Wednesday, February19, 2020
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Marine Weather and Tides
St. Helens, OR

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 7:04AMSunset 5:43PM Wednesday February 19, 2020 6:39 AM PST (14:39 UTC) Moonrise 5:03AMMoonset 1:50PM Illumination 18% Phase: Waning Crescent; Moon at 25 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 Wed Feb 19 2020
In the main channel.. - general seas...4 to 6 ft through Thursday. - first ebb...around 2 pm Wednesday. Seas to 7 ft. - second ebb...around 230 am Thursday. Seas to 6 ft. - third ebb...strong ebb around 230 pm Thursday. Seas to 7 ft.
PZZ200 244 Am Pst Wed Feb 19 2020
Synopsis for the southern washington and northern oregon coast.. High pressure over the waters will persist through Friday. A surface thermal trough will help maintain gusty conditions along the coast, with the strongest winds in coastal gaps. A frontal system is expected to move through the waters over the weekend.


7 Day Forecast for Marine Location Near St. Helens, OR
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location: 45.87, -122.8     debug


Area Discussion for - Portland, OR
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FXUS66 KPQR 191105 AFDPQR

Area Forecast Discussion National Weather Service Portland OR 303 AM PST Wed Feb 19 2020

SYNOPSIS. High pressure will keep the region dry through Friday. Offshore flow strengthens today, then weakens later tonight into Thursday. A weak weather system brushes the region early Saturday, followed by a stronger front pushing across the region Sat night and Sunday. A cool start to next week, but looks like should be dry.

SHORT TERM. Today through Friday . No big changes. High pressure over the region keeping area dry, but chilly. At 3 am, temperatures at many lowland locations were in the upper 20s to lower 30s. But, where east winds are blowing, temperatures are milder, such as Portland and Troutdale where temperatures were in the lower 40s. Do have few pockets of low stratus and fog forming to south of Eugene along the Coast Fork of the Willamette, as well as in the Cowlitz Lowlands. But, this will be short-lived and should dissipate between 9 and 11 am today. Otherwise,sunny and dry today. Most locations will see a mild day, with afternoon temperatures into the lower to middle 50s. Would not be surprised if a few spots reach near 60, especially along the coast where temps will get a boost from the downsloping wind flow.

Cross-Gorge pressure gradient sitting at almost 5 mb offshore, maintaining gusts to 25 to 40 in the western Columbia Gorge and gusts 20 to 25 mph across east Vancouver/Portland metro area. Offshore gradients will continue to build, and should peak this afternoon into this evening. Models still indicate this gradient will peak at around 6 to 6.5 mb offshore later this evening into the overnight hours. At this strength, would see gusts in the western Gorge of 40 to 50 mph, with gusts in east Portland/Vancouver metro areas of 25 to 40 mph. So, not enough to support any advisories. Where winds stay up tonight, temperatures will stay in the middle to upper 30s. But, for those that are wind-sheltered from the easterly winds, temperatures will again drop into the upper 20s.

But, rather dry air will be riding the offshore flow westward. With that, will be dry, with little if any potential of fog tonight into Thu. Even frost may be problematic, and would be patchy in nature.

Will see increasing clouds from the southwest on Thu, but generally will be a partly cloudy day with milder temperatures. Again, in wind-sheltered areas, will be a chilly start to the day. Offshore gradients will relax though the day on Thursday, with offshore winds easing. Will generally see light winds Thu night, with patchy fog. But, will be another chilly night. Gradually will see return to light onshore flow during the day on Friday, as a front slowly approaches from the west. Only expected variable cloudiness on Friday, with no rain as front still too far offshore. Still mild, with temperatures in the lower 50s for highs. /Rockey

