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FNAK77 PAJK 241330
FWSAJK

Spot Forecast for Glacier Bay...Coast Guard
National Weather Service Juneau AK
530 AM AKDT Thu Apr 24 2025

Forecast is based on forecast start time of 0600 AKDT on April 24.
If conditions become unrepresentative...contact the National Weather
Service.

Please contact our office at (907) 790-6824, if you have questions
or concerns with this forecast.

.DISCUSSION...

Wind and waves:

Early Thursday morning a low in the central gulf will be
continuing to send frontal bands into the panhandle, with
easterly moderate breezes (11 to 16 knots) through Icy
Strait, and southeasterly moderate breezes (11 to 16 knots)
for the Sitakaday Narrows, just west of Young Island, though
during the early morning hours there is a chance that sustained winds
could occasionally reach as high as fresh breezes (17 to 21 knots),
with gusts reaching strong breeze (22 to 27 kt)as an occluding
front moves across the panhandle.

As the front departs, these winds will rapidly diminish
through the late morning in the Sitakaday
narrows, and by 1300 winds will be hovering around light breeze
(4 to 6 kt), taking on variable directions, although Icy Strait
will continue to maintain easterly moderate breezes
(11 to 16 knots). As the evening arrives, winds strengthen again
as another frontal band moves in, and by 1900 winds in the
Sitakaday narrows will be back out of the southeast and strengthening
to moderate breeze (11 to 16 kt), potentially reaching on occasion
as strong as fresh breezes (17 to 21 kt). Winds will remain
elevated through Friday morning before diminishing Friday
afternoon in the Sitakaday narrows.

Waveheights through much of Thursday morning will remain around
3 ft. By 1300, waveheights in the Sitakaday narrows will have
subsided to 2 ft or less. Waveheights will again increase in the
same area to 3 ft, potentially 4 ft at times, through Thursday
evening, and remain at a similar height through Friday morning.

Precip/Rain:

Rain showers will continue through Thursday and last into
Friday. Current forecast confidence reflects about 0.05
to 0.15 inches every 3 hours into Friday.

Aviation:

Conditions through Thursday will fluctuate between VFR and MVFR
as stronger showers result in ceilings at times racing below 3000 ft.
Some wind shear is possible Thursday morning, though this will
subside by Thursday afternoon in the wake of the front, before
before returning late Thursday night.

.TODAY...

Sky/weather.........Cloudy (95-100 percent). Rain early in the
                    morning, then rain showers.
Chance of pcpn......100 percent.
Max temperature.....Around 46.
Min humidity........84 percent.
Surface winds (kts).East winds up to 15 knots in the morning, becoming
variable in the afternoon. Gusts up to 25 knots
                    in the morning.
Wave height.........3 feet early in the morning,
                    then subsiding to 2 feet in the late morning
                    and afternoon.
Sea surface temp....45 Degrees Fahrenheit.
Rainfall amount.....0.32 inches.

TIME (AKDT)      6 AM      9 AM      NOON      3 PM
Sky (%).........100       100       100       100
Weather cov.....DEFNTE    DEFNTE    DEFNTE    DEFNTE
Weather type....RAIN      RNSHWR    RNSHWR    RNSHWR
Tstm cov........
Chc of pcpn (%).100       100       100       100
Temp............43        43        43        44
RH..............94        96        93        90
SFC wind (kts)..SE 11G21  SE 14G24  SE 10G19  SE 4G10
Wave height (ft)3         3         2         2
SST (F).........45        45        45        45

.TONIGHT...

Sky/weather.........Cloudy (90-100 percent). Rain showers.
Chance of pcpn......100 percent.
Min temperature.....Around 39.
Max humidity........95 percent.
Surface winds (kts).Southeast winds 7 knots increasing to 15 kt.
Gusts up to 25 knots.
Wave height.........2 ft early in the evening building to 3 feet.
Sea surface temp....45 Degrees Fahrenheit.
Rainfall amount.....0.33 inches.

TIME (AKDT)      6 PM      9 PM      MIDNGT    3 AM
Sky (%).........100       100       96        98
Weather cov.....DEFNTE    DEFNTE    DEFNTE    DEFNTE
Weather type....RNSHWR    RNSHWR    RNSHWR    RNSHWR
Tstm cov........
Chc of pcpn (%).100       100       90        100
Temp............43        42        41        40
RH..............88        89        90        90
SFC wind (kts)..SE 7G13   SE 13G23  SE 14G25  SE 15G25
Wave height (ft)2         3         3         3
SST (F).........45        45        45        45

.FRIDAY...

Sky/weather.........Mostly cloudy (80-90 percent). Rain showers in
                    the morning, then rain showers likely early in
                    the afternoon. Chance of rain showers late in
                    the afternoon.
Chance of pcpn......100 percent.
Max temperature.....Around 45.
Min humidity........82 percent.
Surface winds (kts).Southeast winds 8 to 15 knots. Gusts up to 25
                    knots in the morning.
Wave height.........3 feet subsiding to 2 feet.
Sea surface temp....45 Degrees Fahrenheit.
Rainfall amount.....0.29 inches.

TIME (AKDT)      6 AM      9 AM      NOON      3 PM
Sky (%).........90        89        91        85
Weather cov.....DEFNTE    DEFNTE    DEFNTE    LIKELY
Weather type....RNSHWR    RNSHWR    RNSHWR    RNSHWR
Tstm cov........
Chc of pcpn (%).100       90        90        60
Temp............40        42        44        45
RH..............93        95        87        82
SFC wind (kts)..SE 15G25  SE 15G25  SE 10G19  SE 8G16
Wave height (ft)3         3         2         2
SST (F).........45        45        45        45

$$
Forecaster...Spann
Requested by...Lt. Wheeler
Type of request...MARINE
.TAG 2511414.0/AJK
.DELDT 04/24/25
.FormatterVersion 2.0.0
.EMAIL lindsay.m.wheeler@uscg.mil