Thursday, March23, 2017

Marine Weather and Tides
Scappoose, OR

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:06AMSunset 7:29PM Wednesday March 22, 2017 11:04 PM PDT (06:04 UTC) Moonrise 3:04AMMoonset 12:46PM Illumination 20% 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- 750 Pm Pdt Wed Mar 22 2017
.small craft advisory for rough columbia river bar in effect from midnight tonight to 4 am pdt Thursday...
.small craft advisory for rough columbia river bar in effect Thursday afternoon...
In the main channel..8 to 9 ft this evening subsiding to around 7 ft later tonight and Thu morning...then building to around 10 ft Thu afternoon. However...seas temporarily building to around 10 ft with breakers possible during the ebb around 215 am early Thu morning and to around 10 or 11 ft with breakers likely during the ebb around 230 pm Thu afternoon.
PZZ200 750 Pm Pdt Wed Mar 22 2017
Synopsis for southern washington and northern oregon coast.. Weak higher pres building over the coastal waters this evening will move inland later tonight and Thu morning. The front from the next low pres system will move into the waters Thu afternoon and overnight Thu night. Lower pres will remain off the coast through Fri. Higher pres will slowly build over the waters Fri night and Sat. The next front is expected Sun afternoon and Sun night.

7 Day Forecast for Marine Location Near Scappoose, OR
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location: 45.7, -122.87     debug

Area Discussion for - Portland, OR
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Fxus66 kpqr 230330
area forecast discussion
national weather service portland or
831 pm pdt Wed mar 22 2017

Synopsis Showers will decrease this evening as high pressure
briefly moves over the area for a dry period tonight through Thursday
morning. An approaching cold front will bring more rain by Thursday
evening, with showers persisting through Saturday morning. Some sun
is possible Saturday afternoon. Another front is expected on Sunday.

Short term Tonight through Saturday... Showers have waned across
the area this evening as expected. The only areas of showers remain
in the north oregon and south washington coast and coast range and
the north oregon and south washington cascades. Have kept a 20 to 30
pop in these locations through the overnight and into the morning
hours tomorrow, but expect most locations to stay dry.

Removed the fog mention for the overnight hours as clearing in the
valley is struggling to materialize. Even if the clearing does
develop, winds appear to remain strong enough to keep low levels
mixed. /bentley
previous discussion follows...

models remain rather persistent with stalling the front along the
coast Thursday morning. This will leave most locations away from the
coast with dry weather for most of Thursday under increasing clouds.

However, at the coast, expect rain by late Thursday morning. Rain
returns to the interior by Thursday evening as the front moves
onshore. Rain with this front could be heavy at times. Rainfall
amounts through Friday are around 1 to 1.5 inches along the coast and
in the coast range. The interior could see up to 0.75 inches. Snow
levels will generally remain above pass level, but the cascades could
see another 3 to 5 inches.

Rain looks to turn to showers by Friday afternoon as the front moves
further inland. Despite this, the upper level trough will help to
maintain showers into Saturday. Showers decrease Saturday afternoon
as high pressure briefly rebuilds into the region. This could bring a
few hours of nice weather with occasional Sun breaks on Saturday. /64

Long term Saturday night through Wednesday... Lingering
showers Saturday night will come to an end by early Sunday as
shortwave ridging moves across the region in between systems.

However, the next round of moisture in the form of a pacific front
is not far behind and will likely spread another of round of steady
rain later Sunday. Confidence in the forecast for the first part of
next week is a bit lower, however, as forecast models do present a
rather large spread of solutions. While the generally progressive
pattern may continue, the GFS (and at least a handful of gefs
members) would favor a somewhat drier solution until around early
Wednesday. Continued to utilize a blend of models, resulting in at
least some mention of precipitation through the period, though. Snow
levels remain near or above the cascade passes through the long term
period. Meanwhile, temperatures will remain generally a few degrees
below seasonal normals for the first half of next week. Cullen

Aviation Vfr CIGS cover much of the area this evening with
the main remaining shower activity along the S wa and N or coasts
and in the S wa and N or cascades. These conditions will tend to
prevail overnight and Thu morning, though CIGS could locally
lower to MVFR. Rain and lowering MVFR CIGS with the next front
will spread onto the coast Thu afternoon, and get close to the
inland TAF sites by late Thu afternoon and especially thu

Kpdx and approaches... MainlyVFR CIGS tonight through Thu morning
with a chance of MVFR CIGS 09z-18z.VFR conditions Thu afternoon
but rain is possible after about 22z. Pt

Marine Winds have dropped below small craft advisory criteria
and that advisory ended a couple of hours ago. Winds will stay
below small craft advisory criteria overnight but ramp up
Thursday, reaching gales in the outer waters late Thu morning or
early Thu afternoon, and in the inner waters in the late thu
afternoon or evening. Gusts could reach 40 to 45 kt with this
incoming front. The winds will ease to small craft advisory
values after the front moves onshore around midnight Thu night.

