Saturday, July11, 2020
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Marine Weather and Tides
Packwood, WA

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
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.

Sunrise 5:19AMSunset 8:56PM Saturday July 11, 2020 10:35 AM PDT (17:35 UTC) Moonrise 11:39PMMoonset 11:11AM Illumination 63% Phase: Waning Gibbous; Moon at 21 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- 826 Am Pdt Sat Jul 11 2020
Today..Light wind becoming sw 5 to 15 kt in the afternoon. Wind waves less than 1 ft becoming 2 ft or less in the afternoon. A slight chance of rain in the afternoon.
Tonight..Variable wind to 10 kt becoming sw after midnight. Wind waves 1 ft or less. A slight chance of rain in the evening then a chance of rain after midnight.
Sun..Light wind becoming ne 5 to 15 kt in the afternoon. Wind waves less than 1 ft becoming 2 ft or less in the afternoon. A slight chance of rain.
Sun night..NE wind 5 to 15 kt. Wind waves 2 ft or less.
Mon..N wind to 10 kt. Wind waves 1 ft or less.
Mon night..N wind 5 to 15 kt becoming ne after midnight. Wind waves 2 ft or less.
Tue..Variable wind to 10 kt becoming nw. Wind waves 1 ft or less.
Wed..S wind to 10 kt becoming nw. Wind waves 1 ft or less.
PZZ100 826 Am Pdt Sat Jul 11 2020
Synopsis for the northern and central washington coastal and inland waters..A weak front will move through the coastal waters this afternoon and the inland waters tonight. Onshore flow will increase behind the front. Varying degrees of onshore flow Sunday through Wednesday with high pressure over the coastal waters and lower pressure inland.


7 Day Forecast for Marine Location Near Packwood, WA
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location: 46.39, -121.57     debug


Area Discussion for - Portland, OR
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FXUS66 KPQR 111720 CCA AFDPQR

Area Forecast Discussion . UPDATE National Weather Service Portland OR 1019 AM PDT Sat Jul 11 2020

Updated aviation discussion

SYNOPSIS. Aside from a chance for light rain later today through early Sunday, expect primarily dry conditions with temperatures remaining near average for much of the next week.

SHORT TERM. Today through Tuesday . Water vapor satellite imagery reveals a shortwave trough shifting east-southeastward towards the region. A plume of moisture with PW values > 1" along and ahead of an attendant front is dropping southeastward towards the region. Models are in good agreement this front will weaken substantially as it moves towards the region today. Nonetheless, there should be enough lift and moisture to produce some light rain along our north coast later this afternoon and evening. This front should then slowly push inland tonight before falling apart completely on Sunday. Along the way, it may result in some light rain north of a line extending between ~KMMV and Mt Hood later tonight into Sunday morning. The increased cloud cover to begin Sunday and cooler temperatures aloft should result in high temperatures cooling several degrees from today across the Willamette Valley and Columbia River Gorge. Models are in reasonable agreement a low amplitude ridge will shift towards the region late Sunday through Tuesday. This should result in morning clouds being primarily limited to our northern coastal zones and lower Columbia River valley each morning and inland high temperatures warming back into upper 70s to low 80s Monday and Tuesday. /Neuman

LONG TERM. Tuesday night through Saturday . Models generally agree upper level ridging will continue to reside over the northeast Pacific and Four Corners regions. This will maintain near zonal flow across the region, which should prevent any major heatwaves. Nonetheless, upper level heights should be supportive of near average to slightly above temperatures most days. Weak shortwave troughs moving east-southeastward across the Gulf of Alaska and Canada may clip the region, but exactly when and to what extent remains rather uncertain. This uncertainty manifests itself in the form of growing uncertainty in the extent of morning clouds, rain chances and temperatures as time moves on next week. For example, NBM guidance suggests there's a 50% chance high temperatures will top out between 78-83F at PDX on Wednesday while the 50% probability expands to 78-86F by Friday. Meanwhile, the operational EC suggests a shortwave trough will drop a front and attendant band of light rain into far northwest Oregon and southwest Washington Thursday. However, NBM guidance incorporating a wide range of models and ensembles actually suggests rain chances across our far northern zones are slightly higher Wednesday and Friday. Despite the latest EC solution didn't have a reason to argue with NBM guidance so deviations were minimal. /Neuman

AVIATION. Satellite observations this morning depict clear skies across the Willamette Valley and the Cascade Foothills into the Cascades. Further west, broken to overcast skies are being observed along the coast and the Coast Range with cigs mainly between 2500 and 3500 ft AGL. Mid and high clouds will also increase from northwest to southeast today, ahead of an incoming frontal boundary that will move inland this evening and push through the Willamette Valley tonight. This front will also bring a chance of light rain at KAST, beginning around 23-00z. -TK

KPDX AND APPROACHES . No concerns for the next 24 hours. VFR conditions with mostly clear skies expected through 21z Saturday as the aforementioned front advances towards the area. After 21z, expect mid and high clouds to increase with VFR cigs. -TK

MARINE. A weak front will pass over the waters Sat evening ahead of a low anchored over the Alaska Panhandle. This front, which lacks significant energy, will cause the westerly winds to increase slightly Sat night through Sun morning. Seas will largely be unaffected staying around 3 ft with an 8 second period. On Sun, high pressure will again build in over the Pacific which will persist through the middle of the week. Seas will remain fairly stable around 4 to 5 ft with an 8 second period through next week.

The main concern is in regards to winds over the waters. Winds will transition to northerly flow around the high pressure. There is a chance that winds will intensify Sun night to marginal small craft levels. At this point, models are showing a fairly weak pressure gradient which leads to a more conservative forecast regarding winds. Later in the week however, stronger winds are possible in the afternoon/evening with the addition of an inverted thermal trough pushing northward. This increased temperature gradient may intensify the northerly winds causing small craft level winds, especially in the central Oregon waters, through the middle of the week. -Muessle

PQR WATCHES/WARNINGS/ADVISORIES. OR . None. WA . None. PZ . None.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TCNW1 - 9446484 - Tacoma, WA 75 mi48 min 62°F 54°F1019.7 hPa
LOPW1 - 9440422 - Longview, WA 76 mi48 min 65°F1020.3 hPa
TCMW1 - 9446482 - Tacoma Met, WA 76 mi48 min NNW 4.1 G 4.1

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Link to 5 minute data for KCZK

Wind History from CZK (wind in knots)
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Last 24hr24------------------------SW12
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1 day ago53------------------------322SW632SE2E21S2
2 days ago----------------------------1214334434

Tide / Current Tables for Kalama, Washington - IGNORE HEIGHTS
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Saint Helens, Columbia River, Oregon
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Portland, OR (13,3,4,5)
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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 numerous 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.