Marine Forecasts

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7 Day Forecast for Marine Location Near Sitka and , AK

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Area Discussion for -

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FXAK67 PAJK 191426 AFDAJK

Southeast Alaska Forecast Discussion National Weather Service Juneau AK 626 AM AKDT Sun Sep 19 2021

SHORT TERM. Satellite imagery and sfc analysis show a weak vort max moving across SE AK bringing isold-sct shra to the panhandle early this morning. Although this feature weakens, persistent onshore flow will maintain schc to low end chc PoPs through Sunday. Focus then shifts to the gale force low the moves through the SW gulf to the N gulf coast through Mon. This will bring a round of gales to the eastern gulf waters late tonight into Mon. Expect SCA winds over most of the inside waters as the front moves through and some gusts to 40-45 mph to western coastal areas of POW. This front also features IVT anomaly values around +3 to +4 with mdt-hvy precip expected for the panhandle into Tue. The heaviest precip amounts look to remain S of the Dixon Entrance into W BC, but total precip amounts from this system of 1.5-3 inches expected through Tue. Given low flow on area rivers and streams, do not expect hydro impacts from this system. Modeled instability indices increase over the NE gulf and adjacent coastal areas Mon night into Tue, so introduced mention of thunder overnight into Tue morning. Inherited forecast represented this well with changes focused on adjusting mass fields to obs, adding mention of thunder and increasing QPF over the S panhandle slightly. Overall forecast confidence remains above average through the period.

LONG TERM. /Tuesday through Saturday night/ . The extended period will be an active, stormy period for SE Alaska and the surrounding waters as a couple of robust low pressure systems move through the Gulf. An upper level low will have moved over the region by Monday and be exiting to the east as an open wave trough Wednesday. Ridging behind the low will quickly move across the panhandle before the next upper level low tracks over the Gulf Thursday, again staying in place for a few days. Although this pattern has above average predictability it continues to have spread within the timing, location and strength.

There will be a rather short period of calmer weather Wednesday into Thursday under the upper level ridge. The late week system expected to track across the Gulf of Alaska with very strong maritime winds (potential to be storm force) and wave threats. More heavy precipitation due to a long fetch of moisture pushing northeastward into Southeast Alaska is also expected. But here model recurrence intervals for QPF showing much larger spread.

AJK WATCHES/WARNINGS/ADVISORIES. PUBLIC . None. MARINE . Gale Warning for PKZ042. Small Craft Advisory for PKZ022-033-036-041-043-051-052.



99/Fritsch

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
SHXA2	2 mi	18 min	E 2.9 G 4.1	48°F			1003.3 hPa	47°F
ITKA2	3 mi	51 min		47°F	55°F		1005.2 hPa (+1.8)
STXA2	5 mi	18 min	Calm G 1.9	48°F			1002.8 hPa	47°F
PGXA2	41 mi	18 min	Calm G 1	50°F				47°F
46084 - Cape Edgecumbe Buoy AK	48 mi	31 min	WNW 5.8 G 9.7	54°F	54°F		1004.6 hPa	51°F
TKEA2 - Tenakee Springs, AK	52 mi	19 min	Calm G 1.9	48°F			1003.5 hPa	47°F
PLXA2 - 9451054 - Port Alexander, AK	67 mi	51 min	Calm G 0	49°F	49°F		1005.2 hPa (+1.7)
ELFA2 - 9452634 - Elfin Cove, AK	94 mi	51 min		50°F	53°F		1005.3 hPa (+1.8)

Wind History for Port Alexander, AK

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N8 G13

N6 G11

N6 G12

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N4 G8

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S1 G4

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SW2 G7

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NE2 G6

N6 G10

N4 G10

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Sitka - Sitka Airport, AK	3 mi	58 min	E 5	10.00 mi	Mostly Cloudy	49°F	45°F	86%	1004.8 hPa

Link to 5 minute data for PASI

Wind History from ASI (wind in knots)

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Calm

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SE15 G22

E12 G22

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E10 G19

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SE13 G20

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SE19 G27

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E6

E12 G20

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Tide / Current Tables for Sitka, Alaska

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Tide / Current Tables for Dog Point, Lisianski Peninsula, Sitka Sound, Alaska

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Weather Map

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