Saturday, December16, 2017 L-36.com


Marine Weather and Tides
Maywood Park, OR

Version 3.4
What's New / NOTES
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.
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.

Sunrise 7:43AMSunset 4:29PM Saturday December 16, 2017 10:50 AM PST (18:50 UTC) Moonrise 6:02AMMoonset 3:53PM Illumination 3% Phase: Waning Crescent; Moon at 28 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
    EDIT      (on/off)   Help
PZZ210 Columbia River Bar- 855 Am Pst Sat Dec 16 2017
.small craft advisory for rough columbia river bar in effect from 2 pm this afternoon to 6 pm pst this evening...
.small craft advisory for rough columbia river bar in effect late tonight...
In the main channel..Combined seas 6 to 7 ft building to 7 to 8 ft Sunday morning. However, seas will temporarily build to 10 feet during the strong ebb around 330 pm this afternoon and to 10 ft with breakers possible during the weaker ebb around 4 am Sunday.
PZZ200 855 Am Pst Sat Dec 16 2017
Synopsis for southern washington and northern oregon coast.. High pressure remains over the northeast pacific with low pressure over the rockies. A weak front slides mainly across the washington waters late tonight and Sunday. Low pressure drops south from the gulf of alaska Tuesday bringing a strong cold front and probable gales.

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


Area Discussion for - Portland, OR
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kpqr 161729
afdpqr
area forecast discussion
national weather service portland or
929 am pst Sat dec 16 2017

Synopsis Cool cloudy weather will continue into Monday. Light rain
and cascade snow is expected, but mainly north of a tillamook to
mt hood line through Monday. Snow levels will rise to near or
slightly above the cascade passes Sunday afternoon. Rain and cascade
snow becomes more widespread Tuesday and Wednesday as a cold front
moves across the area. Dry but cold weather is expected after
Wednesday.

Short term Today through Monday... There are patches of icy roads
this morning in the willamette valley. The temperatures last night
dipped below freezing shortly after a rain shower causing lingering
water on surfaces to freeze. These icy roads are accompanied by fog
in some areas too. Temperatures should warm above freezing late this
morning.

Light showers mainly north of eugene will decrease today through this
evening. A warm front passing north of the area will produce another
round of light precipitation late tonight through Sunday. Snow levels
will remain around 3000 feet through tonight then rise to above 5500
feet Sunday afternoon. Most of the precipitation will be along the
coast and the higher terrain, and expect very little rain for the
interior valleys. Rain totals will be light, with less than 0.25 inch
for the higher terrain and less than 0.10 inch for the interior
valleys. Overnight temperatures in the interior low lands should be
warmer tonight (above freezing) with daytime highs on Sunday in the
upper 40s.

Showers will linger mainly over southwest washington and along the
coast Sunday night through Monday as the warm front stalls across
washington state. ~tj

Long term No changes. Previous discussion follows... Monday night
through Friday... We start next week under relatively flat, zonal flow
with a broad ridge off the coast of california and an approaching
trough coming out of the gulf of alaska. We will see our first
widespread rain in a while with this system starting Tuesday morning
and continuing through Wednesday morning, with rainfall amounts
around an inch for most of the area. Snow levels will be falling
through this event, starting around 5000-5500 ft Tuesday morning, and
falling to around 1500 ft by Wednesday morning. Showers will be
tapering off midday Wednesday. 1000-500-mb thicknesses drop down to
523 dam, and 850 temps only lower down to -4c while precip is
falling, indicating no chance for snow down to the valley floor with
this system, though locations in the cascade foothills and coast
range could see a dusting of snow down to 1500 ft on Wednesday as
precip is coming to an end. Good news for skiers is that with ~1 inch
of liquid equivalent, and snow levels starting around 5500 ft, the
resorts could see a foot of snow with this system.

Beyond Wednesday, ridging builds back up over the eastern
pacific and along the west coast. Ensemble members generally agree
on some sort of a ridge over the eastern pacific, though the exact
positioning is in flux. Most models suggest another dry spell
continuing into the weekend, with the return of east winds. Only
difference from this last dry spell may be that model temperatures
in the columbia basin are looking a little colder, suggesting colder
air filtering into the willamette valley as we go into next weekend.

-mccoy

Aviation Conditions are gradually improving with the taf
terminals a mix of MVFR andVFR, except for high end ifr vsbys
at khio. Do expect a broad improvement as a warm front, but many
areas may still flirt with MVFR CIGS at at times through the
evening. Warm frontal rain arrives later this evening and
overnight which appear to drop vsbys back down to ifr for many
areas across the north. Thinner cloud cover across the south may
bring a return to lifr under fog low stratus south of ksle,
including keug at or after 09z lasting through much of Sunday
morning.

