Saturday, February24, 2018 L-36.com


Marine Weather and Tides
Steilacoom, 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 6:55AMSunset 5:50PM Saturday February 24, 2018 7:32 AM PST (15:32 UTC) Moonrise 12:05PMMoonset 2:37AM Illumination 69% Phase: Waxing Gibbous; Moon at 9 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- 241 Am Pst Sat Feb 24 2018
.small craft advisory in effect until 7 am pst this morning...
Today..SW wind 15 to 25 kt early easing to 10 to 20 kt. Wind waves 2 to 4 ft early subsiding to 1 to 3 ft. A chance of showers.
Tonight..SW wind 10 to 20 kt becoming S 25 to 30 kt after midnight. Wind waves 1 to 3 ft building to 3 to 5 ft after midnight. A chance of showers in the evening then rain after midnight.
Sun..SW wind 20 to 30 kt easing to 10 to 20 kt in the afternoon. Wind waves 3 to 5 ft subsiding to 1 to 3 ft in the afternoon. Rain likely in the morning then showers in the afternoon.
Sun night..SW wind 5 to 15 kt becoming S after midnight. Wind waves 2 ft or less.
Mon..S wind to 10 kt. Wind waves 1 ft or less.
Mon night..S wind to 10 kt rising to 5 to 15 kt after midnight. Wind waves 2 ft or less.
Tue..S wind 15 to 25 kt becoming sw 5 to 15 kt. Wind waves 2 to 4 ft subsiding to 2 ft or less.
Wed..SW wind to 10 kt becoming se. Wind waves 1 ft or less.
PZZ100 241 Am Pst Sat Feb 24 2018
Synopsis for the northern and central washington coastal and inland waters..Strong onshore flow will continue early this morning then ease. A strong system will move through the area tonight and Sunday with gales possible for the coastal waters and strait of juan de fuca. Weak high pres over the area Monday will be followed by another front on Tuesday.

7 Day Forecast for Marine Location Near Steilacoom, WA
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location: 47.17, -122.6     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 241200
afdsew
area forecast discussion
national weather service seattle wa
400 am pst Sat feb 24 2018

Synopsis Cool and unsettled weather will continue through the
end of next week. Next system arriving tonight into Sunday. Low
level onshore flow ahead and with the system will lift the snow
levels above the surface. A brief break in the action on Monday
before the next system arrives Monday night and Tuesday. A much
wetter system will arrive Wednesday night or Thursday.

Short term Satellite imagery shows upper level shortwave moving
into western washington early this morning. Low level onshore flow
has kept temperatures in the mid and upper 30s for the last few
hours with the exception of some cool air still trapped in
northeast portion of whatcom county.

Shortwave moving through western washington this morning. In
addition to the warmer temperatures dew points are in the lower to
mid 30s this morning. Outside of northeast whatcom county not
looking for any snow accumulations this morning in the lowlands
although with the heavier showers could see a rain snow mix.

Another inch of snow possible early this morning in northeast
whatcom county. Showers will decrease later this morning into the
afternoon hours with shortwave moving off to the east. In the
cascades another 4 to 6 inches of snow this morning will keep the
advisory up until noon.

Yet another in the series of weather system embedded in the north
northwesterly flow aloft moving into western washington late
tonight into Sunday. Good orographics with this system. Model 850
mb winds westerly at 25 to 40 knots with the stronger winds over
the central and southern cascades. A winter storm watch is up for
the cascades beginning tonight and continuing into Sunday. Will
stay with the watch in the morning package per coordination with
the portland office. If there are no changes in the 12z model run
look for the watch to get upgraded to a winter storm warning.

Onshore gradients increasing as the system approaches lifting the
snow level up to around 1000 feet. Kolm-kbli gradient peaking in
the early morning hours on Sunday near plus 6 mb so expect breezy
to windy conditions later tonight into Sunday morning. System
dropping south of the area Sunday afternoon with just scattered
showers over the area. Convergence zone developing Sunday morning
will continue into the afternoon hours. With westerly flow aloft
and strong southerly gradients expect the convergence to remain in
snohomish county. Highs on Sunday will be in the upper 30s and
lower 40s.

