Tuesday, March28, 2017 L-36.com


Marine Weather and Tides
Bryn Mawr-Skyway, 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 6:51AMSunset 7:35PM Tuesday March 28, 2017 2:37 PM PDT (21:37 UTC) Moonrise 6:33AMMoonset 7:33PM Illumination 2% 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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PZZ135 Puget Sound And Hood Canal- 821 Am Pdt Tue Mar 28 2017
.small craft advisory in effect...
Today..S wind 20 to 30 kt. Wind waves 3 to 5 ft. Rain.
Tonight..S wind 15 to 25 kt. Wind waves 2 to 4 ft. Rain.
Wed..S wind 20 to 30 kt. Wind waves 3 to 5 ft. Rain turning to showers in the afternoon.
Wed night..SW wind 15 to 25 kt easing to 5 to 15 kt after midnight. Wind waves 2 to 4 ft subsiding to 1 or 2 ft.
Thu..Variable wind to 10 kt. Wind waves 1 ft or less.
Thu night..NW wind to 10 kt. Wind waves 1 ft or less.
Fri..S wind to 10 kt. Wind waves 1 ft or less.
Sat..S wind 10 to 20 kt. Wind waves 1 to 3 ft.
PZZ100 821 Am Pdt Tue Mar 28 2017
Synopsis for the northern and central washington coastal and inland waters..A front is over the area today and another front will move through the region Wednesday. High pressure will build into the region Thursday and Friday. A front might approach the coast around Friday night.

7 Day Forecast for Marine Location Near Bryn Mawr-Skyway, WA
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location: 47.52, -122.26     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 281637
afdsew
area forecast discussion
national weather service seattle wa
915 am pdt Tue mar 28 2017

Synopsis A pair of wet frontal systems in quick succession will
bring rain to western washington today through Wednesday, along with
locally windy conditions. An upper trough will follow on Thursday
for showers and Sun breaks, and an upper ridge will bring dry
weather Friday. Weak fronts will move through the area this weekend
with a chance of rain in the forecast.

Short term A warm front is bringing steady rain to much of
western washington this morning except for the rain shadowed areas
northeast of the olympics. Precipitation is heaviest over the
olympic peninsula, especially along the north coast, and south/west
facing slopes of the olympics which had nearly 2 inches the past 12
hours. This is somewhat heavier and faster that was anticipated.

Rivers running off the olympics will need to be monitored closely,
mainly the skokomish but also the bogachiel which is rising quicker
than forecast. Rain intensity over the cascades will also pick up
today, and some rivers could approach bankfull tonight. See the
latest hydrology discussion below for details.

Snow levels are near 3000 to 3500 feet this morning with some snow
accumulation likely in the passes, perhaps up to 4 or 5 inches. Snow
levels are expected to rise to nearly 6000 feet this evening which
will bring a switch over from snow to rain at the passes and even at
some higher locations like paradise. This should keep amounts
generally below advisory criteria. The one spot that could get 6+
inches might be mount baker depending on how quickly warm air
arrives giving a mix or change over to rain tonight. However, the
north interior is also partially shadowed off the olympics which may
also hinder snow amounts. Will not issue an advisory but the north
cascades of whatcom and skagit counties should see the most snow
before switching over. Call 5-1-1 for road conditions prior to
departing through mountain passes as conditions could still get
rather slick with some accumulation expected.

The 06z models trended slightly deeper with the 1006-1008 mb low
tracking into vancouver island and also a little closer to
washington. This could generate a somewhat stronger meso low setting
up over the northeast side of the olympics on Wednesday as the main
low reaches central vancouver island. Breezy conditions today could
become windy in a few spots on Wednesday with gusts up to 40 mph
from around everett to admiralty inlet. Will need to evaluate all
the new 12z model data to see if those areas could see advisory
level gusts of 45 mph or higher. Regardless, it will be breezy to
locally wind with saturated soils making it easy for some trees to
topple. Rainfall totals in the lowlands from around seattle/everett
southward including the coast, southwest interior, and east lowlands
could reach 1 inch or more through Wednesday, causing further soil
saturation. This will cause the already elevated landslide risk to
be even higher the next 2 days.

Showers will taper late Wednesday and Wednesday night. A few inches
of snow will probably fall in the mountains, including the passes as
snow levels fall back to 3000 feet Wednesday night. An open trough
will cross the region Thursday with some additional showers and the
puget sound convergence zone could be active between snohomish and
king counties. Highs will remain cool in the lower 50s. Mercer

Long term From previous discussion... Models agree than an upper
ridge will progress across the pacific northwest on Friday, and it
should be a day of dry weather for western washington. Westerly flow
will develop behind the ridge Friday night, with a couple relatively
weak systems bringing a chance of rain and some mountain snow to the
forecast area Saturday and Sunday. The snow level should be around
5000 ft Saturday and 4000 ft Sunday. An upper trough will follow the
second system late Sunday or Sunday night for a partly sunny day
with a chance of showers on Monday. Mcdonnal

Aviation A front will bring rain to western washington today with
the mountains obscured and strong westerly flow aloft. There is low
pressure moving into british columbia and breezy southerly pressure
gradients over the area. There will be periods of rain right through
Wednesday morning and then a cold FROPA will occur Wed afternoon.

