Monday, August19, 2019 L-36.com


Marine Weather and Tides
Hope, AK

Version 3.4
NOTICE
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 6:16AMSunset 9:49PM Monday August 19, 2019 7:58 PM AKDT (03:58 UTC) Moonrise 10:05PMMoonset 10:06AM Illumination 79% Phase: Waning Gibbous; Moon at 19 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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PKZ129 Passage Canal- 319 Pm Akdt Mon Aug 19 2019
Tonight..E wind 10 kt increasing to 15 kt after midnight. Seas 2 ft.
Tue..E wind 10 kt becoming W in the afternoon. Seas 2 ft.
Tue night..Variable wind less than 10 kt. Seas 2 ft. Areas of smoke.
Wed..Variable wind 10 kt. Seas 2 ft.
Wed night..E wind 20 kt. Seas 3 ft.
Thu..E wind 20 kt. Seas 3 ft.
Fri..W wind 15 kt. Seas 2 ft.
Sat..E wind 15 kt. Seas 2 ft.


7 Day Forecast for Marine Location Near Hope, AK
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location: 61.15, -149.76     debug


Area Discussion for -
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Fxak68 pafc 200023
afdafc
southcentral and southwest alaska forecast discussion
national weather service anchorage ak
423 pm akdt Mon aug 19 2019

Analysis and upper levels
The weakening omega blocking pattern continues with a ridge
sitting over the east central bering sea with troughing over the
mainland and also over the northwest pacific. Unstable air,
associated with an upper short wave which moved south across the
mainland Sunday, produced an area of thunderstorm over the
southern gulf of alaska this afternoon. Another less potent upper
wave and associated surface front is moving south across western
alaska. Rain with this system was spreading south across the
delta. Visible satellite imagery shows a fairly extensive band of
smoke, generally associated with the swan lake fire, extending
from the anchorage bowl to kodiak island. Otherwise, generally
fair skies with cooler temperatures and relatively light winds
extended across southcentral.

Model discussion
Models overall are in good synoptic agreement. However,
differences on the handling of the low complex moving into the
gulf Thursday does differ a little. That said, differences do not
produce a significant variation in the wind or precipitation
patterns.

Aviation
Panc... MVFR to possibly ifr ceiling visibilities in smoke are
expected this afternoon evening. Ifr ceilings and visibilities in
smoke likely will settle in by midnight. Ceilings and visibilities
are expected to improve Tuesday afternoon, but confidence in
forecasting the exact conditions is not high. Light winds will
prevail.

Short term forecast southcentral alaska (days 1 through 3)
Winds are finally starting to relax as the shortwave responsible
continues to weaken as it moves farther south across the central
gulf. This weakening flow, however, has allowed smoke from
wildfires across the kenai peninsula and susitna valley to build
across the region, reducing visibility and air quality from the
northern reaches of kodiak island north to talkeetna. As winds
aloft turn more southerly tonight, the smoke around kodiak island
will track north and diminish. Farther north, the southerly flow,
coupled with a weak turnagain arm wind and developing overnight
inversion will keep smoke trapped over the anchorage bowl, where
visibilities may drop as low as one mile. Smoke will linger across
these same regions through Wednesday as the flow remains weak and
a heights aloft build. A front does move into the western gulf on
Tuesday with a chance of light rain for kodiak island. Areas of
light rain will push north toward the southcentral coast by late
Wednesday. Unfortunately, little, if any, of this rain is expected
to push inland and make much difference for the affected fire
areas.

Fire weather (southcentral)
Very dry conditions will continue across all of southcentral
through midweek. Minimum rh values will range from 25% to 35%
across valley locations, including areas near active fires.

Surface winds are diminishing this evening and will become light
and variable, and should become more of a diurnal slope terrain
driven wind through midweek. The exceptions to this will be along
turnagain arm and the knik river valley where a light SE wind is
expected to kick in this evening and linger through early morning
Tuesday. Overnight temperatures will drop into the mid 30s to
lower 40s with the coldest air over the copper river basin. This
will help some with overnight rh recoveries. A weak frontal system
will approach kodiak island by Tuesday with precipitation moving
toward the coast by late Wednesday. However, little if any
precipitation is expected to advance inland. Any diurnal shower
activity Tuesday and Wednesday afternoon will be very limited and
mostly confined to terrain.

Short term forecast southwest alaska (days 1 through 3)
High pressure in the bering will continue to shift to the west,
as a shortwave near the bering strait dives southward tonight.

This disturbance will bring cooler conditions and a chance for
precipitation tonight and tomorrow for the kuskokwim delta then
reaching the bristol bay area by Tuesday.

Short term forecast bering sea aleutians (days 1 through 3)
There is a mature low with an occluded front south of the western
aleutians. The latest ascat (advanced scatterometer) data has
pinged into gale force winds associated with this low. The models
bring this low north towards amchitka and a triple point low
develops near dutch harbor early Wednesday. Expect gusty winds,
rough seas and precipitation with this storm from shemya to sand
point and into the western and central bering this forecast
period.

