Marine Weather and Tides
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
|Sunrise 5:24AM||Sunset 9:05PM||Friday July 3, 2020 8:35 PM PDT (03:35 UTC)||Moonrise 7:04PM||Moonset 2:59AM||Illumination 98%|
7 Day Forecast for Marine Location Near St. Helens, ORHourly EDIT Help
Area Discussion for - Portland, OR  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS66 KPQR 032110 AFDPQR
Area Forecast Discussion National Weather Service Portland OR 210 PM PDT Fri Jul 3 2020
SYNOPSIS. Dry weather with seasonable temperatures continues through the weekend as an upper level trough of low pressure over the Pacific Northwest weakens. The trough deepens slightly again early next week returning a small chance for showers to parts of the region.
SHORT TERM. Tonight through Monday . The overall pattern will remain fairly consistent over the holiday weekend with typical Pacific Northwest weather expected through Monday. Water vapor imagery shows the the upper level trough extended across western Canada oriented southwest offshore, which has brought a few light showers to the southwest Washington coast. Expect these showers to diminish as the upper trough moves onshore tonight. With weak onshore flow in the low levels and residual low level moisture, much of the forecast areas in the valley and along the coast will see morning clouds with afternoon sun Saturday and Sunday. The marine air mass will also likely keep temperatures only a few degrees below July normal maximums, with valley high temperatures reaching the mid to upper 70s, while coastal regions will likely reach the mid-60s.
Another weak upper trough will likely swing toward the Pacific Northwest coast Monday. This may bring a few more light showers to the coast, while the valley locations should remain dry with some marine layer clouds lingering through the morning hours and temperatures moderating near the mid-70s again. DDH
LONG TERM. Monday night through Friday . The overall general pattern will remain quite similar as a broad upper level trough is expected to remain over the Pacific Northwest through next week. Model details differ somewhat as to how deep the trough will get and which days have the better chance of rain showers. Currently the National Blend of Models suggests the best chance of showers will be Tuesday, especially north of Salem and along the mountains, with diminishing chances Wednesday and Thursday. The GFS model though wants to deepen the upper low midweek off the Pacific NW coast with increasing chances of precip Wed and Thur, while the European model and most ensembles are not quite in agreement, leaving the GFS as a bit of an outlier.
Low level onshore flow will likely continue into the end of the week. The marine air mass should continue to keep daytime highs trending slightly cooler than normal, before possibly warming to near normal by the end of the week if any hint of ridging comes to fruition. Otherwise expect the continuation of the pattern with areas of morning clouds spreading in over the interior, followed by decreasing clouds in the afternoon. DDH
AVIATION. Marine layer continuing to erode early this afternoon. At 21Z areas of MVFR cigs persisted just east of KSLE to K61S. Low-end VFR cigs were noted along the south Washington and north Oregon coast and the associated coastal valleys. Expect prevailing VFR across the area by 23Z, but BKN sky conditions likely to persist in SW Washington and the north Oregon coast and Coast Range through at least Sat morning. Elsewhere, the marine layer fills in overnight, with areas of MVFR. Model guidance suggests marine layer dissipation timing Sat afternoon will be similar to today.
KPDX AND APPROACHES . VFR cigs 035-045 at the terminal and vicinity early this afternoon. SCT sky cover develops between by 00Z Sat. BKN-OVC conditions return by 10Z Sat, with MVFR possible late tonight through Sat morning. Weishaar
MARINE. Overall benign marine conditions for the next several days. A weak low off Vancouver Island and surface high pressure off the south Oregon and north California coast will be the dominant features over the waters. Wind speeds 10 kt or lower will persist through at least the middle of next week.
Wave heights this afternoon were around 5 ft. All model guidance show wave heights in the 3 to 5 ft range for the next several days. Models continue to show a low-amplitude long-period south swell through early next week. Long period swell, such as the 16 to 18 second south swell expected this weekend, usually raises concern regarding sneaker waves. However, current guidance indicates rather low wave heights associated with the long-period swell mixed with a 2-3 ft shorter period west to northwest swell. This produces combined wave heights 4 to 5 ft. Weishaar
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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||18 mi||47 min||63°F||1019.9 hPa|
|ASTO3 - 9439040 - Astoria, OR||56 mi||47 min||61°F||64°F||1020.6 hPa|
|TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR||63 mi||47 min||56°F||1021.4 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.
|Scappoose Industrial Airpark, OR||8 mi||42 min||N 6||10.00 mi||Fair||66°F||50°F||56%||1019 hPa|
|Southwest Washington Regional Airport, WA||18 mi||39 min||WNW 5||10.00 mi||Fair||63°F||52°F||68%||1020.4 hPa|
|Pearson Airfield, WA||19 mi||42 min||NNW 4||10.00 mi||Fair||67°F||48°F||53%||1019.1 hPa|
|Portland, Portland International Airport, OR||21 mi||42 min||N 8||10.00 mi||Mostly Cloudy||67°F||50°F||55%||1019.1 hPa|
|Portland-Hillsboro Airport, OR||24 mi||42 min||NE 7||10.00 mi||A Few Clouds||66°F||52°F||61%||1019 hPa|
Link to 5 minute data for KSPB
Wind History from SPB (wind in knots)
|1 day ago||W||NW||Calm||NW||W||Calm||Calm||Calm||SW||Calm||Calm||Calm||Calm||SE||SE||SE||Calm||E||E||Calm||NE||N||N|
|2 days ago||NW||NW||W||Calm||SW||SW||W||SE||Calm||SW||SW||NW||Calm||W||SW||NW|
EDIT Weekend mode (on/off) (on/off)  Help One Week of Data
EDIT (on/off)  Help One Week of Data
Weather Map(on/off)  Help Weather Map
GEOS 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 (23,6,7,8)(on/off)  Help
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