Friday, April20, 2018 L-36.com


Marine Weather and Tides
Federal Way, WA

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 6:07AMSunset 8:08PM Friday April 20, 2018 8:47 PM PDT (03:47 UTC) Moonrise 8:47AMMoonset 12:00AM Illumination 32% Phase: Waxing Crescent; Moon at 6 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- 217 Pm Pdt Fri Apr 20 2018
.small craft advisory in effect through Saturday morning...
Tonight..SW wind to 10 kt becoming S 15 to 25 kt after midnight. Wind waves 1 ft or less building to 2 to 4 ft after midnight. A slight chance of rain in the evening then rain after midnight.
Sat..SW wind 15 to 25 kt becoming variable 5 to 15 kt in the afternoon. Wind waves 2 to 4 ft subsiding to 1 or 2 ft. A chance of showers in the morning then a slight chance of showers in the afternoon.
Sat night..NW wind 5 to 15 kt in the evening becoming light. Wind waves 2 ft or less.
Sun..Light wind becoming N to 10 kt in the afternoon. Wind waves 1 ft or less.
Sun night..N wind to 10 kt in the evening becoming light. Wind waves 1 ft or less.
Mon..Light wind. Wind waves less than 1 ft.
Mon night..N wind to 10 kt in the evening becoming light. Wind waves 1 ft or less.
Tue..Light wind becoming nw to 10 kt. Wind waves 1 ft or less.
Wed..Light wind becoming nw to 10 kt. Wind waves 1 ft or less.
PZZ100 217 Pm Pdt Fri Apr 20 2018
Synopsis for the northern and central washington coastal and inland waters..A cold front will move through western washington tonight. High pressure will build into the region over the weekend. Thermal low pressure will set up along the oregon coast Monday and Tuesday as an upper ridge shifts over the pacific northwest.

7 Day Forecast for Marine Location Near Federal Way, WA
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location: 47.33, -122.34     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 202155
afdsew
area forecast discussion
national weather service seattle wa
255 pm pdt Fri apr 20 2018

Synopsis A warm front will brush the area this evening. A
trailing cold front will move through overnight with decreasing
showers behind the front Saturday. A dry upper trough will cross
the area Sunday. An upper level ridge will build in Sunday night
and remain over western washington through most of next week for
an extended dry and warm spell.

Short term A weak warm front will move through the area this
evening with spotty light rain - mainly coast and northwest
interior. A trailing cold front will bring a quick shot of rain to
most of the area later tonight.

Showers behind the front will quickly become mostly confined to
the mountains Saturday. Moderate onshore flow will produce breezy
to locally windy conditions behind the cold front. It will be a
few degrees cooler compered to today but still close to normal. A
puget sound convergence zone will likely form during the day and
linger into Saturday night.

Sunday is looking dry with decreasing clouds. A weak upper trough
will cross the area in the morning with an upper upper ridge
building in from the west later in the day. Highs will once again
be near normal. The upper ridge will move overhead on Monday for
dry and warmer weather. Schneider

Long term High pressure aloft will produce mostly sunny and
warm weather Tuesday through Thursday. Highs will warm into the
70s many areas. Thursday will probably be the warmest day -
possibly near 80 in spots with low level offshore flow. Onshore
flow is expected to develop Friday which should cool highs back
into the 60s. Some showers could also move into the area from the
south. Schneider

Aviation Clouds will thicken up through this evening as a weak
warm front clips the area. There are areas of rain on the coast
that will spread inland overnight. The cold front will move ashore
overnight and then the rain will turn to showers Saturday
morning. A pscz should develop Saturday, then shift south and
break up later in the day. The mountains will become obscured
tonight and remain mostly obscured Saturday.

Ksea... Rain will increase overnight then turn to showers
Saturday morning. It will become breezy overnight. A pscz will
develop Saturday morning then shift south through seattle in the
afternoon.

Marine A warm front will clip the area this afternoon and
evening and then a stronger cold front will push through the area
overnight. Small craft advisories for the waters will give way to
gale warnings for the central and eastern strait of juan de fuca
behind the cold front--several hours of gales just after daybreak
seem likely at race rocks and in the central strait to perhaps
smith island. High pressure will build into the area behind the
front and into Sunday. A thermal trough will set up along the
oregon coast Monday and Tuesday, so we will probably see northerly
breezes develop over western washington Monday and Tuesday--
perhaps stronger than the current forecast and better for
afternoon sailing than the current forecast indicates which only
has north winds to 10 knots over the inland waters for now.

Sew watches warnings advisories
Wa... None.

Pz... Small craft advisory until noon pdt Saturday for coastal waters
from CAPE flattery to james island 10 to 60 nm-coastal
waters from CAPE flattery to james island out 10 nm-coastal
waters from james island to point grenville 10 to 60 nm-
coastal waters from james island to point grenville out 10
nm-coastal waters from point grenville to CAPE shoalwater
10 to 60 nm-coastal waters from point grenville to cape
shoalwater out 10 nm-puget sound and hood canal.

