Saturday, August24, 2019 L-36.com


Marine Weather and Tides
South Bend, WA

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:22AMSunset 8:12PM Saturday August 24, 2019 5:22 PM PDT (00:22 UTC) Moonrise 11:54PMMoonset 2:41PM Illumination 30% Phase: Waning Crescent; Moon at 24 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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PZZ110 Grays harbor bar- 246 pm pdt Sat aug 24 2019 combined seas 4 to 6 ft. Bar conditions light. Maximum ebb currents will occur around 1215 am tonight and 100pm Sunday afternoon.
PZZ100 246 Pm Pdt Sat Aug 24 2019
Synopsis for the northern and central washington coastal and inland waters..Onshore flow will continue through Monday before turning offshore on Tuesday as a thermal trough builds north along the west coast.


7 Day Forecast for Marine Location Near South Bend, WA
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location: 46.69, -123.82     debug


Area Discussion for - Portland, OR
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Fxus66 kpqr 242110
afdpqr
area forecast discussion
national service portland or
210 pm pdt Sat aug 24 2019

Synopsis Another weak upper level disturbance will slide by
to the north of the area late tonight and early Sunday, bringing
seasonable temperatures to the region. High pressure aloft begins to
rebuild and strengthen late Sunday and through early next week over
the pacific northwest, with above normal temperatures across the
region expected.

Short term Saturday through Monday... A westerly flow aloft
Saturday afternoon is expected to continue into Sunday. A weak
shortwave, following on the heels of todays, is expected to cross
washington early Sunday. A weak front with todays system has left a
band of clouds in the low to mid level moisture across the NW part f
the forecast area Saturday afternoon. Klgx radar and surface
observations showed isolated weak showers over southwest washington
and the far north part of the oregon coast range. Will keep a low
pop this evening for the south washington cascades as the remains of
the front continue to push inland. With a continuation of low level
onshore enhanced by a weak shortwave in the north, expect to see
shallow marine clouds redevelop overnight along the southern part of
the coast, and push locally inland up the lower columbia late
tonight and early Sunday. With the modest reinforcement of marine
air overnight, expect temperatures Sunday similar to Saturdays
highs.

Sunday night through Tuesday models agree on the upper flow turning
northwest as an upper ridge builds offshore and eventually shifts
inland as a negative tilt ridge. A thermal induced surface trough is
expected to build up the coast Sunday night and Monday in response
to the upper level ridging, turning the low level flow more
northerly with time. This will reduce considerably any prospects for
a return of marine clouds Sunday night and Monday night. Warming
temperatures in this pattern will see temperatures climbing Monday
and Tuesday, with 850 mb temperatures reaching 22c by 00z,
suggesting highs well into the 90s by Tuesday afternoon despite a
bit of a mid level subsidence inversion suggested in the model
soundings limiting temperatures to something a little less than what
might otherwise be expected for the 850 mb temperatures with an
offshore flow.

Long term Tuesday night through Saturday... A negatively tilted
high pressure ridge continues to build over the west coast through
Wednesday. As the ridge builds on Wednesday, skies are expected to
be clear which will raise temperatures into the 90s. On Thursday,
conditions begin to shift as a shortwave trough moves through the
flow around the ridge. As this shortwave advances towards the west
coast, models begin to diverge which impacts confidence on Thursday
and Friday. The ECMWF brings the shortwave inland farther and faster
on Thursday, while the GFS keeps a majority of the energy off shore
of the northern oregon coast. However, with either solution this
pattern is generally favorable for convective activity, so a slight
chance of thunderstorms and showers are forecast on Thursday
afternoon along the cascade crest. On Friday night into Saturday, a
front along the leading edge of an alaskan low will approach the
west coast which may bring a chance of showers to the coast.

Aviation Expect MVFR conditions along the coast, once
developed today, will persist overnight. Inland areas are mostly
expected to remainVFR through the next 24 hours, except for a
good chance that MVFR CIGS develop and spread up the lower
columbia past kpdx and kttd after 10z. Except the north coast,
expectVFR conditions to return by about 17z Sunday. The north
coast may remain MVFR through the day Sunday.

