Thursday, March23, 2017 L-36.com


Marine Weather and Tides
Maywood Park, 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 7:03AMSunset 7:29PM Thursday March 23, 2017 2:59 PM PDT (21:59 UTC) Moonrise 3:44AMMoonset 1:45PM Illumination 14% Phase: Waning Crescent; Moon at 26 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- 241 Pm Pdt Thu Mar 23 2017
.small craft advisory for rough columbia river bar in effect from 9 pm pdt this evening through late tonight...
In the main channel..7 ft early this evening building to 10 ft by late evening...then subsiding to 6 ft again Fri. However...seas will temporarily build to 11 ft with breakers possible during the ebb around 3 am tonight...and to 10 ft with breakers possible during the ebb around 315 pm Fri afternoon.
PZZ200 241 Pm Pdt Thu Mar 23 2017
Synopsis for southern washington and northern oregon coast.. A cold front will move east across the coastal waters this evening bringing gales force winds. Winds will decrease behind the front later tonight and Fri. High pressure will bring quieter weather Fri night through Sat night. Another strong front returns higher wind and seas Sun.

7 Day Forecast for Marine Location Near Maywood Park, OR
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location: 45.6, -122.55     debug


Area Discussion for - Portland, OR
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Fxus66 kpqr 231639
afdpqr
area forecast discussion
national weather service portland or
939 am pdt Thu mar 23 2017

Synopsis Weak high pressure overhead will keep conditions mostly
dry this morning under cloudy skies. The next occluding pacific
frontal system will spread rain across southwest washington and
northwest oregon later this afternoon into tonight, with showers and
perhaps a couple thunderstorms lingering into Friday. Higher pressure
will cause showers to taper off later Saturday, but the next frontal
system will likely bring more rain Sunday followed by showers Monday.

Occasionally wet weather is expected to linger through the middle of
next week, with temps fairly typical for late march. Snow levels will
occasionally dip below cascade pass level, but the more significant
accumulations will likely stay up toward the higher ski resort
elevations.

Short term Today through Saturday... Weak high pressure will
continue to move across southwest washington and northwest oregon
this morning bringing mostly dry conditions. Meanwhile, visible
satellite imagery reveals abundant mid and high clouds streaming over
the forecast area ahead of the next frontal system which looks to
arrive at the coast early this afternoon and push inland this
evening. No significant changes were made to the forecast this
morning as things remain on track. /64
remainder of the previous discussion (issued at 316 am Thursday)
follows... The approaching frontal system has a tap to subtropical
moisture just north of hawaii, but the deepest moisture plume of
1.25-1.50 precipitable water values remains 35n southward. Models
continue to aim the axis of deepest moisture and heaviest QPF south
of our forecast area this evening, focusing instead on the or/ca
border region as a triple point develops along the approaching front.

While the heaviest rain is expected to stay to our south, there will
probably be a decent period of light to moderate rain spreading
onshore around 3-4 pm. The 00z wrf-arw fcst reflectivity then shows
rain spreading across the willamette valley just in time for this
evening's rush hour... Continuing all the way through this evening
before the main front pushes across the forecast area late tonight or
early Fri morning.

The 06z NAM shows a decent ribbon of 60-65 kt s-sw 850 mb winds with
the front this evening, but gradients will likely remain too offshore
for wind gusts much higher than 40-50 mph along the coast. As
mentioned above, a triple-point is expected to develop along the
front this evening near CAPE blanco, which would probably keep the
strongest wind south of lane county. The wave of low pressure
associated with this triple point will ride NE along the front, which
is likely what will keep rain fairly steady throughout tonight.

The upper trough associated with this system will start to push
onshore Friday, with the 00z ECMWF swinging a decent vortmax through
during the midday and afternoon hours fri. This shortwave will likely
be the leading edge of the cold pool aloft... With the 06z GFS showing
500 mb temps down to -27 deg c Fri afternoon. Given some sunbreaks,
this could be enough to support some deep but skinny CAPE and li's in
the 0 to -2 deg c range. 0-3 km shear profiles look fairly decent for
the coast and willamette valley Friday, so any cells that develop in
the 200-500 j/kg of CAPE Fri afternoon could be robust despite only
having tops around 20 kft. Based on all this, we decided to add a
slight chance of thunder for all but the cascades Fri afternoon and
evening.

Higher pressure and warming temps aloft should cause convection to
become less robust Saturday, though there will probably still be
plenty of showers around. Expect showers to begin tapering off sat
afternoon, then coming to an end Sat night as subsidence and a
stabilizing air mass take over.

Snow levels - on average - should be just above the cascade passes
tonight and Friday. As the secondary shot of cold air comes in fri
afternoon and evening, expect snow levels to lower to around 3000 ft
with some minor accumulation possible on the passes Fri night/sat.