Winds should drop below small craft advisory values Friday
night and remain so until the next front brings high end small
craft advisory values or low end gales Sunday.

Seas are running around 2 ft above model guidance this evening
and have extended the small craft advisory for hazardous seas
until 11 pm this evening. Seas should climb above 10 ft with the
next front Thu afternoon, peaking around 15-17 ft Thu night,
falling to around 10 ft Friday. Wave models indicate seas will
tend to hover around 10 ft this weekend, reaching their lowest
values Saturday night, then ramp back up into the lower to mid
teens Sunday night. Pt

Pqr watches/warnings/advisories
Or... None.

Wa... None.

Pz... Gale warning from 11 am Thursday to 3 am pdt Friday for waters
from CAPE shoalwater wa to florence or from 10 to 60 nm.

Small craft advisory for hazardous seas until 11 pm pdt this
evening for coastal waters from CAPE shoalwater wa to
florence or out 60 nm.

Gale warning from 5 pm Thursday to 3 am pdt Friday for coastal
waters from CAPE shoalwater wa to florence or out 10 nm.

Small craft advisory for rough columbia river bar from midnight
tonight to 4 am pdt Thursday.

Small craft advisory for rough columbia river bar from noon to
6 pm pdt Thursday.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 28 mi47 min 45°F1019.7 hPa
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 56 mi47 min 51°F1019.5 hPa
ASTO3 - 9439040 - Astoria, OR 59 mi47 min SSE 6 G 8.9 44°F 46°F1018.8 hPa

Wind History for Longview, WA
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1 day
2 days

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Scappoose, Scappoose Industrial Airpark, OR5 mi72 minWNW 410.00 miFair40°F36°F86%1019.2 hPa
Portland, Portland-Hillsboro Airport, OR12 mi72 minS 410.00 miFair43°F37°F80%1019.3 hPa
Pearson Airfield, WA12 mi72 minN 010.00 miMostly Cloudy47°F39°F77%1019.5 hPa
Portland, Portland International Airport, OR16 mi72 minW 510.00 miMostly Cloudy47°F37°F69%1019.6 hPa

Wind History from SPB (wind in knots)
Last 24hrCalm3S5NW3CalmCalmSW3SE7SE9SE13S7S11
1 day agoW4CalmS3S3CalmW3SW4W3SW4S4SE4S4S8S5SE9SE7SE4CalmNW4CalmCalmSE3--S4
2 days agoNW4--W4W4NW4W5NW3CalmCalmCalmSW4CalmW4N4CalmSE8N3CalmCalmW3CalmCalmW3NW3

Tide / Current Tables for Rocky Point, Multnomah Channel, Oregon
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Rocky Point
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Thu -- 03:48 AM PDT     1.67 feet High Tide
Thu -- 04:45 AM PDT     Moonrise
Thu -- 07:08 AM PDT     Sunrise
Thu -- 08:55 AM PDT     0.54 feet Low Tide
Thu -- 02:45 PM PDT     Moonset
Thu -- 02:51 PM PDT     2.87 feet High Tide
Thu -- 07:28 PM PDT     Sunset
Thu -- 11:53 PM PDT     0.26 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Tide / Current Tables for Kelley Point, Oregon - IGNORE HEIGHTS
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Kelley Point
Click for MapNote: The Columbia River is subject to annual freshets. Short range predictions are available at local river forecast centers. The data for stations above Harrington Point apply only during low river stages. There is a tidal influence along most of the

Thu -- 04:29 AM PDT     6.65 feet High Tide
Thu -- 04:44 AM PDT     Moonrise
Thu -- 07:07 AM PDT     Sunrise
Thu -- 11:48 AM PDT     3.34 feet Low Tide
Thu -- 02:45 PM PDT     Moonset
Thu -- 03:46 PM PDT     7.49 feet High Tide
Thu -- 07:28 PM PDT     Sunset
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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Weather Map
IR Satellite Image from GEOS

GOES Local Image of PacificNorthwest    EDIT

Wind Forecast for Portland, OR (2,6,7,8)
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Ground Weather Radar Station Portland, OR
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weather_mapweather_map weather_map

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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 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 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.