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Marine Weather and Tides
Version 3.4 |
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues. 6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported. 5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive. |
| Sunrise 5:49AM | Sunset 7:54PM | Tuesday April 24, 2018 8:20 AM EDT (12:20 UTC) | Moonrise 1:51PM | Moonset 3:28AM | Illumination 67% |  |
Marine Forecasts
EDIT (on/off) Help7 Day Forecast for Marine Location Near Hood River, OR
Hourly EDIT Helplocation: 45.71, -121.53 debug
Area Discussion for - Portland, OR
(on/off) Help NOTE: mouseover dotted underlined text for definition| Fxus66 kpqr 240946 aaa afdpqr area forecast discussion national weather service portland or 237 am pdt Tue apr 24 2018 Synopsis Strong high pressure aloft will remain over the pacific northwest through Thursday. Offshore low-level flow will persist west of the cascades today. The surface thermal trough drifts inland Wednesday, in conjunction with a southerly flow reversal along much of the coast. A southwest marine surge develops Wednesday night and Thursday. An upper level low approaching the north california coast late in the week will spread a chance for showers and maybe even a few thunderstorms to the region Thursday evening. The upper low eventually slides southeast into the great basin over the weekend. Short term Today through Thursday... An early taste of summer will continue for the next couple of days. Water vapor imagery early this morning showed 500 mb high pressure centered over SW oregon to ne washington. A 500 mb low was noted near 40n 139w. The 03 hr NAM mslp forecast valid 09z depicted a surface thermal trough extending from near koth north to the washington coast. This has resulted in offshore low-level flow across the forecast area. At 09z the kttd-kdls gradient was about -6 mb. Gusts to 50 mph were noted at crown point. Three corner rock raws, in the south washington cascades registered gusts to 55 mph. Many areas had humidity values of 25 percent or less and offshore wind gusts 20 mph or more at 09z. The 06z NAM indicates the kttd-kdls offshore gradient peaks near -7 mb between 15z and 18z today. Model 850 mb temps valid 00z Wed are expected to be around 12c in the north to 16c in the south. Thus, max temps today will be around 4-8 degrees warmer than mon, with several high temp records sure to fall. Would not be surprised if kast and ktmk hit 80 degrees today, which would be a record for kast. The NAM shifts the thermal trough into the willamette valley and sw washington interior lowlands by 06z wed. In addition, south flow reversal along the south oregon coast is forecast to reach at least konp or even a bit more north by 12z wed. Typically, models tend to be too agressive moving the thermal trough inland. In any event, subsidence inversions should be quite prevalent Tue night in the s washington and north oregon cascades and foothills. Model forecast 850 mb temps valid 00z Thu rise to around 15c at kpdx to 19c in the lane county cascades. By 18z Wed the low-level offshore flow is nearly gone, mainly confined to the west end of the gorge and sw washington cascade foothills. The thermal trough axis is forecast to be centered from the S washington cascade foothills to the lane county cascade foothills. This will maintain low to mid 80s Wed for much of the interior lowlands. The coast will be much cooler wed, except for the S washington and extreme N oregon coast where light offshore flow is expected to continue. The NAM shows some interesting developments Wed night. First, a southwest marine surge strengthens, mainly impacting the coastline and central oregon coast range and coastal valleys. Should this occur, some of this marine air would likely spill through the central coast range gaps and leak into the west side of the south willamette valley. Second, surface low pressure settles over the north willamette valley and induces stronger offshore flow through the gorge. Onshore flow gradually deepens through the day thu, but the sw washington interior lowlands and north willamette valley will remain under the thermal trough. Thus, expect minimal cooling in these areas thu. The central coast range and south willamette valleys will be |
