Monday, August21, 2017 L-36.com


Marine Weather and Tides
Leavenworth, 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 6:05AMSunset 8:02PM Monday August 21, 2017 4:54 AM PDT (11:54 UTC) Moonrise 4:57AMMoonset 7:14PM Illumination 1% Phase: New Moon; Moon at 29 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- 230 Am Pdt Mon Aug 21 2017
Today..N wind to 10 kt. Wind waves 1 ft or less. Patchy morning fog.
Tonight..N wind to 10 kt. Wind waves 1 ft or less.
Tue..Light wind becoming nw to 10 kt in the afternoon. Wind waves 1 ft or less.
Tue night..NW wind 5 to 15 kt becoming variable to 10 kt after midnight. Wind waves 2 ft or less.
Wed..Light wind. Wind waves less than 1 ft.
Wed night..N wind to 10 kt. Wind waves 1 ft or less.
Thu..SE wind to 10 kt becoming N 5 to 15 kt. Wind waves 2 ft or less.
Fri..N wind 5 to 15 kt. Wind waves 2 ft or less.
PZZ100 230 Am Pdt Mon Aug 21 2017
Synopsis for the northern and central washington coastal and inland waters..Higher pres off the coast and lower pres east of the the cascades will maintain onshore flow into western washington through late this week. A weak system moving into british columbia mid week will likely strengthen the onshore flow then.

7 Day Forecast for Marine Location Near Leavenworth, WA
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location: 47.7, -120.91     debug


Area Discussion for - Spokane, WA
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Fxus66 kotx 211119
afdotx
area forecast discussion
national weather service spokane wa
419 am pdt Mon aug 21 2017

Synopsis
High clouds will clear overnight. Skies should be favorable for
viewing the eclipse this morning, however there may be some smoke
in the northern valleys. Tuesday and Wednesday will be quite warm
with afternoon temperatures in the upper 80s to upper 90s. A
vigorous cold front passage has the potential to produce
thunderstorms Wednesday night into Thursday, mainly over the
southern idaho panhandle. This will be followed by gusty west
winds Thursday. After a cool Thursday and Friday, temperatures
will warm over the weekend.

Discussion
Today through Tuesday night: eclipse day is here! Satellite shows
an upper ridge centered off the coast with a low pressure system
moving into northern bc. While this system is located far to the
north... The southern fringes of a warm front will track across
washington and north idaho today bringing a band of high clouds.

The GFS and ECMWF show increasing cirrus through late morning over
central and NE washington into the north idaho panhandle... While
se washington should have slightly less cirrus. These high clouds
will be thin and shouldn't have much of an impact on eclipse
viewing. On Tuesday a weak upper ridge builds ahead of the next
weather system. This will result in a warming trend through
Tuesday with mostly 80s for high temperatures today... Warming into
the lower to mid 90s for Tuesday. Hazy skies and patchy smoke
will continue to be an issue for the northern valleys and idaho
panhandle given closer proximity to wildfires in bc and western
montana. The canadian smoke model suggests hazy skies may increase
to include more of eastern washington on Tuesday as fire activity
increases from regional wildfires with the warming drying air
mass. This should be short lived however with winds increasing
Wednesday into Thursday. Jw
Wednesday through Sunday: computer forecasts are still haggling
over the details of the frontal passage for Wednesday night and
Thursday. The latest forecasts have backed off on the intensity of
the front a bit. But they could easily switch back to a stronger
solution with their next version. So at this point, I backed off
slightly on the wind speeds for Thursday, but overall kept the
same theme as before.

Wednesday morning shows the potential for some elevated convection
over southeast wa and the southern panhandle. But given the lack
of synoptic lift, i'm guessing we'll mainly just see some mid-
level ACCAS clouds. Temperatures on Wednesday will actually be
slightly cooler than Tuesday, as temperatures aloft start to fall.

Winds will be a bit gusty in the afternoon with hot temperatures. Later
in the day, surface- based convection will develop over eastern
oregon and be directed to the southern panhandle. Most of the
shower thunderstorm activity should hold off until late in the
afternoon for that area. As Wednesday night progresses, more
elevated convection will move over the area east of a line from
tri-cities to colville. I expect mainly sprinkles from this
convection along with some lightning strikes, but a few convective
cores could put down a brief downpour. All of this activity will
move into montana by Thursday mid-morning.

Wind will be the main story for Thursday. The timing of the system
isn't ideal for a strong wind event. The frontal passage still
looks to be around 10pm Wednesday for the wa id border. As such,
by Thursday afternoon, the front will be well east of our area.

