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Marine Weather and Tides
Version 3.4 |
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported. 5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive. 5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds. |
| Sunrise 6:48AM | Sunset 6:50PM | Sunday September 24, 2017 4:18 AM AKDT (12:18 UTC) | Moonrise 11:52AM | Moonset 9:03PM | Illumination 15% |  |
Marine Forecasts
EDIT (on/off) Help| PKZ033 Southern Chatham Strait- 405 Am Akdt Sun Sep 24 2017 Today..S wind 15 kt. Seas 3 ft, except 6 ft near ocean entrances. Tonight..Light winds becoming ne 10 kt late. Seas 2 ft or less then 2 ft late. NEar ocean entrances, seas 6 ft. Patchy fog in the evening, then areas of fog with visibility 1 nm or less late. Mon..N wind 10 kt. Seas 2 ft or less, except 6 ft near ocean entrances. Areas of fog with visibility 1 nm or less in the morning. Mon night..S wind 10 kt. Seas 2 ft or less. Rain. Tue..SE wind 15 kt. Seas 3 ft. Wed..SE wind 20 kt. Seas 4 ft. Thu..S wind 15 kt. Seas 3 ft. |
7 Day Forecast for Marine Location Near Port Alexander, AK
Hourly EDIT Helplocation: 56.17, -134.67 debug
Area Discussion for -
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxak67 pajk 232318 afdajk southeast alaska forecast discussion national weather service juneau ak 318 pm akdt Sat sep 23 2017 Synopsis A front will move in off the gulf and spread heavy rain across portions of the panhandle through Saturday night. Another low will cross over the southern panhandle on Sunday night. Short term Saturday evening through Sunday night ... Satellite imagery is indicating a front located over the central gulf. Deformation in the frontal cloud shield is also indicating the development of what appears to be a triple point low west of the southern outer coast. Infrared cloud top temperatures of -60c and satellite based microwave rain rate information are all suggestive of heavy rain in the associated front. Models all support these things elements as well. Lightning was observed late last night and earlier today well to the west over the central gulf, but none has been observed this afternoon. Modeled lifted index and cape not conducive for more lightning this afternoon or tonight. Still, very cold cloud tops warrant caution. And so, have opted to retain a slight chance of thunderstorms over the eastern gulf in marine zone 310. Showers already have, or will soon, transitioned to rain with no break in precipitation. Rain will be heavy at times, particularly over the southern half of the panhandle. 36 hour forecast storm totals ranging from around 1 2 inch to more than 2 inches with the heaviest amounts over the southern inner channels. Some models are suggesting that even more precipitation is possible. As such, this represents the most critical element of the afternoon forecast and there will be responses from area creeks and streams. No flooding is expected at this time, as this front will move through fairly quickly. Look for updates from this office as this event unfolds. Winds associate with this front will be limited to small craft intensity. Have small craft advisories for portions of the outer coast as well as cross sound, clarence strait, and northern lynn canal. Winds will increase and become gusty from south to north and from outside to inside as the front moves onshore beginning late this evening over the southern inner channels, late tonight over the central inner channels, and finally tomorrow morning from the icy strait corridor and northward. Post frontal winds and gusts will be less. A few tweaks to winds to highlight gusty conditions associate with the front's progress north. Updated pop and QPF using some of the nam, GFS and SREF to capture the details associated with the deformation associated with the developing triple point. Otherwise, no significant changes made to the previous forecast. |
Overall forecast confidence is average. Long term Monday through Saturday... An upper level shortwave, developing from a parent circulation with its center positioned near the aleutians, will propagate across the northeastern gulf and lift across the panhandle Sunday night into early Monday morning. A subtropical jet feature will assist with advecting additional moisture with this system, but most of the precipitation increases will primarily be confined to the more southern portions of the panhandle. A ridge of high pressure will then begin to build over the eastern gulf Monday. We should start to see most locations across the panhandle dry out for the day. Fog development may be a possibility, especially during the morning commute on Monday, so we'll continue to monitor this trend for subsequent forecasts. The ridge should then begin to weaken and retreat east before another shortwave develops and progresses northeast across the