Saturday, December7, 2019
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Marine Weather and Tides
Rainier, OR

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:38AMSunset 4:27PM Saturday December 7, 2019 6:37 AM PST (14:37 UTC) Moonrise 2:27PMMoonset 2:38AM Illumination 81% Phase: Waxing Gibbous; Moon at 11 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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PZZ210 Columbia River Bar- 244 Am Pst Sat Dec 7 2019
In the main channel.. - general seas...seas 6 to 7 ft today through Sunday. - first ebb...around 130 pm today, with seas near 9 ft. - second ebb...around 145 am Sunday, with seas near 9 ft. - third ebb...around 215 pm Sunday, with seas 8 to 9 ft.
PZZ200 244 Am Pst Sat Dec 7 2019
Synopsis for the southern washington and northern oregon coast.. A broad area of low pressure over the coastal waters today, with main low moving inland over northern california. High pres will build over the offshore waters tonight and Sunday. This high will shift inland over the pac nw early next week. NExt low will approach the region later next week, with increasing seas and winds.


7 Day Forecast for Marine Location Near Rainier, OR
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location: 46.1, -122.95     debug


Area Discussion for - Portland, OR
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FXUS66 KPQR 071022 AFDPQR

Area Forecast Discussion National Weather Service Portland OR 222 AM PST Sat Dec 7 2019

SYNOPSIS. An upper level low well off the north California coast early this morning will move east and weaken today. This will bring periods of light rain to the area. The unsettled conditions continue through Saturday night. High pressure returns to the area Sunday and persists into early next week for another potential round of air quality issues.

SHORT TERM. Today through Monday . Water vapor pictures this morning showed an upper low near 40N 130W moving east, with an upper level trough extending northeast across the northwest corner of Oregon and into Washington. A few distinct shortwaves were seen lined up along the east side of the trough and lifting north- northeast. The first was crossing the Columbia early this morning, associated with the batch of rain that was lifting into Washington early this morning. The second wave was approaching the coast along the California-Oregon border, and expected to cross the region later this morning and given the current rain shield associated with it should be good for categorical pops across most of the region. The third was rounding the base of the trough near 37N at 130W. Models suggest this wave will brush across at least the southern part of the forecast area late this afternoon or evening with the main upper trough axis following later in the night. Overall this will keep pops high through this afternoon, then decreasing Sat night into Sun. Surface observations showed the upper part of the Hood River valley with temperatures around freezing still at 2 AM, with temperatures likely to slowly rise this morning. It is not clear if rain there will completely end between short waves this morning as weak isentropic lift continues in the low levels, so will keep the winter weather advisory for the Upper Hood River Valley going through 10 AM.

For Sunday through Monday models have been consistent in shifting a sharp upper ridge into the region. This will set up a dry and stable weather pattern, which will favor the development of stagnant air in the low levels along with conditions favorable for the development of fog and low clouds.

LONG TERM. Monday night through Saturday . First wave to push into and potentially through the upper ridge is expected by models to arrive about Tuesday or Tuesday night. Traditionally models tend to overestimate precipitations chances with the first system through, but enough GEFS members and the 00Z EC operational run suggest sufficient energy/moisture to warrant raising pops a bit Tue, as well as spreading pops inland a little quicker.

Remainder of long term discussion unchanged . When examining the WPC 500mb height clusters for next Thursday through Saturday, there is general agreement that a broad deep positively tilted trough will dig southward over the southern Gulf of Alaska while a shortwave ridge builds northward along the West Coast of the US. This pattern appears favorable for an atmospheric river to move northeastward towards the Pacific Northwest. However, there are considerable differences in the models in the amplitude of the shortwave ridge over the West Coast, which makes a big difference in whether or not it will impact Oregon, Washington or British Columbia later next week. /Neuman

AVIATION. Moist southwesterly flow aloft, with upper disturbances embedded in the flow. Back edge of the first will push north of Columbia River by 12Z. This will maintain mix of VFR with light rain, along with pockets of IFR inland. Next system will arrive after daybreak, and spread rain across most of the region from south to north after 14Z. Will see widespread MVFR across thee region at that time, with rain. Best conditions will along the coast this am, but even there will see increasing MVFR as onshore flow starts increasing after 20Z.

