Tuesday, March28, 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 6:53AMSunset 7:36PM Tuesday March 28, 2017 6:47 AM PDT (13:47 UTC) Moonrise 6:35AMMoonset 7:33PM Illumination 1% Phase: Waxing Crescent; Moon at 1 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- 316 Am Pdt Tue Mar 28 2017
.small craft advisory for rough columbia river bar in effect through this evening...
In the main channel..Combined seas 10 to 12 ft through Tue evening. However...seas will temporarily build to near 14 ft with breakers during the strong ebb around 545 am this morning. Seas to 17 ft...with breakers...can be expected during the strong ebb around 6 pm this evening.
PZZ200 316 Am Pdt Tue Mar 28 2017
Synopsis for southern washington and northern oregon coast.. A warm front moves through the waters this morning. Then a cold front will move into the waters and stall later today. A low pres area will develop along this front late tonight and early Wed. The cold front moves across the waters and onshore Wed. High pres builds over the ne pac Thu and Fri...remaining through at least the first half of the weekend.

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 281017
afdpqr
area forecast discussion
national weather service portland or
317 am pdt Tue mar 28 2017

Synopsis A warm front approaching wa and northern or will
bring increasing chances for rain to the region today and tonight. A
cold front will move SE through or wed, turning rain into showers
wed and Wed night. Showers will continue through thu, but drier
weather is in store for Fri as a ridge of high pres moves across.

Short term (today through Thursday)... A surface ridge of hig pres
over western oregon early this morning is expected to shift into
southern oregon today and tonight. This will eventually deepen the
onshore flow and moisture over the region. A warm front is expected
to approach the region late tonight as a low pres center heads up
towards vancouver island Wed morning. Isentropic lift will increase
and lower ahead of the warm front. Today, the moist isentropic lift
will tend to be weak and primarily confined to mid levels. Prefer to
keep some mention of light precipitation over all but the far
southern part of the forecast area given the current distributution
of light rain over the area and the weak lift. Tonight pops quickly
increase to categorical as models develop stronger moist isentropic
lift with a strengthened SW flow on the order of 40 to 50 kt along
the 290k isentrope just a few thousand feet msl. With plenty of
clouds and the approach of the warm front, temps should remain mild
tonight with snow levels rising well above cascade passes by wed
morning.

Models agree on dragging the trailing cold front SE through the
forecast area Wed and Wed evening. With deep moisture preceding the
front chances for rain will remain categorical Wed morning, then
remain high across the south part of the area Wed afternoon and
evening as the baroclinic zone may be a little slow to clear the
region as the front becomes closer to parallel with the upper flow.

Behind the front a cooler air mass moves in, with the cold upper
trough moving through late Wed night into Thu morning. Expect
showers to become more orographically favored once the upper trough
passes Thu morning.

Long term (thu night through Monday)... No changes. Previous
discussion follows. Model agreement is better through Fri and sat,
with a more progressive pattern over the region. Models continue to
show ridging over the region by fri, with dry and mild temperatures.

Still differences in the models, but will maintain dry weather into
sat. But, will trend back to some chance of showers for Sat night
and Sun as will see another front shift across the region at that
time. With the progressive pattern, will see fronts moving across
the region about every 2 days. So, after Sunday, will transition to
another decreasing shower day on Monday, with potentially another
dry day or two to start next week. However, since it is spring and
mother nature can get feisty at times, will keep some mention of
showers to start next week. /mh rockey.

Aviation A warm front moving onshore this morning will bring
light rain or drizzle and a mix ofVFR and MVFR to SW washington
and far NW oregon this morning. Kast and the northern willamette
valley tafs will likely drip to MVFR at times. Conditions should
become mainlyVFR behind the frontal passage by around 15z as the
rain lifts north of the fcst area. The trailing cold front will
move through from NW to SE late tonight into Wed morning. This
will likely bring widespread MVFR conditions.

Kpdx and approaches... Light rain or drizzle and occasional MVFR
cigs expected through around 15z with a warm front approaching.

Conditions improve after 15z withVFR expected through the rest
of today. Rain will increase again between 06z-12z wed, with
conditions likely deteriorating to MVFR. Pyle

Marine A warm front is moving through the waters this morning.

