Sunday, September15, 2019 L-36.com


Marine Weather and Tides
Manchester, WA

Version 3.4
NOTICE
9/4/2019 Fixed the weather maps due to NOAA moving them.
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 6:46AMSunset 7:24PM Sunday September 15, 2019 7:31 PM PDT (02:31 UTC) Moonrise 7:28PMMoonset 7:04AM Illumination 96% Phase: Waning Gibbous; Moon at 17 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- 300 Pm Pdt Sun Sep 15 2019
Tonight..S wind 10 to 20 kt easing to 10 kt after midnight. Wind waves 1 to 3 ft. A chance of showers.
Mon..S 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. A slight chance of showers in the morning then a chance of showers and isolated tstms in the afternoon.
Mon night..SW wind 5 to 15 kt becoming S 10 to 20 kt after midnight. Wind waves 1 to 3 ft. A chance of showers.
Tue..S wind 15 to 25 kt. Wind waves 2 to 4 ft.
Tue night..S wind 15 to 25 kt easing to 5 to 15 kt after midnight. Wind waves 2 to 4 ft subsiding to 2 ft or less.
Wed..S wind to 10 kt becoming N in the afternoon. Wind waves 1 ft or less.
Wed night..N wind to 10 kt in the evening becoming light. Wind waves 1 ft or less.
Thu..Light wind becoming N to 10 kt. Wind waves 1 ft or less.
Fri..S wind to 10 kt. Wind waves 1 ft or less.
PZZ100 300 Pm Pdt Sun Sep 15 2019
Synopsis for the northern and central washington coastal and inland waters..Weak onshore flow will continue Sunday and Monday, with wind generally less than 20 kt. A strong weather system will arrive Tuesday, with perhaps the first southerly gales of the season. Lighter winds will follow mid week.


7 Day Forecast for Marine Location Near Manchester, WA
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location: 47.57, -122.53     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 152216
afdsew
area forecast discussion
national weather service seattle wa
316 pm pdt Sun sep 15 2019

Synopsis Scattered showers will continue in a post-frontal
environment through much of Monday. Isolated lightning will be
possible across the area Monday afternoon evening with these
showers. Another organized cold front will bring widespread rain
to the area Tuesday, with scattered showers following again into
Wednesday. After a brief break Thursday, a few showers will be
possible Friday. Another front may approach during the weekend.

Short term tonight through Wednesday A deep broad upper
trough is in place roughly from bc into the far eastern pacific
and into the pacific northwest this afternoon. Downstream from
this feature exists a broad ridge of high pressure encompassing
much of the remaining conus, with stronger westerlies jet across
the canadian prairies into the northeast us. At the surface, a
seasonably strong cold front was progressing eastward across the
pacnw, with broad high pressure across the majority of the conus
east of the rockies.

The aforementioned cold front has pushed east of the cascade crest
this afternoon, with the more widespread rain shield yielding more
of a scattered shower regime. This will be the rule through the
evening hours as skies remain generally overcast. 24 hour rainfall
totals remain highest across the olympics and cascades, where over
2 inches of rain has fallen. Elsewhere across the lowlands,
generally anywhere from 0.25-0.75 inches is a good average.

Through the day on Monday, scattered showers will continue across
western washington, with the deep upper trough axis gradually
moving overtop the area. Model guidance suggest 500mb temps will
drop to between -20c and -22c, indicative of a decent cold air
pocket associated with the trough. As such, 700-500mb lapse rates
could easily approach 7c km, making for an unstable post-frontal
environment. Although progged instability values are generally
low, especially sfc based, feel there will be a chance for a few
lightning strikes across the area Monday afternoon and evening.

Spc day 2 outlook also shows this potential, so while very low,
have put mention of this in the forecast. Should a thunderstorm
develop, moderate to locally brief heavier rainfall will be
possible, perhaps with a few graupel pellets mixed in. There may
be very brief pause in the weather action Monday night before the
next organized cold front approaches.

Cold frontal timing and strength are depicted similarly in the
guidance, with the front moving across western washington through
the morning and into the afternoon on Tuesday, carrying with it
widespread rainfall similar to what was experienced today. In
addition, winds look a bit breezier with this system, with progged
850mb winds in the 30-40kt range. Be sure to reference the marine
section as this will have implications across the waters.

Widespread rain will transition to showers late Tuesday through
Wednesday morning.

Kovacik

Long term Thursday through Sunday An east-west oriented
shortwave ridge will pass by the local area Wednesday night into
Thursday. This is expected to allow for height rises and a brief
respite from the rainy weather systems. Nevertheless, a weak
shortwave embedded within the flow will bring some moisture into
the area late in the day. The shortwave will continue to move
south across the area on Friday. It appears possible a few
showers may accompany this wave, tho coverage is fairly low
confidence at this point.

A dry day may then materialize for most of Saturday, tho guidance
suggests the next front may move in from the north late Saturday
into early Sunday. This could provide yet another period of
widespread rain. Will monitor the evolution of this system in the
coming days.

