Thursday, May24, 2018 L-36.com


Marine Weather and Tides
Herron Island, WA

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:23AMSunset 8:53PM Thursday May 24, 2018 7:08 AM PDT (14:08 UTC) Moonrise 2:39PMMoonset 2:30AM Illumination 73% Phase: Waxing Gibbous; Moon at 10 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- 205 Am Pdt Thu May 24 2018
Today..S wind to 10 kt in the morning becoming light. Wind waves 1 ft or less. Isolated showers in the morning.
Tonight..N wind to 10 kt. Wind waves 1 ft or less.
Fri..N wind 5 to 15 kt. Wind waves 2 ft or less.
Fri night..N wind 10 to 20 kt becoming se 5 to 15 kt after midnight. Wind waves 1 to 3 ft.
Sat..S wind to 10 kt becoming variable in the afternoon. Wind waves 1 ft or less.
Sat night..NW wind 5 to 15 kt becoming variable after midnight. Wind waves 2 ft or less.
Sun..N wind to 10 kt. Wind waves 1 ft or less.
Mon..N wind 5 to 15 kt. Wind waves 2 ft or less.
PZZ100 205 Am Pdt Thu May 24 2018
Synopsis for the northern and central washington coastal and inland waters..High pressure offshore combined with lower pressure inland will give strong onshore flow through the weekend. NEar gale to gale conditions are expected, mainly during the late afternoon and overnight hours, over the eastern two thirds of the strait of juan de fuca. Small craft advisory conditions are expected during the late afternoon and overnight hours over the inland waters near the east entrance to the strait of juan de fuca, and over the southern third of the washington coastal waters.

7 Day Forecast for Marine Location Near Herron Island, WA
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location: 47.2, -122.94     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 241033
afdsew
area forecast discussion
national weather service seattle wa
333 am pdt Thu may 24 2018

Synopsis High pressure aloft will shift east tonight. Look for
an approaching low pressure system on Friday to move across the
area Friday night. The main impact will be a deeper marine layer
and stronger onshore flow, leading to a few degrees of cooling on
Saturday. The outlook for the rest of the memorial day weekend
calls for dry weather with slightly above normal temperatures.

Short term
There were a few showers, some briefly heavy, over the CWA at
this time. Expect the shower threat to persist this morning before
ending this afternoon as drier air and subsidence sets in.

Meanwhile, the marine layer deepened overnight, thanks to strong
low level onshore flow. This allowed stratus to surge inland. Much
of the lowlands will be blanketed by a solid low overcast by
sunrise. The clouds will burn off over most areas this afternoon.

Max temps across the interior lowlands will be 5-10 degrees
cooler, on average, than yesterday.

An upper level ridge will prevail over the region today before
shifting east tonight, allowing an upper level trof to approach
from the northwest. This system will move across the region
Friday night. The main impacts from this system will be a
deepening layer and a stronger onshore pressure gradient, which
will lead to additional cooling on Saturday. There will also be a
threat of light showers over the cascades, near the crest, Friday
afternoon and evening as the upper trof approaches. Otherwise,
anticipate patchy light drizzle on the lowlands, especially on
the coast and parts of the puget sound region, late Friday night
through Saturday morning.

Temperatures during this period (Thursday-Saturday) will be near
or slightly above normal.

Long term
High pressure aloft or nearly zonal flow aloft will prevail over
the region Sunday and memorial day. This combined with weaker
surface onshore flow will result in temps being a few degrees
above normal.

Beyond memorial day, confidence in the forecast was not high due
to timing differences in the medium range models concerning a
strong upper level trof. This trof may impact the pacific
northwest about the middle of next week. Have chosen to
compromise between the slower (gfs canadian) and faster (ecmwf)
solutions. With that in mind, anticipate the upper level trof to
approach the region on Tuesday and initiate a marine push.

Cloudier and cooler conditions, along with a chance of showers,
are anticipated on Wednesday. Temps on Wednesday are currently
forecast to be below normal. The snow levels are forecast to
lower into 5500 (west) to 7500 feet (east) range.

Aviation Stratus surging inland early this morning with
ceilings in the 1000-1500 foot range with local areas of ceilings
below 1000 feet. Ceilings will begin to improve mid morning with the
ceilings below 1000 feet gone by 18z. Ceilings in the 1500-2500 foot
range with scatter out over the interior in the 19z-21z time frame.

MVFR ceilings will continue along the coast. Ceilings in the 1000-
2000 foot range will redevelop between 08z and 12z overnight.

Ksea... Ceilings below 1000 feet early this morning lifting to 1000-
2000 feet around 16z. Ceilings scattering out early this afternoon
with MVFR ceilings once again early Friday morning. Southwest wind 4
to 8 knots becoming northwesterly late in the afternoon through the
evening hours. Felton

Marine Strong onshore continues this morning with high pressure
offshore and lower pressure inland and east of the cascades.