Ksea... Rainy middling TAF looks good with a decent southerly breeze
through Wednesday morning. Periods of rain will give way to showers
later Wednesday afternoon as a cold FROPA occurs.

Marine Pretty decent southerly flow today through Wednesday with
the wind rising to 20-30kt southerlies at times til the cold frontal
passage on Wednesday brings in westerlies. High pressure will build
into the region for Thursday and Friday and then a front may reach
the coast Friday night.

Hydrology Up to 2 inches of rain fell the past 12 hours along
south and west facing slopes of the olympics. Another 1 to 2 inches
could fall there today and another 1 to 2 inches tonight. This could
bring rain totals up to 6 inches which means flooding is likely on
the skokomish river. Area rivers, especially those running off the
olympics are rising faster that forecast and will need to make some
adjustments to some rivers, specially the skokomish river which
could flood by tonight rather than Wednesday. Some rivers in the
central cascades could also reach bankfull with 2-3 inches possible
in some basins through tonight. Forecasts should be closely the next
couple days for the potential of additional watches and/or warnings.

The skokomish river in mason county is the only river forecast to
flood but forecasts for all area at this time. Refer to the latest
flood watch statement on our website at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
EBSW1 - 9447130 - Seattle, WA 7 mi49 min SSE 7 G 9.9 51°F 47°F1023.2 hPa
WPOW1 - West Point, WA 14 mi37 min S 18 G 19 50°F 1022.3 hPa (+0.0)45°F
TCMW1 - 9446482 - Tacoma Met, WA 19 mi49 min SSE 7 G 12
TCNW1 - 9446484 - Tacoma, WA 19 mi55 min 53°F 46°F1023.4 hPa
46121 30 mi43 min 14 49°F 1022.6 hPa45°F
PTWW1 - 9444900 - Port Townsend, WA 49 mi55 min ESE 19 G 23 50°F 47°F1020.8 hPa

Wind History for Seattle, Puget Sound, WA, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Seattle, Seattle Boeing Field, WA2 mi44 minS 910.00 miLight Rain51°F46°F86%1023 hPa
Renton, Renton Municipal Airport, WA3 mi44 minSE 610.00 miLight Rain52°F45°F77%1023.5 hPa
Seattle, Seattle-Tacoma International Airport, WA6 mi44 minS 910.00 miLight Rain50°F44°F80%1023.7 hPa
Tacoma, Tacoma Narrows Airport, WA24 mi44 minS 14 G 2210.00 miOvercast51°F43°F74%1023.1 hPa

Wind History from BFI (wind in knots)
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1 day agoCalmCalm4SE4SE5SE7SE11S9S8S7S9S7SE8S6SE7SE5S5SE8S6S7S7S9
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2 days agoS76S10S6S6S4S6S3SE7SE4SE4SE3SE4E4E4SE4SE4SE3SE4CalmSE6SE3CalmW4

Tide / Current Tables for Duwamish Waterway, Washington
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Duwamish Waterway
Click for Map
Tue -- 05:50 AM PDT     11.43 feet High Tide
Tue -- 06:55 AM PDT     Sunrise
Tue -- 07:33 AM PDT     Moonrise
Tue -- 12:18 PM PDT     1.43 feet Low Tide
Tue -- 06:13 PM PDT     10.68 feet High Tide
Tue -- 07:33 PM PDT     Sunset
Tue -- 08:32 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.42.44.579.41111.410.79.16.94.52.51.51.83.35.57.99.810.710.49.27.35.23.2

Tide / Current Tables for Restoration Point, 0.6 miles ESE of, Washington Current
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Restoration Point
Click for Map
Tue -- 12:35 AM PDT     0.00 knots Slack
Tue -- 02:42 AM PDT     0.67 knots Max Flood
Tue -- 06:04 AM PDT     -0.00 knots Slack
Tue -- 06:55 AM PDT     Sunrise
Tue -- 07:33 AM PDT     Moonrise
Tue -- 09:29 AM PDT     -1.00 knots Max Ebb
Tue -- 01:04 PM PDT     0.00 knots Slack
Tue -- 03:10 PM PDT     0.68 knots Max Flood
Tue -- 06:35 PM PDT     -0.00 knots Slack
Tue -- 07:34 PM PDT     Sunset
Tue -- 08:33 PM PDT     Moonset
Tue -- 09:50 PM PDT     -0.91 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.20.20.60.70.60.30-0.4-0.8-1-1-0.8-0.4-00.40.70.60.50.2-0.2-0.6-0.8-0.9-0.8

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 (17,4,5,8)
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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.