Wednesday, August23, 2017 L-36.com


Marine Weather and Tides
Point Roberts, WA

Version 3.4
What's New / NOTES
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 6:16AMSunset 8:12PM Wednesday August 23, 2017 1:19 AM PDT (08:19 UTC) Moonrise 7:28AMMoonset 8:23PM Illumination 1% Phase: Waxing Crescent; Moon at 1 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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PZZ133 Northern Inland Waters Including The San Juan Islands- 824 Pm Pdt Tue Aug 22 2017
.small craft advisory in effect until 6 am pdt Wednesday...
Tonight..SW wind 15 to 25 kt. Wind waves 2 to 4 ft.
Wed..S wind 10 to 20 kt. Wind waves 1 to 3 ft.
Wed night..SW wind 15 to 25 kt. Wind waves 2 to 4 ft. A slight chance of showers.
Thu..SW wind 10 to 20 kt becoming S to 10 kt in the afternoon. Wind waves 1 to 3 ft.
Thu night..SW wind 10 to 20 kt. Wind waves 1 to 3 ft.
Fri..SW wind to 10 kt. Wind waves 1 ft or less.
Fri night..SW wind 5 to 15 kt. Wind waves 2 ft or less.
Sat..Light wind becoming W 5 to 15 kt. Wind waves 2 ft or less.
Sun..NW wind 5 to 15 kt becoming sw 15 to 25 kt. Wind waves 2 ft or less building to 2 to 4 ft.
PZZ100 824 Pm Pdt Tue Aug 22 2017
Synopsis for the northern and central washington coastal and inland waters..A decaying frontal system approaching the region tonight will dissipate Wednesday as it reaches the coast. Strong onshore flow will weaken Thursday behind the system. High pressure will remain off the coast with lower pres east of the cascades giving light onshore or northerly flow Friday through the weekend.

7 Day Forecast for Marine Location Near Point Roberts, WA
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location: 48.98, -123.08     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 230419
afdsew
area forecast discussion
national weather service seattle wa
910 pm pdt Tue aug 22 2017

Synopsis Dry and relatively warm weather will continue
tonight. A weak storm system approaching the region on Wednesday
will bring cooler conditions and a chance of showers. Cool weather
with spotty light showers will linger over western washington
Wednesday night and Thursday. Dry and warmer weather will return
Friday through Monday with above normal temperatures expected
especially through the interior.

Short term Onshore gradients have tightened up with uil-bli
hitting +4.1 this last hour and hqm-sea sitting at +2.6. Low clouds
have worked onto the coast and already through the chehalis gap in
the south and into the east strait in the north. This is a bit more
vigorous than what was laid out in the afternoon forecast, have
updated the forecast to reflect more clouds over the interior after
midnight. Stratus will lift late in the morning over the interior
while mid and high level clouds begin to work into the area ahead of
an approaching, albeit weak system. This system will bring showers
along the north coast by late morning then across the olympic
peninsula during the afternoon. Expect a chance of shower through
the remainder of the interior during the evening. Overall this
system is very weak and forecast to fall apart as is moves onshore
with light and spotty precipitation at best. The best bet for
showers remains the coast, north interior and mountains. Light
showers may linger into Thursday morning, especially over the
cascades and in a puget sound convergence zone - if it forms, during
the day Thursday. Expect some clearing with Sun breaks Thursday
afternoon with high temperatures likely rising into the low 70s
across the interior and mid to upper 60s along the coast.

Long term From previous discussion... The upper level trough will
slowly lift into central canada Friday and Saturday leaving the
pacific northwest under a dry, westerly pattern with mostly sunny
skies. Expect high temperatures to gradually warm Saturday and
Sunday into the low to mid 80s over the interior and 70s along the
coast. Upper level heights will rise Monday as the upper level ridge
builds along the west coast into british columbia. This will boost
high temperatures into the upper 80s with a few of the warmer
locations in the southwest interior close to 90. The upper level
ridge will shift east Tuesday with warm and dry conditions
continuing.

Aviation An upper trough will approach the region
through Wednesday, then move across the area Wednesday night and
Thursday. A weak front will dissipate as it reaches the coast
Wednesday afternoon. Light southwest flow aloft. Stable conditions
with increasing low level moisture tonight and Wednesday due to
stronger onshore flow.

Low MVFR or ifr status along the coast is already pushing into the
strait and through the chehalis gap. Onshore gradients suggest
widespread low MVFR CIGS should fill in across the interior by 10-
12z and bit sooner at kolm and kclm. Mixing ahead of the trough
should allow stratus to rise into aVFR stratus deck by around 18z
Wednesday at most spots, except at the coast. Will move up arrival
of status into the ksea kbfi kpae terminals by an hour with the 06z
taf issuance.

