Friday, September21, 2018 L-36.com


Marine Weather and Tides
Steilacoom, WA

Version 3.4
What's New / NOTES
9/17/2018 XTide broke when 1and1 "upgraded" my server. It has been esculated. I am sorry for the problem.

Sunrise 6:55AMSunset 7:09PM Friday September 21, 2018 8:42 AM PDT (15:42 UTC) Moonrise 5:04PMMoonset 2:11AM Illumination 89% Phase: Waxing Gibbous; Moon at 12 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- 329 Am Pdt Fri Sep 21 2018
.small craft advisory in effect through late tonight...
Today..S wind 15 to 25 kt. Wind waves 2 to 4 ft. A slight chance of rain in the afternoon.
Tonight..S wind 15 to 25 kt. Wind waves 2 to 4 ft. Rain in the evening then rain likely after midnight.
Sat..SW wind 10 to 20 kt. Wind waves 1 to 3 ft. A slight chance of showers in the morning then a chance of showers in the afternoon.
Sat night..NW wind 5 to 15 kt becoming S after midnight. Wind waves 2 ft or less.
Sun..SW wind to 10 kt in the morning becoming light. Wind waves 1 ft or less in the morning becoming less than 1 ft.
Sun night..Light wind. Wind waves less than 1 ft.
Mon..Light wind becoming N to 10 kt. Wind waves 1 ft or less.
Tue..Light wind. Wind waves 1 ft or less.
PZZ100 329 Am Pdt Fri Sep 21 2018
Synopsis for the northern and central washington coastal and inland waters..Southerly small craft advisory winds will affect most of the waters today ahead of the next front. Onshore flow will develop tonight and Saturday as this system moves inland with more widespread small craft advisory winds possible. The flow will turn offshore early next week as a thermal trough forms along the coast.


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 211512
afdsew
area forecast discussion
national weather service seattle wa
812 am pdt Fri sep 21 2018

Synopsis A slow moving cold front will move onto the coast late
this afternoon and inland tonight bringing some rain to the area.

Post frontal onshore flow on Saturday will result in a cool,
showery, and breezy day. Showers will diminish on Sunday as high
pressure moves into the area. A strong upper level ridge will
build over the area next week giving a spell of dry weather. The
warmest days are expected with the strongest low level offshore
flow during the middle to end of the week.

Short term The warm front that brought some precipitation,
mainly to the northern two thirds of the olympic peninsula and to
the interior north of everett, has moved northward into british
columbia. A frontal system wrapping around a 1005 mb low centered
near 48n 132w has is moving slowly eastward through the offshore
waters. Area radars are just starting to pick up on the rain
shield east of the frontal system. This rain will move onshore
during the afternoon hours today. Despite mostly cloudy conditions
today, the interior will remain in the warm sector today.

Temperatures are starting off quite mild, in the mid 50s to lower
60s, so many areas will rise into the upper 60s to mid 70s by 2
pm. Strengthening flow aloft interacting with the olympics will
produce a weak mesolow to the northeast of the olympic peninsula
that will result in locally breezy conditions near the puget sound
today.

The offshore cold front will move onto the coast early this
evening and into the interior overnight. Expect rain to begin in
the interior around and east of the i-5 corridor by the tail end
of the evening commute. Breezy conditions will occur ahead of the
front and will continue behind the front late tonight as n-s
pressure gradients increase.

The remnants of the offshore low will move eastward just to the
north of the canadian border Saturday. The remnants of a weak
bent-back occlusion wrapping around the offshore low combined with
moderate to tight southerly pressure gradients will keep showers
and breezy conditions going through the day. Showers will
gradually decrease and become confined to the terrain and a
possible convergence zone by later in the day into Saturday night
and Sunday as high pressure builds into the area and onshore flow
relaxes.