The trailing cold front will move into the waters later today and
stall. Expect persistent small craft advisory southerly winds
through tonight, with winds generally 20 to 25 kt with gusts to
35 kt. A low will form along the stalled frontal boundary and
approach the waters from the southwest late tonight into wed
morning. The fcst models continue to indicate that the low will
strengthen winds further, with gusts to 35 kt possible overnight.

Have issue a gale watch from late this evening through wed
morning. The cold front will move onshore during the day wed, and
winds will turn westerly and subside behind the front. High pres
will build in Thu and remain through at least the first half of
the weekend. This will bring a period of benign weather with
northerly winds over the waters.

Seas will remain 13 to 15 ft through wed. Hanson plots and
spectral guidance suggest a 11 to 12 second swell set and a
longer-period 17 to 18 second swell train through today. Then the
longer period swell will take over wed. Seas drop below 10 ft thu
and remain low through the next few days. Pyle

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

Wa... None.

Pz... Gale watch from this evening through Wednesday morning for
coastal waters from CAPE shoalwater wa to florence or out
60 nm.

Small craft advisory for winds until 10 pm pdt this evening for
coastal waters from CAPE shoalwater wa to florence or out
60 nm.

Small craft advisory for hazardous seas until 10 pm pdt this
evening for coastal waters from CAPE shoalwater wa to
florence or out 60 nm.

Small craft advisory for rough columbia river bar until 11 pm
pdt 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 41 mi48 min 45°F1025.2 hPa (-0.8)
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 73 mi48 min 50°F1025.5 hPa (-0.6)
ASTO3 - 9439040 - Astoria, OR 77 mi48 min S 8.9 G 13 48°F 46°F1023.6 hPa (-1.0)

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Portland, Portland International Airport, OR3 mi55 minS 710.00 miOvercast47°F39°F77%1026.5 hPa
Pearson Airfield, WA6 mi55 minVar 610.00 miOvercast48°F42°F80%1026.3 hPa
Portland, Portland-Troutdale Airport, OR9 mi55 minSSE 510.00 miOvercast47°F42°F83%1026.8 hPa
Scappoose, Scappoose Industrial Airpark, OR20 mi55 minSSE 710.00 miOvercast47°F42°F83%1025.6 hPa
Portland, Portland-Hillsboro Airport, OR22 mi55 minS 1010.00 miOvercast46°F42°F86%1025.9 hPa

Wind History from PDX (wind in knots)
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Last 24hrS8S6S7SW9S10S11SW13SW10W8SW9W13SW8SW10SW10SW7S8SW7S6S6S7SE7S10S8S7
1 day agoSE7S10SE8E10E11SE11SE11SE13SE10E13SE12SE10CalmCalmCalmCalmE6S7SW7S6S8S6S10S9
2 days agoS5S5S8S9SW8W7SW5W5SW10SW10NW9NW6W8CalmCalmNW4CalmCalmSE8SE9E8E8E8E10

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

Tue -- 04:16 AM PDT     0.20 feet Low Tide
Tue -- 06:57 AM PDT     Sunrise
Tue -- 07:34 AM PDT     Moonrise
Tue -- 08:33 AM PDT     8.88 feet High Tide
Tue -- 04:43 PM PDT     0.32 feet Low Tide
Tue -- 07:33 PM PDT     Sunset
Tue -- 08:32 PM PDT     Moonset
Tue -- 08:52 PM PDT     8.69 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.531.70.70.20.83.36.48.58.88.26.95.43.82.31.20.50.42.25.27.88.78.37.2

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

Tue -- 03:52 AM PDT     0.20 feet Low Tide
Tue -- 06:57 AM PDT     Sunrise
Tue -- 07:35 AM PDT     Moonrise
Tue -- 08:07 AM PDT     8.88 feet High Tide
Tue -- 04:18 PM PDT     0.32 feet Low Tide
Tue -- 07:34 PM PDT     Sunset
Tue -- 08:26 PM PDT     8.69 feet High Tide
Tue -- 08:32 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.82.41.20.40.21.74.67.58.98.67.76.34.73.21.80.80.30.93.46.58.48.67.96.6

Weather Map and Satellite Images
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Weather Map
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IR Satellite Image from GEOS
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GOES Local Image of PacificNorthwest    EDIT
Geos

Wind Forecast for Portland, OR (9,2,3,4)
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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.