gulf, impacting the panhandle on Tuesday. Models continue to show additional subtropical jet setups to assist with pushing additional moisture over the panhandle. This type of pattern appears poised to continue through the remainder of next week, with additional shortwaves that develop out of the parent trough over the gulf. Due to this tropical moisture push over the area, we expect chances of precipitation to remain high through the week and temperatures to maybe be slightly above average, especially in southern areas. For adjustments to the forecast, we updated pops with a blend of the ECMWF and canadian, relying more on the ec, to continue to show the increasing precipitation trend through the week. We also increased winds throughout the eastern gulf waters to account for the tighter pressure gradient that develops with the subsequent shortwaves that progress out of the parent circulation. A lot of uncertainty will then remain regarding the synoptic pattern after about day 8. Aviation Phone line problems in yakutat are preventing the asos obs from being disseminated. Had to nil the TAF there due to deteriorating weather tonight and loss of useful webcam views by sunset 0311z . Continued very low CIGS vsbys across panhandle in our very moist air mass. Wind shear mentioned in southern panhandle tafs overnight tonight with vigorous short wave moving quickly through southern areas overnight. Rain changes to showers during the day Sun with gradual stabilization. Outlook for mon... Possible dense fog impacting TAF sites. Ajk watches warnings advisories Public... None. Marine... Small craft advisory for pkz012-022-036-041-043-052. Small craft advisory due to seas for pkz051. Fritsch voveris visit us at http: |
Weather Reporting Stations
EDIT (on/off) Help NOTE: Click on distance to see the station location on a map| Stations | Dist | Age | Wind | Air Temp | Water Temp | Waves | Pressure | DewPt |
| PLXA2 - 9451054 - Port Alexander, AK | 5 mi | 48 min | Calm G 2.9 | 53°F | 48°F | 1008.3 hPa | ||
| CDEA2 - Cape Decision, AK | 31 mi | 56 min | SW 7 G 11 | |||||
| FFIA2 - Five Finger, AK | 94 mi | 78 min | SSE 22 G 24 | 54°F | 1006.8 hPa (+0.9) |
Wind History for Port Alexander, AK
(wind in knots) EDIT (on/off) Help| 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | |
| Last 24hr | N G8 | N | NW G6 | NW G10 | W | -- | NW | NW | -- | -- | E G4 | S G8 | S G8 | -- | -- | S | -- | E G4 | S G14 | S G17 | S G23 | S G21 | SW G15 | SW G13 |
| 1 day ago | N | NW G5 | N G9 | NW | NW G8 | N G9 | N G8 | N G5 | NW | NW | S | SW | -- | -- | S | E | -- | -- | -- | -- | -- | N | NW | NW |
| 2 days ago | NW | -- | N | -- | -- | -- | -- | -- | NE | NE | -- | N | -- | -- | S | SW | -- | S G5 | S G7 | S G9 | SE G6 | NW | NW |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
Wind History from AAP (wind in knots)
| 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | |
| Last 24hr | NW G20 | N G25 | Calm | |||||||||||||||||||||
| 1 day ago | NE G25 | NE G15 | ||||||||||||||||||||||
| 2 days ago | W | N | Calm | E |
Tide / Current Tables for Cape Ommaney, Baranof Island, Alaska
EDIT RT Ports Option Weekend mode (on/off) (on/off) Help One Week of Data| Cape Ommaney Click for Map Sun -- 03:51 AM AKDT 8.90 feet High Tide Sun -- 06:48 AM AKDT Sunrise Sun -- 09:44 AM AKDT 2.25 feet Low Tide Sun -- 11:51 AM AKDT Moonrise Sun -- 03:45 PM AKDT 9.71 feet High Tide Sun -- 06:51 PM AKDT Sunset Sun -- 09:03 PM AKDT Moonset Sun -- 10:21 PM AKDT 0.76 feet Low Tide Tide / Current data from XTide NOT FOR NAVIGATION |
| 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
| 3 | 5.2 | 7.2 | 8.5 | 8.9 | 8.3 | 6.9 | 5.2 | 3.6 | 2.5 | 2.3 | 3 | 4.5 | 6.4 | 8.2 | 9.4 | 9.7 | 9 | 7.4 | 5.3 | 3.3 | 1.7 | 0.8 | 1 |
Tide / Current Tables for Port Alexander, Baranof Island, Alaska
EDIT (on/off) Help One Week of Data| Port Alexander Click for Map Sun -- 04:02 AM AKDT 10.22 feet High Tide Sun -- 06:48 AM AKDT Sunrise Sun -- 09:46 AM AKDT 2.08 feet Low Tide Sun -- 11:52 AM AKDT Moonrise Sun -- 03:56 PM AKDT 11.05 feet High Tide Sun -- 06:50 PM AKDT Sunset Sun -- 09:02 PM AKDT Moonset Sun -- 10:23 PM AKDT 0.58 feet Low Tide Tide / Current data from XTide NOT FOR NAVIGATION |
| 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
| 3.1 | 5.6 | 7.9 | 9.6 | 10.2 | 9.7 | 8.1 | 5.9 | 3.8 | 2.4 | 2.1 | 2.9 | 4.6 | 6.9 | 9 | 10.5 | 11.1 | 10.4 | 8.6 | 6.2 | 3.7 | 1.7 | 0.7 | 0.8 |
Weather Map and Satellite Images
(on/off) HelpWeather Map | IR Satellite Image from GEOS GOES Local Image of PacificNorthwest EDIT  |
Wind Forecast for (8,2,3,4)
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Ground Weather Radar Station Biorka Is., AK
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Disclaimer: 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 numerious 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. |