Wednesday, October18, 2017 L-36.com


Marine Weather and Tides
Chico, WA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 7:34AMSunset 6:16PM Wednesday October 18, 2017 9:55 AM PDT (16:55 UTC) Moonrise 5:11AMMoonset 5:16PM Illumination 3% Phase: Waning Crescent; Moon at 28 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 Am Pdt Wed Oct 18 2017
.gale warning in effect through this evening...
Today..S wind 10 to 20 kt rising to 25 to 35 kt. Wind waves 1 to 3 ft building to 4 to 6 ft. Rain.
Tonight..S wind 25 to 35 kt easing to 15 to 25 kt after midnight. Wind waves 4 to 6 ft subsiding to 2 to 4 ft after midnight. Rain.
Thu..S wind 10 to 20 kt becoming 5 to 15 kt in the afternoon. Wind waves 1 to 3 ft. Showers.
Thu night..S wind 10 to 20 kt. Wind waves 1 to 3 ft.
Fri..SW wind 5 to 15 kt. Wind waves 2 ft or less.
Fri night..S wind 5 to 15 kt becoming 10 to 20 kt after midnight. Wind waves 1 to 3 ft.
Sat..S wind 5 to 15 kt. Wind waves 2 ft or less.
Sun..S wind 5 to 15 kt. Wind waves 2 ft or less.
PZZ100 842 Am Pdt Wed Oct 18 2017
Synopsis for the northern and central washington coastal and inland waters..A strong frontal system will move through the area today with gales expected over most waters. Onshore flow will prevail Thursday and Friday with swells reaching 20 feet over the coastal waters. Another strong frontal system will reach the area Saturday.

7 Day Forecast for Marine Location Near Chico, WA
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location: 47.62, -122.69     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 181634
afdsew
area forecast discussion
national weather service seattle wa
934 am pdt Wed oct 18 2017

Synopsis A strong warm front will move to the near the canadian
border midday and stall. The front will sag southeast as a cold
front tonight. Windy conditions and heavy rainfall will occur in
the warm sector through tonight. Behind the cold front, expect
numerous showers with snow level dropping to 3000-3500 feet by
Friday. Another strong front will pass across the pacific
northwest Saturday through Sunday giving windy conditions and
potentially heavy rainfall. Drier weather may develop early next
week as a ridge of high pressure strengthens to our south.

Short term A strong warm is lifting northward across the area
this morning and will move to the far northern portion of the
forecast area midday before stalling. Rain and increasing
southeast winds are occurring along the coast and to the
northeast of the olympics. The front will sink slowly back to the
south and southeast tonight and out of the area late tonight. The
two concerns through tonight continue to be wind and rain.

Regarding wind, south to southeast pressure gradients are picking
up this morning and will peak during the afternoon hours. Peak
southerly gradients occur during the mid to late afternoon hours.

The 12z GFS continues to show peak portland to bellingham
gradients about 11 mb. Initially, strongest winds will be on the
coast and in the northern interior zones from the southeast. The
remainder of the i-5 corridor from seattle southward will get the
strongest winds later in the afternoon through the early evening
hours as the mesolow to the northeast of the olympics and the
frontal system shift southward. A high wind warning remains in
effect for the coastal zones and the interior from everett
northward for gusts 45 to 55 mph. Wind advisories remain in effect
south of everett down to lewis county for gusts 40 to 45 mph
during the later afternoon and evening hours. Since this is the
first rather strong front of the season, impacts will be greater
due to trees being leafed and the number of dead branches that
need to be pruned from trees that were stressed by this summer's
dry spell. Winds diminish from northwest to southeast this evening
with the passage of the cold front.

Regarding rain, it is expected to be heavy in the olympics and
north cascades within the warm sector. The heaviest rainfall rates
in the mountains will be lasting for a shorter time than what was
expected this time yesterday, so the threat of river flooding
appears to be no higher than with the previous forecasts. We will
be evaluating latest river forecasts and rainfall rates before
making any changes to area flood watches. In the lowlands, total
rainfall amounts in the interior lowlands from seattle southward
are 1 to 3 inches with much of that falling from about 5 to 9 pm
this evening. Some hrrr solutions have shown 0.5 inch per hour
rain rates for a couple of hours seattle to olympia at the tail
end of the evening commute. Especially with leaf clogged drains,
some urban flooding can be expected this evening in that area in
poorly drained areas, low spots and underpasses.

