Thursday, April27, 2017 L-36.com


Marine Weather and Tides
Raft Island, WA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 5:56AMSunset 8:18PM Thursday April 27, 2017 7:37 PM PDT (02:37 UTC) Moonrise 6:14AMMoonset 8:59PM Illumination 4% Phase: Waxing Crescent; Moon at 2 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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PZZ135 Puget Sound And Hood Canal- 300 Pm Pdt Thu Apr 27 2017
Tonight..NW wind 10 to 20 kt north part. SW wind 10 to 20 kt south part. Wind all areas becoming sw to 10 kt after midnight. Wind waves 1 to 3 ft subsiding to 1 ft or less. Scattered evening showers.
Fri..SE wind to 10 kt. Wind waves 1 ft or less.
Fri night..NW wind 10 to 20 kt becoming se 5 to 15 kt after midnight. Wind waves 1 to 3 ft.
Sat..S wind 5 to 15 kt. Wind waves 2 ft or less.
Sat night..SW wind 5 to 15 kt becoming S 15 to 25 kt after midnight. Wind waves 2 ft or less building to 2 to 4 ft.
Sun..SW wind 15 to 25 kt becoming nw 5 to 15 kt in the afternoon. Wind waves 2 to 4 ft subsiding to 2 ft or less.
Sun night..N wind 5 to 15 kt becoming S after midnight. Wind waves 2 ft or less.
Mon..S wind to 10 kt becoming nw. Wind waves 1 ft or less.
Tue..Light wind becoming N to 10 kt. Wind waves 1 ft or less.
PZZ100 300 Pm Pdt Thu Apr 27 2017
Synopsis for the northern and central washington coastal and inland waters..Onshore flow will strengthen this evening...then weaken late tonight and Friday. High pressure over the area will give light winds Friday and Friday night. A front will bring increasing winds Saturday afternoon and night. Strong onshore flow Sunday will ease Monday.

7 Day Forecast for Marine Location Near Raft Island, WA
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location: 47.33, -122.67     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 272219
afdsew
area forecast discussion
national weather service seattle wa
319 pm pdt Thu apr 27 2017

Synopsis A weak low pressure system over the region will exit
late tonight, and will be followed by high pressure. Another low
pressure system will bring more precipitation to the area on
Saturday. Expect a chance of post-frontal showers on Sunday.

Short term
There were scattered showers over the area this afternoon. A few of
the showers contained small hail per an observation from a cocorahs
observer in lake stevens.

Based on satellite and radar data, it appeared that the puget sound
convergence zone (pscz) has developed along a line roughly from near
hoodsport to auburn and then east into the cascades. Expect the pscz
to strengthen some this afternoon in response to increased westerly
flow through the strait of juan de fuca. The pscz might briefly shift
slightly north of its current position this afternoon, impacting
places such as sea-tac, burien, and bremerton. The pscz will drift
into pierce county this evening before dissipating overnight.

Meanwhile, an upper level trough of low pressure presently over the
region will move into the intermountain region late tonight. Expect
a ridge of high pressure aloft to build into the area from the west
during the day Friday. There will probably be a few instability
showers over the mountains during the day; otherwise, expect dry
weather with near or slightly below normal MAX temps.

High pressure aloft will prevail over the region Friday night before
shifting east during the day Saturday. Expect a low pressure system
to approach the pacific northwest on Saturday for a threat of
precipitation. The latest GFS was a little faster than its previous
solutions. Chose to compromise between the faster and slower model
solutions. At any rate, it now looks like there will be a threat of
precip over the entire CWA Saturday afternoon.

Saturday night still appeared wet for the cwa. The cold or occluded
front is anticipated to sweep across the area by daybreak Sunday.

The upper trough will move across the region on Sunday for post-
frontal showers.

Long term
Confidence in this period was not very high, especially concerning
the details. It looks like the overall trend in the models was to
gradually build an upper level ridge over the pacific northwest. A
warm front may bring some precipitation to the CWA early in the
period; otherwise, look for warmer and drier conditions the middle
of next week. Day 7 was a question mark. It might end up being a
transition day from warm, dry conditions back to cool and unsettled
weather.

Aviation Moderate northwest flow aloft will weaken tonight and
become more northerly Friday. Moderate to strong low level
onshore flow will decrease overnight. The air mass is moist and
weakly unstable with scattered showers. A puget sound convergence
zone is likely to form early this evening and drift south.

Ceilings will remainVFR into the evening, then subside into 2-4k
ft ceilings late tonight. Friday will be mostlyVFR.