We'll still be windy, but just not as strong as if the timing
would be 6-12 hours slower. Humidities will be very low so fire
weather will be the concern, but temperatures will also be
markedly cooler on Thursday which will reduce the fire threat
somewhat.

Friday will be the coolest day of the week, before temperatures
start a warming trend through the weekend and into next week.

Long range forecasts show that summer isn't over, as hot weather
is possible next week. Rj

Aviation
12z tafs: thin cirrus and light terrain driven winds expected
through 12z Tuesday. Winds will be light and generally terrain
driven but may weaken or reverse briefly during the eclipse
16-19z. Hazy skies from smoke is expected over NE washington and
the N idaho panhandle... But visibilities should remainVFR. Jw

Fire weather
Gusty winds will develop on Wednesday afternoon, coupled with hot
temperatures and low humidities. This could lead to increased
activity on some of the current wildfires in the area.

A cold front will move through the region Wednesday night,
bringing the threat of thunderstorms east of a line from tri-
cities to colville. Gusty winds will develop behind the front,
especially on Thursday. There is still some uncertainty with the
wind speeds, but humidity values will be 15-20% across the region,
so critical fire weather conditions may exist on Thursday. Rj

Preliminary point temps pops
Spokane 85 60 91 63 88 61 0 0 0 0 10 20
coeur d'alene 85 54 91 57 88 57 0 0 0 0 10 20
pullman 85 52 92 57 87 57 0 0 0 0 10 30
lewiston 91 61 97 65 94 64 0 0 0 0 20 40
colville 87 51 91 54 90 53 0 0 0 0 10 0
sandpoint 83 49 89 50 88 51 0 0 0 0 10 20
kellogg 83 52 89 56 87 54 0 0 0 0 10 30
moses lake 89 54 95 59 92 57 0 0 0 0 10 0
wenatchee 88 63 93 66 90 63 0 0 0 0 10 0
omak 90 59 95 62 93 59 0 0 0 0 10 0

Otx watches warnings advisories
Id... None.

Wa... None.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
EBSW1 - 9447130 - Seattle, WA 76 mi55 min NW 2.9 G 5.1 61°F 56°F1020.2 hPa (+0.0)
WPOW1 - West Point, WA 81 mi55 min N 8.9 G 9.9 56°F 1020.5 hPa (+0.0)56°F
TCNW1 - 9446484 - Tacoma, WA 85 mi55 min 61°F 55°F1020.1 hPa (+0.0)

Wind History for Seattle, Puget Sound, WA, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Stampede Pass, WA36 mi2 hrsSW 310.00 miFair52°F48°F86%1020.6 hPa

Wind History from SMP (wind in knots)
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Last 24hrSW6SW7SW6SW6SW6645SW7SW75666W75SW4SW6SW6SW4SW4SW4SW33
1 day ago5W6335456SW64546
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2 days agoSW5SW64SW4SW66555W76W75
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Tide / Current Tables for Everett, Washington
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Everett
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Mon -- 04:26 AM PDT     10.63 feet High Tide
Mon -- 06:01 AM PDT     Moonrise
Mon -- 06:12 AM PDT     Sunrise
Mon -- 11:07 AM PDT     -1.73 feet Low Tide
Mon -- 11:31 AM PDT     New Moon
Mon -- 06:14 PM PDT     11.39 feet High Tide
Mon -- 08:10 PM PDT     Sunset
Mon -- 08:19 PM PDT     Moonset
Mon -- 11:55 PM PDT     4.40 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.46.58.19.610.510.59.37.24.41.5-0.8-1.7-1.10.73.46.48.910.711.411.1108.26.34.9

Tide / Current Tables for Marysville, Quilceda Creek, Washington
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Marysville
Click for Map
Mon -- 04:34 AM PDT     10.41 feet High Tide
Mon -- 06:01 AM PDT     Moonrise
Mon -- 06:12 AM PDT     Sunrise
Mon -- 11:31 AM PDT     New Moon
Mon -- 11:37 AM PDT     -1.56 feet Low Tide
Mon -- 06:22 PM PDT     11.16 feet High Tide
Mon -- 08:10 PM PDT     Sunset
Mon -- 08:19 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.75.57.2910.210.39.47.75.32.60.2-1.3-1.4-0.12.45.48.210.211.11110.18.56.64.9

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 Spokane, WA (7,2,3,4)
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Ground Weather Radar Station Seattle/Tacoma, WA
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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.