Once the cold front moves south of the forecast area late
tonight, wind and rain tapers to showers and snow levels fall to
3000-3500 ft by Friday. An upper trough with cold air aloft and
instability will support convective shower activity all the way
through Friday afternoon. There could be isolated thunderstorms
along the coast and out in the coastal waters in the cool and
unstable air mass. The cascades may start seeing some locally
heavy snowfall amounts during this period requiring an eventual
issuance of a winter weather advisory Thursday night into Friday
or Friday night. Albrecht

Long term Another strong warm front will spread across western
washington on Saturday. An atmospheric river type event is
possible in the warm sector, especially across the southern half
of the forecast area later Saturday through Sunday. It will also
be windy across the region with strong south to southeast pressure
gradients being amplified as the winds aloft interact with the
terrain. While the exact location of the heavy rainfall axis is
still uncertain, model trends appear to be focusing on the area
from everett or seattle southward into extreme northern oregon.

Rainfall will gradually ease on Sunday night and Monday.

An upper ridge is expected to build northward into the pacific
northwest Monday into the middle of next week bringing a change to
dry and mild weather. Albrecht

Aviation A strong frontal system will bring rain and windy
conditions to western washington today. The coast and north interior
will see gusty S winds to 35-45kt with gusts to 20-35kt
elsewhere. Rain will be moderate to heavy at times along the coast
and mountains through this afternoon. Rain will increase in
coverage this evening, including the central and south sound, as
a frontal band shifts SE through the area. Expect MVFR to ifr
conditions with moderate to heavy rain. Rain and winds will taper
off from north to south late tonight as the frontal band exits
south. 33
ksea... Gusty S winds to 30kt peaking between 21-00z today. Rain in
the vicinity, increasing in coverage and intensity 00-09z as a
frontal band shifts SE through the area. MVFR to ifr ceilings
expected in moderate to heavy rain. 33

Marine A strong pacific frontal system will impact western
washington today with gales expected over most waters. The
frontal band will shift SE late this afternoon and evening with
winds easing. Moderate to strong onshore flow will continue
through Thursday and Friday with seas building to 20-24 feet.

Another vigorous system will reach the area on Saturday with gales
possible again. 33

Hydrology Heavy rainfall is expected today and tonight,
especially over southwest facing slopes of the olympics and north
cascades. Precipitation amounts of 4-7 inches can be expected in
the olympics, while the north cascades should see 3-5 inches. A
large part of the interior lowlands will exceed 1 inch, with a few
places south of seattle in the 1 to 3 inch range. The heavy
rainfall rates are accompanied by high snow levels well over 7000
feet. Hydro models do not explicitly show flooding on area rivers.

However, river forecasts are close enough (within a foot) on the
skokomish, nooksack, stillaguamish, and skagit that flood watches
will continue from this afternoon through midday Thursday for
snohomish, skagit, whatcom and mason counties. Lowland locations
may see urban and small stream flooding due to the combination of
high rain rates and drainage issues due to leaves clogging drains.

The greatest threat for urban flooding is along the i-5 corridor
from about seattle southward from the latter half of the evening
commute until 9 pm.

Rivers will recede later Thursday through Friday night as snow
levels drop to around 3500 feet and precipitation becomes more
showery.

Hydrologically significant precipitation appears increasingly
likely Saturday through Sunday across the southern half of the
forecast area (especially from a stevens pass-everett-southern
olympics line southward). Rivers will be starting from a higher
point; minor flooding is possible on some rivers.

Conditions will dry out starting later Sunday or Monday of next
week allowing all rivers to recede. Haner albrecht

Sew watches warnings advisories
Wa... Wind advisory until 11 pm pdt this evening for bellevue and
vicinity-bremerton and vicinity-hood canal area-seattle and
vicinity-southwest interior-tacoma area.

Flood watch from noon pdt today through Thursday morning for
bellevue and vicinity-cascades of snohomish and king
counties-cascades of whatcom and skagit counties-east puget
sound lowlands-everett and vicinity-hood canal area-lower
chehalis valley area-olympics-western skagit county-western
whatcom county.