Cool upper level trough settling over western washington Sunday
night with shower activity decreasing. Convergence zone could sag
south Sunday evening as the flow aloft becomes more northwesterly
and the southerly surface gradients weaken. Snow levels lowering
back down to 500 feet or less but outside of the convergence zone
moisture will be limited. Lows Monday morning will be in the lower
to mid 30s.

A little bit of a break in the action on Monday with the cool
upper level trough to the south and northerly flow aloft over the
area. Can't rule out a shower at this point but if the trends
continue most of the area could squeeze out a dry day Monday.

Highs with some sunshine will be in the lower to mid 40s.

Long term Extended models in pretty good agreement this morning
with yet another system embedded in the northwest flow aloft
moving over the area Monday night into Tuesday. 00z model runs a
little wetter, warmer and stronger with the next front arriving
Wednesday night into Thursday. Cool upper level trough moving back
over the area Thursday night into Friday with another low snow
level scenario with showers. Felton

Aviation Moderate northwest flow aloft will continue today
before turning more westerly early Sunday morning. An upper trough
will move southeast across the area this morning. The air mass will
be moist, mainly below 10,000 ft. At the surface, moderate southerly
flow will continue.

Cigs this early morning generally a mix of MVFR to ifr
conditions... With clm and hqm proving to be outliers currently
reportingVFR conditions. As showers continue to move through the
area associated with the aforementioned upper level trough... Would
expect widespread MVFR to ifr conditions to persist through at least
the mid-morning. Late morning and afternoon should see improvement
into MVFR toVFR conditions as trough and showers exit the area. A
shortwave disturbance looks to enter the area tonight which may drag
cigs down slightly... With mostly MVFR conditions expected overnight
tonight.

Ksea... South to southwest winds this morning 10-15 kts with some
gusts up to 23 kts possible. Winds will ease into the 7-12 kt range
this afternoon and see direction shift somewhat to the west to
southwest... Returning to southerly in the evening. CIGS in ifr
conditions at the time of this writing as showers move through. May
see CIGS improve during dry gaps to MVFR conditions. More
substantial improvement will wait until the late morning or early
afternoon whereVFR CIGS will be possible. Smr

Marine Strong onshore flow will ease this morning. A strong
system will impact the region tonight and Sunday with gales
possible - gale watches are in effect. Seas will also build to 12
to 18 feet during this period. Weak high pressure will bring
lighter winds on Monday. Another cold front will arrive on
Tuesday. 33

Hydrology River flooding not expected in the next 7 days.

Sew watches warnings advisories
Wa... Winter weather advisory until noon pst today for cascades of
pierce and lewis counties-cascades of snohomish and king
counties-cascades of whatcom and skagit counties.

Winter storm watch from this evening through Sunday afternoon
for cascades of pierce and lewis counties-cascades of
snohomish and king counties-cascades of whatcom and skagit
counties.

Pz... Small craft advisory for rough bar until 6 am pst Sunday for
grays harbor bar.

Gale watch from late tonight through Sunday morning 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-west entrance u.S. Waters
strait of juan de fuca.

Small craft advisory until midnight pst tonight 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-west entrance u.S. Waters
strait of juan de fuca.

Small craft advisory until 7 am pst this morning for admiralty
inlet-northern inland waters including the san juan islands-
puget sound and hood canal.

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

Small craft advisory from 7 am this morning to midnight pst
tonight for central u.S. Waters strait of juan de fuca-east
entrance u.S. Waters strait of juan de fuca.

