Saturday, August24, 2019 L-36.com


Marine Weather and Tides
Steilacoom, WA

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:16AMSunset 8:09PM Friday August 23, 2019 9:56 PM PDT (04:56 UTC) Moonrise 11:08PMMoonset 1:31PM Illumination 38% Phase: Third Quarter Moon; Moon at 23 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- 842 Pm Pdt Fri Aug 23 2019
Tonight..N wind 5 to 15 kt becoming S after midnight. Wind waves 2 ft or less.
Sat..S wind to 10 kt becoming nw in the afternoon. Wind waves 1 ft or less. A slight chance of showers.
Sat night..NE wind 10 to 20 kt. Wind waves 1 to 3 ft.
Sun..SE wind to 10 kt in the morning becoming light. Wind waves 1 ft or less.
Sun night..NE wind 5 to 15 kt becoming N to 10 kt after midnight. Wind waves 2 ft or less.
Mon..N wind to 10 kt becoming 5 to 15 kt in the afternoon. Wind waves 2 ft or less.
Mon night..NE wind to 10 kt. Wind waves 1 ft or less.
Tue..N wind to 10 kt. Wind waves 1 ft or less.
Wed..N wind to 10 kt. Wind waves 1 ft or less.
PZZ100 842 Pm Pdt Fri Aug 23 2019
Synopsis for the northern and central washington coastal and inland waters..A weak cold front will dissipate over the coastal waters tonight and Saturday. Otherwise, onshore flow will continue through early next week with high pressure offshore and lower pressure inland. Low level flow will turn offshore on Tuesday as a thermal trough builds north along the west 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 240329
afdsew
area forecast discussion
national weather service seattle wa
830 pm pdt Fri aug 23 2019

Synopsis A trough of low pressure will slowly move across central
bc through the weekend bringing a few showers and near to below
normal temperatures to western washington. The trough will slide
east and high pressure will build in behind it by Sunday and into
early next week. Low level offshore flow will develop by mid week
and produce well above normal temperatures and dry conditions.

Short term tonight through Monday Current radar shows most of
the shower activity that had been in place over portions of W wa
this afternoon and evening... Mainly over skagit and whatcom
counties... Has moved eastward and as such precip over the area has
generally come to an end. The weaker echoes currently present on
radar at the time of this writing are likely low clouds as onshore
flow will continue to keep moisture over the area. This break in the
action is expected to be short-lived though as rain showers should
develop again off the coast late tonight and likely reach the coast
by sunrise on Saturday. There will be a low chance for showers
across the area on Saturday with the greatest chance being over the
olympic peninsula and coast earlier in the day. This activity will
not be significant but the showers and clouds will help to keep
temperatures below normal for many areas on Saturday. The troughing
will be slow to move east and leave the area open for a few more
showers Sunday across the far northern areas closest to canada. But
otherwise it will remain cloudy with highs lingering near normal.

A change in the pattern will take place overnight Sunday and into
Monday. The trough of low pressure will finally exit well east of
the area. This will permit a ridge of mid level high pressure
which has been lingering well south of the area to begin building
north. Heights will rise quite a bit overnight Sunday and into
Monday and so Monday will be a much drier day with temperatures
bumping up about 5 degrees from Sunday to reach near or slightly
above normal. Smr johnson

Long term Tuesday through Friday From previous
discussion... This warming trend will continue through midweek.

Heights will continue to climb and crest in the 585-588dm range.

850mb temps will climb as well to around 18-20c by Tuesday evening
with winds becoming more favorable for supporting low level warmth.

Highs on Tuesday are expected about 10 degrees warmer than Monday,
so should be well above normal with lots of Sun and lower to mid 80s.

Wednesday looks to be the hottest day at present as 850mb temps
crest in the +20 to +23c range with low level offshore flow. This
suggests highs in the mid to upper 80s with readings near 90
possible from seattle to the south for some late summer heat.

Current heat impact levels indicate some impacts for vulnerable
populations but not hot enough for more widespread concerns at
this time. Record highs for seattle on t-w-th are 88,95,91 and so
those appear to be safe.

Thursday looks set to be a cooler day, by at least a few degrees
if not more. Heights fall and 850mb temps do as well. There is
some suggestion of some precip even in the area so the temperature
drop may be even more than current forecasts indicate. At present
have shows the greatest cooling on the coast and a few degrees of
cooling inland but will have to monitor trends in the extended.

Friday at this point looks like it may remain above normal across
the interior so have left forecast highs in the 80s as the details
on breakdown of the warmer pattern looks to be a bit in question.

Aviation Westerly flow aloft will remain over W wa tonight and
into Saturday morning before becoming more northwesterly Saturday
afternoon as an exiting upper level trough continues to move
eastward. Onshore flow will persist near the surface.

Cigs over W wa mostlyVFR at the time of this writing and expected
to stay that way with only mid to high level clouds forecast for
most of the area tonight and into Saturday morning. The exception to
this will likely be hqm and olm... With low level stratus expected to
develop there with the combination of moisture and onshore flow in
place. Mid level clouds will increase late Saturday morning and into
Saturday afternoon with a passing dissipating front.