High wind warning until 9 pm pdt this evening for admiralty
inlet area-central coast-everett and vicinity-north coast-
san juan county-western skagit county-western whatcom
county.

Pz... Small craft advisory for rough bar until 5 pm pdt Friday for
grays harbor bar.

Gale warning until 9 pm pdt this evening 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.

Gale warning until 6 pm pdt this evening for admiralty inlet-
east entrance u.S. Waters strait of juan de fuca-northern
inland waters including the san juan islands.

Small craft advisory from 5 pm this afternoon to 11 pm pdt this
evening for west entrance u.S. Waters strait of juan de
fuca.

Gale warning until 5 pm pdt this afternoon for west entrance
u.S. Waters strait of juan de fuca.

Small craft advisory until 5 pm pdt this afternoon for central
u.S. Waters strait of juan de fuca.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WPOW1 - West Point, WA 14 mi56 min SSE 18 G 19 50°F 1011.3 hPa (-2.9)43°F
46120 18 mi36 min WSW 14 53°F 1010 hPa43°F
EBSW1 - 9447130 - Seattle, WA 19 mi38 min SE 8 G 9.9 52°F 54°F1011.2 hPa
TCMW1 - 9446482 - Tacoma Met, WA 28 mi38 min ESE 6 G 8.9
TCNW1 - 9446484 - Tacoma, WA 28 mi44 min 48°F 55°F1011.9 hPa
PTWW1 - 9444900 - Port Townsend, WA 34 mi44 min ESE 8 G 16 52°F 51°F1008.1 hPa
SISW1 - Smith Island, WA 49 mi56 min SE 37 G 41 52°F 1006.3 hPa (-5.1)

Wind History for Seattle, Puget Sound, WA, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Bremerton, Bremerton National Airport, WA11 mi60 minSSW 66.00 miLight Rain Fog/Mist47°F46°F97%1012.9 hPa
Boeing Field - King County International Airport, WA22 mi63 minSSE 710.00 miOvercast49°F43°F80%1011.8 hPa
Seattle, Seattle-Tacoma International Airport, WA24 mi63 minSSE 910.00 miOvercast49°F41°F74%1012.5 hPa

Wind History from PWT (wind in knots)
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N9N8NE9NE6NE5N5NE6CalmCalmCalmCalmCalmSW4SW4SW3SW4SW3S6
1 day agoS6S9S10
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2 days agoNE9NE7NE4NE6CalmCalmNE4NE7E4NE4NE5CalmCalmCalmCalmCalmCalmCalmSE3CalmCalmCalmSW3W3

Tide / Current Tables for Tracyton, Dyes Inlet, Washington
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Tracyton
Click for Map
Wed -- 05:17 AM PDT     10.83 feet High Tide
Wed -- 06:10 AM PDT     Moonrise
Wed -- 07:34 AM PDT     Sunrise
Wed -- 11:31 AM PDT     2.52 feet Low Tide
Wed -- 05:19 PM PDT     12.10 feet High Tide
Wed -- 06:15 PM PDT     Moonset
Wed -- 06:16 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
23.35.589.910.810.69.57.75.63.72.72.746.28.8111211.910.78.76.23.71.9

Tide / Current Tables for Blake Island, SW of, Washington Current
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Blake Island
Click for Map
Wed -- 03:52 AM PDT     -0.00 knots Slack
Wed -- 06:10 AM PDT     Moonrise
Wed -- 07:34 AM PDT     Sunrise
Wed -- 07:54 AM PDT     -0.54 knots Max Ebb
Wed -- 08:42 AM PDT     0.00 knots Slack
Wed -- 11:44 AM PDT     0.39 knots Max Flood
Wed -- 03:52 PM PDT     -0.01 knots Slack
Wed -- 06:15 PM PDT     Moonset
Wed -- 06:16 PM PDT     Sunset
Wed -- 08:12 PM PDT     -0.67 knots Max Ebb
Wed -- 09:15 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.30.30.1-0-0.2-0.4-0.5-0.50.10.20.40.40.30.30.1-0-0.3-0.5-0.6-0.7-0.20.20.3

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of PacificNorthwest    EDIT
Geos

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.