Friday, February22, 2019 L-36.com


Marine Weather and Tides
Clatskanie, 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 7:01AMSunset 5:49PM Friday February 22, 2019 6:30 PM PST (02:30 UTC) Moonrise 9:58PMMoonset 9:04AM Illumination 86% Phase: Waning Gibbous; Moon at 18 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- 200 Pm Pst Fri Feb 22 2019
.small craft advisory for rough columbia river bar in effect from 5 pm this afternoon to 9 pm pst this evening...
.small craft advisory for rough columbia river bar in effect from late tonight through Saturday morning...
In the main channel.. - general seas...5 ft tonight building to 7 ft Sat. - first ebb...strong ebb around 7 pm Friday evening. Seas building to 10 feet with breakers possible. - second ebb...strong ebb around 730 am Saturday. Seas building to 11 feet with breakers likely. - third ebb...ebb around 745 pm Saturday. Seas near 11 feet with breakers likely.
PZZ200 200 Pm Pst Fri Feb 22 2019
Synopsis for the southern washington and northern oregon coast.. Weak low pressure along the british columbia coast tonight will drift south to the washington and oregon waters by Sunday morning. A stronger low pressure system will approach the coastal waters Sunday night and Monday.


7 Day Forecast for Marine Location Near Clatskanie, OR
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location: 46.17, -123.23     debug


Area Discussion for - Portland, OR
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Fxus66 kpqr 230020 aaa
afdpqr
area forecast discussion
national weather service portland or
420 pm pst Fri feb 22 2019
short term discussion updated.

Synopsis A cold front will continue moving southeast through the
forecast area tonight. The cold front is expected to stall near
eugene tonight, with another round of steady precipitation likely
developing across much of western oregon by late Saturday. Wet
snow may fall as low as 500-1000 feet as steady and locally heavy
precipitation continues Saturday night and Sunday. Snow will be heavy
in the oregon cascades. A stronger low is expected to develop
offshore along the stalled front by early Sunday morning and then
moving onshore somewhere along the central coast by late Sunday
morning. If this occurs, significant snow will be likely down to the
lowest elevations north of the front Sunday afternoon through Monday,
with heavy rain to the south of the front.

Short term Tonight through Monday... Updated temperatures
around and behind the cold front for this evening and into the
overnight hours. Obs show temperatures have dropped a bit faster
than originally thought with snow levels somewhere around 500 ft in
the vicinity of the lower columbia inland from the coast. Otherwise,
the forecast looks like it's on track. The previous short term
discussion follows. Bowen
krtx dual-pol doppler radar early this afternoon showed the precip
band that moved across the lower columbia in SW washington and n
willamette valley this morning had moved into the cascade foothills.

This resulted in areas of light snow to the valley floor, but
minimal to no accumulation. South surface wind has developed with
gusts 20 to 30 mph in the interior lowlands early this afternoon.

The frontal boundary sags southeast through the evening, stalls near
a mt. Jefferson to k6s2 line overnight and then becomes stationary
sat. The weather Saturday through Saturday night will be dominated by
the stalled front near lane county. Snow levels Saturday will range
from around 1000 ft in the SW washington interior lowlands to 2500
feet in lane county. A series of surface low pressures develop along
the frontal boundary Saturday night and Sunday. The 12z GFS and nam
show good isentropic upglide along the 290k surface over the south
and central portions of the forecast area Saturday night. The overall
forecast becomes more tricky 12z Sun through Monday, especially with
regard to lowland snow. The 12z NAM and GFS show a surface low near
konp 12z sun. The 12z ECMWF continues to show the low more south,
closer to koth. By 18z Sunday the low could be somewhere between konp
and kast, with the NAM more north and the ECMWF south. The location
of this low will have major implications on the forecast. Moisture
transport along the front will be increasing Sunday afternoon through
Sunday night, but probably won't be sufficient quite yet to be
classified as an atmospheric river. There will be a dramatic precip
intensity gradient late Sun through Sun night. The NAM indicates
40-50 SW 850 mb wind over the southern third of the area, which would
promote highly efficient orographic lifting. Meanwhile, further
north, the NAM shows much lighter e-se 850 mb wind flow. Winter storm
watches appear to be in good shape for the oregon cascades and
foothills, although the lane county cascade foothills may be more of
a question due to rising snow levels Sun night. Models show a
dramatic snow level gradient Sunday evening, with 1000 ft or lower
across the far north to as much as 5000 ft over the far south, per
the latest nam.

