Monday, January22, 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 7:43AMSunset 5:00PM Monday January 22, 2018 2:18 AM PST (10:18 UTC) Moonrise 10:38AMMoonset 10:59PM Illumination 31% 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- 843 Pm Pst Sun Jan 21 2018
.small craft advisory in effect through Monday morning...
Tonight..S wind 15 to 25 kt. Wind waves 2 to 4 ft. Showers likely.
Mon..S wind 15 to 25 kt easing to 5 to 15 kt in the afternoon. Wind waves 2 to 4 ft subsiding to 2 ft or less in the afternoon. Showers likely.
Mon night..S wind 5 to 15 kt. Wind waves 2 ft or less. A slight chance of showers.
Tue..SE wind 5 to 15 kt becoming 10 to 20 kt in the afternoon. Wind waves 1 to 3 ft.
Tue night..S wind 5 to 15 kt. Wind waves 2 ft or less.
Wed..S wind 5 to 15 kt becoming 10 to 20 kt in the afternoon. Wind waves 1 to 3 ft.
Wed night..S wind 10 to 20 kt rising to 15 to 25 kt after midnight. Wind waves 2 to 4 ft.
Thu..S wind 15 to 25 kt. Wind waves 2 to 4 ft.
Fri..S wind 5 to 15 kt rising to 15 to 25 kt. Wind waves 2 ft or less building to 2 to 4 ft.
PZZ100 843 Pm Pst Sun Jan 21 2018
Synopsis for the northern and central washington coastal and inland waters..Moderate southerly onshore flow will persist tonight, then ease on Monday. A warm front on Tuesday will give strong east to southeast gradients with gales possible over the coastal waters and at the east entrance to the strait of juan de fuca. A weakening low center will reach the waters off vancouver island on Thursday. A lull between systems is possible on Friday.

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 220525
afdsew
area forecast discussion
national weather service seattle wa
900 pm pst Sun jan 21 2018

Synopsis A cool upper trough will maintain showers tonight with
snow at times in the mountains. After a lull on Monday, another
front will cross western washington Tuesday night and Wednesday. A
cool showery upper trough will reach the area Thursday.

Short term An upper trough with -34c cold pool at 500 mb
will slowly shift east across the region through Monday morning.

Radar indicates showers still streaming into WRN wa, although
partial shadowing is limiting showers east northeast of the
olympics. The airmass is somewhat unstable with some occasional
lightning strikes with cells, mainly near the coast. Another
embedded short wave is shown by models to move across tonight,
enhancing showers and producing periods of heavy snow in the
cascades. Cold top cumulus on IR imagery extend well offshore so
expect precipitation to increase and persist through Monday morning.

A couple feet of snow has fallen at mount baker with generally less
6 inches in the passes. The increase in showers tonight with the
coldest air aloft could easily drop up to 6 inches including the
passes tonight. The winter storm warning for the north
cascades olympics and advisory for remaining cascades will remain in
effect through Monday morning. Showers will decrease in the
afternoon as cyclonic flow shifts east of the region.

Besides decreasing showers and mountain snow, no other significant
weather expected Monday. A lull or break in precipitation is
expected Monday afternoon and night. Some partial sunshine is
possible with temperatures in the 40s.

The next system arrives Tuesday and may affect the region through at
least Wednesday. Another round of wind and mountain snow lowland
rain appear likely. Gradients will have a strong easterly component
which will limit the stronger winds to portions of the north
interior and possibly the coast. High wind criteria will be harder
to hit with this next front as it stretches out. Winds will probably
warrant an advisory at some point around Tuesday Tuesday night. Most
of puget sound southward will be breezy, much like this past system.

Mercer

Long term Previous discussion... A cool upper level trough will
cross the pac NW Wednesday night into Thursday. This system is deep
with 500 mb heights in the 520s and temps -30c. The cooler air mass
will knock snow levels down to around 1,000-1,500 feet with a chance
of snow showers on the higher hills. The surface flow is southerly,
though, which should moderate temps. Heavy snow is expected in the
mountains. Toward the weekend, a strong warm front may bring heavy
rain to the coast and mountains. However, this front is wavering
between southern b.C. And western wa in the models for a wide range
in qpf. 33

Aviation A broad upper level trough will move eastward across
the area tonight and will be followed by a flat upper level ridge
Monday into Monday night. Moderate westerly flow. The air mass is
somewhat unstable this evening and will stabilize later tonight
through Monday evening.

An band of showers sits from the olympic peninsula southwestward
into the oregon offshore waters this evening. This shower band is
expected to shift eastward into the interior early Monday morning.

Cigs across the area are a mixed bag with most of the major
terminals seeing MVFR conditions. Expect ceilings to lower somewhat
early Monday morning as the shower band passes through, then
conditions will improve Monday as showers become confined to the
terrain. Isolated thunderstorms have been observed on the
northwestern olympic peninsula this evening. Expect the threat of
additional TSTM activity to decrease rapidly as the air mass
stabilizes. Albrecht
ksea... Expect a general break in showers until about 10z when the
next bend now over the olympic peninsula moves into the area. Cigs
will generally be in the MVFR category (fl025-030) through Monday
morning, with a possible drop to fl015-020 12z-16z with the showers.

South flow 6-10 kt through Monday evening. Albrecht

Marine Moderate southerly onshore flow tonight will gradually
decrease on Monday. Small craft advisories continue across most of
the waters tonight into Monday morning with the breezy onshore flow.

