Wednesday, April8, 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 6:24AMSunset 7:42PM Wednesday April 8, 2020 11:11 AM PDT (18:11 UTC) Moonrise 7:50PMMoonset 6:15AM Illumination 99% Phase: Waning Gibbous; Moon at 16 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- 846 Am Pdt Wed Apr 8 2020
Today..N wind 5 to 15 kt. Wind waves 2 ft or less.
Tonight..N wind 5 to 15 kt. Wind waves 2 ft or less.
Thu..N wind 5 to 15 kt. Wind waves 2 ft or less.
Thu night..N wind 5 to 15 kt becoming nw to 10 kt after midnight. Wind waves 2 ft or less.
Fri..Light wind becoming sw to 10 kt in the afternoon. Wind waves 1 ft or less.
Fri night..SW wind to 10 kt. Wind waves 1 ft or less.
Sat..SW wind to 10 kt becoming n. Wind waves 1 ft or less.
Sun..N wind to 10 kt. Wind waves 1 ft or less.
PZZ100 846 Am Pdt Wed Apr 8 2020
Synopsis for the northern and central washington coastal and inland waters..Light northerly flow today. Onshore flow will return late in the week as a series of weak systems affect the area.


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 081630 AAA AFDPQR

Area Forecast Discussion . UPDATED National Weather Service Portland OR 929 AM PDT Wed Apr 8 2020

Updated Aviation Discussion

SYNOPSIS. High pressure and offshore flow will continue to strengthen over the Pacific Northwest today. The offshore flow pattern is expected to persist through Thursday morning and then switch back to onshore late in the day. A gradual cooling trend begins Friday as onshore flow strengthens. The Eastern Pacific upper ridge retreats slightly west over the weekend as an upper trough slide south through the Northern Rockies. High pressure nudges closer to the coast early next week for dry and seasonal conditions, but a weak disturbance may bring some light showers Tuesday.

SHORT TERM. Today through Friday . Water vapor satellite imagery continues to show a closed low spinning over the southern California coast this morning as an upper level ridge builds over the Pacific Northwest. Meanwhile, surface observations reveal dry offshore flow developing across the forecast area under mostly clear skies. Still not expecting widespread fog development this morning, but cannot rule out some patchy fog over portions of the far south Willamette Valley. With sunny skies and dry offshore flow today expect temps in the interior to reach into the upper 60s, with many locations likely approaching 70F. The unseasonably warm and dry conditions look to linger into Thursday as the surface thermal trough over the coast shifts inland. Model 850 mb temps continue to hover around 8-10C over the forecast area Thursday afternoon so surface temps in the interior should be a degree or two higher than this afternoon.

Guidance then shows the flow transitioning from offshore to onshore late Thursday into Friday. A weak shortwave disturbance moving into the region Thursday night will result in increasing marine stratus along the coast, with stratus filtering locally inland along the lower Columbia River Friday morning. The deepening marine layer could also wring out some occasional sprinkles along the coast Friday morning. As onshore flow develops across the region on Friday expect cooler temps to filter inland, with temps around 10 degrees cooler than Thursday. /64

LONG TERM. Friday night through Tuesday . Guidance continues to show the eastern Pacific ridge retrograding slightly west Fri night and Sat as an upper level trough gets carved out over the southern British Columbia and the Northern Rockies. This should translate into a deepening marine layer Fri night and Sat, with some light drizzle possible along the coast.

The eastern Pacific ridge begins to re-amplify Sat night, with generally dry north flow aloft Sun, with thermal trough development along the coast. Guidance has trended towards drier conditions as ridging moves closer to the coast and a large upper trough moves into the Upper Midwest. Dry and seasonal conditions look to hold into early next week, but a weak disturbance may bring some light showers to the forecast area Tuesday. There is reasonable confidence that a change to cooler and unsettled conditions occurs during the latter half of next week. /64/Weishaar

AVIATION. Established high pressure will keep skies VFR and winds northerly through Wednesday night. North winds will be gusty along the coast through Wednesday evening as a thermal trough builds. Winds weaken overnight. There is a chance for increased winds through the central and southern Willamette Valley with gusts to 20 kt after 17Z Thursday.

PDX AND APPROACHES . VFR and mostly clear skies with light northerly winds for the next 24 hours. /42

MARINE. High pressure builds over the Pacific through much of the week. A thermal trough is developing and will intensify through Fri morning. The thermal gradient will strengthen through this afternoon extending the small craft winds from the Central Oregon waters north through the Southern Washington waters. Northerly winds expected 15 to 20 kt with gusts to 25 kt through Fri morning. A period of 30 kt gusts is likely in the central waters south of 45N Thu afternoon.

Seas are quite dynamic with this system. The main swell is northwesterly around 4 ft and a 16 second period. A secondary fresh swell from the north is combined with a stronger wind wave building seas to near 7 ft with a period of 8 seconds. Expect significant wave heights to be near 6 to 8 ft through early Fri morning. Fri morning, the thermal trough will weaken and the swell will turn west-northwest. Expect seas around 5 to 7 ft with a period of 8 seconds through the weekend. -Muessle

PQR WATCHES/WARNINGS/ADVISORIES. OR . None. WA . None. PZ . Small Craft Advisory until 5 PM PDT Thursday for coastal waters from Cape Shoalwater WA to Cascade Head OR out 60 NM.

Small Craft Advisory until 5 PM PDT Thursday for coastal waters from Cascade Head OR to Florence OR out 60 NM.



Interact with us via social media: www.facebook.com/NWSPortland www.twitter.com/NWSPortland

This discussion is for Northwest oregon and Southwest Washington from the Cascade crest to 60 nm offshore. This area is commonly referred to as the forecast area.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TCNW1 - 9446484 - Tacoma, WA 75 mi53 min 50°F 48°F1027 hPa
LOPW1 - 9440422 - Longview, WA 76 mi59 min 47°F1025.6 hPa
TCMW1 - 9446482 - Tacoma Met, WA 76 mi53 min NW 1.9 G 4.1

Wind History for Longview, WA
(wind in knots)    EDIT      (on/off)   Help
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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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SW6W6----SW65SW5
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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 (14,3,4,5)
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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.