Ksea...VFR ceilings will continue tonight and through most of the
overnight hours. A few MVFR stratus may move into the vicinity of
the airfield by daybreak Saturday. Winds N NE tonight before veering
s SW by Saturday afternoon. Wind speeds expected to remain under
10kts. Smr

Marine Onshore flow will persist as higher pressure remains
located offshore and lower pressure remains inland... Giving rise to
the potential for small craft advisory level winds in the strait and
portions of the northern inland waters tonight. Obs not bearing this
out just yet... But winds at race rocks starting to get close... So
will continue to monitor but will leave inherited headlines in place
for evening forecast issuance.

Winds will ease across these waters Saturday morning tho there
could be an observation or two of small craft winds in the strait
between 12-18z . Onshore flow will continue with little change in
the synoptic pattern, although a weak front will cross the local
area. In its wake, a stronger westerly push down the strait is
possible. Winds in latest guidance are capped at 30kts or below so
will hold off on a gale watch but the evening and midnight shifts
may need to issue if gradients continue to look strong.

Onshore flow looks to continue through Monday before shifting to
offshore as a thermal trough builds north from california. The
offshore flow pattern may then last thru much of the week.

Smr kovacik

Hydrology The daily hydrology discussion has ended until the
start of the next rainy season; it will only be updated as needed
until then.

Sew watches warnings advisories
Wa... None.

Pz... 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-northern inland waters including the
san juan islands.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46121 10 mi38 min 65°F 1013.3 hPa56°F
TCMW1 - 9446482 - Tacoma Met, WA 12 mi62 min NNW 8.9 G 11
TCNW1 - 9446484 - Tacoma, WA 12 mi62 min 63°F 56°F1013.8 hPa
WPOW1 - West Point, WA 35 mi56 min NE 5.1 G 6 58°F 1013.7 hPa (-0.0)55°F
46120 42 mi45 min N 1.9 60°F 1012.4 hPa55°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 mi2 hrsN 510.00 miMostly Cloudy70°F59°F69%1012.8 hPa
Tacoma / McChord Air Force Base, WA6 mi2 hrsNNE 810.00 miMostly Cloudy67°F57°F72%1012.9 hPa
Tacoma, Tacoma Narrows Airport, WA7 mi3.1 hrsNNE 510.00 miFair65°F53°F66%1012.8 hPa
Pierce County-Thun Field, WA17 mi2.7 hrsN 010.00 miFair70°F57°F64%1012.9 hPa
Olympia, Olympia Airport, WA21 mi3 hrsNE 310.00 miFair72°F53°F52%1012.3 hPa
Bremerton, Bremerton National Airport, WA23 mi3 hrsNE 610.00 miFair66°F55°F68%1014.7 hPa
Seattle, Seattle-Tacoma International Airport, WA24 mi3.1 hrsNNW 910.00 miOvercast69°F52°F55%1013.6 hPa

Link to 5 minute data for KGRF

Wind History from GRF (wind in knots)
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Last 24hrCalmCalmSE4SE4SE3SE4SE3SE3SE3SE3CalmCalmCalmCalmNW7NE5N6N5N4W3NW5N4N5N6
1 day agoW6CalmS5S9S6S4SE4S5CalmSE5S4S4SW3CalmCalmNW3CalmCalmCalmCalmW7W4W3Calm
2 days agoSW4SE5SE3CalmNE3CalmCalmE3W4CalmSE4CalmN3SW4SW4SE3E4SE4S4SW5S4S7SE5S6

Tide / Current Tables for Steilacoom, Washington
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Steilacoom
Click for Map
Sat -- 12:07 AM PDT     Moonrise
Sat -- 06:18 AM PDT     Sunrise
Sat -- 06:55 AM PDT     1.23 feet Low Tide
Sat -- 02:06 PM PDT     10.65 feet High Tide
Sat -- 03:38 PM PDT     Moonset
Sat -- 07:00 PM PDT     7.15 feet Low Tide
Sat -- 08:05 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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11.9119.37.35.13.11.71.21.93.35.27.39.110.310.610.49.68.57.67.27.68.69.911.1

Tide / Current Tables for Gibson Point, 0.8 miles E of, Washington Current
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Gibson Point
Click for Map
Sat -- 12:07 AM PDT     Moonrise
Sat -- 03:19 AM PDT     -1.64 knots Max Ebb
Sat -- 06:18 AM PDT     Sunrise
Sat -- 07:28 AM PDT     0.00 knots Slack
Sat -- 10:44 AM PDT     2.05 knots Max Flood
Sat -- 01:53 PM PDT     -0.00 knots Slack
Sat -- 03:38 PM PDT     Moonset
Sat -- 04:19 PM PDT     -0.70 knots Max Ebb
Sat -- 07:55 PM PDT     0.00 knots Slack
Sat -- 08:05 PM PDT     Sunset
Sat -- 10:45 PM PDT     1.17 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.2-0.8-1.3-1.6-1.6-1.3-0.8-0.30.41.31.921.50.7-0.1-0.5-0.7-0.7-0.5-0.300.611.1

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 (0,6,7,8)
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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.