Marine Weather and Tides
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 7:05AM||Sunset 4:44PM||Monday November 12, 2018 10:28 PM PST (06:28 UTC)||Moonrise 11:44AM||Moonset 8:55PM||Illumination 26%|
7 Day Forecast for Marine Location Near Minnehaha, WAHourly EDIT Help
Area Discussion for - Portland, OR  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus66 kpqr 130444|
area forecast discussion
national weather service portland or
843 pm pst Mon nov 12 2018
Synopsis High pressure centered over the pacific northwest today
will shift east tonight and Tuesday. A weak frontal system moves
across western washington and northwest oregon Tuesday late Tuesday
afternoon and Tuesday night. Onshore low-level flow continues
Wednesday. Dry conditions look to return Thursday and persist into
the weekend. There is the potential for another round of east wind
Friday night through Sunday.
Short term Tonight through Thursday... No changes. Previous
discussion follows. Main short-term weather issue continues to be
the east wind. At 21z the kttd-kdls gradient had lowered to -9.8 mb.
This was almost 2 mb stronger than the 12z NAM forecast. Typically,
the nam, among others, tends to be about 2 mb too low on the
gradient during these east wind episodes. The kttd profiler
indicates the east wind core (about 2000 feet above the surface) is
slowly easing early this afternoon. Also, the profiler data suggests
the core layer will continue to become more shallow the remainder of
the day and through tonight. Crown point had a peak gust of 86 mph
earlier, but shortly before 21z indicated gusts to 69 mph.
The 12z NAM maintains a -6 mb kttd-kdls gradient at 14z tue, which is
still good enough for peak gusts around 50-60 mph for crown point and
35-40 mph at the west end of the gorge.
The synoptic pattern today is characterized by a sharp 500 mb ridge
axis centered along the coast at 21z. Satellite imagery indicates an
impressive-looking frontal boundary stretching from a parent low in
the gulf of alaska to a cold front along 135w. The bulk of the energy
will be directed through western canada as the jet stream is forecast
to remain along 50 degrees latitude. The offshore gradient continues
to weaken overnight through tue. Models tend to weaken the offshore
gradient too soon and would not be surprised to see some east wind
lingering through the western gorge into Tuesday evening. The
aforementioned front weakens as it approaches the coast with the
leading edge reaching the south washington coast Tue afternoon.
Overall, this system is not very impressive, considering it will
encounter a fairly strong ridge. The bulk of the precip will be over
sw washington, the north oregon coast and coast range Tue night
through Wed morning. Areas south of a newport to albany line may not
get any precip. Surface high pressure strengthens Wed night and have
included patchy fog for the coast and most interior valley areas.
Northwest flow aloft Thursday coupled with on-shore low-level flow
should result in considerable clouds across much of the area, but any
shower threat will be to the north. Weishaar
Long term Thursday night through Monday... No changes. Previous
discussion follows. Deterministic models remain in good agreement
through much of the long term period and continue to show a sharp
upper level ridge building across the pac nw. This will likely keep
conditions dry through the weekend under weak offshore flow. Given
that we are generally within our fog season, suspect conditions are
ripe for overnight fog development in wind protected valleys in the|
interior through the weekend. The forecast becomes more uncertain
early next week as models start to diverge significantly, but the
general trend is to swing a weak front across the forecast area on
Monday or Tuesday so will keep some slight chance pops across the
region during this time. Given the current pattern expect rather
seasonable temps through early next week, with little day to day
Aviation GenerallyVFR conditions expected next 24 hours. The
only exception is north coastal areas where an approaching cold
front late Tue will bring lowering CIGS and increasing chances for
rain. MVFR conditions at kast become likely after 00z. Shallow
ground fog is possible at the south end of the willamette
valley keug between 11z and 16z, but it remains unlikely to cause
any significant restriction to vis or cigs.
Easterly winds out of the gorge, will continue to impact kttd and
kpdx, but the winds are expected to weaken slowly tonight and tue.
Gusts in the range of 30 to 35 kt remain possible at kttd through
Pdx and approaches...VFR flight conditions tonight and tue. Eastely
winds out of the gorge will continue to slowly weaken next 24 hours.
Marine No changes. Previous discussion follows. Winds over the
waters have gradually eased today as expected and decided to let the
previous SCA for winds expire as planned. The next approaching
frontal system will turn winds southerly tonight into tue. Expect
southerly pre-frontal winds will increase Tue and Tue night, with
gusts to 25 kt expected mainly over the northern waters. Have issued
another SCA for winds covering the northern waters for this next
event. The front will move onshore early Wed with winds becoming
light westerly behind the front. High pres will build over the
waters for Thu and fri, bringing a period of northerly winds. Then
more offshore flow is looking increasingly likely next weekend but
not especially strong at this point.
Seas will remain 5 ft or below through today and most of tue. The
frontal system late Tue into Wed should push seas back up into
the 7 to 9 ft range. Then a trailing dynamic swell train from
the system should push seas back up around 10 ft later Wed into
thu. Jbonk pyle
Pqr watches warnings advisories
Pz... Small craft advisory for winds from 9 am Tuesday to 7 am pst
Wednesday for waters from CAPE shoalwater wa to cascade
head or from 10 to 60 nm.
Small craft advisory for winds from 4 pm Tuesday to 7 am pst
Wednesday for coastal waters from CAPE shoalwater wa to
cascade head or out 10 nm.
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Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|LOPW1 - 9440422 - Longview, WA||37 mi||46 min||53°F||1029.1 hPa|
|TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR||66 mi||46 min||51°F||1027 hPa|
|ASTO3 - 9439040 - Astoria, OR||71 mi||40 min||N 8 G 14||51°F||52°F||1026.8 hPa|
Wind History for Longview, WA(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Pearson Airfield, WA||1 mi||35 min||SE 6||10.00 mi||Fair||43°F||30°F||60%||1029.8 hPa|
|Portland, Portland International Airport, OR||4 mi||35 min||SE 12 G 20||10.00 mi||Mostly Cloudy||43°F||28°F||58%||1029.5 hPa|
|Scappoose Industrial Airpark, OR||14 mi||35 min||SSW 5||10.00 mi||Fair||37°F||30°F||79%||1029.9 hPa|
|Portland, Portland-Troutdale Airport, OR||15 mi||35 min||E 25 G 36||10.00 mi||Fair and Windy||41°F||28°F||62%||1029.7 hPa|
|Portland-Hillsboro Airport, OR||16 mi||35 min||N 0||10.00 mi||Fair||35°F||30°F||85%||1030 hPa|
Wind History from VUO (wind in knots)
|1 day ago||Calm||NW||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||NW||W||NW||W||E||E|
|2 days ago||N||NW||NW||N||N||NW||NW||N||NW||N||Calm||NW||NW||N||NW||NW||NW||W||Calm||Calm||Calm|
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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 (1,6,7,8)(on/off)  Help
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