Sunday, August25, 2019 L-36.com


Marine Weather and Tides
Carbonado, WA

Version 3.4
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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 6:17AMSunset 8:04PM Sunday August 25, 2019 9:16 AM PDT (16:16 UTC) Moonrise 12:00AMMoonset 3:41PM Illumination 24% Phase: Waning Crescent; Moon at 25 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- 846 Am Pdt Sun Aug 25 2019
Today..S wind to 10 kt in the morning becoming light. Wind waves 1 ft or less.
Tonight..N wind to 10 kt becoming ne after midnight. Wind waves 2 ft or less.
Mon..N wind to 10 kt rising to 10 to 20 kt in the afternoon. Wind waves 1 ft or less building to 1 to 3 ft in the afternoon.
Mon night..N wind 5 to 15 kt in the evening becoming light. Wind waves 2 ft or less.
Tue..Light wind becoming N to 10 kt in the afternoon. Wind waves 1 ft or less.
Tue night..N wind to 10 kt in the evening becoming light. Wind waves 1 ft or less.
Wed..N wind to 10 kt. Wind waves 1 ft or less.
Thu..Light wind becoming sw to 10 kt. Wind waves 1 ft or less.
PZZ100 846 Am Pdt Sun Aug 25 2019
Synopsis for the northern and central washington coastal and inland waters..Onshore flow will continue through Monday before turning offshore on Tuesday as a thermal trough builds north along the west coast.


7 Day Forecast for Marine Location Near Carbonado, WA
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location: 47.04, -122.07     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 251600
afdsew
area forecast discussion
national weather service seattle wa
900 am pdt Sun aug 25 2019

Update Northwesterly flow aloft this morning extends from the
northern pacific into the pacific northwest, with 100kt+ jet
streak nosing into the region. At the surface, a large area of high
pressure remains centered across the northern pacific with weak
trough noted across far eastern washington, allowing for onshore
low level flow.

Within the NW flow aloft this morning, a shortwave trough is seen
skirting the northern counties of washington. Most of the deeper
layer moisture and bulk of the larger scale lift exists to the
north and east of the area across southern bc into the id
panhandle and western montana, where best shower activity is seen
in mrms radar imagery. Nevertheless, local radar imagery from katx
is picking up a few light echoes across skagit and whatcom
counties, which is where best shortwave influence would exist.

Have added slight chance showers to this area this morning to
account for current activity. These showers will not amount to
much and are likely to fizzle out in the next few hours. Elsewhere
conditions are mostly cloudy, tho a few spots across the olympic
peninsula are already clear.

Mid level heights will rise thru the day today and skies will
clear as a ridge of high pressure across the pacific well
offshore the southern oregon and california coasts begins to
slowly build north into the northern pacific and pacific
northwest. Low level flow will continue to be onshore as sfc high
pressure remains locked across the pacific. Should be a nice day
with highs in the 60s along the coast and mountains and low to
mid 70s interior.

Forecast is largely on track this morning so aside from slight
adjustment to morning pops, the previous forecast has been left as
is. Previous discussion can be referenced below with updated
marine and aviation sections.

Kovacik

Prev discussion issued 327 am pdt Sun aug 25 2019

Synopsis Upper level ridge offshore slowly building today as
an upper level trough moves east of the area. The ridge will
continue to build, moving inland on Tuesday and remaining in place
into next weekend. The ridge will weaken somewhat on Thursday. Low
level flow turning offshore later Monday with the strongest
offshore flow Tuesday into early Wednesday. Low level flow
turning back onshore Thursday.

Short term today through Tuesday Satellite imagery shows
mostly cloudy skies over most of the area at 3 am 10z with a break
in the cloud cover from the central coast southeast into cowlitz
county. Temperatures at 3 am were in the mid 50s to lower 60s.

Pretty "normal" late august day on tap for western washington
today. Upper level trough well east of the area this afternoon
with weak upper level ridging developing over the area. In the
lower levels light onshore flow. Marine layer is shallow and with
the low level flow trending toward neutral there will be no
reinforcement of the marine layer. End result plenty of afternoon
sunshine after the morning cloud cover. Temperatures near normal,
mid 60s to mid 70s.

Upper level ridge offshore continuing to build and move east
tonight into Monday. Surface gradients going northwesterly
overnight which does not bode well for morning stratus on Monday
for the interior. Temperatures aloft warming and by 00z Tuesday
500 mb heights in the mid 580 dms. Afternoon seabreezes will put
a cap on the high temperatures near the water but even with the
seabreezes most places a few degrees warmer Monday with highs in
the 70s. Lows tonight in the 50s.

