Marine Weather and Tides
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
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|Sunrise 6:17AM||Sunset 8:10PM||Wednesday August 21, 2019 12:25 AM PDT (07:25 UTC)||Moonrise 10:11PM||Moonset 11:17AM||Illumination 69%|
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 210422|
area forecast discussion
national service portland or
922 pm pdt Tue aug 20 2019
Synopsis A fall like storm system will bring widespread, and
locally heavy, Wednesday. Westerly flow and mild conditions return
heading into the weekend. A weak system brushes by on Saturday with
light rains possible across the north. Offshore high pressure begins
building early next week bringing a gradual warming trend.
Short term Tonight through Friday... Mature low pressure center
located near 45n 145w is at the heart of a slowly deepening offshore
trough. The trough has tapped into a notably moist tropically
sourced moisture plume with pw values as high as 2.50". That
moisture is getting entrained into the frontal structure with the
cold front pegged to cross the forecast area during daylight hours
Wednesday. Fortunately, the highest pw will not make it to the
frontal zone by tomorrow morning, however, there will still be 1.80"-
2.00" moisture plumes phasing into the front by late tonight and
The 12z hi-resolution convective allowing models (cams) have a rough
consensus that the precip evolution will largely be focused on a 2-3
hour window where precip rates will be enhanced by some embedded
convection. However, the global and mesoscale models are not hinting
at much instability associated with the front. Suspect there is just
enough conditional instability to warrant the pinpoint pockets of
45+ dbz modeled composite reflectivity. Model soundings do indicate
a few hour period near the frontal passage where the odd thunder
clap may occur. Did add in a slight chance mention in a narrow
ribbon across the area from west to east as the front passes by
during the late morning through early evening.
The pinpointed QPF maxes mean a wider range of potential QPF values
brings considerable uncertainty to which locations will see the
higher end of the potential rain closer to three-quarters of an inch
and to those which will see the lower end around several hundredths
to a quarter-inch. If nothing else, the cams agree that everywhere
in the CWA will likely see measurable rain. Unfortunately, the
central cascades and lane county foothills are a little less
certain, but still have an above average shot at picking up at least
some measurable rain, albeit more likely limited in nature.
Showers will taper off from late Wednesday evening with the last
vestiges hanging on longest over the cascades Thursday morning.
Westerly flow then takes over heading in to the weekend with
temperatures starting to warm about 5-8 degrees after tomorrow
roughly 15 degree drop. Jbonk
Long term Friday night through Tuesday... A shortwave will slide
north of the region and appears to have enough moisture in the flow
to bring some light rains across the far north. Amounts may struggle
to reach a tenth, if anything. Did increase pops some but have
leaned on an overall model blend for their output.
Longwave ridging tries to build over the west coast Sunday but will
have an easier time Monday and Tuesday as the upper trough drifts
away to the east. Temperatures will gradually warm toward the mid
and upper 80s as an initial projection but there is still some
uncertainly as the driving thermal trough may remain closer to the
cascades which would lend toward the slight cooling effects from
onshore flow during the afternoons. Jbonk
Aviation Vfr conditions continue this evening under mostly
clear skies inland as scattered high clouds continue to pass across
the area. Meanwhile low and mid clouds will continue to increase
along the coastal areas late this evening as the front approaches.
MVFR marine stratus will return late this evening followed by
lowering CIGS with the front later tonight as the front pushes
onshore by daybreak Wednesday. Expect rain and MVFR CIGS to spread
onshore late morning through early Wednesday afternoon with
mountains remaining obscured in rain clouds through the day.
Kpdx and approaches... PredominatelyVFR tonight, but mid clouds
increase early Wednesday by 15z ahead of the approaching front.
LowVFR CIGS expected to lower by 18z Wednesday with steady rain and
MVFR conditions expected into the afternoon. Cullen
Marine Seas remain in the 4 to 6 ft range, mainly from a nw
swell. That will change today as an unseasonable front
approaches the waters through tonight, then moves through the
waters Wednesday. Small craft winds are being seen at bouy 46089.
Expect these winds to progress further into the outer waters
through the evening, then progress to the inner waters by
Wednesday afternoon. The strongest winds are still expected from
tonight through Wednesday with gusts of 30 kt in our outer
waters with the potential for some isolated gusts higher than 30
Seas will generally start to build towards 6 to 8 feet with the
potential for some steep square seas too. Wind wave and swell
associated with this system could push seas towards 10 feet
Wednesday and possibly Thursday. The area that would have the
best chance of having 10 foot seas is our northern waters due to
larger swells and potentially stronger wind. 42
Pqr watches warnings advisories
Pz... Small craft advisory until 11 am pdt Wednesday for waters from
cape shoalwater wa to florence or from 10 to 60 nm.
Small craft advisory until 5 pm pdt Wednesday for coastal
waters from CAPE shoalwater wa to florence 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||55 min||71°F||1016.5 hPa|
|TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR||66 mi||55 min||61°F||1016.9 hPa|
|ASTO3 - 9439040 - Astoria, OR||74 mi||55 min||SSE 2.9 G 4.1||62°F||69°F||1015.8 hPa|
Wind History for Longview, WA(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.
|Pearson Airfield, WA||6 mi||32 min||N 0||10.00 mi||Fair||65°F||55°F||73%||1016.6 hPa|
|Portland, Portland International Airport, OR||7 mi||32 min||N 0||10.00 mi||A Few Clouds||66°F||55°F||68%||1016.6 hPa|
|Portland-Hillsboro Airport, OR||14 mi||32 min||N 0||10.00 mi||Fair||59°F||52°F||78%||1016.4 hPa|
|Portland, Portland-Troutdale Airport, OR||15 mi||32 min||S 5||10.00 mi||Fair||66°F||53°F||63%||1016.7 hPa|
|Scappoose Industrial Airpark, OR||19 mi||32 min||N 0||10.00 mi||Fair||58°F||55°F||90%||1016.2 hPa|
|Aurora State Airport, OR||20 mi||32 min||N 0||10.00 mi||Fair||62°F||52°F||70%||1017.1 hPa|
Link to 5 minute data for KPDX
Wind History from PDX (wind in knots)
|1 day ago||N||NW||NW||NW||NW||Calm||NW||Calm||Calm||NE||NW||W||W||NW|
|2 days ago||N||N||N||NW||N||NW||SW||Calm||Calm||N||NW||N||NW||NW||NW||N||NW|
EDIT Weekend mode (on/off) (on/off)  Help One Week of Data
EDIT (on/off)  Help One Week of Data
Weather Map and Satellite Images(on/off)  HelpWeather Map
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 (3,6,7,8)(on/off)  Help
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