Thursday, April27, 2017 L-36.com


Marine Weather and Tides
Ashford, WA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 5:55AMSunset 8:17PM Thursday April 27, 2017 12:14 AM PDT (07:14 UTC) Moonrise 6:13AMMoonset 8:55PM Illumination 2% Phase: Waxing Crescent; Moon at 1 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- 900 Pm Pdt Wed Apr 26 2017
.small craft advisory in effect until 5 am pdt Thursday...
Tonight..SW wind 15 to 25 kt...except nw wind 10 to 20 kt N of seattle until midnight. Wind waves 1 to 4 ft. Scattered showers.
Thu..SW wind 15 to 25 kt...becoming nw 10 to 20 kt from tacoma N in the afternoon. Wind waves 1 to 4 ft. A chance of showers.
Thu night..N wind 10 to 20 kt becoming sw after midnight. Wind waves 1 to 3 ft. A chance of showers in the evening.
Fri..SE wind to 10 kt. Wind waves 1 ft or less.
Fri night..NW 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 rising to 5 to 15 kt in the afternoon. Wind waves 2 ft or less.
Sat night..SW wind to 10 kt becoming S 10 to 20 kt after midnight. Wind waves 1 ft or less building to 1 to 3 ft after midnight.
Sun..SW wind to 10 kt becoming variable. Wind waves 1 ft or less.
Mon..SW wind to 10 kt becoming n. Wind waves 1 ft or less.
PZZ100 900 Pm Pdt Wed Apr 26 2017
Synopsis for the northern and central washington coastal and inland waters..Strong onshore flow will ease late tonight then be moderate Thursday and Friday. High pressure over the area will give light winds Saturday. A front will reach the area Saturday night with strong onshore flow on Sunday.

7 Day Forecast for Marine Location Near Ashford, WA
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location: 46.81, -122.06     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 270416
afdsew
area forecast discussion
national weather service seattle wa
916 pm pdt Wed apr 26 2017

Synopsis A couple of weak upper level troughs along with
continuing onshore flow will keep skies mostly cloudy with scattered
showers through Thursday night. An upper level ridge will move
across the area Friday through Saturday for mainly dry conditions
and partly sunny skies. A weak cold front will bring a little rain
late Saturday afternoon and Saturday night, followed by scattered
post-frontal showers on Sunday. A weak upper level ridge may bring
mostly dry weather early next week.

Short term Somewhat moist NW flow aloft continues tonight, as
does moist low level onshore flow. The highlight of the onshore flow
is high-end small craft advisory W winds through the strait of juan
de fuca. This has been contributing to a convergence zone from
everett to seattle this afternoon. The pscz has retreated up over sw
snohomish county at 830 pm but will probably slide SE across the n
part of king county this evening before weakening. Otherwise,
scattered showers just offshore continue to move inland over the
coast and SW interior due to the NW flow aloft and onshore flow.

This pattern will continue Thursday and Thursday night. A weak upper
level shortwave trough embedded in the NW flow will move over W wa
on Thursday, enhancing the shower activity, particularly in the
afternoon. The convergence zone is also expected to reform Thursday
afternoon. Most of the area will end up with scattered showers, but
the pscz will make showers more likely over central puget sound.

A somewhat broad moderate amplitude upper level ridge will move
closer to the pacnw on Friday, with the axis along 135w. NW flow
aloft will continue, but should be a little drier. Onshore flow will
be weaker. This should be enough to drop the showers from the
forecast Friday afternoon through at least Saturday morning.

Sunshine will be more prominent but temperatures will still be a
few degrees cooler than normal.

The gfs, nam, and ECMWF are in fair agreement that a cold front will
reach the area late Saturday. The 12z ECMWF and 00z NAM are a little
faster, bringing light rain across the coast and N half of the
interior by late Saturday afternoon, then spreading rain across the
rest of W wa Saturday evening. The 18z GFS is just a little slower.

It will be back to somewhat moist W flow aloft and onshore flow plus
convergence zone on Sunday. Kam

Long term The GFS and ECMWF are in decent agreement that a broad
low amplitude upper level ridge will be offshore on Monday, then
will gain amplitude Tuesday and Wednesday as it moves inland over w
wa. Confidence is guarded for Monday since the models show a lot of
warm advection moving through the ridge in the strong W flow aloft.

