Wednesday, June28, 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 5:08AMSunset 9:22PM Wednesday June 28, 2017 5:04 AM PDT (12:04 UTC) Moonrise 9:50AMMoonset 11:29PM Illumination 20% Phase: Waxing Crescent; Moon at 4 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- 235 Am Pdt Wed Jun 28 2017
Today..SW wind 5 to 15 kt becoming W in the afternoon. Wind waves 2 ft or less.
Tonight..SW wind 10 to 20 kt. Wind waves 1 to 3 ft.
Thu..SW wind to 10 kt becoming W in the afternoon. Wind waves 1 ft or less.
Thu night..SW wind 5 to 15 kt. Wind waves 2 ft or less.
Fri..Light wind becoming sw 5 to 15 kt in the afternoon. Wind waves less than 1 ft becoming 2 ft or less in the afternoon.
Fri night..SW wind 15 to 25 kt. Wind waves 2 to 4 ft.
Sat..SW wind 10 to 20 kt. Wind waves 1 to 3 ft.
Sun..SW wind 5 to 15 kt becoming 10 to 20 kt. Wind waves 1 to 3 ft.
PZZ100 235 Am Pdt Wed Jun 28 2017
Synopsis for the northern and central washington coastal and inland waters..High pressure offshore with low pressure east of the cascades will maintain onshore flow of varying strength through this weekend. The flow will become strong enough Friday afternoon and evening for the possibility of gale force winds over parts of the strait of juan de fuca.

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 281046
afdsew
area forecast discussion
national weather service seattle wa
346 am pdt Wed jun 28 2017

Synopsis A surface ridge offshore will maintain onshore flow
across western washington into early next week. This will produce
typical early summer weather with mild temperatures and morning low
clouds and afternoon sunshine. An upper level ridge will weaken the
onshore flow and produce a minor warming trend Thursday and Friday.

Stronger onshore flow will bring a bit more cloud cover this
weekend. A weak front could bring a few showers to mainly the coast
on Sunday.

Short term Satellite imagery shows stratus along the coast
through the lower chehalis valley and into the central puget sound
area at 3 am 10z. In other locations over the interior the stratus
is just beginning to form. Temperatures at 3 am were in the upper
40s and 50s.

Little change in the weather today versus Tuesday with low level
onshore flow continuing over the area with weak trofiness aloft
early in the day. Onshore gradients are almost identical to
yesterday morning. The stratus has been a little slower to
form spread inland this morning but with the satellite imagery
showing the areas that were clear starting to fill in at 3 am
expect most of the lowland to have stratus by 15z. Model cross
sections show the marine layer depth pretty similar to yesterday.

End result is a persistence forecast for today with the stratus
burning back to the coast midday. High will be similar to Tuesdays
readings with mid 60s along the coast and mid 60s to mid 70s
inland.

Upper level ridge offshore moving eastward later today and
tonight. 500 mb heights rising over the area with the ridge axis
just offshore at 12z Thursday. Low level onshore flow weakens
resulting in less morning cloud cover for the interior Thursday
morning. With less cloud cover and the warming temperatures aloft
highs on Thursday will be a few degrees warmer with mid and upper
60s on the coast and 70s common over the interior. Lows tonight
will mostly be in the 50s.

Upper level ridge moving through the area Thursday night into
Friday morning with 500 mb heights peaking in the lower to mid
580 dms. Onshore pressure gradients don't begin to increase again
until Friday afternoon making for a mostly sunny day across most
of the area on Friday. Friday will be the warmest day in the
forecast period with some lower 80s from seattle south. North of
seattle 70s will be common with highs near 70 on the coast.

Long term Extended models in good agreement for the weekend
with zonal flow aloft and low level onshore flow on Saturday for
morning clouds and some afternoon sunshine over the interior. A
weak trough approaches the coast on Sunday for a slight chance of
showers in the morning. Low level onshore flow remaining intact
through Monday with a weak trough remaining over the area for a
continuation of the morning clouds with some afternoon sunshine
scenario for the interior. Some differences show up in the models
for the 4th with the GFS beginning to build a ridge while the
ecmwf keeps the weak trough in the area. Both solutions are dry.