several degrees cooler due to the deeper marine layer. The gfs, ecmwf and NAM show se-s 500 and 700 mb flow Thu afternoon. Will need to watch for potential convection over northern california and the south oregon cascades drifting north into the forecast area. The GFS has a hint of this in the central oregon coast range 00z fri. The more favorable instability looks to occur in the 00z-06z Fri time frame. Weishaar Long term Thursday night through Monday... Models are in general agreement showing the upper low drifting closer to the north california and south oregon coast Thu night. However, the qpf details differ. The GFS shows an axis of 500-800 j kg CAPE over the lane county cascades 00z Fri spreading north to northwest into the willamette valley. However, by 06z there is little to no cape. The nam shows an area of QPF developing along the the boundary of the thermal trough and incoming marine layer at 03z Fri and expanding it north overnight. There may be the potential for elevated convection, especially in the cascades. By Fri morning a much deeper marine layer is expected as the upper low continues to drift inland. The ecwmf is much slower moving the low inland compared to the gfs. However, Fri looks to be much cooler with scattered showers. The unsettled pattern continues through the weekend, but Saturday looks to have the highest pops. Weishaar Aviation 12z tafs:VFR conditions expected for the next 24 hours. Offshore flow will ease Tuesday afternoon. Kpdx and approaches...VFR conditions through early Wednesday. Fairly strong easterly wind gusts of 20-30 kt will continue through 18z-20z Tuesday, then ease off. Marine A surface thermal trough over the waters with east to northeast winds. Some isolated gusts 25 kts expected downwind of the coastal river gaps including the mouth of the columbia river through this morning. Winds will ease during the afternoon and evening as the thermal trough weakens. A southerly wind reversal may push into the central waters tonight. A more substantial southerly surge will likely occur Wednesday afternoon into Thursday morning more widespread fog and low clouds. Small craft advisory level winds could return towards the weekend, as a front moves into the north oregon and south washington waters. A longer period westerly swell moved into the waters overnight. All buoys in the coastal waters now showing a period of 17 seconds with significant wave height of 6 to 8 ft. Wave heights are expected to peak below 10 ft today. The swell period and height will then gradually lower over the next few days. Mh tw Pqr watches warnings advisories Or... None. Wa... None. Pz... None. Interact with us via social media: |
Weather Reporting Stations
EDIT (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 | 80 mi | 51 min | 51°F | 1021.7 hPa |
Wind History for Longview, WA
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Airport Reports
EDIT (on/off) Help Click EDIT to display multiple airports| Airport | Dist | Age | Wind kt | Visibility | Sky/Weather | Temp | DewPt | Humidity | Pressure |
Wind History from CZK (wind in knots)
| 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | 12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | |
| Last 24hr | SW G20 | SW | W | SW | SW G15 | SW G18 | ||||||||||||||||||
| 1 day ago | SW | SE | E | S | ||||||||||||||||||||
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Tide / Current Tables for Ellsworth, Washington - IGNORE HEIGHTS
EDIT RT Ports Option Weekend mode (on/off) (on/off) Help One Week of Data| Ellsworth Click for MapNote: The Columbia River is subject to annual freshets. Short range predictions are available at local river forecast centers. The data for stations above Harrington Point apply only during low river stages. There is a tidal influence along most of the Tue -- 03:48 AM PDT Moonset Tue -- 03:54 AM PDT 7.23 feet High Tide Tue -- 06:08 AM PDT Sunrise Tue -- 11:26 AM PDT 2.90 feet Low Tide Tue -- 02:17 PM PDT Moonrise Tue -- 03:23 PM PDT 7.51 feet High Tide Tue -- 08:08 PM PDT Sunset Tide / Current data from XTide NOT FOR NAVIGATION |
| 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
| 0.9 | 2.6 | 4.8 | 6.6 | 7.2 | 7 | 6.4 | 5.6 | 4.7 | 3.9 | 3.3 | 2.9 | 3.1 | 4.6 | 6.3 | 7.4 | 7.4 | 6.9 | 6 | 4.8 | 3.6 | 2.5 | 1.5 | 0.7 |
Tide / Current Tables for Vancouver, Washington - IGNORE HEIGHTS
EDIT (on/off) Help One Week of Data| Vancouver Click for MapNote: The Columbia River is subject to annual freshets. Short range predictions are available at local river forecast centers. The data for stations above Harrington Point apply only during low river stages. There is a tidal influence along most of the Tue -- 03:28 AM PDT 7.23 feet High Tide Tue -- 03:49 AM PDT Moonset Tue -- 06:09 AM PDT Sunrise Tue -- 11:01 AM PDT 2.90 feet Low Tide Tue -- 02:18 PM PDT Moonrise Tue -- 02:57 PM PDT 7.51 feet High Tide Tue -- 08:08 PM PDT Sunset Tue -- 11:48 PM PDT 0.36 feet Low Tide Tide / Current data from XTide NOT FOR NAVIGATION |
| 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
| 1.5 | 3.5 | 5.6 | 7 | 7.2 | 6.7 | 6 | 5.2 | 4.4 | 3.6 | 3.1 | 2.9 | 3.6 | 5.3 | 6.9 | 7.5 | 7.3 | 6.5 | 5.5 | 4.3 | 3.2 | 2.1 | 1.1 | 0.5 |
Weather Map and Satellite Images
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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 (8,2,3,4)
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Ground Weather Radar Station Portland, OR
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Disclaimer: The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program. |