Sunday, May28, 2017 L-36.com


Marine Weather and Tides
Cohassett Beach, WA

Version 3.4
What's New / NOTES
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 5:23AMSunset 9:01PM Sunday May 28, 2017 1:40 AM PDT (08:40 UTC) Moonrise 7:39AMMoonset 11:03PM Illumination 8% Phase: Waxing Crescent; Moon at 3 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
PZZ110 Grays harbor bar- 901 pm pdt Sat may 27 2017 combined seas 2 to 4 ft...except 5 ft during the very strong ebb Sunday morning. Bar conditions light. The maximum ebb currents will occur around 715 am and 745 pm Sunday. PZZ100 901 Pm Pdt Sat May 27 2017
Synopsis for the northern and central washington coastal and inland waters..Light onshore flow will become nearly flat or neutral overnight before becoming onshore again Sunday afternoon. Stronger onshore flow is expected Sunday night through Tue.

7 Day Forecast for Marine Location Near Cohassett Beach, WA
   Hourly   EDIT   Help
location: 46.88, -124.08     debug


Area Discussion for - Seattle, WA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 ksew 280426
afdsew
area forecast discussion
national weather service seattle wa
926 pm pdt Sat may 27 2017

Synopsis A strong upper level ridge over western washington
will move slowly east into eastern washington Sunday and memorial
day. It will remain clear and warm in the interior while shallow
marine moisture affects the coastal zones. Increasing onshore
flow will cool temperatures starting on Tuesday and southerly flow
aloft will bring a chance of showers to the area. Weak
disturbances may bring a chance of showers to the area into the
end of the week.

Short term A strong upper level ridge is sitting over western
washington this evening. At the surface, high pressure is seen
over the offshore waters while a weak thermally induced trough
sits from the southern cascades southward into northeastern
california. Satellite imagery shows clear skies over the interior
of western washington. Shallow and locally dense fog can be seen
from around CAPE flattery southward along the immediate coastline
to just east of westport and down onto the oregon coast. The fog
and stratus will develop inland about 25 miles or so late tonight
into early Sunday morning then burn back to the coastline during
the afternoon hours. High temperatures in the interior on Sunday
will be up to a couple degrees higher than today in the interior
and a few degrees cooler on the coast.

The incoming GFS looks stronger with the onshore flow for Sunday
night and Monday. This is somewhat at odds with the earlier gfs
solutions and with the ecmwf, though with the increasing thermal
gradients between the coast and the interior make the forecast
pressure gradients plausible. But the slower ECMWF may also be
correct. Forecast models always have a very hard time forecasting
the details of a shallow marine layer offshore and its progression
inland, especially when upper level forcing is weak with a slowly
eastward moving ridge. At this time the forecast shows stratus
and fog spreading further inland, into the strait of juan de fuca
and into the chehalis gap, late Sunday night into Monday as
pressure gradients become increasingly onshore over the next day
and a half. If the GFS is correct, it could spread further inland
and be a bit deeper. The forecast shows high temperatures on
memorial day are now about 5 degrees cooler than Sunday. The
incoming gfs, if correct, would indicate a bigger cool down near
the puget sound westward, but still rather warm to hot near the
cascades and in the cascade valleys.

Expect strong inflow through the gaps in the terrain and the
strait of juan de fuca by Monday evening. This will result in a
deep marine layer and good cooling for Tuesday. Southerly flow
aloft and height falls associated with an approaching shortwave
trough will give an increasing chance of showers to the area
Tuesday or Tuesday night, and there could be a few thunderstorms
as well.

Gridded forecasts were massaged to account for the fog and low
clouds through the strait of juan de fuca and onto the coast this
evening. Otherwise the short term forecasts are reasonable for
now. Albrecht

Long term From the previous long term discussion: a chance of
showers will linger with cooler temps and marine air mass. The
best chance of showers may turn out to be Tuesday night and
Wednesday as a shortwave trough moves through the area--the 12z
gfs is wetter than the ecmwf. Then, for the rest of the week the
showers look pretty few and far between except perhaps on Friday,
but pops are still pretty low for now and the extended forecast
hasn't been changed much.

Aviation An upper level ridge will remain over the region for sw
flow aloft. Weak low level onshore flow will become flat overnight.

Expect areas of lifr CIGS and vsbys at the coast to become a little
more wdsprd overnight.

Ksea...VFR. Winds will generally be light nly.

Marine
Weak onshore flow will become nearly flat or neutral overnight.

This will allow areas of dense fog on the coastal waters and west
entrance to the strait of juan de fuca to persist through at least
Sunday morning.

