Thursday, February20, 2020
Privacy Policy
L-36.com


Marine Weather and Tides
Port Graham, 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 8:25AMSunset 6:01PM Thursday February 20, 2020 1:38 AM AKST (10:38 UTC) Moonrise 7:06AMMoonset 1:34PM Illumination 11% 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
    EDIT      (on/off)   Help
PKZ141 Kachemak Bay- 335 Pm Akst Wed Feb 19 2020
.small craft advisory tonight...
Tonight..SE wind 30 kt diminishing to 15 kt after midnight. Seas 5 ft. Snow.
Thu..Variable wind less than 10 kt. Seas 2 ft. Rain and snow.
Thu night..W wind 20 kt. Seas 6 ft. Freezing spray after midnight. Rain changing to snow after midnight.
Fri and Fri night..W wind 20 kt. Seas 5 ft.
Sat..NW wind 20 kt. Seas 4 ft.
Sun..N wind 15 kt. Seas 3 ft.
Mon..NE wind 25 kt. Seas 5 ft.


7 Day Forecast for Marine Location Near Port Graham, AK
   Hourly   EDIT   Help
location: 59.22, -151.73     debug


Area Discussion for -
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXAK68 PAFC 200159 AFDAFC

Southcentral and Southwest Alaska Forecast Discussion National Weather Service Anchorage AK 459 PM AKST Wed Feb 19 2020

ANALYSIS AND UPPER LEVELS. There is a trough and associated surface low over interior portions of Southcentral moving northward. Showers are diminishing over the area as this system continues to weaken and move further inland. A low centered near the eastern Aleutians is rapidly moving towards the east-northeast. The leading front with this system stretches from Kodiak Island southward, with the occlusion positioned from Kodiak westward to near the Pribilofs. Behind this low over the central and western Bering a surface ridge is building in, with a trough at the upper levels. This is producing north winds and showers in cold advection.

MODEL DISCUSSION. The numerical models are in good agreement through Friday afternoon with the synoptic pattern and timing of various surface features. There are some differences in precipitation, and some specific weather features are difficult to predict in this pattern. Therefore the forecast confidence is near normal.

AVIATION. PANC . VFR conditions and light winds will persist through Thursday morning. LLWS is expected later tonight through Thursday morning as southeast winds aloft increase and flow at the surface becomes light northerly. The LLWS will end around noon, and conditions are expected to drop to MVFR in light snow.

SHORT TERM FORECAST SOUTHCENTRAL ALASKA (Days 1 and 2. Wed night through Fri) .

Areas of light snow continue to linger from the Mat-Su Valleys southeast across the Chugach Mountains to Cordova. This is due to a trough slowly lifting to the northeast. Behind this initial system, a second strong frontal system will lift from Kodiak toward the northern Gulf. This system will bring another round of strong southeasterly gap winds from Portage Valley through Turnagain Arm and the Upper Hillside of Anchorage beginning later this evening. Gusty easterly winds are also expected across the Matanuska Valley. With colder air settling in tonight, areas of blowing snow are likely from Portage to Palmer during the onset of the gusty winds before warmer air begins to work in tomorrow. Blowing snow is also likely overnight tonight into tomorrow for Turnagain Pass and Thompson Pass. A widespread area of mixed wintry precipitation will accompany the front, mainly as snow as the frontal system runs into the colder air. As the front lifts to the coast and temperatures rise, the snow will change to rain along the immediate coast. There may even be a brief rain/snow mix for Anchorage and Palmer as the southeasterly winds aid in additional warming with highs jumping into the mid to upper 30s.

The cross-barrier flow with this system, however, will provide some downsloping along the lee of the Chugach Mountains, limiting precipitation amounts. By tomorrow night, the upper-level trough begins to lift toward Southcentral and the flow turns more southerly aloft. This will not only put an end to the strong winds, but allow for the areal coverage of light snow to increase across the Anchorage Bowl north to the Susitna Valley. Both the frontal and the upper-level trough slow and become nearly stationary late Thursday night into Friday. This will likely allow the light snow to linger across much of Southcentral through the end of the work week. With the exception of the mountains, the highest snow amounts look to be across the northern half of the Susitna Valley, where at least another 6 inches of snow could fall by late Friday. Farther south, 2 to 4 inches of looks to be possible for the Anchorage Bowl and Matanuska Valley through Friday.

SHORT TERM FORECAST SOUTHWEST ALASKA (Days 1 and 2). A front will move into Southwest Alaska overnight bringing in snow and some areas of blowing snow. The most significant snow and blowing snow should be from around Dillingham North and West where 3 to 6 inches of snow are expected with winds gusting 20 to 30 mph. This is expected to drop visibility to around 1/2 mile at times in blowing snow. Snowfall is expected to be lighter in the Kuskokwim Delta toward Bethel as well as north toward the Kuskokwim Valley due to the strongest part of the front being over the Bristol Bay area.