Ksea... W-sw wind 5-8 kt, backing to southerly to 5 kt by 12z. There
is high confidence that stratus will move into ksea late tonight,
probably 10z-12z, with ceilings ovc009-015. Stratus should lift to a
vfr deck by 18z and could scatter at times during the afternoon. Dtm

Marine Strong onshore flow will dominate the next couple days as
an approaching trough shifts across the area Thursday. Gale
westerlies are occuring this evening and will persist through much
of tonight. After a lull on Wednesday, westerly gales will likely
develop again in the central east strait Wednesday evening. Winds
will reach small craft strength in waters adjacent to the east
entrance tonight and Wednesday night.

Weaker onshore flow will continue Friday through this weekend, as
high pressure remains off the coast with lower pressure east of the
cascades. Small craft westerlies could develop during the nighttime
hours in the central east strait. Dtm

Sew watches warnings advisories
Wa... None.

Pz... Gale watch from Wednesday afternoon through late Wednesday night
for central u.S. Waters strait of juan de fuca-east
entrance u.S. Waters strait of juan de fuca.

Gale warning until 6 am pdt Wednesday for central u.S. Waters
strait of juan de fuca-east entrance u.S. Waters strait of
juan de fuca.

Small craft advisory from 6 pm this evening to 6 am pdt
Wednesday for admiralty inlet-northern inland waters
including the san juan islands.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHYW1 - 9449424 - Cherry Point, WA 19 mi50 min SE 8.9 G 12 59°F 54°F1014.6 hPa
CPMW1 19 mi50 min SE 11 G 13 59°F 54°F
FRDW1 - 9449880 - Friday Harbor, WA 30 mi50 min E 1.9 G 2.9 58°F 52°F1015.5 hPa
46118 32 mi90 min SE 18 59°F 1014.8 hPa55°F
46088 - New Dungeness, WA (Hein Bank) 45 mi60 min W 18 G 21 56°F 51°F4 ft1014.8 hPa53°F
SISW1 - Smith Island, WA 47 mi80 min WSW 22 G 28 56°F 1015.6 hPa (+0.6)
PBFW1 - Padilla Bay Reserve, WA 48 mi50 min S 8 58°F 1017 hPa55°F

Wind History for Cherry Point, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Eastsound, Orcas Island Airport, WA21 mi25 minS 1210.00 miFair61°F53°F77%1015.2 hPa

Wind History from ORS (wind in knots)
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Last 24hrCalmS3S3CalmCalmS3CalmCalmCalmN3N3NW3S6N44S9S9S12
G17
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1 day agoSE3S4S4S4CalmCalmCalmCalmCalmCalmN3N5N4NW4N5N3N3CalmCalmCalmCalmCalmS3S4
2 days agoS5S4S5S4S65CalmS556CalmN4N4N4N4CalmS6S6CalmSE4S4S4SE5SE3

Tide / Current Tables for Samuel Island (North Shore), British Columbia
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Samuel Island (North Shore)
Click for Map
Wed -- 01:35 AM PDT     7.62 feet Low Tide
Wed -- 06:17 AM PDT     Sunrise
Wed -- 06:53 AM PDT     11.12 feet High Tide
Wed -- 08:28 AM PDT     Moonrise
Wed -- 01:21 PM PDT     3.11 feet Low Tide
Wed -- 08:12 PM PDT     Sunset
Wed -- 08:26 PM PDT     12.98 feet High Tide
Wed -- 09:23 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.67.77.78.29.11010.811.110.69.47.65.74.13.23.34.56.28.310.31212.912.81210.6

Tide / Current Tables for Boat Passage, British Columbia Current
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Boat Passage
Click for Map
Wed -- 12:13 AM PDT     0.01 knots Slack
Wed -- 02:55 AM PDT     3.53 knots Max Flood
Wed -- 05:44 AM PDT     -0.00 knots Slack
Wed -- 06:17 AM PDT     Sunrise
Wed -- 08:28 AM PDT     Moonrise
Wed -- 09:00 AM PDT     -4.60 knots Max Ebb
Wed -- 11:58 AM PDT     0.00 knots Slack
Wed -- 03:14 PM PDT     5.40 knots Max Flood
Wed -- 06:38 PM PDT     -0.01 knots Slack
Wed -- 08:12 PM PDT     Sunset
Wed -- 09:23 PM PDT     Moonset
Wed -- 09:44 PM PDT     -4.72 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.51.63.13.52.91.4-0.5-2.5-4-4.6-4-2.30.12.54.55.45.13.71.5-0.9-3-4.4-4.7-3.8

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of PacificNorthwest    EDIT
Geos

Wind Forecast for Seattle, WA (4,6,7,8)
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Ground Weather Radar Station Seattle/Tacoma, WA
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weather_mapweather_map weather_map

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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.