the panhandle.


.LONG TERM...
Key Messages:
- High pressure over the gulf continues warm, dry weather
- Chance of rain reaching Yakutat Friday
- Areas of the southern panhandle will see high temperatures
  reach80 through the end of this week

A broad upper level ridge and a resilient surface level high will
keep the panhandle dry and warm through the week, prolonging the
clear skies and heat advisories. Yakutat may experience more cloud
cover and potential for rain as the remnants of a system in the
southwestern interior attempt to push through the northern coast
Friday. Outflow winds will remain light through the central and
southern panhandle Sunday afternoon, when the pressure gradient
begins to tighten and funnel 15 to 20 kt sustained winds out of
Clarence Strait. Icy Strait and Lynn Canal will see stronger
inflow winds due to sea breezing and a tightening pressure
gradient over northern Lynn. Skagway may experience 10 to 15 kts
of southerly winds during the afternoon. Winds will diminish
overnight, allowing for fog to develop in sheltered areas and a
marine layer along the outer coast to push into channel entrances.

850 mb temperatures aloft have continued to increase to 14 to 17
degrees C with areas of 18 degrees C for Thursday and Friday,
allowing for surface temperatures to reach into the 70s for most
of the panhandle. Temperatures in the southern panhandle are
expected to reach near 80 degrees, with inland areas feeling the
warmest of these temperatures as they are not susceptible to sea
breezes. The heat advisory has been updated for communities in the
southern panhandle through Friday. Remnants of an interior
panhandle front look to reach the northern outer coast again over
the weekend, though this system may have enough energy to push
more into the panhandle. Rain accumulations are expected to remain
light, though Yakutat may see heavier totals due to a potential
weak atmospheric river trying to move over the northern coast.
This system at the very least will bring some more cloud cover and
in turn slightly cooler daytime temperatures going into next
week.

An upper level low looks to move up from the southeastern gulf
later next week around Thursday before jumping into the central
gulf. The associated surface inflection could bring precipitation
back to the panhandle if the system is able to become more
organized, though most models keep the weak frontal band away from
the coast of the panhandle.

&&

.AVIATION...VFR flying conditions continue across the panhandle.
Yakutat had some lowered conditions in MVFR but improved to VFR this
evening.

These conditions should continue for most of the panhandle as a high
pressure system remains over the Gulf of Alaska. The exception is
Yakutat where lowered clouds currently in the gulf could slide
northward and give Yakutat MVFR conditions again.

Winds remain below 10 kts for the area but speeds closer to 10 kts
are possible late tonight into tomorrow for some TAF sites.

The other possibility where the VFR forecast could fall apart is
late tonight into tomorrow morning - there is again a chance for
isolated fog development. A strong potential place for fog will be
the Cross Sound to Icy Strait area due to light winds and high
relative humidity. In the southern panhandle, there is a chance
for Klawock and/or the western side of Prince of Wales Island to
see fog development again, but it is not as likely as last night
because of drier conditions.

If fog develops, it will fade out quickly and VFR conditions should
return by midday for most of the panhandle again tomorrow.

&&

.MARINE...

Inner Channels: Light winds are the main pattern through the
inner channels. Locally gusty winds with evening pattern with Sea
breeze items.

Outside Waters: Winds under 20 kt primarily flowing about the
surface ridge, west of Icy Bay winds picking up to 8 to 9 feet in
the southeast winds near Cape Suckling Thursday afternoon.

&&

.FIRE WEATHER...Continued very warm temperatures over 70 degrees
and no rain are continuing to dry out the fine fuels. The dry
weather is expected to continue for an additional week so there is
not chance of moistening the soils and fine fuels. Will be
keeping an eye on the situation, but lower resistance to any
possible spreading of fires is a minor concern.

&&

.AJK WATCHES/WARNINGS/ADVISORIES...
PUBLIC...Heat Advisory until 7 PM AKDT Friday for AKZ328-330>332.
MARINE...Small Craft Advisory for PKZ652-672.

&&

$$

SHORT TERM...Bezenek
LONG TERM...ZTK
AVIATION...GJS
MARINE...Bezenek
HYDROLOGY...Bezenek

Visit us at http://www.weather.gov/Juneau