Gale warning until 7 am pst this morning for central u.S. Waters
strait of juan de fuca-east entrance u.S. Waters strait of
juan de fuca.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46121 10 mi42 min 38°F 1014 hPa34°F
TCNW1 - 9446484 - Tacoma, WA 12 mi51 min 36°F 47°F1014.5 hPa
TCMW1 - 9446482 - Tacoma Met, WA 12 mi45 min ESE 2.9 G 4.1
EBSW1 - 9447130 - Seattle, WA 33 mi45 min S 2.9 G 5.1 38°F 45°F1014.4 hPa
WPOW1 - West Point, WA 35 mi33 min S 8 G 9.9 38°F 1014.2 hPa (+1.1)35°F
46120 42 mi42 min W 7.8 38°F 1013.3 hPa36°F

Wind History for Tacoma MET, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fort Lewis / Gray U. S. Army Airfield, WA6 mi95 minS 910.00 miA Few Clouds35°F34°F99%1013.8 hPa
Tacoma / McChord Air Force Base, WA6 mi35 minSW 610.00 miMostly Cloudy34°F33°F100%1014.9 hPa
Tacoma, Tacoma Narrows Airport, WA7 mi40 minN 010.00 miOvercast36°F35°F97%1014.4 hPa
Pierce County-Thun Field, WA17 mi38 minN 010.00 miOvercast36°F35°F100%1014.2 hPa
Olympia, Olympia Airport, WA21 mi39 minSSW 710.00 miMostly Cloudy36°F33°F89%1014.9 hPa
Bremerton, Bremerton National Airport, WA23 mi37 minN 010.00 miMostly Cloudy32°F30°F96%1015.5 hPa
Seattle, Seattle-Tacoma International Airport, WA24 mi40 minSSW 410.00 miOvercast36°F33°F89%1014.8 hPa

Wind History from TCM (wind in knots)
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Last 24hrCalmS6S9S9SW8S10S11S8S10S5SW6SW3S8S11SW8S11S12S11S11S11SW10SW13S7SW6
1 day ago--NE12
G21
NE4NE8N14N8NE12
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NE13NE4CalmS3S3S3S4S4S3CalmCalmS4S4S3S4
2 days agoS3S3SW9--S5W3S3SW3SE5S5S6S4S4CalmCalmCalmCalmNE3CalmN3NE5NE5NE5N13

Tide / Current Tables for Steilacoom, Washington
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Steilacoom
Click for Map
Sat -- 12:49 AM PST     11.49 feet High Tide
Sat -- 02:37 AM PST     Moonset
Sat -- 05:50 AM PST     7.30 feet Low Tide
Sat -- 06:59 AM PST     Sunrise
Sat -- 11:10 AM PST     12.96 feet High Tide
Sat -- 12:05 PM PST     Moonrise
Sat -- 05:48 PM PST     Sunset
Sat -- 06:49 PM PST     0.07 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
11.211.511108.77.67.37.99.210.812.212.912.611.49.46.94.420.50.10.92.85.37.9

Tide / Current Tables for Gibson Point, 0.8 miles E of, Washington Current
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Gibson Point
Click for Map
Sat -- 12:42 AM PST     -0.00 knots Slack
Sat -- 02:37 AM PST     Moonset
Sat -- 03:13 AM PST     -0.89 knots Max Ebb
Sat -- 06:44 AM PST     0.00 knots Slack
Sat -- 06:59 AM PST     Sunrise
Sat -- 09:37 AM PST     1.43 knots Max Flood
Sat -- 11:27 AM PST     -0.01 knots Slack
Sat -- 12:05 PM PST     Moonrise
Sat -- 03:14 PM PST     -1.98 knots Max Ebb
Sat -- 05:48 PM PST     Sunset
Sat -- 07:21 PM PST     0.01 knots Slack
Sat -- 10:40 PM PST     2.54 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.7-0.2-0.7-0.9-0.8-0.6-0.30.20.81.31.30.5-0.4-1.1-1.7-2-1.9-1.5-1-0.30.71.72.42.5

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 (10,2,3,4)
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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.