By Sunday evening, the GFS and NAM show the baroclinic boundary
extending from k6s2 to the mt. Hood, then the boundary starts to
become more northeast to southwest oriented by 12z mon. The ecmwf
continues to show this frontal zone more to the south and slower to
progress northward. Models agree there will be some degree of
offshore low-level flow through the gorge Sunday through Monday
morning. Precip could start as snow in the lowlands north of salem
Sunday night. There is the possibility precip remains snow near kpdx
through Mon morning. However, if the NAM verifies, the change-over to
rain would be much sooner. There is a fine line in the rain snow
forecast between ksle and kpdx. Any slight shift in the baroclinic
boundary and or deviation in the flow through the gorge would result
in large differences in location and amounts of lowland snow.

Confidence is higher for the columbia gorge and upper hood river
valley. Believe areas east of kczk will be all snow late Sun through
mon morning, followed by a mix of freezing rain and snow. Areas west
of kczk may see a few hours of snow, then more of a freezing
rain rain mix Mon morning through the afternoon. Will add these
areas to the winter storm watch starting 18z Sun through 00z tue.

Model differences continue mon. The GFS slowly drifts the baroclinic
zone south Mon afternoon, but the ECMWF maintains a north-to-south
oriented band along the coastal areas. Weishaar

Long term Monday night through Friday... The forecast for the
remainder of the upcoming week remains complicated due to
significant model differences so will continue to use a blend of
models rather than a single deterministic model. The general trend
is for the active weather pattern to continue through the week as
additional disturbances moves approach the region. Will continue to
see a potential for low elevation snow the the middle of the week,
but snow levels look to rise about 2000 feet for the second half of
the week. 64 weagle

Aviation A cold front moving south through northwest oregon this
evening will bring a period of MVFR ceilings along with a period of
rain and mountain snow to most TAF sites. Expect prevailingVFR
conditions to return as early as about 02z on the north coast, to as
late as 08z at keug. Between 08z and 14z, there is still a chance
for MVFR conditions to persist, with the best chances along the
coast.

Kpdx and approaches... A period of MVFR mixed withVFR conditions
will continue through about 04z this evening. After 04z expect
predominantlyVFR conditions, continuing through 18z.

Marine Nw winds gusting to around 25 kt will ease this evening
as a cold front moves south through the coastal waters. Seas will
build again a few feet for Saturday, reaching 10 to 11 feet before
subsiding again Saturday evening.

Winds are likely to remain under 20 kt through most of the weekend,
until a low pressure system approaching from the west comes in
Sunday night and Monday. This system is likely to bring peak gusts
into the 20 to 30 kt range Monday.

Pqr watches warnings advisories
Or... Winter storm watch from late Saturday night through Monday
afternoon for central columbia river gorge-upper hood
river valley-western columbia river gorge.

Winter weather advisory until 4 am pst Saturday for northern
oregon cascade foothills-northern oregon cascades.

Winter storm watch from Saturday afternoon through late Sunday
night for cascade foothills in lane county-northern oregon
cascade foothills.

Winter storm watch from Saturday afternoon through Monday
afternoon for cascades in lane county-northern oregon
cascades.

Winter weather advisory from 6 pm this evening to 7 am pst
Saturday for cascades in lane county.

Wa... Winter storm watch from late Saturday night through Monday
afternoon for central columbia river gorge-western
columbia river gorge.

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

Pz... Small craft advisory for winds until 5 pm pst this afternoon
for coastal waters from CAPE shoalwater wa to cascade head
or out 60 nm.

Small craft advisory for hazardous seas from 3 am to 6 pm pst
Saturday for coastal waters from CAPE shoalwater wa to
cascade head or out 60 nm.

Small craft advisory for winds until 8 pm pst this evening for
coastal waters from cascade head or to florence or out 60
nm.