The low associated with this front will move eastward Thursday and Thursday night bringing northwest flow and colder air into Southwest Alaska for the remainder of the week.

SHORT TERM FORECAST BERING SEA/ALEUTIANS (Days 1 and 2). An elongating low is over the Eastern Aleutians through Alaska Peninsula today with a sharp contrast in temperatures across it. The rain which has moved into these regions today will give way to the colder air overnight which will allow snow showers to move into the region. This colder air will remain over the Bering Sea and Aleutians through Friday. The next low that will bring some warmer air will just start to nose into the Central Aleutians Saturday.

MARINE (Days 3 through 5 Sat through Mon). Westerly gale force winds are expected on Saturday in the Gulf, which will weaken on Sunday. A low will move from the western and central Aleutians on Saturday eastward across the eastern Aleutians Sunday and into the Gulf on Monday. Gale force winds are expected with this low. Confidence on the timing of this low is fairly high.

LONG TERM FORECAST (Days 4 through 7 Sun through Wed). On Sunday morning the pattern will consist of an upper level trough over Southcentral Alaska extending south into the Gulf of Alaska, an upper level ridge over the central and eastern Bering Sea, and an upper low over the Aleutians. The trough over Southcentral will slowly slide east, moving into Canada Sunday night. The Bering ridge will then build over southern Alaska Sunday night, sliding slowly eastward through Wednesday when the axis should be in northwest Canada. The Aleutian low will move east and a bit north through Wednesday, undercutting the ridge over southern Alaska.

AFC WATCHES/WARNINGS/ADVISORIES. PUBLIC . NPW 101. WSW 161. MARINE . Storm 119 125. Gales 120 130-132 138 150 155 160 165 172-176 180 351 352 413 414. FIRE WEATHER . NONE.



SYNOPSIS AND MODEL DISCUSSION . BL SOUTHCENTRAL ALASKA . TM SOUTHWEST ALASKA/BERING SEA/ALEUTIANS . EZ MARINE/LONG TERM . BL


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
OVIA2 - 9455500 - Seldovia, AK 15 mi50 min 39°F979.9 hPa
FILA2 - Flat Island Light, AK 16 mi38 min E 30 G 36 35°F 977 hPa (-7.3)35°F
AMAA2 - East Amatuli Light, AK 24 mi38 min S 25 G 26 39°F 977.1 hPa (-6.7)39°F
HMRA2 - Kachemak Bay Reserve, AK 31 mi68 min E 15 32°F 981 hPa32°F
HMSA2 31 mi26 min ENE 12 G 20 33°F 978.4 hPa30°F

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Seldovia, Seldovia Airport, AK15 mi45 minN 05.00 miLight Snow Fog/Mist34°F32°F92%980 hPa

Link to 5 minute data for PASO

Wind History from ASO (wind in knots)
2
AM
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
Last 24hr336S8S6
G18
S7SW7--3S5S3S3S6S75CalmCalmCalmCalmN4435Calm
1 day agoS9S7S7S4CalmCalmCalmCalmCalmSE83CalmCalm5NE5N8N5--N12
G17
N5N6N10
G19
N8N8
2 days agoCalmCalmCalmN3NE54N3N3Calm6S11
G20
4S12
G21
S9
G30
S13
G27
--S13
G23
--S19
G33
S10
G18
SW9
G17
S10
G26
S8S5

Tide / Current Tables for Port Chatham, Cook Inlet, Alaska
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Picnic Harbor, Rocky Bay, Alaska
   EDIT      (on/off)   Help   One Week of Data
Picnic Harbor
Click for Map
Thu -- 12:15 AM AKST     10.49 feet High Tide
Thu -- 05:27 AM AKST     4.52 feet Low Tide
Thu -- 08:04 AM AKST     Moonrise
Thu -- 08:28 AM AKST     Sunrise
Thu -- 11:27 AM AKST     12.67 feet High Tide
Thu -- 02:33 PM AKST     Moonset
Thu -- 06:11 PM AKST     Sunset
Thu -- 06:15 PM AKST     -0.35 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
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
10.510.29.17.45.64.64.75.87.69.711.512.612.511.49.36.43.30.8-0.301.74.16.89.1

Weather Map
       (on/off)   Help Weather Map
wmap_P
GEOS 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
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

Cookie Policy:
This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser.
Privacy Policy:
I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. If you are subject to CCPA, Google ads on this site will not be based on your past behavior so you will likely not see an ad for a lawn mower just because you looked for one at a big box website. I do not believe this site is subject to CCPA but I am doing what I can to follow the guidelines anyway.
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 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.