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Marine Weather and Tides
Version 3.4 |
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports. 6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen |
| Sunrise 6:29AM | Sunset 9:34PM | Saturday August 24, 2019 3:43 AM AKDT (11:43 UTC) | Moonrise 10:41PM | Moonset 3:45PM | Illumination 36% |  |
PKZ141 Kachemak Bay- 304 Pm Akdt Fri Aug 23 2019
Tonight..S wind 10 kt in the evening becoming variable less than 10 kt. Seas 2 ft. Areas of smoke.
Sat..Variable wind less than 10 kt becoming W 10 kt in the afternoon. Seas 2 ft. Areas of smoke.
Sat night..SW wind 15 kt in the evening becoming variable less than 10 kt. Seas 2 ft. Areas of smoke.
Sun..S wind 10 kt. Seas 2 ft.
Sun night..S wind 15 kt. Seas 4 ft.
Mon..Variable wind less than 10 kt. Seas 2 ft.
Tue through Wed..Variable wind less than 10 kt. Seas 2 ft.
Tonight..S wind 10 kt in the evening becoming variable less than 10 kt. Seas 2 ft. Areas of smoke.
Sat..Variable wind less than 10 kt becoming W 10 kt in the afternoon. Seas 2 ft. Areas of smoke.
Sat night..SW wind 15 kt in the evening becoming variable less than 10 kt. Seas 2 ft. Areas of smoke.
Sun..S wind 10 kt. Seas 2 ft.
Sun night..S wind 15 kt. Seas 4 ft.
Mon..Variable wind less than 10 kt. Seas 2 ft.
Tue through Wed..Variable wind less than 10 kt. Seas 2 ft.
7 Day Forecast for Marine Location Near Seldovia city, AK
Hourly EDIT Helplocation: 59.45, -151.72 debug
Area Discussion for -
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxak68 pafc 240103 aaa afdafc southcentral and southwest alaska forecast discussion... Updated national weather service anchorage ak 503 pm akdt Fri aug 23 2019 Analysis and upper levels The main upper level low is centered in the canadian arctic with a secondary low center dropping southward over the bering sea. The upper level trough between these two lows is moving over southwest mainland and southcentral alaska today. As this wave passes it will turn upper level flow to the northwest over the region. The north pacific jet remains to the south of these lows as it runs from west-to-east just south of the alaska peninsula and gulf of alaska. Model discussion Models remain in good agreement through the weekend. The upper level wave dropping out of the kuskokwim valley and bristol bay today looks to be less impressive than models were indicating yesterday. Aviation Panc... Smoke should lessen this evening as winds from the northwest increase a little and bring somewhat less smoky air into the terminal area. Potential for MVFR visibilities from smoke remain, but should be overall improved from today. Fire weather The main factor impacting fires the next day or so will be winds. Winds will turn to the northwest this afternoon and increase some this evening. This will bring in drier air as well. We are not expecting anything close to what occurred with winds and low rh values last weekend, but more like gusts in the 10 to 15 mph range. Short term forecast southcentral alaska (days 1 through 3) A broad upper trough has moved into southcentral and triggered isolated showers this afternoon which will linger into the evening. There are multiple vorticity lobes embedded in this trough and the expectation is that convection will percolate again tomorrow afternoon. The antecedent airmass was parched so it will be difficult the saturate the boundary layer. Some areas will see little more than virga and significant precipitation accumulations are not expected with this weak upper level system. Unfortunately, there will not be enough precipitation to abate the smoke situation. The models do bring a new low over kodiak on Sunday. At this time, the current thinking is that the precipitation will be confined to kodiak, the gulf of alaska, the kenai mountains and chugach mountains. Those mountains will block moisture from reaching the western kenai peninsula and the anchorage metro area. Short term forecast southwest alaska (days 1 through 3) A shortwave moving north to south through southwest alaska is bringing instability to the area. This is resulting in showers from the middle kuskokwim valley through bristol bay. There is enough instability for isolated thunderstorms to form in this same corridor. After the shortwave pushes through this evening, |
