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 7:07AM||Sunset 4:43PM||Tuesday November 13, 2018 8:38 PM PST (04:38 UTC)||Moonrise 12:25PM||Moonset 9:52PM||Illumination 36%|
7 Day Forecast for Marine Location Near Portland, ORHourly EDIT Help
Area Discussion for - Portland, OR  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus66 kpqr 140354|
area forecast discussion
national weather service portland or
755 pm pst Tue nov 13 2018
Synopsis Offshore flow through the gorge will continue to weaken
tonight and Wednesday. A weak frontal system passes over the area
tonight and Wednesday, but precipitation will favor the north half.
Another weak impulse drops southeast from british columbia late
Thursday night and Friday morning. Strong high pressure returns over
the weekend and is expected to hold into early next week. This will
also result in another round of east wind through the columbia gorge.
Short term Tonight through Friday... No changes. Previous
discussion follows. East wind continues through the gorge this
afternoon, but not quite as strong as early this morning. At 21z the
kttd-kdls gradient was around -6.0 mb. This was enough to produce 55
mph gusts at crown point and 40-45 mph at corbett. 18z NAM suggests
the kttd-kdls gradient will drop to around
-3.5 mb by 12z wed, which is several hours slower than the 12z
version. This trend is more plausible considering the stratus field
piled up in the central gorge and upper hood river valley, which is
indicative of cross-cascade flow. Kttd profiler indicates a rapid
weakening of the primary east wind core late this afternoon.
Another added forecast twist is the potential for california wildfire
smoke to be over the area. The 12z hrrr 6000 ft agl smoke product
indicates some degree of drift smoke to be over the region tonight.
The strengthening SW 850 mb flow will push it east late tonight and
wed, but higher concentrations are possible over the south part of
the area, such as lane county. Less cloud cover tonight and minimal
to no wind could lead to short-term periods of moderate to unhealthy
for sensitive groups air quality categories.
Although not in the forecast or grids, would not be surprised to see
isolated flurries fall out of the stratus field in the central gorge
and upper hood river valley. Water vapor satellite imagery shows a
weakening low level front just inside 130w at 21z that will likely
stall just off the washington coast late this evening. The 12z nam
was a little slower with it, which makes sense as it enounters strong
surface high pressure. However, the 850 mb sw-w flow strengthens to
20-30 kt tonight and wed. This should be enough to help scour the
cold air in the central gorge and upper hood river valley. Rain still
appears very unlikely across our southern zones, including places
like corvallis and eugene. With the bulk of the upper level support
moving eastward across southern canada wed, the front should stall
out across our northern zones and fall apart Wednesday night into
early Thursday with rain chances decreasing fairly quickly during
H5 high pressure will be centered along 130-135w Thu night. This is
far enough offshore to allow short-waves within northwest flow aloft
to be in close proximity to the area. One such feature slides across
ne washington 12z fri. Models suggest there may be enough cyclonic
curvature to the flow for a threat of precip in SW washington and the
north oregon cascades from mt. Hood northward. Southern interior
valleys will likely see areas of fog Thu night through Fri morning.
The upper ridge amplifies Friday afternoon, which will result in
light north low-level flow. Friday could be the start of air quality
issues due to weak transport wind and minimal surface flow.
Fortunately, the 850-700 mb mean layer flow Fri will be nw-n. This|
would not be favorable for transport of california smoke into the
forecast area. Weishaar
Long term Friday night through Tuesday... No changes. Previous
discussion follows. Deterministic models are in agreement that a
sharp upper level ridge will remain over the forecast area from
Friday night into Saturday resulting in dry conditions. Both the gfs
and ECMWF show precipitation arriving along the coast by Monday
night as a weak front pushes on shore. This precipitation pattern
looks to stay in the extended forecast through Tuesday and into
Wednesday. Weak winds in the willamette valley allow for the
persistence of early morning fog and temperatures trend slightly
downward and stay within seasonal norms. -bphillips &&
Aviation Vfr conditions to begin with this evening, but a slow
moving cold front moving SE across NW oregon over the next 24 hours
will bring lowering CIGS and chances for light rain. CIGS along the
north coast will be the first to lower, expected to drop into MVFR
category by 09z. Further to the south and east CIGS will be slower
to come down, as late as 18z to 00z in the south willamette valley.
The likelihood of CIGS dropping into MVFR category also decreases to
the south and east, although all locations in NW oregon stand at
least a chance of doing so.
Pdx and approaches...VFR conds to continue through at least 12z wed
morning, and perhaps longer. After 12z there is an increasing chance
to see MVFR CIGS settle in. Expect low endVFR to MVFR CIGS to then
continue past 00z Wed afternoon.
Marine No changes. Previous discussion follows. An approaching
cold front has slowed from earlier forecasts. SCA level winds of 21+
kts are sitting just outside the northwest corner of our waters per
an earlier satellite derived wind pass. Still expect gusts around 25
kt for tonight across the northern waters, but have delayed the
onset of the inner waters until about mid-evening. Have also delayed
the frontal passage by a few hours. Now expect the front will move
onshore around mid-day Wednesday 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 then build into the 7 to 9 ft range tonight
with the front. A trailing dynamic swell train will then briefly bring
westerly seas near 10 ft late Wednesday night and early Thursday.
Seas than drop to between 5 and 8 feet for several days
Pqr watches warnings advisories
Pz... Small craft advisory for winds until 10 am pst Wednesday for
waters from CAPE shoalwater wa to cascade head or from 10
to 60 nm.
Small craft advisory for winds until noon 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||42 mi||39 min||52°F||1028.2 hPa (-0.0)|
|TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR||66 mi||39 min||51°F||1027 hPa (-0.4)|
|ASTO3 - 9439040 - Astoria, OR||74 mi||39 min||ESE 4.1 G 7||47°F||52°F||1026.1 hPa (-0.4)|
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||6 mi||46 min||N 0||10.00 mi||Fair||40°F||32°F||73%||1028.8 hPa|
|Portland, Portland International Airport, OR||7 mi||46 min||ESE 6||10.00 mi||Mostly Cloudy||40°F||32°F||73%||1029 hPa|
|Portland-Hillsboro Airport, OR||14 mi||46 min||N 0||7.00 mi||Fair||33°F||30°F||89%||1028.7 hPa|
|Portland, Portland-Troutdale Airport, OR||15 mi||46 min||E 16 G 25||10.00 mi||Fair||41°F||30°F||67%||1028.8 hPa|
|Scappoose Industrial Airpark, OR||19 mi||46 min||W 3||10.00 mi||Fair||34°F||32°F||92%||1028.7 hPa|
|Aurora State Airport, OR||20 mi||46 min||N 0||7.00 mi||Smoke||37°F||34°F||89%||1029 hPa|
Wind History from PDX (wind in knots)
|1 day ago||E||E|
|2 days ago||W||NW||W||W||W||W||NW||W||W||NW||NW||NW||NW||NW||W||NW||E||E|
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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.
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Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Portland, OR (23,6,7,8)(on/off)  Help
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