Tuesday, January21, 2020
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Marine Weather and Tides
Juneau, AK

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 8:21AMSunset 3:56PM Tuesday January 21, 2020 5:59 AM AKST (14:59 UTC) Moonrise 7:05AMMoonset 1:53PM Illumination 13% Phase: Waning Crescent; Moon at 26 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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PKZ032 Northern Chatham Strait- 349 Am Akst Tue Jan 21 2020
Today..NE wind 10 kt. Seas building to 3 ft in the morning, then 2 ft or less in the afternoon. Rain in the afternoon.
Tonight..N wind 10 kt becoming se late. Seas 2 ft or less. Rain.
Wed..SE wind 15 kt. Seas building to 3 ft in the afternoon. Rain.
Wed night..SE wind 15 kt. Seas 3 ft. Rain.
Thu..NE wind 15 kt becoming s. Seas 3 ft.
Fri..SE wind 15 kt. Seas 3 ft.
Sat..SE wind 15 kt becoming ne. Seas 3 ft.


7 Day Forecast for Marine Location Near Juneau, AK
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location: 58.07, -134.64     debug


Area Discussion for -
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FXAK67 PAJK 211446 AFDAJK

Southeast Alaska Forecast Discussion National Weather Service Juneau AK 546 AM AKST Tue Jan 21 2020

SHORT TERM. /Through Wednesday night/ Interactions between northern and southern stream energy aloft will determine where precip will occur over the next couple of days. A northern stream trof will weaken and move NE across the area late this afternoon and evening. Another shortwave in the northern stream will move NE across the area later tonight into Wed. Meanwhile, a southern stream trof will move NE into the central BC Coast by this evening. Some shortwave energy/moisture from this trof will move N into the SE gulf today. A more pronounced shortwave in the southern stream will move NE into the eastern gulf by Wed night. At the sfc, an inverted trof will develop over the eastern gulf, and remain in that area into late tonight, before it begins to drift NW Wed ahead of a low moving into the SE gulf by Wed night.

There were some model differences on precip development, and based on some of the upper level forcing and presence of mid-level frontogenesis, went with a more robust precip forecast across mainly the central and N into Wed. Ptype will be tricky around the Juneau-Elfin Cove corridor, as it will depend on how strong any E-SE wind gets and precip rates, as boundary layer temps will be just a bit above freezing at precip onset in this region. Lighter winds and higher precip rates would mean more snow, while stronger winds and lower precip rates would favor rain. May end up with opposing forces on this, with some low level E-SE wind likely but higher precip rates possible due to some frontogenetic enhancement. At this point, ended up going with rain and snow for much of the Juneau-Elfin Cove corridor through tonight, but had little snow accumulation for most of that area. Could see some snowfall in the Mendenhall Valley and N of Auke Bay around the Juneau area though, especially tonight. Went for up to 2 inches in those areas. Does look like precip will get to most of the far N this afternoon and continue into tonight. This should be snow, and a couple of inches are likely tonight and Wed in Haines and Skagway areas. Eventually, as the inverted trof moves NW, temps will gradually warm across the N half of the area, and precip will become mainly rain in the N-central area Wed. This will continue into Wed night with more precip spreading N ahead of the low moving into the SE gulf.

Over the S, some precip will move N into the area during the day today. Expect it to remain warm enough for mainly rain, but Hyder and some of the colder spots in zone 26 could see a little snow. More significant precip will move into the S Wed afternoon and night ahead of the low moving NE into the SE gulf.

For the most part, winds will not be too strong. There may be some localized spots with 20-25 kt winds across the N early today. Otherwise, winds should remain 20 kt or less, until that low moves NE toward the SE gulf Wed and Wed night. SCA level winds will become likely over the SE gulf by Wed evening.

LONG TERM. /Thursday through Tuesday as of 10 pm Monday/ Split flow can be an intimidating animal to tame for any meteorologist, and models have difficulty as well. Wednesday night and Thursday we find ourselves in just such a scenario. A strong short-wave amidst southerly flow in the North Pacific by all accounts should lift a low northward into the eastern gulf. This could bring gale- force winds to the eastern gulf waters, but confidence is low to broadcast this for any one time/place with any precision. At the same time, a much colder jet dropping south into the western gulf will begin developing a low well to our west. Due to differences in strength and track of the low moving into the eastern gulf, differences exist in how the western gulf energy phases with the low on our side. And likewise, how quickly any cold air wraps eastward into Southeast Alaska: whether Friday morning as the ECMWF or Friday evening according to the GFS. To add to uncertainty, the southern jet's activity persists into the weekend, likely luring new storms northward into Southeast.

