Monday, August19, 2019 L-36.com


Marine Weather and Tides
Issaquah, WA

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7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
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Sunrise 6:08AMSunset 8:15PM Monday August 19, 2019 7:54 PM PDT (02:54 UTC) Moonrise 9:21PMMoonset 9:10AM Illumination 80% Phase: Waning Gibbous; Moon at 19 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- 251 Pm Pdt Mon Aug 19 2019
Tonight..N wind to 10 kt. Wind waves 1 ft or less.
Tue..Light wind becoming S 5 to 15 kt in the afternoon. Wind waves 2 ft or less.
Tue night..SW wind 5 to 15 kt becoming S 10 to 20 kt after midnight. Wind waves 1 to 3 ft. A slight chance of rain after midnight.
Wed..S wind 10 to 20 kt. Wind waves 1 to 3 ft.
Wed night..NW wind to 10 kt becoming se after midnight. Wind waves 1 ft or less.
Thu..Light wind becoming N to 10 kt in the afternoon. Wind waves 1 ft or less.
Thu night..N wind to 10 kt. Wind waves 1 ft or less.
Fri..Light wind becoming N to 10 kt. Wind waves 1 ft or less.
Sat..S wind to 10 kt becoming nw. Wind waves 1 ft or less.
PZZ100 251 Pm Pdt Mon Aug 19 2019
Synopsis for the northern and central washington coastal and inland waters..Weak low level onshore flow tonight becoming southerly and increasing Tuesday a front approaches the waters. The front will move through on Wednesday. High pressure will build over the coastal waters behind the front Thursday. A weaker front will move by to the north later Friday.


7 Day Forecast for Marine Location Near Issaquah, WA
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location: 47.54, -122.02     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 192145
afdsew
area forecast discussion
national weather service seattle wa
245 pm pdt Mon aug 19 2019

Synopsis
A warming trend will take place through Tuesday across the region
as a ridge of high pressure builds in. This will be brief as a
trough of low pressure pushes in from the pacific into central bc
and provides cooler temperatures and rain across the region
through Wednesday night. A weak high pressure will build back into
the region for the late week with temperatures near normal. There
may be a few showers around on Saturday, but otherwise it will be
a mainly dry stretch of weather to close out this week.

Short term tonight through Thursday
Clouds have been slow and stubborn to fully dissipate, although
most areas have at least developed Sun breaks at this time and
many areas have become mostly sunny. Temperatures are running from
near to slightly below normal at this hour with 60s and lower 70s
across the area. A mid level trough of low pressure will slide
northeast out of the pacific from later tonight into Tuesday.

Ahead of the system, increasing 500mb heights across western
washington will set the stage for a warmup tomorrow. Highs will be
a good 5-10 degrees warmer than today, with many low 80s
developing. Skies will be sunnier as well, but should steadily
cloud up from west to east in advance of this approaching system.

The system will bring rain to the coast by early Wednesday
morning and spread steadily east through the afternoon hours.

Heaviest rain totals will be on the olympic peninsula to the coast
with lighter amounts farther east. Temperatures will remain
mainly in the 60s on Wednesday with the clouds and showers. While
this system has plenty of moisture, it looks to remain progressive
as the trough axis crosses the area by late Wednesday afternoon
and conditions become just showery overnight Wednesday with
chances diminishing by daybreak Thursday.

Heights remain relatively high on Thursday and even begin to
increase again as a strong ridge over the eastern pacific builds
south of the area. The ridge will not make too much northern
progression this week however as a trough well to the north will
hold it at bay and keep more of a flat ridge or zonal flow in
place. This will mean Thursday should be near normal with
decreasing cloudiness.

Long term Friday through Monday
For the extended portion of the forecast, the zonal flow will
continue with a strong mid level ridge staying well south of the
area. Some indication of possible showers on Saturday but the
bulk of the system should remain north and so will include only
small chances of rain on Saturday. Either way, temperatures will
linger around normal through the weekend, in the upper 60s and
lower 70s. By early next week the focus will begin to shift on
northward expansion of the strong ridge to our south. This may set
the stage for an eventual return to hot weather to close out
august. Although this is a little past the current forecast
period, it is worth noting that CPC highlights the area for a risk
of excessive heat the last few days of the month. Will have to
continue to monitor this possibility but there is a lot of time
between now and then where the forecast may change.

