Marine Weather and Tides
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.
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 7:41AM||Sunset 4:28PM||Friday December 13, 2019 6:03 AM PST (14:03 UTC)||Moonrise 6:03PM||Moonset 9:11AM||Illumination 97%|
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 131119 AFDPQR
Area Forecast Discussion National Weather Service Portland OR 318 AM PST Fri Dec 13 2019
SYNOPSIS. An active weather pattern will continue today as a strong jet stream remains directed at Oregon. Northwest flow aloft this weekend will maintain low chances for showers. High pressure returns early next week and then weakens by mid-week.
SHORT TERM. Friday through Sunday . Satellite loop shows a broad arching jet over Oregon that extends toward the Hawaiian Islands. The forecast area split by two weather environments. North of the jet a cool and unstable air mass supporting showers. To the south lay a west to east front southern Oregon. A low will move west to east along the front today bringing more stratiform precipitation. Snow for the Lane county Cascades will pick up again as the low slides inland this morning. Model QPF indicating probably enough for another 6 to 10 inches above 5000 ft with a few inches down to about 4000 ft. The north Oregon and south Washington Cascades will be in snow showers and accumulation are expected to be less. The snow level will continue to drop, reaching around 2500 ft by Sat morning. By then precipitation chances have diminished.
Thunderstorm chances continue today for the north Oregon/south Washington coastal waters and inland as far as the coast range and Willapa Hills. Forecast soundings for Astoria show thin CAPE through the afternoon up to the -20C level. SREF 12 hr calibrated thunderstorm probability indicates best chance for thunderstorm will be this morning. So far no lightning strikes detected over the last 6 hours or so. Other guidance like the HREF 4 hour calibrated thunderstorm probability is lower and more over WA than Oregon.
Cyclonic northwest flow aloft Saturday will maintain unsettled conditions over the area, but model QPF is is low. Coastal areas and mountains stand the best chance for showers. On Sunday and upper ridge builds offshore but enough cyclonic northwest flow aloft remains over the area for some mention of precip. /mh
LONG TERM. Sunday night through Thursday . Operational models and respective ensembles are in good agreement showing the upper ridge gradually drifting east early next week. The 500 mb cluster analysis based off the 00Z model runs valid 00Z Tue show good agreement with the ridge axis just off the coastline. Will likely need to consider air quality issues early next week, but this does not look like an extended ridging pattern. The ECMWF ensembles suggest the upper level ridge will shift east Wed as an upper level low approaches the north California coast. This results in a return to a split-flow pattern. However, it appears a more consolidated upper level flow returns late next week. Weishaar
AVIATION. A weak low pressure making landfall near the California/Oregon border around midday today will bring light rain and some IFR and MVFR flight restrictions to our southern taf sites today. Elsewhere, partial clearing and decreasing winds this morning will result in a mix of VFR, MVFR and IFR conditions as fog and low clouds try to develop between 12-18z Friday. Temperatures aloft will continue to remain cold so instability should limit how long fog and low clouds stick around after 18-20z Friday. Nonetheless, expect conditions to deteriorate once again beginning between 00-06z Friday.
KPDX AND APPROACHES . An unstable showery weather pattern will lead to primarily VFR conditions with occasional MVFR conditions through 00z Saturday. There is a chance IFR conditions will temporarily develop between 12-18z Saturday. Winds may be weak enough and there may be enough clearing that fog and low clouds try to develop and produce more a mix of MVFR and IFR conditions beginning between 00-06z Saturday and continuing through 18z Saturday. /Neuman
MARINE. A weak surface low pressure will make landfall along the Oregon/California border today. This will decrease pressure gradients across the area and result in decreasing winds. Another weak low pressure will then drop southeastward towards the Oregon/California border on Saturday. This track should keep winds below advisory thresholds.
A weak front will then push towards the region late Sunday into early Monday, but impacts look to be limited. High pressure will then build over the Inland Northwest and likely result in offshore flow developing during the first half of next week. A stronger front looks to push towards the waters on Thursday. A developing surface low pressure in its wake could bring a period of stronger winds and higher seas late next week.
A large westerly swell of 16 to 18 ft with a dominant period of 15 to 16 seconds will slowly ease this afternoon and evening. Expect seas to drop down below 10 ft Saturday afternoon or evening. Seas should then hover a few feet on either side of 10 ft for much of next week. However, higher seas could happen if the stronger scenarios with the developing low pressure pan out. /Neuman
PQR WATCHES/WARNINGS/ADVISORIES. OR . Winter Storm Warning until noon PST today for Cascades in Lane County.
WA . None. PZ . Small Craft Advisory until 4 PM PST Saturday for coastal waters from Cape Shoalwater WA to Florence OR out 10 NM.Columbia River Bar-coastal waters from Cape Shoalwater WA to Florence OR from 10 to 60 NM.
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||57 min||45°F||1021 hPa|
|ASTO3 - 9439040 - Astoria, OR||56 mi||45 min||NNE 2.9 G 5.1||45°F||46°F||1019.6 hPa|
|TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR||63 mi||51 min||49°F||1020.4 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||70 min||NNW 6||8.00 mi||Overcast||40°F||37°F||93%||1021.2 hPa|
|Southwest Washington Regional Airport, WA||18 mi||67 min||SSE 5||10.00 mi||Light Rain||45°F||43°F||93%||1021.7 hPa|
|Pearson Airfield, WA||19 mi||70 min||ESE 3||10.00 mi||Partly Cloudy||43°F||39°F||89%||1021 hPa|
|Portland, Portland International Airport, OR||21 mi||70 min||Var 3||10.00 mi||Mostly Cloudy||45°F||41°F||86%||1021.2 hPa|
|Portland-Hillsboro Airport, OR||24 mi||70 min||N 0||0.50 mi||Fog||36°F||36°F||100%||1021 hPa|
Link to 5 minute data for KSPB
Wind History from SPB (wind in knots)
|1 day ago||Calm||Calm||S||Calm||Calm||Calm||Calm||Calm||Calm||S||Calm||S||S||SW||SW||S||Calm||Calm||Calm||N||W||Calm||Calm||Calm|
|2 days ago||Calm||Calm||Calm||Calm||Calm||E||E||Calm||Calm||Calm||SE||Calm||S||S||S||SE||SE||S||Calm||Calm||Calm||SE||S||Calm|
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 (9,2,3,4)(on/off)  Help
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