Kpdx and approaches...VFR conditions are likely to prevail through
this evening. There is a good chance for seeing MVFR ceilings with
marine clouds spreading into the area after 11z Sunday morning.

Bowen

Marine A decaying cold front has weakened the high pressure
system over the NE pacific, so winds will be lighter across the
coastal waters today with speeds 15 kt or less. As this front
dissipates, high pressure will reassert itself over the ne
pacific, causing n-nw winds to increase across our coastal waters
Sunday. Winds above 20 kt are likely to continue uninterrupted
through the first part of next week as both the high pressure
system over the NE pacific and a thermal trough over SW oregon
intensify. Increasing wind wave component will result in
increasingly choppy seas Sunday and Monday.

The thermal trough over southern oregon is modeled to build
northward into the north oregon waters toward the middle of next
week. This may push the stronger winds further offshore Wednesday,
while lighter offshore flow prevails for the coastal waters.

Bowen

Pqr watches warnings advisories
Or... None.

Wa... None.

Pz... Small craft advisory from noon to 11 pm pdt Sunday for coastal
waters from cascade head or to florence or out 60 nm.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TOKW1 - 9440910 - Toke Point, WA 8 mi59 min WNW 11 G 15 65°F 67°F1017.7 hPa
WPTW1 - 9441102 - Westport, WA 21 mi47 min WNW 14 G 15 62°F 63°F1017.5 hPa
46211 - Grays Harbor, WA (036) 25 mi53 min 62°F5 ft
ASTO3 - 9439040 - Astoria, OR 33 mi53 min WSW 1.9 G 5.1 69°F 70°F1017.3 hPa
46243 - Clatsop Spit, OR - 162 37 mi53 min 68°F5 ft
46099 45 mi153 min WNW 3.9 62°F 1017.5 hPa

Wind History for Toke Point, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hoquiam, Bowerman Airport, WA22 mi90 minW 138.00 miFair69°F57°F68%1017.4 hPa

Link to 5 minute data for KHQM

Wind History from HQM (wind in knots)
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Last 24hrNW7NW5--------NW4NW4CalmW4W4SW7SW5S5S7SW7SW6SW6SW6W10W13W12W13W14
1 day agoW9------NW5--NW3--CalmCalmCalmCalm--CalmE3CalmE5SE5S3SW3W7W11W11NW7
2 days agoNW12
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NW9--NW7W9--W6NW4--W5NW4CalmCalmCalmNW3NW3W5W8W7SW7W8W9W10--

Tide / Current Tables for Mailboat Slough, Willapa River, Washington
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Mailboat Slough
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Sat -- 12:14 AM PDT     Moonrise
Sat -- 02:22 AM PDT     1.01 feet Low Tide
Sat -- 06:24 AM PDT     Sunrise
Sat -- 08:46 AM PDT     6.06 feet High Tide
Sat -- 02:04 PM PDT     3.18 feet Low Tide
Sat -- 03:41 PM PDT     Moonset
Sat -- 08:09 PM PDT     Sunset
Sat -- 08:18 PM PDT     8.18 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.81.81.11.22.23.44.45.25.965.64.73.93.43.23.54.667.17.88.287.25.9

Tide / Current Tables for Grays Harbor Entrance, Washington Current
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Grays Harbor Entrance
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Sat -- 12:14 AM PDT     Moonrise
Sat -- 02:42 AM PDT     0.00 knots Slack
Sat -- 05:04 AM PDT     1.13 knots Max Flood
Sat -- 06:25 AM PDT     Sunrise
Sat -- 08:40 AM PDT     -0.00 knots Slack
Sat -- 11:22 AM PDT     -1.39 knots Max Ebb
Sat -- 02:17 PM PDT     0.00 knots Slack
Sat -- 03:43 PM PDT     Moonset
Sat -- 04:51 PM PDT     1.43 knots Max Flood
Sat -- 08:11 PM PDT     Sunset
Sat -- 08:19 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-2.4-1.8-0.80.30.91.110.80.5-0.3-1-1.4-1.3-1-0.30.71.31.41.20.80.2-0.6-1.7-2.5

Weather Map and Satellite Images
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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.
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Wind Forecast for Portland, OR (20,4,5,8)
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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.