Thursday, November15, 2018 L-36.com


Marine Weather and Tides
St. Helens, 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 7:10AMSunset 4:40PM Thursday November 15, 2018 3:26 AM PST (11:26 UTC) Moonrise 1:34PMMoonset 11:50PM 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
    EDIT      (on/off)   Help
PZZ210 Columbia River Bar- 300 Am Pst Thu Nov 15 2018
.small craft advisory for rough columbia river bar in effect from 8 am this morning to 1 pm pst this afternoon...
.small craft advisory for rough columbia river bar in effect from this afternoon through this evening...
In the main channel.. * general seas...around 9 ft day then 7 ft later tonight into Friday. * first ebb...around 1030 am Thursday. Seas near 10 ft. * second ebb...around 1030 pm Thursday. Seas near 11 ft * third ebb...around 1130 am Friday. Seas near 10 ft.
PZZ200 300 Am Pst Thu Nov 15 2018
Synopsis for the southern washington and northern oregon coast.. High pressure will strengthen over the pac nw Fri, then shift east of the cascades Fri night and Sat, allowing increasing offshore flow for the weekend.


7 Day Forecast for Marine Location Near St. Helens, OR
   Hourly   EDIT   Help
location: 45.87, -122.8     debug


Area Discussion for - Portland, OR
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kpqr 151051
afdpqr
area forecast discussion
national weather service portland or
250 am pst Thu nov 15 2018

Synopsis Today will be mostly dry and cloudy with northwest flow.

A weak disturbance moving near the area may produce light rain for sw
washington tonight and Friday. Dry weather expected Friday night
through early next week as strong high pressure returns to the area.

East winds will develop Friday night and result in mostly sunny but
cool weather this weekend. Rain is possible mid next week.

Short term Today through Sunday... Low clouds and patchy fog are
filling in along the coast and the interior valleys early this
morning. A building upper level ridge will keep rain well north of
the area today, but a shortwave upper level trough riding over the
ridge may bring periods of light rain to extreme SW washington
tonight through Friday afternoon. The upper ridge strengthens Friday
evening and n-ne winds develop. Mixing at the lower levels will be
poor, especially on Friday and the stagnant air may compromise the
air quality.

East winds increase Saturday morning as models forecast the dalles to
troutdale surface pressure gradient of 7 to 9 mb by 8 am.These winds
will dominate through Sunday limiting fog and low clouds at night,
and supporting dry weather with mostly sunny skies and cool breezes.

Wind gusts of 30 to 35 mph are possible for the east portland metro
area and 65 to 75 mph gusts at crown point. The east winds should
help improve air quality near the cascade gaps and the columbia river
gorge, but poor air quality is likely in areas protected from the
east winds. ~tj

Long term No changes. Previous discussion follows... Sunday night
through Wednesday. The strong upper level ridge over the eastern
pacific shifts inland over the pacific northwest. East winds will
likely persist through the columbia river gorge for the start of next
week, but elsewhere winds will remain rather light which could lead
to stagnant conditions under the developing inversion. This pattern
will remain in place through at least early Tuesday until the next
front arrives, but forecast models diverge more significantly by
midweek. In particular, the deterministic ECMWF is about 24 hours
faster with the next frontal system, bringing it into the region
early Tuesday. Trended the forecast towards the nbm, which better
reflects the timing in the GFS and ensemble mean solutions. This
brings the highest (likely category) pops into the region early
Wednesday. Cullen

Aviation Varied flight conditions across the area with MVFR to
lifr west of the coast range while interior locations have
predominantly MVFR CIGS vis. There are spots of ifr developing
and satellite ifr probably showing about 60 to 80 percent chance
at interior TAF sites. Various MOS guidance also indicating ifr
cigs vis through around 18z so will allow for that in the next
taf package. Should see improvement for the afternoon with MVFR
toVFR conditions. Later tonight into Friday will probably see
areas of ifr returning for the interior. Coastal areas may have
enough offshore wind to remainVFR.

Pdx and approaches... MVFR prevailing with mist and CIGS around
1500-2500 ft in the area. There is still a decent chance
(roughly 60 percent) that CIGS vsbys may lower into the ifr
category through 18z or so. MVFR should continue into the
afternoon and probably return tonight. mh

Marine A ridge of high pressure will lay over the waters into
Friday, then high pressure will strengthen inland for increasing
n-ne flow through the weekend. Some localized gusts 25-30 kt
will be possible in the offshore flow over the weekend, mainly
below gaps in the coastal terrain. Mh
seas around 10 ft will spread across the waters this morning and
is expected to subside below 10 ft this evening. The incoming
west swell is likely to lead to rough columbia river bar
conditions during the ebbs today and tonight.

Pqr watches warnings advisories
Or... None.

Wa... None.

Pz... Small craft advisory for hazardous seas until 8 pm pst this
evening for coastal waters from CAPE shoalwater wa to
florence or out 60 nm.

Small craft advisory for rough columbia river bar from 8 am
this morning to 1 pm pst this afternoon.

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

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 18 mi38 min 50°F1029.5 hPa
ASTO3 - 9439040 - Astoria, OR 56 mi38 min SE 2.9 G 6 48°F 51°F1028.7 hPa
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 63 mi38 min 50°F1028.9 hPa

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
Scappoose Industrial Airpark, OR8 mi33 minN 02.50 miFog/Mist46°F45°F96%1028.8 hPa
Southwest Washington Regional Airport, WA18 mi30 minN 02.50 miFog/Mist42°F41°F96%1030.1 hPa
Pearson Airfield, WA19 mi33 minN 03.00 miFog/Mist48°F45°F89%1028.9 hPa
Portland, Portland International Airport, OR21 mi33 minN 03.00 miFog/Mist47°F45°F93%1029.1 hPa
Portland-Hillsboro Airport, OR24 mi33 minWNW 34.00 miFog/Mist47°F45°F93%1028.9 hPa

Wind History from SPB (wind in knots)
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
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
Last 24hrCalmCalmCalmCalmCalmS3CalmCalmSE4CalmCalmE3SW3SW3CalmCalmCalmCalmN3CalmCalmW3CalmCalm
1 day agoSW4S4S5SW5S44CalmCalmSE6SE5SE6SE6S4S3CalmW3W3CalmSE3CalmCalmCalmCalm3
2 days agoW6W5CalmW3SW3SW3S3S5S5S4S5S6S53S4SW4SW3SW5S5SW5SW5W3SW4SW4

Tide / Current Tables for Saint Helens, Oregon - IGNORE HEIGHTS
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Kalama, Washington - IGNORE HEIGHTS
   EDIT      (on/off)   Help   One Week of Data
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Weather Map and Satellite Images
       (on/off)   HelpWeather Map
wmap_P
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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Portland, OR (6,6,7,8)
      (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.