This brings warm advection rain pretty close to W wa Monday through
Thursday, so it wouldn't take much change in the models to bring a
little more rain to the area. However, if it works out right we
could be getting a bit more vitamin d therapy along with highs in
the 60s. Kam

Aviation Moderate northwest flow aloft will weaken Thursday night
and Friday. Low level onshore flow will ease Thursday morning then
increase again during the afternoon and evening. Air mass moist and
weakly unstable with scattered showers. CIGS will become primarily
MVFR by later tonight and Thursday morning withVFR most areas by
Thursday afternoon. The puget sound convergence zone will remain
active, mainly north of sea before dissipating Thursday morning.

Ksea... The convergence zone will likely remain north of the
terminal before dissipating Thursday morning. Southwest winds will
likely prevail 10-15 kt w/ gusts 25 kt easing to 8-12 kt later
tonight/Thursday morning. A wind shift to more north/northwesterly
is unlikely tonight, but is expected to occur Thursday afternoon. Dtm

Marine Strong onshore flow will maintain gale or near gale force
winds in the central and eastern strait tonight, easing to 25 kt or
less late tonight and Thursday morning. Another westerly surge of
wind may bring another round of gales to the same area later
Thursday afternoon/evening. Elsewhere, small craft winds all other
waters with onshore flow and winds easing for some areas Thursday
morning.

High pressure over the area will give light winds Saturday. A
front will reach the area Saturday night, with strong onshore flow
returning on Sunday. Dtm

Sew watches/warnings/advisories
Wa... None.

Pz... Small craft advisory all waters.

Gale warning central and eastern strait of juan de fuca through
late tonight.

Gale watch central and eastern strait of juan de fuca Thursday
afternoon through Thursday evening.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TCNW1 - 9446484 - Tacoma, WA 37 mi45 min 47°F 49°F1016.1 hPa
TCMW1 - 9446482 - Tacoma Met, WA 37 mi45 min SW 13 G 16
46121 48 mi1428 min 12 46°F 1015.1 hPa38°F
EBSW1 - 9447130 - Seattle, WA 57 mi45 min N 1.9 G 4.1 46°F 48°F1015.9 hPa

Wind History for Tacoma MET, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pierce County-Thun Field, WA24 mi20 minSSW 610.00 mi45°F41°F87%1016.3 hPa

Wind History from PLU (wind in knots)
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Last 24hrSW4SW4CalmCalmS5CalmSW5CalmSW5SW5
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1 day agoCalmSW3CalmSW3CalmCalmCalmCalmS4CalmSW3CalmSW5SW5
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SW7SW4SW4S5S4CalmCalmCalmCalmSW5
2 days agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm36CalmCalmCalmCalmSW3SW6SW3CalmCalmS3Calm

Tide / Current Tables for Tacoma, Commencement Bay, Washington
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Tacoma
Click for Map
Thu -- 12:04 AM PDT     3.96 feet Low Tide
Thu -- 05:40 AM PDT     12.18 feet High Tide
Thu -- 05:59 AM PDT     Sunrise
Thu -- 07:13 AM PDT     Moonrise
Thu -- 12:29 PM PDT     -1.67 feet Low Tide
Thu -- 07:15 PM PDT     12.28 feet High Tide
Thu -- 08:15 PM PDT     Sunset
Thu -- 09:57 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
44.56.28.310.511.912.1118.962.90.1-1.5-1.40.22.96.19.111.312.21210.78.86.7

Tide / Current Tables for Tacoma, Commencement Bay, Sitcum Waterway, Puget Sound, Washington (sub)
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Tacoma
Click for Map
Thu -- 12:00 AM PDT     3.83 feet Low Tide
Thu -- 05:41 AM PDT     12.28 feet High Tide
Thu -- 05:59 AM PDT     Sunrise
Thu -- 07:13 AM PDT     Moonrise
Thu -- 12:22 PM PDT     -1.78 feet Low Tide
Thu -- 07:08 PM PDT     12.20 feet High Tide
Thu -- 08:15 PM PDT     Sunset
Thu -- 09:57 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.84.56.28.410.51212.211.18.95.92.7-0.1-1.6-1.40.43.36.69.411.412.211.810.58.66.5

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 (3,6,7,8)
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Ground Weather Radar Station Portland, OR
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weather_mapweather_map weather_map

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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.