Current forecasts are in good shape. Only minor updates have been
made to the winds. Albrecht

Long term From the previous long term discussion: extended
models in good agreement with the upper level ridge offshore
building Monday and Tuesday then slowly weakening through the end
of the week. Surface gradients northwesterly on Monday and Tuesday
turn offshore Wednesday and Thursday. Will not be surprised if
the warmest high temperatures in the middle of the week are along
the coast. Before the offshore flow develops will have to keep an
eye out for the possibility of some morning fog with light
gradients especially Monday morning ( yes, it's that time of year
again ). Highs on Monday and Tuesday in the mid 60s to lower to
mid 70s warming to the upper 60s and 70s for Wednesday and
Thursday. Lows will be on the cool side with the colder locations
getting down into the upper 30s with most places in the 40s and
the urban locations remaining in the lower 50s. Felton

Aviation A warm front will shift north of the area today. A
cold front will move onshore tonight. Westerly flow aloft will
become southerly later today and tonight. The air mass is moist
and stable.

Areas of MVFR ceilings should lift to mostlyVFR today as a warm
front moves out of the area. Ceilings will lower to MVFR most
areas again tonight as a cold front moves onshore.

Ksea...VFR low clouds should lift to a mid level deck later today.

Clouds might even scatter at times this afternoon. MVFR low
ceilings are expected to develop again tonight as a cold front
moves through. Southerly wind 5-10 knots will increase to 10-15
knots and become gusty this afternoon and evening. Schneider

Marine A warm front will lift north of the area today. There
will be a bit of a lull in the winds into this afternoon in the
wake of the warm front. A cold front will move through the area
tonight brining another round of fairly widespread southerly
small craft advisory strength winds.

Onshore flow will develop behind the front later tonight and
Saturday then ease on Sunday. Low level flow will turn northerly
or offshore early next week as a thermal trough builds north along
the coast. Schneider

Sew watches warnings advisories
Wa... None.

Pz... Small craft advisory until 5 am 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-west
entrance u.S. Waters strait of juan de fuca.

Small craft advisory from 5 pm this afternoon to 5 am pdt Sunday
for east entrance u.S. Waters strait of juan de fuca.

Small craft advisory from 5 pm this afternoon to 5 pm pdt
Saturday for northern inland waters including the san juan
islands.

Small craft advisory from 5 pm this afternoon to 5 am pdt
Saturday for admiralty inlet.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TCNW1 - 9446484 - Tacoma, WA 12 mi49 min 60°F 56°F1016.2 hPa
TCMW1 - 9446482 - Tacoma Met, WA 12 mi49 min SE 5.1 G 6
EBSW1 - 9447130 - Seattle, WA 33 mi43 min SE 7 G 11 61°F 56°F1015.4 hPa (-0.6)
WPOW1 - West Point, WA 35 mi43 min S 12 G 13 58°F 1015.6 hPa (-0.0)52°F

Wind History for Tacoma MET, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Tacoma / McChord Air Force Base, WA6 mi1.7 hrsESE 310.00 miOvercast54°F53°F100%1017.6 hPa
Tacoma, Tacoma Narrows Airport, WA7 mi1.8 hrsS 510.00 miOvercast56°F48°F77%1016 hPa
Pierce County-Thun Field, WA17 mi1.8 hrsN 010.00 miFair54°F53°F100%1016.6 hPa
Olympia, Olympia Airport, WA21 mi1.8 hrsSW 510.00 miOvercast54°F48°F80%1016.4 hPa
Bremerton, Bremerton National Airport, WA23 mi1.8 hrsS 810.00 miOvercast56°F48°F77%1017.6 hPa
Seattle, Seattle-Tacoma International Airport, WA24 mi1.8 hrsSE 910.00 miMostly Cloudy59°F50°F72%1016.8 hPa

Wind History from TCM (wind in knots)
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Last 24hr----------------------------------------------SE3
1 day ago------------------------------------------------
2 days ago------------------------------------------------

Tide / Current Tables for Steilacoom, Washington
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Gibson Point, 0.8 miles E of, Washington Current
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Tide / Current data from XTide NOT FOR NAVIGATION
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Weather Map and Satellite Images
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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 (11,2,3,4)
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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.