Small craft advisories will continue over the coastal waters into
Monday evening as seas only slowly subside and remain hazardous to
small craft.

A strong warm front will lift northeast across the waters on
Tuesday. Expect possible gale southeasterly flow to develop late
Monday night over the coastal waters -so a gale watch is being
issued for the coastal waters late Monday night into Tuesday. A gale
watch may also be needed for the eastern entrance to the strait of
juan de fuca, but confidence is lower in that area.

A weakening low center will reach the waters off vancouver island on
Thursday. While gales are a possibility over the coastal waters with
this system, there is better threat that seas to the south of this
low will reach the coastal waters at 20-25 ft on Thursday.

Another strong warm front will increase southeast flow over the
waters Friday night and Saturday. Albrecht

Hydrology The skokomish river in mason county rose above flood
stage around midday today with minor flooding occuring. The river
appears to be cresting around 9 pm pst, and should slowly fall
through Monday morning. See the latest flood statement for current
information.

Rainfall through tonight will probably push the USGS landslide
indices close to thresholds for shallow landslides.

Models are showing heavy rain possible in the olympics and
cascades next weekend from a strong warm front. Exact impacts are
unclear as the front may waver between southern b.C. And western
wa.

Sew watches warnings advisories
Wa... Winter weather advisory until 9 am pst Monday for cascades of
pierce and lewis counties-cascades of snohomish and king
counties.

Winter storm warning until 9 am pst Monday for cascades of
whatcom and skagit counties-olympics.

Pz... Gale watch from late Monday night through Tuesday afternoon 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 Monday night 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 for rough bar until 4 am pst Tuesday for
grays harbor bar.

Small craft advisory until 3 am pst Monday for central u.S.

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

Small craft advisory until 9 am pst Monday for admiralty inlet-
northern inland waters including the san juan islands-puget
sound and hood canal.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TCNW1 - 9446484 - Tacoma, WA 12 mi49 min 43°F 48°F1019.1 hPa
TCMW1 - 9446482 - Tacoma Met, WA 12 mi49 min S 5.1 G 7
EBSW1 - 9447130 - Seattle, WA 33 mi49 min S 8.9 G 19 45°F 48°F1018.8 hPa
WPOW1 - West Point, WA 35 mi79 min S 20 G 21 45°F 1017.9 hPa (+1.9)40°F
46120 42 mi48 min W 16 45°F 1017.8 hPa42°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 mi21 minSSE 810.00 miLight Rain42°F41°F99%1019.1 hPa
Tacoma / McChord Air Force Base, WA6 mi21 minS 1110.00 miOvercast41°F41°F100%1019.1 hPa
Tacoma, Tacoma Narrows Airport, WA7 mi26 minWSW 56.00 miLight Rain Fog/Mist41°F41°F100%1019 hPa
Pierce County-Thun Field, WA17 mi24 minS 59.00 miLight Drizzle43°F39°F87%1019 hPa
Olympia, Olympia Airport, WA21 mi25 minSW 69.00 miLight Rain42°F41°F96%1019.1 hPa
Bremerton, Bremerton National Airport, WA23 mi23 minS 710.00 miLight Rain39°F37°F96%1019.8 hPa
Seattle, Seattle-Tacoma International Airport, WA24 mi26 minSSW 67.00 miLight Rain42°F39°F92%1019.3 hPa

Wind History from TCM (wind in knots)
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Last 24hrS10SE13SE12S11
G20
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SW12S19
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S13S10S8S10S9S8S6S7S7SW4S11
1 day agoS7S6S9S4S8S6S7S7S8S7S9S7S12S5S10S11S10S9S10S11
G18
S14S13S11S14
2 days agoS3S3S6S4S7SE4S6S7S15S14S13
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SW11SW11
G17
S10S12S9

Tide / Current Tables for Steilacoom, Washington
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Steilacoom
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Mon -- 02:26 AM PST     1.47 feet Low Tide
Mon -- 07:46 AM PST     Sunrise
Mon -- 09:12 AM PST     14.69 feet High Tide
Mon -- 10:38 AM PST     Moonrise
Mon -- 03:42 PM PST     4.69 feet Low Tide
Mon -- 04:57 PM PST     Sunset
Mon -- 08:53 PM PST     10.43 feet High Tide
Mon -- 10:59 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.72.71.61.73.25.88.811.613.714.714.312.910.98.56.454.75.67.28.81010.49.98.5

Tide / Current Tables for Gibson Point, 0.8 miles E of, Washington Current
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Gibson Point
Click for Map
Mon -- 03:20 AM PST     0.00 knots Slack
Mon -- 06:51 AM PST     2.74 knots Max Flood
Mon -- 07:46 AM PST     Sunrise
Mon -- 09:38 AM PST     -0.00 knots Slack
Mon -- 10:38 AM PST     Moonrise
Mon -- 12:35 PM PST     -1.55 knots Max Ebb
Mon -- 04:27 PM PST     0.00 knots Slack
Mon -- 04:57 PM PST     Sunset
Mon -- 07:13 PM PST     1.63 knots Max Flood
Mon -- 09:11 PM PST     -0.00 knots Slack
Mon -- 10:59 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.8-1.5-0.9-0.30.61.72.52.72.10.8-0.3-1-1.5-1.5-1.3-0.9-0.30.41.21.61.30.2-0.6-1.2

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 (5,6,7,8)
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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.