Tuesday, October17, 2017 L-36.com


Marine Weather and Tides
Coos Bay, OR

Version 3.4
What's New / NOTES
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.
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 7:33AMSunset 6:30PM Tuesday October 17, 2017 1:31 PM PDT (20:31 UTC) Moonrise 4:12AMMoonset 4:55PM Illumination 7% Phase: Waning Crescent; Moon at 27 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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PZZ350 Coastal Waters From Florence To Cape Blanco Or Out 10 Nm- 819 Am Pdt Tue Oct 17 2017
.gale watch in effect from Wednesday evening through Thursday morning...
Today..SE wind 5 to 10 kt. Wind waves 2 ft or less. SWell nw 6 to 7 ft at 11 seconds.
Tonight..NW wind 5 kt early in the evening...becoming variable less than 5 kt, then...becoming S 5 kt after midnight...rising to 10 to 15 kt. Wind waves 2 ft or less. NW swell 7 to 8 ft at 11 seconds. Slight chance of rain.
Wed..S wind 10 to 20 kt...rising to 20 to 25 kt late in the afternoon. Wind waves 2 ft or less...becoming 3 to 4 ft in the afternoon. SWell nw 6 to 7 ft at 10 seconds.
Wed night..S wind 20 to 25 kt...becoming 30 kt after midnight. Wind waves 5 to 7 ft...building to 7 to 9 ft after midnight. W swell 6 ft...building to 8 to 9 ft after midnight. Chance of rain.
Thu..S wind 30 kt...easing to 20 to 25 kt in the afternoon. Wind waves 8 to 11 ft. W swell 10 ft...building to 12 ft in the afternoon. Rain.
Thu night..SW wind 10 to 15 kt. Wind waves 5 to 7 ft... Subsiding to 4 to 5 ft after midnight. SWell W 18 to 20 ft. Showers and slight chance of tstms.
Fri..SW wind 10 to 15 kt...becoming 15 kt in the evening, then...backing to S after midnight. Wind waves 5 to 6 ft... Subsiding to 4 ft after midnight. W swell 19 ft...subsiding to 16 ft.
Sat..S wind 30 kt...rising to gales 35 kt in the afternoon, then...easing to 30 kt. Wind waves 8 to 10 ft. SWell W 12 to 13 ft.
PZZ300 819 Am Pdt Tue Oct 17 2017
Synopsis for the southern oregon coastal waters..An approaching front will brush the forecast area north of cape blanco and introduce southerly winds there with northerly winds south of cape blanco. Seas will be dominated by short period northwest swell. Winds will switch to southerly Wednesday across the waters and increase ahead of a strong cold front Wednesday night to Thursday morning. Gales are possible cape blanco northward. Long period and large northwest swells build into the waters late Thursday into Friday behind the front, creating dangerous surf and bar conditions.

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


Area Discussion for - Medford, OR
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Fxus66 kmfr 171500
afdmfr
area forecast discussion
national weather service medford or
800 am pdt Tue oct 17 2017

Discussion 17 12z NAM in.

The northern hemispheric map is a bit amorphous this
morning... Just a blob of cool air centered at the pole with a
hard-to-discern wave number... Four maybe? However, this will
change later this week as the pattern transitions to a
progressive wave pattern. This will correspond with a transition
to an active weather pattern for the pacific northwest.

For now, flat ridging is in place over the west coast and a short
wave embedded in the flow will move onshore later this morning and
early this afternoon. This wave will push a weak front onshore. It
will bring some light precipitation to the north coast and lower
umpqua basin along with some gusty winds over the ridges and east
side this afternoon and evening. Overall the impacts will be
light.

The ridge, what there is of it, will break to the east of the cwa
Wednesday and southwest flow aloft will increase over the area as
a long wave trough deepens offshore. This will open the storm
door, and short waves ejecting from the offshore trough will
barrel through it.

The first few waves will be weak and the impacts will be similar
to the system moving onshore today. However, a much stronger one
will move onshore Thursday, and this will support a wet and windy
front which will also move onshore Thursday.

The mid shift summarized the impacts of this system well and they
are listed below:
*impacts: ponding on roadways, debris flows near burn scars near
the coast and western siskiyou county.

*slippery, snow-covered roads over the higher passes in the
cascades near crater lake and diamond lake. Light snow on highway
140 near lake of the woods.

*travel may become difficult for high profile vehicles due to
strong southerly winds along the coastal headlands, shasta
valley, and east of the cascades.

*isolated trees may fall near burn scars due to high winds.

Snow levels will start off above 8000 feet on Thursday and will
drop to 4000 to 4500 feet by Friday evening as the precipitation
comes to an end. Some of the higher passes could see some moderate
snow, particularly near crater lake and diamond lake; but lower
passes like highway 140 near lake of the woods will only see light
snow. Siskiyou summit may see a few flurries on Friday, but it is
more likely that the precipitation will end before it changes
over to snow.

Precipitation totals will be significant, especially at the
coast. Rain rates will be less than a quarter of an inch an hour,
but some coastal areas could see 1.5 inches in 6 hours and some
inland areas will get 1 inch in 6 hours. Rivers are still low and
soils are dry from the summer, but a few impacts could still be
felt, particularly for coastal rivers.

This will be one of the first wind events in our forecast area
for the season. The strongest winds will occur at the coast
Wednesday night into Thursday with shasta valley and east side
winds ramping up Thursday into Friday morning. This could create
some travel difficulties, especially for high profile vehicles.