High pressure will strengthen some over the offshore waters during
the day Sunday. This combined with lowering pressure east of the
cascades will result in strengthening onshore flow on Sunday. It
now appears that gale force winds may be a possibility over parts of
the strait of juan de fuca Sunday night, especially with afternoon
temperatures remaining quite warm over the interior lowlands in
comparison to the cooler coast. Expect moderately strong onshore
flow to prevail Monday and Tuesday.

Sew watches warnings advisories
Wa... None.

Pz... Small craft advisory until 1 am pdt Sunday for central u.S.

Waters strait of juan de fuca.



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
WPTW1 - 9441102 - Westport, WA 2 mi64 min WNW 6 G 8.9 52°F 55°F1019.7 hPa
46211 - Grays Harbor, WA (036) 9 mi18 min 53°F5 ft
TOKW1 - 9440910 - Toke Point, WA 13 mi40 min SW 2.9 G 5.1 52°F 56°F1020.1 hPa (+0.7)
46099 27 mi170 min WNW 7.8 53°F 53°F1018.6 hPa
46243 - Clatsop Spit, OR - 162 46 mi40 min 57°F4 ft
46041 - CAPE ELIZABETH- 45NM Northwest of Aberdeen, WA 46 mi50 min NW 7.8 G 9.7 53°F 54°F4 ft1019.3 hPa (+0.5)
46100 47 mi170 min WNW 7.8 52°F 55°F1019.1 hPa
ASTO3 - 9439040 - Astoria, OR 49 mi40 min SW 6 G 11 51°F 60°F1019.7 hPa (+1.0)

Wind History for Westport, WA
(wind in knots)    EDIT      (on/off)   Help
1
AM
2
AM
3
AM
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
Last
24hr
NW10
G13
N13
N7
--
N2
--
N2
N3
NW6
W4
NW6
W6
W7
G10
W9
NW10
G13
NW9
NW10
NW9
NW8
G11
NW8
NW9
NW7
NW4
NW6
G9
1 day
ago
N4
N4
N5
NE4
E7
E7
E4
E8
E5
NW5
NW11
NW11
NW13
NW17
NW11
NW10
NW11
NW13
N13
NW10
G13
N7
NW7
NW6
NW5
2 days
ago
SW2
W3
SW1
W3
NW3
NW4
NW3
NW4
NW4
W6
NW9
NW12
NW12
NW13
N12
NW9
NW10
N7
N5
N5

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hoquiam, Bowerman Airport, WA9 mi47 minWSW 68.00 miOvercast53°F52°F96%1020 hPa

Wind History from HQM (wind in knots)
2
AM
3
AM
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
Last 24hrSW4CalmCalmSE3CalmCalmCalmSW4SW7SW8SW10SW12W12SW14SW13SW14SW12SW12SW10SW10SW9SW7SW8SW6
1 day agoNE4NE3NE5N3CalmNE3E3E4CalmSW7SW9SW9W10W10SW13SW14SW16SW12SW13SW8W3CalmW3Calm
2 days agoCalmCalmCalmNE4NE4NE3CalmNW3CalmS5SW6SW8SW12SW13W12SW11W10W8SW7W5W3CalmCalmCalm

Tide / Current Tables for Bay City, South Bay, Grays Harbor, Washington
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Bay City
Click for Map
Sun -- 03:02 AM PDT     11.11 feet High Tide
Sun -- 05:28 AM PDT     Sunrise
Sun -- 08:39 AM PDT     Moonrise
Sun -- 09:34 AM PDT     -2.86 feet Low Tide
Sun -- 04:32 PM PDT     8.93 feet High Tide
Sun -- 08:59 PM PDT     Sunset
Sun -- 09:38 PM PDT     2.56 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
79.110.511.110.48.35.42.1-0.8-2.6-2.7-1.50.73.35.87.78.88.87.764.22.82.63.5

Tide / Current Tables for Grays Harbor Entrance, Washington Current
   EDIT      (on/off)   Help   One Week of Data
Grays Harbor Entrance
Click for Map
Sun -- 12:21 AM PDT     2.44 knots Max Flood
Sun -- 03:24 AM PDT     -0.00 knots Slack
Sun -- 05:28 AM PDT     Sunrise
Sun -- 07:04 AM PDT     -4.44 knots Max Ebb
Sun -- 08:39 AM PDT     Moonrise
Sun -- 10:27 AM PDT     0.01 knots Slack
Sun -- 01:38 PM PDT     2.96 knots Max Flood
Sun -- 04:50 PM PDT     -0.01 knots Slack
Sun -- 07:46 PM PDT     -2.57 knots Max Ebb
Sun -- 09:00 PM PDT     Sunset
Sun -- 10:26 PM PDT     0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.42.31.70.6-1.1-2.9-4-4.4-4.1-2.7-0.80.92.22.92.92.51.4-0.3-1.6-2.4-2.5-1.9-0.60.7

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 Seattle, WA (4,6,7,8)
      (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.