Current forecast is closer to the less cloud cover a few degrees
warmer GFS solution. Will stay with that idea for the morning
forecast package. Felton

Aviation A weak upper level trough will continue to shift east
and high pressure offshore will slowly nudge toward the area. The
low level flow will remain onshore. Areas of coastal marine stratus
will spread back inland around daybreak and will burn off by
afternoon.

Ksea... Morning low clouds should set up around daybreak and then
burn off late in the morning.

Marine Higher pres offshore with lower pres E of the cascades
will maintain onshore flow of varying strength through the week.

The flow will become strong Friday afternoon and evening
for the possibility of gale force winds over parts of the strait of
juan de fuca.

Sew watches warnings advisories
Wa... None.

Pz... None.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHYW1 - 9449424 - Cherry Point, WA 19 mi47 min SSE 2.9 G 5.1 1014.6 hPa
CPMW1 19 mi47 min S 8 G 8 53°F
FRDW1 - 9449880 - Friday Harbor, WA 30 mi89 min Calm G 1.9 51°F 51°F1014.8 hPa
46146 - Halibut Bank 42 mi65 min WNW 18 G 19 59°F 62°F2 ft1014.1 hPa (+0.3)
46088 - New Dungeness, WA (Hein Bank) 45 mi45 min WSW 12 G 14 52°F 51°F1 ft1014 hPa51°F
SISW1 - Smith Island, WA 47 mi65 min SW 8.9 G 12 52°F 1014.8 hPa (+0.5)
PBFW1 - Padilla Bay Reserve, WA 48 mi95 min SSE 2.9 51°F 1015 hPa50°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 mi70 minN 010.00 mi54°F51°F94%1014.6 hPa

Wind History from ORS (wind in knots)
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Last 24hrS6S9S10S8S8S85N5N44N44N4CalmCalmCalmS6S7S8SE4CalmS3CalmCalm
1 day agoS9S7S12
G17
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S9S8S8S8S6S5S13S11S8S6S7S8
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2 days agoCalmNW4NW5CalmN7NW8NW7
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6NW55CalmNW4CalmS4S5S5S7
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Tide / Current Tables for Samuel Island (North Shore), British Columbia
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Samuel Island (North Shore)
Click for Map
Wed -- 04:22 AM PDT     9.22 feet Low Tide
Wed -- 05:12 AM PDT     Sunrise
Wed -- 08:30 AM PDT     10.27 feet High Tide
Wed -- 10:50 AM PDT     Moonrise
Wed -- 03:27 PM PDT     2.94 feet Low Tide
Wed -- 09:20 PM PDT     Sunset
Wed -- 11:12 PM PDT     13.91 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
13.312.110.89.79.39.39.61010.210.29.78.67.15.43.933.14.15.87.89.911.913.313.9

Tide / Current Tables for Boat Passage, British Columbia Current
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Boat Passage
Click for Map
Wed -- 02:51 AM PDT     0.00 knots Slack
Wed -- 05:12 AM PDT     Sunrise
Wed -- 05:17 AM PDT     2.59 knots Max Flood
Wed -- 07:52 AM PDT     -0.00 knots Slack
Wed -- 10:50 AM PDT     Moonrise
Wed -- 11:12 AM PDT     -3.90 knots Max Ebb
Wed -- 02:06 PM PDT     0.00 knots Slack
Wed -- 05:34 PM PDT     5.40 knots Max Flood
Wed -- 09:09 PM PDT     -0.01 knots Slack
Wed -- 09:19 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-4.5-3.4-1.70.31.82.62.41.3-0.2-1.9-3.2-3.9-3.6-2.3-0.22.14.15.25.34.32.50.4-1.8-3.5

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 (8,2,3,4)
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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.