There may be some treefalls due to the winds, particularly near
recent burn scars.

The long wave upper trough will move onshore Friday, and short
waves will continue to move through the trough. This will support
widespread shower activity into Friday. The offshore upper level
ridge will amplify as it approaches the coast, and this will cause
the front to lift back north as a strong and quite wet warm front
Saturday, followed by a weaker trailing cold front Saturday night
into Sunday.

The offshore ridge will be quite strong by this time just off the
coast. Low level flow will turn easterly Sunday night into Monday,
so the area will dry out quickly at that time. Easterly flow will
weaken Monday into Tuesday, but it will remain dry with no
incoming systems initially. A weak front may bring some
precipitation to the north coast and umpqua basin Wednesday.

Aviation 17 12z TAF cycle... At the coast, fog and low ceilings
have set up ifr from port orford northward and extends in patches
into the umpqua basin including in the vicinity of krbg. This
will remain until about 18z today before lifting toVFR. That
being said, the stratus layer may remain near krbg until the
afternoon. Have brought krbg toVFR in the TAF because that seems
more likely. Elsewhere,VFR is expected to continue through the
next 24 hours. -schaaf

Marine Updated 200 am pdt Tuesday 17 october 2017... High
pressure to the southwest will maintain north winds through
tonight from CAPE blanco southward. Meanwhile, late this morning
an approaching front will brush the forecast area north of cape
blanco and introduce southerly winds there. Seas today will be
dominated by short period northwest swell. Winds will switch to
southerly Wednesday across the waters and increase ahead of a
strong cold front Wednesday night to Thursday morning, with gale
force winds possible mostly from CAPE blanco northward. Long
period and large northwest swells (around 20 feet at 17 seconds)
build into the waters late Thursday into Friday behind the front,
creating dangerous surf and bar conditions.

A warm front is expected to approach the coast late Friday night
into Saturday. Confidence is moderate to high that we could see
another round of gale force winds and hazardous seas. Sk fb

Hydrology The system arriving on Wednesday night into Friday
will provide a few hydrologic concerns. Although soils are dry and
rivers are low; there will be enough rain that ponding on roadways
could become a problem for areas of curry, coos, josephine, and
western siskiyou counties. Additionally, debris flows near recent
burn scars will be possible. If you come across a flooded road,
find an alternate route. Remember to turn around, don't drown.

Furthermore, for coastal rivers like the chetco river and the
pistol river, the recent burn scars have left quite a bit of
debris to float down the river with the heavy rains creating
dangerous bar conditions near the port of brookings. -schaaf

Mfr watches warnings advisories
Or... None.

Ca... None.

Pacific coastal waters... Gale watch from Wednesday evening through
Thursday morning for pzz350-356-370-376.

15 15 08


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHAO3 - 9432780 - Charleston, OR 7 mi56 min E 5.1 G 7 50°F1022.8 hPa
46260 15 mi182 min 52°F8 ft
46128 18 mi152 min 5.8 1023.4 hPa
46261 26 mi182 min 52°F7 ft
46229 - UMPQUA OFFSHORE, OR (139) 32 mi39 min 55°F8 ft
PORO3 - 9431647 - Port Orford, OR 47 mi44 min WNW 8 G 12 61°F 50°F1022.1 hPa

Wind History for Charleston, OR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Southwest Oregon Regional Airport, OR4 mi36 minE 510.00 miFair62°F50°F65%1023.1 hPa

Wind History from OTH (wind in knots)
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Last 24hrN9N13N13N16N15N12N7N6N4CalmSE4S4S4SE3SE5SE5SE7SE8SE8SE4SE9SE9SE6E5
1 day agoN8N12N12N12N13N7N9N6NE4S3SE4SE5--SE3CalmSE4SE4SE5SE3E3CalmCalmW7NW5
2 days agoE6NE9NE11N11N9N7N4NE6N5N5CalmN7NE4N5NE6N4N6N6N6N5N4W3N7N9

Tide / Current Tables for Coos Bay, Oregon
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Coos Bay
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Tue -- 12:13 AM PDT     6.84 feet High Tide
Tue -- 05:12 AM PDT     Moonrise
Tue -- 06:24 AM PDT     0.49 feet Low Tide
Tue -- 07:33 AM PDT     Sunrise
Tue -- 12:48 PM PDT     7.43 feet High Tide
Tue -- 05:55 PM PDT     Moonset
Tue -- 06:29 PM PDT     Sunset
Tue -- 06:58 PM PDT     0.69 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.86.65.74.32.71.30.60.61.52.94.66.17.27.46.85.63.92.31.10.71.12.23.75.3

Tide / Current Tables for Charleston, Oregon
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Charleston
Click for Map
Tue -- 05:06 AM PDT     0.52 feet Low Tide
Tue -- 05:12 AM PDT     Moonrise
Tue -- 07:34 AM PDT     Sunrise
Tue -- 11:26 AM PDT     7.68 feet High Tide
Tue -- 05:40 PM PDT     0.82 feet Low Tide
Tue -- 05:55 PM PDT     Moonset
Tue -- 06:30 PM PDT     Sunset
Tue -- 11:44 PM PDT     7.21 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.65.43.82.210.50.923.65.36.87.67.56.75.23.5210.91.62.94.567

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 (16,3,4,5)
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Ground Weather Radar Station Medford, 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.