While hints mount that some colder air re-enters the Inner Channels, the lack of incubation time and implied over-water trajectory encourages us to keep temperatures on the milder side supporting rain/snow across the central Panhandle with snow for the far north, and rain for the south for much of the mid-range. But at times, solutions are keeping thickness values fairly low with phasing of north and south jet energy, implying overrunning precipitation across the northern half. So significant snow accumulations at times are not out of the question for the north- central Panhandle. However, snow likely remains bottled up within Upper Lynn Canal.

Looking Sunday and beyond, active weather continues, but confidence falls rapidly through the weekend with specific features. Rain-snow is a good bit for the north with rain for the south.

Confidence in the extended range remains poor to medium with the highest certainty, higher precipitation chances.

AJK Watches/Warnings/Advisories. PUBLIC . None. MARINE . Small Craft Advisory for PKZ041-042.



RWT/JWA

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SCXA2 9 mi27 min S 1.9 G 1.9 34°F 996 hPa34°F
AJXA2 20 mi28 min NW 8.9 G 13 31°F 998.1 hPa26°F
JLXA2 20 mi27 min SW 2.9 G 8 31°F 997.5 hPa27°F
JMLA2 20 mi28 min W 12 G 17 31°F 998 hPa30°F
JNEA2 - 9452210 - Juneau, AK 20 mi60 min WNW 1.9 G 4.1 32°F 38°F999.2 hPa (-3.0)
MVXA2 20 mi28 min NE 2.9 G 5.1 31°F 998.8 hPa26°F
MXXA2 20 mi28 min W 5.1 G 9.9 32°F 996 hPa30°F
SDIA2 - South Douglas, AK 20 mi34 min NNW 7 G 7 34°F 998 hPa34°F
NKXA2 21 mi27 min NE 15 G 20 35°F 997.1 hPa34°F
RIXA2 23 mi27 min N 24 G 29 36°F 995.5 hPa35°F
PAXA2 25 mi27 min NNE 19 G 30 28°F 996.4 hPa24°F
PBPA2 - Point Bishop, AK 28 mi50 min NNE 12 G 21 31°F 998.9 hPa24°F
PRTA2 - Point Retreat, AK 29 mi50 min N 12 G 19 35°F 999.6 hPa34°F
SISA2 - Sisters Island, AK 34 mi38 min NNW 7 G 9.9 37°F
TKEA2 - Tenakee Springs, AK 37 mi28 min E 5.1 G 6 32°F 997.1 hPa28°F
LIXA2 39 mi28 min NNW 18 G 22 35°F 997 hPa34°F

Wind History for Juneau, AK
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Juneau, Juneau International Airport, AK22 mi67 minN 02.00 miFog/Mist35°F28°F78%999.4 hPa

Link to 5 minute data for PAJN

Wind History from AJN (wind in knots)
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Last 24hrCalmE3CalmCalmE3CalmW3E12W5E15
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1 day agoCalmCalmCalmSW5NE3CalmCalmE4CalmCalmCalmCalmCalmCalmE3CalmCalmE4CalmCalmCalmCalmCalmCalm
2 days agoCalmCalmSW33CalmW4S43W3--CalmN3SE10SE12
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Tide / Current Tables for Hawk Inlet Entrance, Alaska
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Fritz Cove, Douglas Island, Alaska
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Fritz Cove
Click for Map
Tue -- 04:11 AM AKST     4.46 feet Low Tide
Tue -- 06:06 AM AKST     Moonrise
Tue -- 08:25 AM AKST     Sunrise
Tue -- 10:16 AM AKST     16.34 feet High Tide
Tue -- 12:51 PM AKST     Moonset
Tue -- 03:54 PM AKST     Sunset
Tue -- 05:08 PM AKST     -0.75 feet Low Tide
Tue -- 11:36 PM AKST     13.93 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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11.99.87.45.44.556.99.712.715.116.315.914.110.973.20.4-0.7-02.35.5911.913.6

Weather Map
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wmap_P
GEOS Local Image of PacificNorthwest    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (9,2,3,4)
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Ground Weather Radar Station Biorka Is., AK
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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.