More significant accumulations are likely above 5000-5500 ft, where
around 3-6 inches of snow are expected. Weagle

Long term No changes. Previous discussion follows... 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... With post-frontal showers
continuing into Monday. 00z gfs/ecmwf and most of their ensembles are
trending wetter for midweek, as the overall pattern remains
progressive and another frontal system pushes onshore Tue night or
wed. It does appear this system will dive SE toward the great basin,
but the ridging behind it remains flat on both the 00z ECMWF and gfs.

This seems to indicate that models are becoming less bullish on
drying us out late next week... As the flat ridging would probably
lend to a continued progressive pattern across the NE pac through the
end of next week. Overall, expect generally more of the same for the
next 7-10 days, with occasional rain and temperatures remaining
within a few degrees of typical late march values. Weagle/cullen

Aviation Vfr conditions along the coast are likely to give way
to MVFR conditions after 01z this evening as a cold front spreads
rain in. In the interior,VFR conditions are expected to remain
dominant today into tonight. There is a chance though for areas of
MVFR conditions to develop mainly after 03z tonight as rain spreads
in.

Kpdx and approaches...VFR conditions through 03z this evening. After
03zVFR remains the most likely condition overnight, but there is a
chance for seeing temporary MVFR conditions associated with rain
spreading inland this evening.

Marine A cold front will approach the waters today, and move e
across the waters this evening. South winds are expected to increase
to gale force over the outer waters today, peak this evening then
diminish late tonight. Nearshore waters will be a little slower to
increase to gale force, probably late this afternoon, then peak late
this evening. Steep seas will increase late today and this evening
in response to the increasing winds, generally building to a peak in
the 12 to 15 ft range, before subsiding again late tonight and early
fri. Behind the front west winds gusting over 20 kt are likely to
continue into fri. A ridge of high pres moves slowly east across the
coastal waters Fri night through Sat night for quieter weather.

Sun another cold front approaches from the west, increasing winds
again. Winds with this system expected to gusts as high as 30 to 35
kt late sun.

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

Wa... None.

Pz... Gale warning until 3 am pdt Friday for waters from cape
shoalwater wa to florence or from 10 to 60 nm.

Gale warning from 5 pm this afternoon 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 8 pm
this evening to 5 am pdt Friday.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 41 mi41 min 45°F1015.8 hPa
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 73 mi41 min 50°F1014.6 hPa
ASTO3 - 9439040 - Astoria, OR 77 mi41 min NNE 1 G 2.9 51°F 45°F1014.4 hPa

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Portland, Portland International Airport, OR3 mi66 minENE 810.00 miMostly Cloudy54°F34°F47%1016.4 hPa
Pearson Airfield, WA6 mi66 minESE 710.00 miOvercast54°F37°F53%1016.3 hPa
Portland, Portland-Troutdale Airport, OR9 mi66 minE 810.00 miOvercast56°F37°F49%1016.4 hPa
Scappoose, Scappoose Industrial Airpark, OR20 mi66 minSE 1110.00 miOvercast54°F37°F55%1016.1 hPa
Portland, Portland-Hillsboro Airport, OR22 mi66 minN 010.00 miOvercast53°F37°F55%1016.1 hPa

Wind History from PDX (wind in knots)
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Last 24hrSW12W12W13W11W7W8W5CalmCalmSE4E4SE6E3E6SE7SE7E7SE11E10E11E11E4E8E8
1 day agoE10SE11SE12SE10CalmE12SE14SE12E16SE13SE10SE8SE9SE3SE8SE8SE9E9S13
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2 days agoE12E9SE10E16E11E15E13S3SE5E6SE7SE14E8SE10SE11NW4SE4SE18SE19SE13SE13E14E13SE10

Tide / Current Tables for Ellsworth, Washington - IGNORE HEIGHTS
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Ellsworth
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 -- 12:35 AM PDT     1.20 feet Low Tide
Thu -- 04:43 AM PDT     Moonrise
Thu -- 05:14 AM PDT     6.65 feet High Tide
Thu -- 07:06 AM PDT     Sunrise
Thu -- 12:35 PM PDT     3.34 feet Low Tide
Thu -- 02:44 PM PDT     Moonset
Thu -- 04:31 PM PDT     7.49 feet High Tide
Thu -- 07:27 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.31.32.345.66.66.56.15.54.84.23.73.43.54.66.27.37.476.25.1432.1

Tide / Current Tables for Vancouver, Washington - IGNORE HEIGHTS
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Vancouver
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 -- 12:10 AM PDT     1.20 feet Low Tide
Thu -- 04:44 AM PDT     Moonrise
Thu -- 04:48 AM PDT     6.65 feet High Tide
Thu -- 07:07 AM PDT     Sunrise
Thu -- 12:10 PM PDT     3.34 feet Low Tide
Thu -- 02:45 PM PDT     Moonset
Thu -- 04:05 PM PDT     7.49 feet High Tide
Thu -- 07:27 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.21.634.76.26.66.45.95.24.643.63.33.85.36.87.57.36.75.84.63.62.61.7

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of PacificNorthwest    EDIT
Geos

Wind Forecast for Portland, OR (17,4,5,8)
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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.