Kovacik

Aviation Steady rain has become more showery behind a surface
front that exited the area today. Southwesterly flow aloft this
evening will become light and variable as an upper trough moves over
the area Monday. Light to moderate onshore surface flow will
continue tonight and Monday. The air mass is moist and slightly
unstable. Ceilings are generallyVFR with some MVFR areas in the
north interior. Conditions will likely become MVFR later tonight at
most terminals, then improve significantly Monday afternoon.

Ksea... CurrentlyVFR with ceilings 3-4k ft and likely to remain
vfr into the evening. MVFR ceilings will return overnight, with
visibility restrictions in fog possible as well.VFR Monday
afternoon. Southerly winds 6-12 kt, easing late tonight. Chb

Marine Small craft advisory southerly winds will keep going until
5 pm or so over the east entrance and northern inland waters. Winds
and seas will ease tonight into Monday. Another strong system will
arrive Tuesday, with possible gale force southerlies over the
coastal and parts of the interior waters. A gale watch is in effect
for Tuesday. Winds will ease again Wednesday and Thursday. Chb

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... 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-east entrance u.S.

Waters strait of juan de fuca-northern inland waters
including the san juan islands.

Small craft advisory until 5 pm pdt this afternoon for 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
WPOW1 - West Point, WA 8 mi32 min SSE 12 G 13 59°F 1007.3 hPa (+0.3)56°F
46120 15 mi36 min SSW 5.8 60°F 1006.2 hPa55°F
TCMW1 - 9446482 - Tacoma Met, WA 21 mi50 min S 5.1 G 6
TCNW1 - 9446484 - Tacoma, WA 22 mi50 min 62°F 56°F1008 hPa
46121 23 mi33 min 60°F 1007.6 hPa56°F
46125 24 mi41 min 7.8 59°F 1006.1 hPa56°F
PTWW1 - 9444900 - Port Townsend, WA 39 mi50 min S 1.9 G 2.9 57°F 53°F1007.7 hPa

Wind History for Seattle, Puget Sound, WA, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boeing Field - King County International Airport, WA12 mi39 minS 9 G 1610.00 miPartly Cloudy61°F54°F78%1007.5 hPa
Bremerton, Bremerton National Airport, WA14 mi36 minS 610.00 miA Few Clouds56°F54°F93%1009.3 hPa
Seattle, Seattle-Tacoma International Airport, WA15 mi39 minSSW 610.00 miMostly Cloudy60°F53°F78%1008.3 hPa
Renton Municipal Airport, WA17 mi39 minS 48.00 miOvercast62°F55°F78%1008.1 hPa
Tacoma, Tacoma Narrows Airport, WA21 mi39 minS 610.00 miMostly Cloudy57°F54°F90%1007.7 hPa

Link to 5 minute data for KBFI

Wind History from BFI (wind in knots)
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Last 24hrS9S4S5SE5SE7SE8SE9S6S8SE9S9SE9S7S7SE9SE8S6S7S8S10SW8S7S7S9
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S5SE7S6S4S4S4SE5S7S8S9S6S9S9SE7S8S10S6S6S8S8
2 days ago5SW7S7S11S9S7S5S6S7S5S7S6S5S10
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--6S95

Tide / Current Tables for Clam Bay, Rich Passage, Washington
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Clam Bay
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Sun -- 12:29 AM PDT     3.38 feet Low Tide
Sun -- 06:14 AM PDT     10.01 feet High Tide
Sun -- 06:47 AM PDT     Sunrise
Sun -- 08:05 AM PDT     Moonset
Sun -- 12:29 PM PDT     1.60 feet Low Tide
Sun -- 06:52 PM PDT     10.97 feet High Tide
Sun -- 07:22 PM PDT     Sunset
Sun -- 08:27 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.53.54.56.17.99.3109.78.76.94.92.91.81.82.94.97.19.210.61110.4974.9

Tide / Current Tables for Rich Passage, West end, Washington Current
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Rich Passage
Click for Map
Sun -- 12:54 AM PDT     0.00 knots Slack
Sun -- 03:52 AM PDT     2.03 knots Max Flood
Sun -- 06:47 AM PDT     Sunrise
Sun -- 07:08 AM PDT     -0.00 knots Slack
Sun -- 08:05 AM PDT     Moonset
Sun -- 10:21 AM PDT     -3.19 knots Max Ebb
Sun -- 12:43 PM PDT     0.00 knots Slack
Sun -- 04:06 PM PDT     2.86 knots Max Flood
Sun -- 07:22 PM PDT     Sunset
Sun -- 07:46 PM PDT     -0.00 knots Slack
Sun -- 08:27 PM PDT     Moonrise
Sun -- 10:52 PM PDT     -3.25 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.60.11.21.821.81.10.2-1.2-2.4-3.1-2.9-1.40.41.62.52.92.721-0.3-1.9-2.9-3.2

Weather Map
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wmap_P
GEOS 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 (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.