Upper level ridge moving over western washington Monday night into
Tuesday with the low level flow turning offshore. Winds aloft in
the lower levels also turning offshore but not very strong, 850 mb
winds easterly less than 10 knots. Temperatures aloft continuing
to warm with 850 mb temps around plus 20c by 00z Wednesday. All
this adds up to much warmer temperatures on Tuesday with highs in
the 80s even along the coast. Warmest locations will be near 90.

Long term Wednesday through Saturday Extended models in good
agreement with upper level ridge over western washington and low
level offshore flow weakening on Wednesday. Right now it looks
like the high temperatures will peak Wednesday for the interior
with a little cooling along the coast with the lack of offshore
flow allowing afternoon seabreezes to kick in. Highs in the
interior from the upper 70 to lower 90s with highs cooling back
down into the 70s along the coast. Upper level ridge weakening on
Thursday with temperatures aloft cooling and the low level flow
going light onshore. Weak surface low off the coast preventing a
stronger onshore flow scenario from developing. The weak marine
push Thursday will drop high temperatures up to 5 degrees with mid
70s to mid 80s for the interior and lower to mid 70s for the
coast. Weak surface low off the coast will continue to put a
damper on the low level onshore flow Friday. 00z model runs are
much slower with the approach of the next upper level trough
next weekend. The slower approach actually pumps the upper level
ridge back up a bit over the area. Low level flow remaining weakly
onshore Saturday as well. With the lack of any significant low
level onshore flow will stay on the warm side of guidance for the
high temperatures Friday and Saturday, in the 70s to lower 80s.

Will also take the chance of showers out of the forecast for
Saturday with the slower approach of the upper level trough.

Felton

Aviation Northwesterly flow aloft as an upper level trough
departs the pacific northwest. Onshore flow at the surface.

Generally a mix ofVFR to MVFR this morning with marine stratus.

ExpectVFR for all by late this morning into early this afternoon as
upper level ridging builds over the area. Winds generally light
becoming northerly later this afternoon.

Ksea...VFR CIGS this morning with MVFR possible briefly until 18z-
19z.VFR this afternoon. NE winds becoming SW this afternoon
becoming northerly this evening. Winds 4-8 knots. Jd

Marine Onshore flow continues into Monday. Winds will gradually
weaken this morning. Another round of small craft advisory winds
through the strait possible this evening but for now have forecast
just under criteria and will monitor latest data this afternoon.

Offshore flow returns on Tuesday and will persist through much of
the week. Jd

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... None.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TCNW1 - 9446484 - Tacoma, WA 24 mi52 min 60°F 57°F1021.6 hPa
TCMW1 - 9446482 - Tacoma Met, WA 25 mi52 min SW 4.1 G 6
46121 39 mi35 min 59°F 1021.6 hPa57°F
WPOW1 - West Point, WA 47 mi76 min N 1.9 G 2.9 58°F 1021.1 hPa (+2.1)55°F

Wind History for Tacoma MET, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pierce County-Thun Field, WA12 mi21 minN 010.00 miOvercast63°F55°F77%1021.7 hPa
Tacoma / McChord Air Force Base, WA23 mi78 minWSW 410.00 miOvercast59°F56°F92%1021.6 hPa

Link to 5 minute data for KPLU

Wind History from PLU (wind in knots)
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Last 24hrCalm444
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1 day agoCalmCalmCalm4
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4Calm43CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
2 days agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for Tacoma, Commencement Bay, Washington
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Tacoma
Click for Map
Sun -- 12:46 AM PDT     Moonrise
Sun -- 06:19 AM PDT     Sunrise
Sun -- 07:17 AM PDT     0.47 feet Low Tide
Sun -- 02:55 PM PDT     9.94 feet High Tide
Sun -- 04:43 PM PDT     Moonset
Sun -- 07:41 PM PDT     7.30 feet Low Tide
Sun -- 08:03 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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10.29.68.46.74.72.81.30.50.71.83.45.47.48.99.79.99.68.98.17.47.37.88.59.4

Tide / Current Tables for Des Moines, Washington
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Des Moines
Click for Map
Sun -- 12:45 AM PDT     Moonrise
Sun -- 06:18 AM PDT     Sunrise
Sun -- 07:17 AM PDT     0.47 feet Low Tide
Sun -- 02:53 PM PDT     9.84 feet High Tide
Sun -- 04:43 PM PDT     Moonset
Sun -- 07:41 PM PDT     7.30 feet Low Tide
Sun -- 08:03 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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10.19.58.36.64.62.81.20.50.71.83.45.47.38.89.69.89.58.987.47.37.78.59.4

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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Seattle, WA (12,3,4,5)
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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.