Saturday, May27, 2017 L-36.com


Marine Weather and Tides
Coos Bay, OR

Version 3.4
What's New / NOTES
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 5:39AMSunset 8:48PM Saturday May 27, 2017 8:50 AM PDT (15:50 UTC) Moonrise 6:48AMMoonset 9:58PM Illumination 5% Phase: Waxing Crescent; Moon at 2 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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This is a Weather Statement Zone, please check the Date to see if it has expired
PZZ310 Coos bay bar- coastal waters from cape blanco or to pt. St. George ca out 10 nm- waters from cape blanco or to pt. St. George ca from 10 to 60 nm- 134 pm pdt Wed may 29 2013 a long-duration moderate to strong north wind event is expected to last from this weekend into early next week. Winds should begin to increase Friday into Saturday...peaking Sunday with storm force wind gusts possible. Very steep and hazardous waves will accompany this wind event and mariners should prepare for dangerous conditions at sea. The strongest winds and highest seas will occur beyond 5 nm from shore.
PZZ300 845 Am Pdt Sat May 27 2017
Synopsis for the southern oregon coastal waters..Fog and low stratus will persist with light and variable winds through the weekend. The thermal trough will redevelop Sunday into Monday and gradually strengthen through the first half of next week, bringing increasing north winds to the area. Small craft advisory winds and seas will likely develop south of cape blanco by the middle of next week.

7 Day Forecast for Marine Location Near Coos Bay, OR
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location: 43.38, -124.22     debug


Area Discussion for - Medford, OR
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Fxus66 kmfr 271007
afdmfr
area forecast discussion
national weather service medford or
307 am pdt Sat may 27 2017

Discussion Upper level ridging will strengthen over our area
today into Sunday and then slide just to our east Monday. A
surface thermal trough has already developed and its axis is
oriented north-south approximately right over medford at this
hour. It will remain over us today and then gradually shift east
in tandem with the upper ridge axis. The majority of us will see
sunny and warm to hot weather as a result of these features
through Monday. The exception is at the coast where onshore flow
will continue to pull marine stratus in over the area, especially
at night.

We do not expect any precipitation today, however, as the heat
builds, so will the instability, and it will eventually be
released in the form of thunderstorms. The instability will remain
capped by warm air aloft through today and probably much of
Sunday, and there really isn't much to trigger any convection.

However, we could see a thunderstorm or two pop up over the
cascades and or siskiyous later Sunday.

The better chance for thunderstorms still looks like Monday.

Moisture and corresponding instability become rather extreme by
Monday, and while the weak link still looks like the trigger, an
approaching trough will probably provide enough cooling aloft and
lift in the form of upper diffluence to get some storms going.

Furthermore, as mentioned by previous shifts, models are tending
to show a negative tilt to the trough as it approaches, and the
resulting steering flow being slightly east of due south could
bring a storm out over the west side. The adjustments made by
previous shifts to account for these factors, look good, and few
adjustments were made this morning. Given the extreme instability,
storms that do form will have the potential to become strong to
severe with large hail likely being the main threat.

By Tuesday, the incoming trough will have probably stabilized
things enough to preclude any thunderstorms from the cascade crest
westward, but thunderstorms remain possible on the east side.

It is notable that the GFS is an outlier in showing a very
negatively tiled trough approaching late Tuesday and a closed low
going right over us on Wednesday. As a result, the GFS solution
could bring thunderstorms back out over the west side Tuesday and
certainly would produce much cooler, wetter weather on Wednesday
than other solutions. That's not to say it's wrong, just that the
ecmwf and canadian models show a more open wave further north. For
what it's worth, although the NAM doesn't go out past Tuesday
morning, it appears supportive of the GFS idea. I've bumped
temperatures down for Wednesday, but I did not raise pops to
anywhere near what would be warranted if the GFS is right. -wright

Aviation 27 06z TAF cycle... Along the coast and over the
coastal waters... MVFR CIGS with areas of ifr CIGS vsbys will
prevail into Saturday morning... Clearing toVFR along the
immediate coast during the day Saturday. Mostly MVFR CIGS will
return to the coast Saturday evening. Over the remainder of the
area...VFR conditions will prevail through Saturday
evening... Except for late night to mid-morning ifr CIGS vsbys in
low clouds and fog in the coquille and very lower umpqua basins.

Marine Updated 200 am Saturday 27 may 2017... Fog and low
stratus will persist with light and variable winds through the
weekend. The thermal trough will redevelop Sunday into Monday and
gradually strengthen through the first half of next week, bringing
increasing north winds to the area. Small craft advisory winds
and seas will likely develop south of CAPE blanco by the middle of
next week. -bpn

Mfr watches warnings advisories
Or... None.

Ca... None.

Pacific coastal waters... None.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHAO3 - 9432780 - Charleston, OR 7 mi75 min SE 1.9 G 4.1 50°F1019 hPa
46229 - UMPQUA OFFSHORE, OR (139) 32 mi27 min 52°F7 ft
PORO3 - 9431647 - Port Orford, OR 47 mi51 min S 4.1 G 4.1 50°F 49°F1019.5 hPa (+1.3)

Wind History for Charleston, OR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
North Bend, North Bend Municipal Airport, OR4 mi56 minNNE 310.00 miOvercast55°F51°F88%1019.6 hPa

Wind History from OTH (wind in knots)
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Last 24hrCalmW9W8W8W9W8W10W10NW12NW7W7W6SW5SW6SW6SW6SW5S3CalmS3SE3CalmCalmNE3
1 day agoN8N11N13N19N18
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N8N7N7N6N6NE4NE6NE9

Tide / Current Tables for Coos Bay, Oregon
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Coos Bay
Click for Map
Sat -- 02:43 AM PDT     8.57 feet High Tide
Sat -- 05:41 AM PDT     Sunrise
Sat -- 07:48 AM PDT     Moonrise
Sat -- 09:35 AM PDT     -2.08 feet Low Tide
Sat -- 04:13 PM PDT     6.76 feet High Tide
Sat -- 08:46 PM PDT     Sunset
Sat -- 09:33 PM PDT     1.83 feet Low Tide
Sat -- 10:58 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.67.28.38.57.863.71.3-0.7-1.9-2-10.72.74.76.16.76.55.54.12.821.92.7

Tide / Current Tables for Charleston, Oregon
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Charleston
Click for Map
Sat -- 01:20 AM PDT     8.80 feet High Tide
Sat -- 05:42 AM PDT     Sunrise
Sat -- 07:49 AM PDT     Moonrise
Sat -- 08:16 AM PDT     -2.28 feet Low Tide
Sat -- 02:52 PM PDT     6.94 feet High Tide
Sat -- 08:13 PM PDT     2.17 feet Low Tide
Sat -- 08:47 PM PDT     Sunset
Sat -- 10:58 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.98.78.67.45.32.80.4-1.4-2.2-2-0.71.33.45.46.66.96.45.33.92.82.22.43.44.9

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of PacificNorthwest    EDIT
Geos

Wind Forecast for Medford, OR (11,2,3,4)
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Ground Weather Radar Station Medford, OR
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weather_mapweather_map weather_map

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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.