Tuesday, January22, 2019 L-36.com

Marine Weather and Tides
St. Helens, OR

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:40AMSunset 5:03PM Tuesday January 22, 2019 5:38 AM PST (13:38 UTC) Moonrise 7:15PMMoonset 8:58AM Illumination 97% 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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PZZ210 Columbia River Bar- 258 Am Pst Tue Jan 22 2019
.small craft advisory for rough columbia river bar in effect from this afternoon through this evening...
In the main channel.. - general seas...seas around 4 feet this morning building to around 7 ft this afternoon and tonight. - first ebb...around 530 am this morning. Seas building to 8 feet. - second ebb...very strong ebb around 545 pm this afternoon. Seas building to 11 feet with breakers likely. - third ebb...around 615 am Wednesday. Seas building to around 12 feet.
PZZ200 258 Am Pst Tue Jan 22 2019
Synopsis for the southern washington and northern oregon coast.. High pressure is overhead with a warm front sliding along the northern edge of the ridge today. A cold front will then cross the area tonight. High pressure returns during the latter half of the week and into next 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 221159 aaa
area forecast discussion
national weather service portland or
330 am pst Tue jan 22 2019

Synopsis A series of fronts traversing the region through the
middle of the week will bring periods of valley rain and mountain
snow before high pressure brings drier weather late in the week and
this weekend.

Short term Today through Friday... Water vapor satellite imagery
early this morning shows a shortwave ridge off the california coast.

Mid and upper level moisture is moving eastward into the pacific
northwest as it rides over the top of the upper level ridge. Modest
isentropic lift associated with a passing warm front should allow
light rain to spread across the northern half of the forecast area
later this morning and early this afternoon. Snow levels will
initially start off near 2000 feet this morning before rising to
near 5000 feet by this evening. This should keep snow impacts at a
minimum, even in the south washington cascades where precipitation
will be most prevalent.

Once the warm front passes later this afternoon, there will likely
be a break in the rain except across our far northern zones until a
trailing cold front drops southeastward across the area late tonight
and early Wednesday. Precipitation rates will likely be a bit
heavier right ahead of the cold front with hourly rainfall totals of
0.1-0.2" per hour in the willamette valley and 0.2-0.4" per hour
across the orographically favored sites in the coast range and

Once the front passes, a few light showers will be possible
Wednesday into Wednesday night, but overall the trend will be
towards the area drying out. In locations that clear, areas of late
night and morning fog will develop Wednesday night and early
Thursday. With little to no cold air east of the cascades, Thursday
and Friday appear mild areawide with lowland and foothill
temperatures rising into the 50s in most locations.

It should be noted that models are converging on the idea that a
shortwave trough will drop southeastward through the inland
northwest late Thursday. The most likely impact from this storm
system will be a temporary spike in winds and moisture across the
higher terrain, but there is an outside chance light rain could fall
along the south washington coast Thursday night. Neuman

Long term Friday night through Tuesday... Operational models and
their ensembles are in good agreement the area will remain under a
large shortwave ridge into early next week. This will produce a
multi-day stretch of dry weather, mild temperatures and areas of
late night and morning valley fog. East winds will initially be near
nonexistent, but appear increasingly likely to strengthen late in
the weekend into early next week.

It should be noted that models suggest the flow will turn weakly
offshore Saturday, particularly along the central oregon coast. With
850mb temperatures climbing into the 11-13c range, many locations
along the coast, in the coast range and even in the cascade
foothills will climb into the upper 50s to low 60s. Even mid to
upper 60s do not appear out of the question. Willamette valley
temperatures will be a little more tricky given areas of morning fog
could hamper temperatures from climbing too high. Held temperatures
on the warm side to even slightly above model guidance for most
areas, but still kept temperatures well shy of records for now.