chances of rain will diminish throughout southwest alaska as high pressure starts to build in from the west. This setup will also lead to light winds. The light winds and dry conditions will last through the weekend and into Monday. Short term forecast bering sea aleutians (days 1 through 3) High pressure to the west of the western aleutians will slowly move east across the bering through the weekend and into Monday. East of the ridge axis will see northerly winds which will help bring light rain to the bering side of the aleutians. The best chance for rain will be over the eastern aleutians and alaska peninsula due to an upper level low moving through the flow. This low will make it to the pacific side of the alaska peninsula Saturday night. After the ridge moves into the central bering on Sunday, a front will approach the western aleutians bringing rain back to the islands. This weak front will follow behind the ridge as it tracks east. Marine (days 3 through 5: Monday through Wednesday) There is high confidence that a low forming just south of the alaska peninsula Sunday afternoon will traverse the gulf from west to east, reaching the alaska panhandle by Monday evening. This low will bring easterly small craft winds to the northern gulf coast for Monday. As the low departs to the east, a weak trough will remain over the gulf through midweek. Meanwhile in the bering, a ridge of high pressure moves over the eastern bering Tuesday afternoon, allowing a possible gale force low to approach the western bering Wednesday afternoon. At this time, there is low confidence regarding the strength and track of this bering low. .Long term forecast (days 4 through 7: Tuesday through Friday)... the general long-term pattern includes an elongated upper level trough over the mainland while a ridge builds over the bering. Several shortwaves will propagate across the southern mainland bringing mostly unsettled, showery conditions through the middle of next week. One key feature that model solutions have locked onto is a low entering the western bering Wednesday afternoon and strengthening as it progresses eastward through the end of the week. If this pans out, the ridge will be suppressed and a pretty significant pattern change would be underway, bringing more fall- like conditions to the southern mainland by the first weekend of september. Afc watches warnings advisories Public... Dense smoke advisory: 121 125. Flood advisory: 121 125. Fire weather... None. Synopsis and model discussion... Ez southcentral alaska... Pjs southwest alaska bering sea aleutians... Dk marine long term... Ko |
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 |
| OVIA2 - 9455500 - Seldovia, AK | 1 mi | 61 min | 51°F | 1002.5 hPa | ||||
| 46108 - Central Cook Inlet - 175 | 12 mi | 43 min | 54°F | 2 ft | ||||
| FILA2 - Flat Island Light, AK | 17 mi | 43 min | S 4.1 G 6 | 58°F | 1003.3 hPa (+1.0) | 50°F | ||
| HMRA2 - Kachemak Bay Reserve, AK | 19 mi | 73 min | E 6 | 52°F | 1001 hPa | 49°F | ||
| HMSA2 | 19 mi | 31 min | ENE 7 G 9.9 | 51°F | 1002.4 hPa | 45°F | ||
| APXA2 | 23 mi | 118 min | ESE 5.1 | 49°F | 1002 hPa | 44°F | ||
| AMAA2 - East Amatuli Light, AK | 39 mi | 43 min | NNW 9.9 G 18 | 61°F | 1003.3 hPa (+0.8) | 46°F |
Wind History for Nikiski, AK
(wind in knots) EDIT (on/off) Help| 3 AM | 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 | |
| Last 24hr | S G8 | SW G13 | S G11 | S | S | S G8 | S | S | SW | SW | SW | SW | SW | SW | SW | SW | S | SW | S | S | S | E | NE G7 | E |
| 1 day ago | SE | SE | E | SE | E | E | NE | NE | N G14 | N G14 | N | N | N | N | N | N | N | NE G7 | NE | E | NW | W | SW | S |
| 2 days ago | SW | S | S | S | S G11 | SW | SW | S | S | SW | SW | W | NW | W | W | SW | SW | SE | E | SW | S | E |
Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports. Follow links for more data.| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
| Seldovia, Seldovia Airport, AK | 1 mi | 50 min | SSW 3 | 10.00 mi | Fair | 48°F | 43°F | 83% | 1002.9 hPa |
| Homer, Homer Airport, AK | 18 mi | 50 min | NNE 3 | 10.00 mi | Fair | 45°F | 44°F | 97% | 1003 hPa |
Link to 5 minute data for PAHO
Wind History from AHO (wind in knots)
| 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 | NE | NE | NE | E | E | SE | SW | SW | SW | W | SW G20 | NE | NE | N | Calm | NE | ||||||||
| 1 day ago | NE | NE | N | E | E | Calm | S | SW | SW | SW | Calm | NE | ||||||||||||
| 2 days ago | Calm | NE | NE | NE | E | E | E | E | SW | W | W | SW | SW | Calm |
Tide / Current Tables for Port Chatham, Cook Inlet, Alaska
EDIT Weekend mode (on/off) (on/off) Help One Week of DataTide / Current data from XTide NOT FOR NAVIGATION
Tide / Current Tables for Homer, Kachemak Bay, Cook Inlet, Alaska
EDIT (on/off) Help One Week of DataTide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images
(on/off) HelpWeather Map
GOES Local Image of Alaska 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
Ground Weather Radar Station Kenai, 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. |