LONG TERM. Friday night through Tuesday . No changes. Previous discussion follows. Models continue to hint that a weakening front will move across the area Friday night as a shortwave trough slides east into British Columbia. The 12Z operational model runs show light QPF across the northern two-thirds of the area late Friday night through Sat morning. Nearly all of the ECMWF KPDX ensemble members show no QPF in the 06Z-18Z Sat time frame. Models and their ensembles remain in good agreement showing a more consolidated shortwave trough dropping southeast into the Pacific Northwest late Saturday into Sunday. There are rather substantial differences between the GFS and ECMWF regarding this system. The operational GFS depicts a near 980 mb low at 48N 131W 06Z Sun, while the ECMWF is 5- 6 degrees longitude more west. This storm system looks to bring another shot of valley rain and mountain snow in the Sat night through early Mon period. The National Blend of Models (NBM) shows snow levels lowering to 1000 to 1500 ft Sun evening. However, by Sun night the bulk of the precipitation will have already occurred. The Oregon Coast Range, SW Washington Willapa Hills and even the higher parts of the PDX West Hills may get a little snow Sun night into Mon morning. High pressure returns Mon night and Tue for a return to drier conditions. Weishaar

AVIATION. Offshore flow is expected to maintain widespread VFR conditions across northwest Oregon and southwest Washington next 24 hours. There is a slight chance of fog with IFR conditions briefly in the vicinity of KEUG between 13Z and 19Z. Expect gusty winds through the west end of the Gorge and locally along the coast and in the Coast Range to continue as well, with a modest increase in strength after 15Z-20Z.

KPDX AND APPROACHES . VFR conditions next 24 hours. East winds expected to strengthen some during the day after 15Z-20Z.

MARINE. No changes. Previous discussion follows. Offshore winds prevail over the waters through today. A thermally-induced low over northern California will result in marginal SCA gusts over the PZZ275 and PZZ270. Localized regions of SCA gusts will continue through the night and into Wednesday morning as winds push through gaps in the coastal terrain. There is not enough confidence to issue a wide spread advisory past 10pm this evening as these winds are again marginal and highly localized. Small crafts near Heceta Head, Newport, Neskowin, Oceanside and Astoria should be cautious tonight and Wednesday morning.

Winds will subside Wednesday night and begin the transition back to a westerly regime by Friday morning. Winds will stay below 10 kt through Friday night ahead of a system that looks to arrive Saturday night.

Seas will trend between 5 to 8 ft through Friday afternoon. Seas will build as the fresh swell from the Saturday system moves into the waters. There is moderate probability of the seas building to near 20 ft Sunday afternoon according to the 12Z GWES. -BPhillips

PQR WATCHES/WARNINGS/ADVISORIES. OR . None. WA . None. PZ . Small Craft Advisory until 10 PM PST this evening for coastal waters from Cape Shoalwater WA to Florence OR from 10 to 60 NM.



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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
LOPW1 - 9440422 - Longview, WA 18 mi52 min 43°F1026.1 hPa
ASTO3 - 9439040 - Astoria, OR 56 mi52 min NNW 6 G 11 43°F1023.7 hPa
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 63 mi58 min 49°F1022.8 hPa

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Scappoose Industrial Airpark, OR8 mi47 minW 510.00 miFair28°F25°F88%1025.6 hPa
Southwest Washington Regional Airport, WA18 mi44 minN 010.00 miFair25°F24°F96%1026.7 hPa
Pearson Airfield, WA19 mi47 minVar 510.00 miFair28°F23°F81%1025.5 hPa
Portland, Portland International Airport, OR21 mi47 minN 010.00 miFair36°F26°F67%1025.5 hPa
Portland-Hillsboro Airport, OR24 mi47 minVar 410.00 miFair38°F24°F57%1025 hPa

Link to 5 minute data for KSPB

Wind History from SPB (wind in knots)
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Last 24hrCalmNE4NE4N553N6NE5NE7NE64NE6W4W4W4W3W4W5W3W4W4W5W4W5
1 day agoCalmCalmCalmE4Calm3NE5SE3S4NE5CalmCalmCalmW3W4N3CalmNW4NW4CalmCalmCalmCalmNW4
2 days agoW3NE3SW3SE3CalmSW86SW85NW3W4CalmW5N3SW6CalmW4CalmCalmCalmCalmW5CalmW3

Tide / Current Tables for Saint Helens, Oregon - 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 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.


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 (9,2,3,4)
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Ground Weather Radar Station Portland, OR
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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.