KPDX AND APPROACHES . VFR until 14Z, with brief occasional cigs dropping down to IFR. As next upper disturbance arrives this am, will see conditions lower to MVFR between 14Z and 16Z, with rain increasing. Though vis will improve by late afternoon, MVFR CIGS will persist into the evening. /Rockey

MARINE. Broad area of low pres along the coast will gradually shift inland over Oregon today and tonight, with main surface low moving into far northern Calif. East to southeasterly winds of 10 to 15 kt will gradually weaken today and tonight. Winds will gradually turn more northerly on Sunday, as high pres builds over the northeast Pac.

Seas have been running around 10 to 11 ft, thanks to bit more southerly swell. But, this fetch will subside today, as the main low shifts towards northern Calif and fetch area decreases. Will maintain a mix of swell, with a westerly base swell of 4 to 5 ft, and the south to southwest swell of 7 to 10 ft. As the southerly swell decreases, the westerly swell will slowly build on Sun, becoming the dominant swell by later Sun afternoon.

Benign pattern over the region for start of next week, with lighter winds and smaller swell. But, that will change later in the week as more active pattern returns, with more winds and larger swells arriving by late Thu and Fri.

PQR WATCHES/WARNINGS/ADVISORIES. OR . Winter Weather Advisory until 10 AM PST this morning for Upper Hood River Valley.

Air Stagnation Advisory until noon PST Tuesday for Cascade Foothills in Lane County-Central Willamette Valley-Greater Portland Metro Area-Lower Columbia-Northern Oregon Cascade Foothills-South Willamette Valley.

WA . Air Stagnation Advisory until noon PST Tuesday for Greater Vancouver Area-I-5 Corridor in Cowlitz County-South Washington Cascade Foothills.

PZ . Small Craft Advisory until 10 AM PST this morning for coastal waters from Cape Shoalwater WA 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 nautical miles 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
LOPW1 - 9440422 - Longview, WA 0 mi56 min 46°F1007 hPa
ASTO3 - 9439040 - Astoria, OR 44 mi50 min SSE 4.1 G 8
46243 - Clatsop Spit, OR - 162 63 mi38 min 49°F7 ft

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Southwest Washington Regional Airport, WA3 mi42 minSSE 78.00 miOvercast44°F42°F93%1007.7 hPa
Scappoose Industrial Airpark, OR23 mi45 minSSW 310.00 miMostly Cloudy43°F39°F89%1007.4 hPa

Link to 5 minute data for KKLS

Wind History from KLS (wind in knots)
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Last 24hrCalmN3N3S5S6SE4CalmCalmCalmCalmN4CalmCalmSE3S4SE45SE5CalmSE4S5SE5SE6SE7
1 day agoCalmS5CalmS6S4SE9SE7S4SE4CalmNE3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSE4CalmCalm
2 days agoSE6SE5SE8SE6SE7S43S4S3CalmCalmCalmCalmSE4CalmS3CalmSE4SE5SE6S6SE5SE3S4

Tide / Current Tables for Knappa, Knappa Slough, Columbia River, Oregon
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Knappa
Click for Map
Sat -- 02:41 AM PST     Moonset
Sat -- 04:24 AM PST     1.96 feet Low Tide
Sat -- 07:42 AM PST     Sunrise
Sat -- 10:19 AM PST     8.14 feet High Tide
Sat -- 02:29 PM PST     Moonrise
Sat -- 04:28 PM PST     Sunset
Sat -- 05:31 PM PST     1.34 feet Low Tide
Sat -- 10:59 PM PST     6.54 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.24.23.32.522.134.467.38.187.25.94.53.22.11.41.42.23.656.16.5

Tide / Current Tables for Vancouver, Columbia River, Washington (dubious accuracy)
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Vancouver
Click for Map
Sat -- 02:37 AM PST     Moonset
Sat -- 02:52 AM PST     1.30 feet High Tide
Sat -- 06:04 AM PST     0.92 feet Low Tide
Sat -- 07:37 AM PST     Sunrise
Sat -- 07:39 AM PST     0.98 feet High Tide
Sat -- 11:02 AM PST     0.41 feet Low Tide
Sat -- 02:25 PM PST     Moonrise
Sat -- 03:24 PM PST     1.70 feet High Tide
Sat -- 04:26 PM PST     Sunset
Sat -- 11:45 PM PST     0.18 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.91.21.31.210.9110.80.60.40.611.41.71.71.51.31.21.210.60.3

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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Portland, OR (9,2,3,4)
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Ground Weather Radar Station Portland, OR
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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.