Saturday, March24, 2018

Marine Weather and Tides
Felida, WA

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.

Sunrise 7:04AMSunset 7:29PM Friday March 23, 2018 11:30 PM PDT (06:30 UTC) Moonrise 10:07AMMoonset 12:26AM Illumination 49% Phase: First Quarter Moon; Moon at 7 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- 249 Pm Pdt Fri Mar 23 2018
In the main channel..Combined seas around 6 ft through Saturday. However, seas will temporarily build to 8 ft during the ebb around 1015 pm this evening, and to 9 ft during the ebb around 1045 am Saturday.
PZZ200 249 Pm Pdt Fri Mar 23 2018
Synopsis for southern washington and northern oregon coast.. Broad upper level low pressure will remain offshore bringing Thunderstorms through Saturday before it weakens and moves south of the waters on Sunday. Am embedded compact low will move se just south of the waters Saturday mainly affecting the oregon central outer waters. Weak high pressure builds in later Sunday through much of next week. Thermal low pressure will develop over northern california toward the middle of next week, bringing northerly winds.

7 Day Forecast for Marine Location Near Felida, WA
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location: 45.73, -122.75     debug

Area Discussion for - Portland, OR
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Fxus66 kpqr 240320
area forecast discussion
national weather service portland or
821 pm pdt Fri mar 23 2018

Synopsis Showers will continue through the weekend with snow
levels primarily above 1000 feet. However, these snow levels may drop
to around 500 feet during the morning hours each morning. There will
be a chance of thunder at times especially near the coast through
Saturday, and possibly inland at times in the afternoons and
evenings. An upper ridge will build in the NE pacific early next week
with brief periods of light precipitation possible. The driest period
will be the middle portion of the week.

Short term Today through Monday... Snow levels still appear to be
in the order of 1000 ft, although some locations mainly in the coast
range and briefly in the south willamette valley earlier this
evening were lower. Water vapor images this evening showed a strong
shortwsve approaching the oregon coast, while a vort MAX was headed
towards the north ca coast. Precipitation ahead of the short wave,
which should cross the forecast area during the overnight hours,
should begin to taper off in the next few hours. With the vort max
headed to the south of the region, the focus for heavier
precipitation should shift south. A SW onshore flow will continue
overnight, so ultimately expect the shower activity to become a
little more orographic in nature. Will hang on to the existing
winter weather advisories, but will tone down the additional
accumulation numbers. For the low elevation zones with temps already
largley in the range of 35 to 40, there remains the possibility for
snow flakes mixing in almost anywhere, but any notable accumulations
appear likely to remain above 750 to 1000 ft elevations.

Remainder of short term discussion unchanged. Expect snow levels to
quickly rise above 1000 feet again by mid morning tomorrow which
will eliminate any risk for low level snow.

Showers will continue through the day Saturday and Saturday night and
Sunday morning will provide another opportunity for snow levels to
drop below 1000 feet. However, precipitation rates will be light
which may be an inhibiting factor for snow reaching to near
sea-level. However, any periods of clearing could also make lower
snow levels a possibility.

Showers will continue Sunday and Monday, but snow should be limited
to areas above 1500 feet as the cold upper trough starts to shift
east of the area. Bentley

Long term Monday night through Friday... No changes. Previous
discussion follows. An upper ridge will dominate much of the long
term period, however, our area will remain on the southern edge of
the "ridge runner" weak disturbances which will be traversing the
ridge. This will keep at least a slight chance for precipitation
most days, and the upper clouds will limit the warming that may be
seen otherwise. However, temperatures are still expected to warm
into the upper 50s to lower 60s. The best chance for a completely
dry day next week still appears to be Thursday. Beyond this ridge,
models are in agreement with a longwave trough re-establishing
across the pacific nw. This would keep the cool pattern well into
april with additional chances for late season foothill snow, and
below normal temperatures. Bentley &&

Aviation An upper level low and associated cool and showery
air mass remain off the pac NW coast through the weekend. Current
radar imagery shows the heaviest showers moving north of ksle as
of 0230z, with slightly weaker showers to the south. Conditions
across the forecast area remain predominately MVFR this evening,
with a pocket ofVFR CIGS across the north coast. Expect little
change for the rest of the evening as an embedded shortwave
trough brings another round of organized shower activity to the
region from south to north. Widespread MVFR conditions are
expected later this evening under steadier showers, with some
localized ifr not out of the question. Showers will continue into
the overnight hours, but should become more scattered towards
sat morning. Expect MVFR CIGS to remain through most of sat
morning for a good portion of the area. Conditions likely improve
toVFR Sat afternoon and evening, with occasional MVFR under
scattered showers. There is a chance of thunderstorms at the
coast through the next 24 hrs, with the best chances during the
evening and early overnight hours. The chance of thunderstorms
spreads inland Sat afternoon.