Aviation Light low level flow into Tuesday morning. Westerly flow
aloft becoming southwesterly tonight and Tuesday.

Clouds continue to thin over much of the area this afternoon
although a lingering patch of stratus remains over portions of the
coast. Otherwise... All obs are indicating widespreadVFR conditions.

Given weak low level flow expected tonight and into Tuesday
morning... Extent of marine stratus will be limited to the coast
including hqm... Possibly extending to olm. The remainder of W wa
should see clear skies starting tonight and continuing into Tuesday.

Ksea...VFR conditions with continued gradual improvement as clouds
continue to scatter. Clear skies expected overnight. Southwest winds
will become northerly around 00z. Wind speeds will be generally
around 5 knots. Smr

Marine Light low level flow tonight becoming southerly and
increasing Tuesday as a front approaches the waters. The well
organized front will move through Wednesday with small craft
advisory southerlies still expected to occur ahead of the front over
the coastal waters, entrances to the strait of juan de fuca and
northern inland waters and post frontal small craft westerlies in
the strait. Models remain consistent in this feature... But as these
wind speeds still fall in the third period... Will leave headlines to
future shifts. High pressure will build over the coastal waters
behind the front Thursday. A weaker front will move by to the north
later Friday. Smr

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
WPOW1 - West Point, WA 24 mi54 min NE 6 G 6 62°F 1015.5 hPa (-1.0)56°F
46120 25 mi41 min N 3.9 64°F 1014 hPa54°F
TCMW1 - 9446482 - Tacoma Met, WA 28 mi60 min N 8.9 G 11
TCNW1 - 9446484 - Tacoma, WA 28 mi60 min 73°F 56°F1015.2 hPa
46121 42 mi37 min 71°F 1014.5 hPa56°F

Wind History for Seattle, Puget Sound, WA, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Renton Municipal Airport, WA11 mi2 hrsNNW 75.00 miFair75°F53°F46%1015.6 hPa
Boeing Field - King County International Airport, WA15 mi2 hrsWNW 810.00 miFair73°F51°F46%1015.3 hPa
Seattle, Seattle-Tacoma International Airport, WA17 mi2 hrsNW 710.00 miA Few Clouds74°F52°F46%1016.1 hPa

Link to 5 minute data for KRNT

Wind History from RNT (wind in knots)
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Last 24hrSW7CalmW4--3----S4S4S5S3S6--S5S444--5N8N5N7N7NW7
1 day agoSW3SW3CalmCalmS3--SW3S3CalmS3----CalmCalmNW53CalmN6N5N4N5N5--5
2 days agoSW5--Calm--S3Calm--S3SE3S3--SE3S33S3SW6CalmSW8S3CalmSW44SW5W3

Tide / Current Tables for Duwamish Waterway, Washington
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Duwamish Waterway
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Mon -- 02:21 AM PDT     3.80 feet Low Tide
Mon -- 06:10 AM PDT     Sunrise
Mon -- 07:41 AM PDT     8.95 feet High Tide
Mon -- 10:11 AM PDT     Moonset
Mon -- 02:10 PM PDT     1.47 feet Low Tide
Mon -- 08:14 PM PDT     Sunset
Mon -- 08:37 PM PDT     10.68 feet High Tide
Mon -- 10:21 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.24.73.9456.47.88.78.98.375.43.72.21.51.93.35.37.59.410.510.69.98.6

Tide / Current Tables for Restoration Point, 0.6 miles ESE of, Washington Current
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Restoration Point
Click for Map
Mon -- 03:33 AM PDT     0.00 knots Slack
Mon -- 04:59 AM PDT     0.27 knots Max Flood
Mon -- 06:10 AM PDT     Sunrise
Mon -- 07:41 AM PDT     -0.00 knots Slack
Mon -- 10:11 AM PDT     Moonset
Mon -- 11:23 AM PDT     -0.72 knots Max Ebb
Mon -- 02:57 PM PDT     0.00 knots Slack
Mon -- 05:13 PM PDT     0.55 knots Max Flood
Mon -- 08:14 PM PDT     Sunset
Mon -- 08:44 PM PDT     -0.00 knots Slack
Mon -- 10:22 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.7-0.6-0.4-0.10.10.30.20.1-0.1-0.3-0.6-0.7-0.7-0.5-0.300.40.50.50.40.2-0.1-0.4-0.6

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 (22,6,7,8)
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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.