Fire weather (southwest)
On viirs imagery, there is a fire west of levelock and another
fire west of port alsworth. In the past 24 hrs the minimum rh
values across SW ak have ranged from 25-50 percent. There is an
upper level disturbance that is moving across western alaska that
will dive south bringing clouds and showers to the region. Some
locations may just get a trace although places like toksook and
kipnuk can anticipate a wetting rain.

Marine (days 3 through 5: Thursday through Saturday)
A gale force low centered over the gulf Thursday afternoon tracks
eastward by Friday evening. Behind that low, there is high
confidence that a disturbance forms south of the alaska peninsula
Friday evening, however there is low confidence in the strength
and track of the system at this time. By Saturday afternoon, north
to northwesterly flow will likely create gusty conditions through
the usual gaps and passes along the alaska peninsula. Meanwhile,
a ridge of high pressure remains in place over the western bering
for the weekend.

Long term forecast (days 4 through 7: Friday through Monday)
The main feature in the extended forecast includes an upper level
trough in place over much of the state, translating into
unsettled weather. By early Friday morning, a low in the gulf
continues moving eastward. Behind it, several upper level waves
traverse the southern half of the state, bringing cloudy skies and
precipitation, with northerly flow expected in this pattern.

Meanwhile farther west, a ridge builds over the western bering for
the weekend. Behind the ridge, a north pacific low travels south
of the aleutian chain, approaching the gulf of alaska by late
Monday, though models remain in disagreement on the strength and
timing of this low.

Afc watches warnings advisories
Public... Dense smoke advisory 121.

Marine... Gale warning 177.

Fire weather... None.

Synopsis and model discussion... Rc
southcentral alaska... Tm
southwest alaska bering sea aleutians... Pjs
marine long term... Ko


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ANTA2 - 9455920 - Anchorage, AK 9 mi64 min W 1 G 1.9 59°F 58°F1011.1 hPa
SWLA2 - 9455090- Seward, AK 73 mi64 min 58°F1011.5 hPa
46081 - Western Prince William Sound 83 mi68 min ESE 9.7 G 12 61°F 62°F1012.2 hPa (-1.0)44°F

Wind History for Anchorage, AK
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Anchorage, Merrill Field Airport, AK6 mi2.1 hrsWNW 41.75 miHaze Smoke63°F33°F33%1010.9 hPa
Anchorage, Elmendorf Air Force Base, AK8 mi2 hrsWSW 42.00 miSmoke62°F38°F41%1010.4 hPa
Anchorage, Lake Hood Seaplane Base, AK11 mi2.1 hrsN 01.50 miOvercast with Haze62°F36°F38%1011.4 hPa
Anchorage, Ted Stevens Anchorage International Airport, AK13 mi2.1 hrsN 01.50 miSmoke62°F39°F43%1011 hPa
Birchwood, Birchwood Airport, AK23 mi2 hrsWSW 44.00 miFair with Haze63°F35°F35%1011.8 hPa

Link to 5 minute data for PAMR

Wind History from AMR (wind in knots)
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Last 24hrN11
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E3NE5CalmCalmCalmCalmCalmN5CalmW4NW6NW5NW5W7NW6NW5NW4W3
1 day agoN10
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2 days agoW53CalmNW6
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Tide / Current Tables for Anchorage, Alaska (2) (expired 1999-08-03)
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Anchorage
Click for Map
Mon -- 04:44 AM AKDT     1.79 feet Low Tide
Mon -- 06:18 AM AKDT     Sunrise
Mon -- 10:14 AM AKDT     28.23 feet High Tide
Mon -- 11:07 AM AKDT     Moonset
Mon -- 04:59 PM AKDT     0.76 feet Low Tide
Mon -- 09:46 PM AKDT     Sunset
Mon -- 10:36 PM AKDT     29.18 feet High Tide
Mon -- 11:05 PM AKDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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23.117.612.47.93.62.18.516.422.12628.127.123.117.811.96.83.10.85.21420.825.528.528.9

Tide / Current Tables for Anchorage, Alaska
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Anchorage
Click for Map
Mon -- 04:44 AM AKDT     2.06 feet Low Tide
Mon -- 06:18 AM AKDT     Sunrise
Mon -- 10:14 AM AKDT     28.50 feet High Tide
Mon -- 11:07 AM AKDT     Moonset
Mon -- 04:59 PM AKDT     1.03 feet Low Tide
Mon -- 09:46 PM AKDT     Sunset
Mon -- 10:36 PM AKDT     29.45 feet High Tide
Mon -- 11:05 PM AKDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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23.417.812.78.23.92.48.816.722.426.328.427.423.41812.273.415.514.321.125.828.729.1

Weather Map and Satellite Images
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wmap_P
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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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.