Small craft advisory until 3 am pdt Saturday for central u.S.

Waters strait of juan de fuca-east entrance u.S. Waters
strait of juan de fuca.

Gale warning from 3 am to noon pdt Saturday for central u.S.

Waters strait of juan de fuca-east entrance u.S. Waters
strait of juan de fuca.

Small craft advisory until 3 pm pdt Saturday for admiralty inlet-
northern inland waters including the san juan islands-west
entrance u.S. Waters strait of juan de fuca.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TCNW1 - 9446484 - Tacoma, WA 6 mi48 min 56°F 49°F1021.5 hPa (-0.6)
TCMW1 - 9446482 - Tacoma Met, WA 6 mi48 min WSW 1.9 G 2.9
EBSW1 - 9447130 - Seattle, WA 19 mi48 min WSW 2.9 G 5.1 56°F 48°F1021.3 hPa (-0.7)
46121 21 mi52 min 55°F 1021.5 hPa39°F
WPOW1 - West Point, WA 23 mi48 min S 8 G 8.9 54°F 1021 hPa (-0.8)40°F
46120 30 mi47 min NNW 7.8 50°F 1020.3 hPa43°F

Wind History for Tacoma MET, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Seattle, Seattle-Tacoma International Airport, WA8 mi55 minSW 510.00 miOvercast56°F36°F47%1021.8 hPa
Tacoma, Tacoma Narrows Airport, WA13 mi55 minSW 410.00 miOvercast53°F37°F57%1021.5 hPa
Renton Municipal Airport, WA13 mi55 minSE 310.00 miMostly Cloudy57°F36°F45%1021.3 hPa
Tacoma / McChord Air Force Base, WA14 mi1.8 hrsN 010.00 miPartly Cloudy56°F39°F55%1021.8 hPa
Boeing Field - King County International Airport, WA14 mi55 minSW 310.00 miOvercast56°F34°F44%1020.8 hPa
Pierce County-Thun Field, WA16 mi73 minN 010.00 miA Few Clouds55°F39°F55%1021.3 hPa
Fort Lewis / Gray U. S. Army Airfield, WA21 mi1.8 hrsWNW 510.00 miA Few Clouds55°F39°F56%1021.8 hPa

Wind History from SEA (wind in knots)
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Last 24hrN6N7N9NE8NE3NE3E3S3SE4SE5SE7SE5S5S43S8SW8SW7SW11W7W3W5W6SW5
1 day agoNE7NE5N5N8NE6N5N5NE4CalmCalmSE4CalmN5N43NE3NW95CalmW5N6W8W5N6
2 days agoSW8SW9S5S4S4SE5E4E5E3NE3N4NW4N6N7N12
G18
N10N8N7N8NW10N9NE9N7N5

Tide / Current Tables for Des Moines, Washington
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Des Moines
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Fri -- 12:29 AM PDT     Moonset
Fri -- 02:49 AM PDT     5.94 feet Low Tide
Fri -- 06:11 AM PDT     Sunrise
Fri -- 07:56 AM PDT     10.93 feet High Tide
Fri -- 09:47 AM PDT     Moonrise
Fri -- 03:06 PM PDT     -1.36 feet Low Tide
Fri -- 08:05 PM PDT     Sunset
Fri -- 10:21 PM PDT     11.65 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
97.56.366.67.99.410.510.910.48.86.53.91.4-0.5-1.4-0.813.56.38.910.711.611.5

Tide / Current Tables for Skagit Bay, 1 mile S of Goat Island, Washington Current
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Skagit Bay
Click for Map
Fri -- 12:04 AM PDT     0.02 knots Slack
Fri -- 12:30 AM PDT     Moonset
Fri -- 02:43 AM PDT     1.47 knots Max Flood
Fri -- 05:40 AM PDT     -0.06 knots Slack
Fri -- 06:12 AM PDT     Sunrise
Fri -- 09:14 AM PDT     -1.46 knots Max Ebb
Fri -- 09:48 AM PDT     Moonrise
Fri -- 11:51 AM PDT     0.06 knots Slack
Fri -- 03:13 PM PDT     1.92 knots Max Flood
Fri -- 07:07 PM PDT     -0.03 knots Slack
Fri -- 08:06 PM PDT     Sunset
Fri -- 10:05 PM PDT     -1.34 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.311.41.51.30.8-0.6-1.1-1.3-1.5-1.4-10.41.31.71.91.91.61.10.2-0.9-1.2-1.3-1.2

Weather Map and Satellite Images
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wmap_P
GOES Local Image of PacificNorthwest    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.
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Wind Forecast for Seattle, WA (23,6,7,8)
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Ground Weather Radar Station Seattle/Tacoma, WA
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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.