A slight decrease in onshore flow this afternoon and tonight as
compared to Wednesday night will likely result in winds that are
a few knots lighter over the inland waters. However, an increased
northwesterly pressure gradient will give small craft advisory
conditions to the southern third of the washington coastal waters
late this afternoon and tonight.

Onshore flow is expected to increase Friday afternoon and evening
as an upper level feature moves across the region. Winds are
likely to reach gale force again over the eastern two thirds of
the strait of juan de fuca during the late afternoon and overnight
hours, and small craft advisory conditions are expected over most
of the remaining waters except for puget sound and hood canal.

The rather strong onshore flow pattern is expected to persist over
the weekend. Albrecht

Sew watches warnings advisories
Wa... None.

Pz... Small craft advisory from 5 pm this afternoon to 6 am pdt Friday
for coastal waters from point grenville to CAPE shoalwater
10 to 60 nm-coastal waters from point grenville to cape
shoalwater out 10 nm.

Small craft advisory from 4 pm this afternoon to 4 pm pdt Friday
for central u.S. Waters strait of juan de fuca-east
entrance u.S. Waters strait of juan de fuca.

Gale warning until 7 am pdt this morning for central u.S. Waters
strait of juan de fuca-east entrance u.S. Waters strait of
juan de fuca.

Small craft advisory until 7 am pdt this morning for northern
inland waters including the san juan islands.

Small craft advisory from 4 pm this afternoon to 4 am pdt Friday
for admiralty inlet-northern inland waters including the
san juan islands.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46121 12 mi131 min 54°F 1016.1 hPa52°F
TCNW1 - 9446484 - Tacoma, WA 28 mi57 min 56°F 51°F1016.9 hPa
TCMW1 - 9446482 - Tacoma Met, WA 28 mi51 min WSW 5.1 G 7
WPOW1 - West Point, WA 42 mi69 min S 12 G 14 55°F 1016.4 hPa (+1.2)52°F
EBSW1 - 9447130 - Seattle, WA 42 mi51 min SSE 6 G 8 55°F 52°F1016.8 hPa
46120 48 mi68 min WSW 9.7 55°F 1015.8 hPa53°F

Wind History for Tacoma MET, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Shelton, Shelton Sanderson Field, WA11 mi76 minSW 74.00 miFog/Mist53°F51°F93%1015.7 hPa
Olympia, Olympia Airport, WA15 mi75 minWSW 710.00 miOvercast55°F48°F80%1016.5 hPa
Tacoma, Tacoma Narrows Airport, WA20 mi76 minSSW 44.00 miFog/Mist52°F51°F97%1016.4 hPa
Bremerton, Bremerton National Airport, WA21 mi73 minVar 46.00 miOvercast with Haze0°F0°F%1016.3 hPa
Fort Lewis / Gray U. S. Army Airfield, WA21 mi71 minS 510.00 miOvercast55°F54°F99%1016.9 hPa

Wind History from SHN (wind in knots)
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Last 24hrW9W7W9W8W10SW10W13SW12
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1 day agoCalmCalmCalm44CalmE4CalmN34SE7E8SW4W4W5W4W6W7W5W3W7W6W6SW5
2 days agoW3CalmCalmCalmSE4SE33CalmN3NE3CalmNW4CalmCalmW4W3CalmCalmCalmW3CalmCalmCalmCalm

Tide / Current Tables for Arcadia, Washington
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Arcadia
Click for Map
Thu -- 02:33 AM PDT     15.24 feet High Tide
Thu -- 03:29 AM PDT     Moonset
Thu -- 05:25 AM PDT     Sunrise
Thu -- 09:33 AM PDT     2.93 feet Low Tide
Thu -- 03:07 PM PDT     10.57 feet High Tide
Thu -- 03:39 PM PDT     Moonrise
Thu -- 08:51 PM PDT     Sunset
Thu -- 08:56 PM PDT     3.33 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
11.113.61515.11411.99.26.44.23.13.14.26.28.39.910.610.29.17.35.33.83.34.16

Tide / Current Tables for Hammersley Inlet, 0.8 miles E of Libby Pt, Washington Current
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Hammersley Inlet
Click for Map
Thu -- 02:29 AM PDT     -0.01 knots Slack
Thu -- 03:29 AM PDT     Moonset
Thu -- 05:25 AM PDT     Sunrise
Thu -- 07:06 AM PDT     -2.73 knots Max Ebb
Thu -- 10:01 AM PDT     0.00 knots Slack
Thu -- 12:09 PM PDT     1.76 knots Max Flood
Thu -- 02:52 PM PDT     -0.01 knots Slack
Thu -- 03:39 PM PDT     Moonrise
Thu -- 07:14 PM PDT     -2.09 knots Max Ebb
Thu -- 08:52 PM PDT     Sunset
Thu -- 09:54 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.41.70.6-0.5-1.5-2.2-2.6-2.7-2.5-1.6-01.21.81.50.9-0.1-0.9-1.5-1.9-2.1-2-1.20.11.5

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 (10,2,3,4)
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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.