Pdx and approaches... CurrentlyVFR conditions however, an advancing
warm front may keep CIGS bouncing down to MVFR at times. Have
very low confidence, however. Most likely scenario is CIGS will
remainVFR through this evening with lower CIGS likely to
obscure the cascade terrain through the evening. Then have
higher confidence CIGS will lower around 05z as rain pushes over
the field overnight tonight through early Sunday. Jbonk

Marine Not many changes for the morning update package. Square
seas are holding on a little longer across the northern waters so
decided to extend the SCA for seas until about noon. Jbonk
previous discussion follows: high pressure offshore bringing nw
winds across the waters this morning. Winds will back later today
as a warm front approaches. South to southwest winds increase
tonight with gusts to 25 kt expected west in zone pzz270. May see
wind gusts to 25 kt over pzz250 sun. A stronger front is modeled
to arrive on tue, and looks like it has the potential to bring
gale force winds. Another front may arrive wed. Then weak
offshore flow is expected to develop in the late week time
period.

Seas are sitting just 8 to 9 ft and are slowly subsiding. However
with periods around 8 to 10 seconds, choppy steep seas are
occurring. Seas will continue to subside through the morning.

Seas remain in the 5-7 ft range later today through mon. The
stronger Tue front will likely push seas into the low to mid
teens before they drop off again during the second half of the
week. Mh

Pqr watches warnings advisories
Or... None.

Wa... None.

Pz... Small craft advisory for winds from midnight tonight to 7 am
pst Sunday for waters from CAPE shoalwater wa to cascade
head or from 10 to 60 nm.

Small craft advisory for hazardous seas until noon pst today
for coastal waters from CAPE shoalwater wa to cascade head
or out 60 nm.

Small craft advisory for rough columbia river bar from 2 pm
this afternoon to 6 pm pst this evening.

Small craft advisory for rough columbia river bar from 2 am to
5 am pst Sunday.

Interact with us via social media:


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 41 mi51 min 44°F1029.2 hPa (+1.9)
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 73 mi51 min 51°F1029.1 hPa (+1.4)
ASTO3 - 9439040 - Astoria, OR 77 mi51 min E 2.9 G 4.1 44°F 1027.6 hPa (+1.0)

Wind History for Longview, WA
(wind in knots)    EDIT      (on/off)   Help
Last
24hr
1 day
ago
2 days
ago

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Portland, Portland International Airport, OR3 mi58 minSE 610.00 miOvercast42°F39°F89%1029.1 hPa
Pearson Airfield, WA6 mi58 minSE 37.00 miOvercast42°F39°F92%1028.9 hPa
Portland, Portland-Troutdale Airport, OR9 mi58 minSE 39.00 miOvercast43°F39°F89%1029 hPa
Scappoose Industrial Airpark, OR20 mi58 minN 04.00 miFog/Mist37°F37°F100%1029.1 hPa
Portland-Hillsboro Airport, OR22 mi58 minN 01.75 miFog/Mist35°F33°F93%1029.3 hPa

Wind History from PDX (wind in knots)
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
Last 24hrS5CalmCalmE3NE4S3E5E5SE3CalmCalmSE4E5E4E5E3E4E5SE5CalmSE6SE5SE6SE6
1 day agoE13E14SE12SE11SE11SE12SE10SE13SE10SE11SE9SE11SE8NE4E5E6SE6E3E5CalmE7CalmCalmE9
2 days agoCalmCalmNW43SE8SE10SE12SE13SE14SE12SE8SE14SE10SE15E12NW4NE4SE10
G14
3E6
G16
E10E5E11
G20
E16

Tide / Current Tables for Ellsworth, Washington - IGNORE HEIGHTS
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
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

Sat -- 02:10 AM PST     0.07 feet Low Tide
Sat -- 06:02 AM PST     Moonrise
Sat -- 06:28 AM PST     7.62 feet High Tide
Sat -- 07:44 AM PST     Sunrise
Sat -- 01:50 PM PST     2.91 feet Low Tide
Sat -- 03:52 PM PST     Moonset
Sat -- 04:27 PM PST     Sunset
Sat -- 05:55 PM PST     9.39 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.50.50.10.72.95.67.47.57.16.35.44.53.73.12.94.16.48.69.498.16.85.23.7

Tide / Current Tables for Vancouver, Washington - IGNORE HEIGHTS
   EDIT      (on/off)   Help   One Week of Data
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

Sat -- 01:45 AM PST     0.07 feet Low Tide
Sat -- 06:02 AM PST     7.62 feet High Tide
Sat -- 06:02 AM PST     Moonrise
Sat -- 07:45 AM PST     Sunrise
Sat -- 01:25 PM PST     2.91 feet Low Tide
Sat -- 03:53 PM PST     Moonset
Sat -- 04:27 PM PST     Sunset
Sat -- 05:29 PM PST     9.39 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
10.30.11.54.16.57.67.46.85.954.13.433.257.49.19.38.77.66.14.63

Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of PacificNorthwest    EDIT
Geos

Wind Forecast for Portland, OR (13,3,4,5)
      (on/off)   Help

Ground Weather Radar Station Portland, OR
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.