Small craft advisory for hazardous seas from 10 am to 6 pm pst
Saturday for coastal waters from cascade head or to
florence or out 60 nm.

Small craft advisory for rough columbia river bar from 5 pm
this afternoon to 9 pm pst this evening.

Small craft advisory for rough columbia river bar from 5 am to
10 am pst Saturday.

&

Pqr watches warnings advisories
Or... Winter weather advisory from 3 pm this afternoon to 4 am pst
Saturday for northern oregon cascade foothills-northern
oregon cascades.

Winter storm watch from Saturday afternoon through late Sunday
night for cascade foothills in lane county-northern oregon
cascade foothills.

Winter storm watch from Saturday afternoon through Monday
afternoon for cascades in lane county-northern oregon
cascades.

Winter weather advisory from 6 pm this evening to 7 am pst
Saturday for cascades in lane county.

Wa... Winter weather advisory from noon today to 10 pm pst this
evening for south washington cascade foothills-south
washington cascades.

Pz... Small craft advisory for winds until 5 pm pst this afternoon
for coastal waters from CAPE shoalwater wa to cascade head
or out 60 nm.

Small craft advisory for hazardous seas from 3 am to 4 pm pst
Saturday for coastal waters from CAPE shoalwater wa to
cascade head or out 60 nm.

Small craft advisory for winds until 9 pm pst this evening for
coastal waters from cascade head or to florence or out 60
nm.

Small craft advisory for rough columbia river bar until 9 am
pst this morning.

Small craft advisory for rough columbia river bar from 5 pm
this afternoon to 9 pm pst this evening.

Small craft advisory for rough columbia river bar from 5 am to
10 am pst Saturday.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 15 mi49 min 40°F1016.7 hPa
ASTO3 - 9439040 - Astoria, OR 29 mi43 min SE 2.9 G 4.1 40°F 41°F1015.6 hPa
46243 - Clatsop Spit, OR - 162 48 mi31 min 47°F7 ft

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Southwest Washington Regional Airport, WA18 mi35 minSSE 610.00 miOvercast37°F35°F93%1017.5 hPa

Wind History from KLS (wind in knots)
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Last 24hrSE3CalmCalmCalmSE3SE4SE6SE6S5S6SE9SE9
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1 day agoN4CalmCalmCalmW4CalmCalmCalmCalmCalmCalmCalmNW3CalmCalmN4W4NW6NW3W5W5S4S3Calm
2 days agoSE5SW5SE4SE4CalmS3CalmW3CalmCalmE3SE3SE4SE3S4S3S4W4W5W3N10N83N4

Tide / Current Tables for Knappa, Knappa Slough, Columbia River, Oregon
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Knappa
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Fri -- 03:54 AM PST     8.89 feet High Tide
Fri -- 07:06 AM PST     Sunrise
Fri -- 09:05 AM PST     Moonset
Fri -- 10:32 AM PST     0.66 feet Low Tide
Fri -- 03:58 PM PST     8.60 feet High Tide
Fri -- 05:50 PM PST     Sunset
Fri -- 09:59 PM PST     Moonrise
Fri -- 10:48 PM PST     -0.06 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.74.26.68.38.98.36.95.13.21.70.80.82.14.26.488.68.16.74.931.30.2-0

Tide / Current Tables for Harrington Point, Columbia River, Washington
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Harrington Point
Click for Map
Fri -- 03:46 AM PST     8.36 feet High Tide
Fri -- 07:06 AM PST     Sunrise
Fri -- 09:05 AM PST     Moonset
Fri -- 10:26 AM PST     0.57 feet Low Tide
Fri -- 03:50 PM PST     8.07 feet High Tide
Fri -- 05:50 PM PST     Sunset
Fri -- 10:00 PM PST     Moonrise
Fri -- 10:42 PM PST     -0.27 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.64.16.488.37.76.34.52.81.40.70.82.14.16.27.68.17.56.14.32.50.9-0.1-0.2

Weather Map and Satellite Images
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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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Wind Forecast for Portland, OR (21,6,7,8)
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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 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.