Pdx and approaches... Expect predominately MVFR conditions under
steadier showers through much of tonight. The showers should
taper off somewhat by Sat morning, but MVFR likely persist
through much of the morning. Conditions look to becomeVFR sat
afternoon, with brief periods of MVFR possible under scattered
showers. There is a chance of thunderstorms Sat afternoon and
evening. 64 pyle

Marine Broad and showery low pressure will remain off the pac
nw coast through the weekend. Southwesterly winds should subside
to well below 20 kt this evening and through much of the
overnight period. However, a decaying surface low is modeled to
dive SE toward the southern or coast overnight into sat. There
has been some concern that this system will bring gale force
winds to the central or waters. However, based on the latest
model runs, decided to drop the gale watch and go with a small
craft advisory for all of the waters starting early Sat morning.

The models are showing some boundary layer winds in the 30-35 kt
range in the far southern portions of pzz255 pzz275. So there
could be some isolated gale gusts south of newport, but do not
think that they will be frequent enough for a gale warning. Also,
the small craft advisory winds will likely only extend to the
southern portions of pzz250 pzz270. North of around tillamook
head, it looks like winds will remain e-se at 10-15 kt.

Winds will subside later Sat and Sat night as the low weakens and
moves onshore. Another weak surface trough is expected to move
through the waters sun, but may not even be strong enough to
produce small craft winds. Then higher pressure builds over the
ne pac for most of next week, which will lead to a period of much
more benign conditions. A thermal trough is expected to build
into northern ca towards the middle of next week, which will
bring northerly winds to the waters.

Seas will remain a mix of NW swell and fresh S swell through sat.

They are expected to remain in the 10-12 ft range into this
evening. They may then briefly drop just below 10 ft overnight,
before increasing into the 10-12 ft range again for much of sat.

They then subside well below 10 ft Sun and remain below 10 ft for
most of next week. Pyle

Pqr watches warnings advisories
Or... Winter weather advisory until 5 am pdt Saturday for cascades in
lane county.

Winter weather advisory until 1 am pdt Saturday for cascade
foothills in lane county-central coast range of western
oregon-coast range of northwest oregon-northern oregon
cascade foothills-northern oregon cascades.

Wa... None.

Pz... Small craft advisory for winds from 5 am to 5 pm pdt Saturday
for coastal waters from CAPE shoalwater wa to florence or
out 60 nm.

Small craft advisory for hazardous seas until 5 pm pdt Saturday
for coastal waters from CAPE shoalwater wa to florence or
out 60 nm.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 28 mi43 min 44°F1008.8 hPa
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 63 mi49 min 49°F1009 hPa
ASTO3 - 9439040 - Astoria, OR 63 mi43 min ESE 1.9 G 1.9 45°F1008 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, OR7 mi38 minN 010.00 miLight Rain37°F35°F93%1008.6 hPa
Pearson Airfield, WA9 mi38 minW 39.00 miLight Rain38°F36°F93%1008.7 hPa
Portland, Portland International Airport, OR11 mi38 minW 59.00 miLight Rain39°F36°F89%1008.8 hPa
Portland-Hillsboro Airport, OR17 mi38 minW 37.00 miLight Rain35°F33°F93%1008.9 hPa
Portland, Portland-Troutdale Airport, OR22 mi38 minWSW 67.00 miLight Rain39°F37°F93%1008.7 hPa

Wind History from SPB (wind in knots)
Last 24hrS9
1 day agoSE7SW3CalmS4CalmSW4E6S4S4S3S5S3SW8
2 days agoCalmCalmNW4NW3W3W3W3W3N3CalmCalmCalmCalmSE5SE3SE3SE3SE3CalmCalmCalmSW3CalmSE4

Tide / Current Tables for Knapp Landing, Washington - IGNORE HEIGHTS
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Knapp Landing
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

Sat -- 02:31 AM PDT     Moonset
Sat -- 07:06 AM PDT     Sunrise
Sat -- 07:13 AM PDT     2.90 feet Low Tide
Sat -- 08:35 AM PDT     First Quarter
Sat -- 11:11 AM PDT     8.48 feet High Tide
Sat -- 12:00 PM PDT     Moonrise
Sat -- 07:29 PM PDT     Sunset
Sat -- 08:36 PM PDT     0.56 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

Sat -- 12:56 AM PDT     6.57 feet High Tide
Sat -- 02:31 AM PDT     Moonset
Sat -- 07:06 AM PDT     Sunrise
Sat -- 08:01 AM PDT     2.90 feet Low Tide
Sat -- 08:35 AM PDT     First Quarter
Sat -- 12:00 PM PDT     Moonrise
Sat -- 12:11 PM PDT     8.48 feet High Tide
Sat -- 07:29 PM PDT     Sunset
Sat -- 09:24 PM PDT     0.56 feet Low Tide
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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Wind Forecast for Portland, OR (2,6,7,8)
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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 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.