Aviation Conditions are mainlyVFR across SW washington and
nw oregon this morning. There are a few pockets of fog and low
stratus around, but so far the only TAF site being impacted has
been khio. Expect the predominantlyVFR conditions to persist
through most of the morning. A warm front approaching the region
is resulting in increasing mid and high clouds right now. Expect
light rain to spread onto the coast by mid-morning, with cigs
lowering to MVFR by 18z. The rain will spread over the interior
lowlands, mainly north of ksle by midday. The northern interior
sites may also see some MVFR CIGS developing later in the
afternoon as well. Expect little change in the conditions
tonight into early wed.

Kpdx and approaches...VFR conditions continue through the
morning. Light rain is expected to develop by around midday and
continue at times through tonight into early wed. CIGS will
gradually lower through the day, with MVFR possible by 21z-00z.


Marine A low pressure system will be moving toward the
northern end of vancouver island today. This will bring a warm
front through the waters today, resulting in increasing southerly
winds. Then the trailing cold front will move through tonight. The
strongest winds look to be over the northern waters, where
consistent gusts of 25 to 30 kt are expected to persist through
much of tonight. There may even be some occasional gusts to 35
kt. Winds should be a little lighter over the central or waters.

A small craft advisory for winds is in effect for all of the
waters through early Wed morning. Winds will drop off fairly
quickly Wed behind the frontal passage. Then expect a period of
rather benign conditions to develop that will likely last into at
least early next week.

Seas will remain around 6 to 8 ft this morning. Then expect them
to build into the low teens this afternoon. A small craft
advisory has been issued for seas from this afternoon through wed
afternoon. Seas may end up remaining near or above 10 ft into
early thu. Seas then subside below 10 ft Thu and should remain
below for the next several days. Pyle

Pqr watches warnings advisories
Or... Coastal flood advisory from noon today to 4 pm pst this
afternoon for north oregon coast.

Wa... Coastal flood advisory from noon today to 4 pm pst this
afternoon for south washington coast.

Winter weather advisory until 10 pm pst this evening for south
washington cascades.

Pz... Small craft advisory for winds until 7 am pst Wednesday for
coastal waters from CAPE shoalwater wa to cascade head or
out 60 nm.

Small craft advisory for hazardous seas from 10 am this morning
to 4 pm pst Wednesday for coastal waters from cape
shoalwater wa to florence or out 60 nm.

Small craft advisory for winds until 7 am pst Wednesday for
coastal waters from cascade head or to florence or out 60

Small craft advisory for rough columbia river bar from 4 pm
this afternoon to 8 pm pst this evening.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 18 mi50 min 42°F1031 hPa
ASTO3 - 9439040 - Astoria, OR 56 mi50 min E 7 G 9.9 44°F 42°F1028.6 hPa
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 63 mi50 min 50°F1030.3 hPa

Wind History for Longview, WA
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1 day
2 days

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Scappoose Industrial Airpark, OR8 mi46 minN 03.00 miFog/Mist40°F37°F93%1031.3 hPa
Southwest Washington Regional Airport, WA18 mi42 minSE 810.00 miOvercast42°F37°F85%1031.5 hPa
Pearson Airfield, WA19 mi45 minSE 410.00 miOvercast41°F37°F89%1031.6 hPa
Portland, Portland International Airport, OR21 mi45 minESE 410.00 miOvercast41°F37°F86%1031.8 hPa
Portland-Hillsboro Airport, OR24 mi45 minN 09.00 miOvercast39°F37°F96%1031.3 hPa

Wind History from SPB (wind in knots)
Last 24hrCalmSE3CalmNW3CalmCalmCalmCalmSW3Calm3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
1 day agoCalmW5N4CalmW3SE3N3SE3SE5NE4CalmCalmCalmCalmCalmCalmCalmCalmSW3N3NW4CalmCalmCalm
2 days agoCalmCalmCalmCalmCalmCalmSE3CalmCalmN3CalmCalmCalmCalmCalmCalmCalmNW3N4CalmNW3N3CalmCalm

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 and Satellite Images
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GOES 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 (8,2,3,4)
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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.