Ksea... Discussion above applies. Southwesterly wind 10-14 kt
will switch to northerly by 00z. Winds should switch back to
southwesterly by late evening. Puget sound convergence zone may
produce showers at the terminal this afternoon and evening. Chb

Marine Onshore flow will increase late this afternoon and
evening and will probably produce gale westerlies in the strait.

The gale warning is already in effect. There is a small craft
advisory in effect everywhere else except puget sound. A pscz will
switch the winds in puget sound from southerly to northerly this
afternoon, at least over the northern part.

High pressure over the area will give light winds Friday into
Saturday morning. A front will bring increasing winds to the coastal
waters Saturday afternoon and to to the inland waters Saturday
night. Strong onshore flow Sunday will ease Monday. Chb

Sew watches/warnings/advisories
Wa... None.

Pz... Gale warning until midnight pdt tonight for central u.S. Waters
strait of juan de fuca-east entrance u.S. Waters strait of
juan de fuca.

Small craft advisories are in effect for the remaining waters
except the puget sound/hood canal.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46121 5 mi14 min 12 50°F 1018.7 hPa43°F
TCNW1 - 9446484 - Tacoma, WA 14 mi49 min 1019.6 hPa
TCMW1 - 9446482 - Tacoma Met, WA 14 mi49 min NNW 7 G 8
WPOW1 - West Point, WA 26 mi97 min NNE 12 G 13 50°F 1019.1 hPa (+0.3)42°F
EBSW1 - 9447130 - Seattle, WA 26 mi49 min NW 1.9 G 9.9 53°F 48°F1019.4 hPa

Wind History for Tacoma MET, WA
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NE4
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G27
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Tacoma, Tacoma Narrows Airport, WA6 mi44 minNNW 63.00 miRain Fog/Mist47°F43°F86%1019.8 hPa
Tacoma / McChord Air Force Base, WA15 mi1.7 hrsW 810.00 miMostly Cloudy55°F37°F52%1019.1 hPa
Fort Lewis / Gray U. S. Army Airfield, WA17 mi1.7 hrsWNW 6 G 1210.00 miPartly Cloudy54°F34°F48%1019.9 hPa
Seattle, Seattle-Tacoma International Airport, WA21 mi44 minVar 610.00 miOvercast51°F39°F64%1020.2 hPa
Seattle, Seattle Boeing Field, WA24 mi44 minNNE 610.00 miMostly Cloudy54°F37°F55%1019.4 hPa

Wind History from TIW (wind in knots)
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Last 24hrSW11SW11
G20
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SW8SW8
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SW9SW7S8S6S4S7SW8SW6SW9S10SW9
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SW10S10N6Calm4N6
1 day agoN3CalmCalmSE4S12S12S11S9S10
G17
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2 days agoS8S7S8SW5S6S7S7S7S8S5S5S5S7SE4S6SW66S9S7SW8S9S4SW5W4

Tide / Current Tables for Horsehead Bay, Carr Inlet, Puget Sound, Washington
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Horsehead Bay
Click for Map
Thu -- 12:41 AM PDT     4.11 feet Low Tide
Thu -- 06:00 AM PDT     Sunrise
Thu -- 06:11 AM PDT     14.05 feet High Tide
Thu -- 07:14 AM PDT     Moonrise
Thu -- 01:07 PM PDT     -1.73 feet Low Tide
Thu -- 07:46 PM PDT     14.17 feet High Tide
Thu -- 08:16 PM PDT     Sunset
Thu -- 09:58 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.54.25.57.810.612.91413.611.78.95.52.1-0.6-1.7-11.558.711.813.714.113.211.38.8

Tide / Current Tables for Hale Passage, West end, Washington Current
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Hale Passage
Click for Map
Thu -- 01:15 AM PDT     0.01 knots Slack
Thu -- 02:39 AM PDT     1.41 knots Max Flood
Thu -- 04:16 AM PDT     -0.00 knots Slack
Thu -- 06:00 AM PDT     Sunrise
Thu -- 07:14 AM PDT     Moonrise
Thu -- 08:56 AM PDT     -2.70 knots Max Ebb
Thu -- 01:23 PM PDT     0.01 knots Slack
Thu -- 03:16 PM PDT     2.12 knots Max Flood
Thu -- 05:41 PM PDT     -0.00 knots Slack
Thu -- 08:16 PM PDT     Sunset
Thu -- 09:50 PM PDT     -2.00 knots Max Ebb
Thu -- 09:58 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1-0.211.30.4-0.6-1.4-2.1-2.6-2.7-2.5-2.1-1.4-0.412.11.80.8-0.3-1-1.6-1.9-2-1.8

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 (22,6,7,8)
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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.