Wednesday, May23, 2018 L-36.com


Marine Weather and Tides
Coos Bay, OR

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 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.

Sunrise 5:42AMSunset 8:44PM Wednesday May 23, 2018 3:08 PM PDT (22:08 UTC) Moonrise 1:38PMMoonset 2:03AM Illumination 66% Phase: Waxing Gibbous; Moon at 9 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- 204 Pm Pdt Wed May 23 2018
Tonight..N wind 5 kt. Wind waves 2 ft or less. W swell 6 ft at 12 seconds. Areas of fog after midnight. Patchy drizzle after midnight.
Thu..N wind 5 to 10 kt. Wind waves 2 ft or less. W swell 5 to 6 ft at 11 seconds. Areas of fog in the morning. Patchy drizzle in the morning.
Thu night..N wind 10 to 15 kt. Wind waves 2 ft or less. W swell 4 to 5 ft at 11 seconds.
Fri..N wind 10 to 15 kt. Wind waves 2 ft or less. W swell 4 to 5 ft. Slight chance of showers.
Fri night..N wind 5 to 10 kt. Wind waves 3 ft in the evening... Becoming 2 ft or less. W swell 4 ft. Slight chance of showers.
Sat..N wind 5 kt...backing to nw in the afternoon. Wind waves 2 ft or less. Mixed swell W 4 ft and sw 2 ft.
Sat night..N wind 10 to 15 kt. Wind waves 2 ft or less. W swell 4 ft.
Sun..N wind 15 to 20 kt. Wind waves 3 ft...building to 4 to 5 ft. W swell 3 ft...building to nw 6 ft and sw 1 ft.
Mon..N wind 15 to 20 kt. Wind waves 4 to 5 ft. NW swell 6 ft.
PZZ300 204 Pm Pdt Wed May 23 2018
Synopsis for the southern oregon coastal waters..Light northerly winds with northwest swell will continue through Thursday. A thermal trough will develop on Friday along the coast and north winds and seas will gradually increase through the weekend. Gusty north winds and steep seas will primarily impact areas south of cape blanco this weekend, possibly expanding northward early next week.

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 232112
afdmfr
area forecast discussion
national weather service medford or
212 pm pdt Wed may 23 2018

Short term Today through Saturday night... A departing broad,
large-scale trough over the pacific northwest and an approaching
trough offshore will be the main weather players in the short
term. The departing trough will continue push off to the northeast
Thursday and the offshore trough will shear off into a cut-off
low that will gradually make it's way inland through Friday. By
Saturday, the cut- off low will be just east of the area and we'll
be under northerly flow on the back side of the low.

For the rest of today, showers and thunderstorms have already
developed in northern california and along and east of the cascades.

Cloud cover from earlier convection is limiting instability some
west of the cascades. However, behind this cloud cover, showers are
developing and expect this to continue as the clouds move north. Hi-
res models are still bringing convection through the rogue valley
late this afternoon and this seems reasonable. While the severe
potential looks limited, storms could be strong today with small
hail, gusty winds, and locally heavy rainfall. Storms will diminish
in coverage and intensity late this evening.

Conditions will be similar on Thursday as today, but a little more
stable with less diffluence aloft. As a result, thunderstorm
coverage will be less, but the same concerns remain for gusty winds,
hail, and locally heavy rain. As the cut-off low moves into central
california, shortwaves rotating around it will move into the east
side Thursday night into Friday. Given the remnant instability,
this shortwave provides the trigger to keep showers and
thunderstorms going overnight east of the cascades.

Friday will be much different than today and Thursday. Temperatures
will be significantly cooler and with much more cloud cover,
conditions will be much more stable. Moisture, however, will be
abundant and models are indicating significant rainfall, especially
east of the cascades, Thursday night through Friday night. 0.75" up
to 1.25" is possible east of the cascades with up to half an inch
possible east of the coast range and roseburg. So Friday looks to be
a showery, cool day with embedded isolated thunderstorms. The low
pressure pushes east on Saturday and most of the area will be dry.

Showers and thunderstorms will be possible for the far eastern
portions of the forecast area. Br-y

Long term Sunday through Wednesday... On Sunday, an upper low will
depart off to our east and a ridge begins building in from the west.

This should allow us to dry out and warm up, although it is of note
that the upper low will be in a very similar proximity to us as we
currently have today (and at least some of today's convection is
related to that low). Nevertheless, we've maintained the dry and
warmer forecast for Sunday.

The upper ridge axis moves right over us on Monday, and this is
expected to be the warmest day of the extended period. An open
trough (as opposed to our recent closed lows) then drops into the
pacnw Tuesday and Wednesday. Most of us won't notice much change
Tuesday, but we will see a chance for thunderstorms again from
central siskiyou county up across portions of the east side. The
bigger change comes Wednesday as temperatures cool by 5-10 degrees
area-wide with a continued threat for storms in similar locations to
Tuesday. -wright

Aviation 23 18z... The marine layer has deepened, and conditions
at the coast are generally MVFR and should stay MVFR through the
night. As for areas farther inland, the umpqua valley should see
clearing toVFR conditions this afternoon, and MVFR ceilings will
return tonight.

Further inland, generally east of the line from the illinois valley
to roseburg, thunderstorms are developing and will impact the area
through the evening. Expect gusty and erratic winds and heavy rain
with some of these storms. Late this evening, storms should
diminish. Sk

Marine Updated 200 pm pdt Wednesday 23 may 2018... Light northerly
winds with northwest swell will continue through Thursday. A thermal
trough will develop on Friday along the coast and north winds and
seas will gradually increase from around 15 kt Friday to 20 to 30 kt
by Sunday afternoon. Small craft advisory conditions are possible as
early as Saturday afternoon south of CAPE blanco. Then, small craft
advisory conditions could expand north of CAPE blanco early next
week. Sk

Mfr watches warnings advisories
Or... None.

Ca... None.

Pacific coastal waters... None.

Mnf trw nsk


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHAO3 - 9432780 - Charleston, OR 7 mi93 min W 6 G 8 52°F1013.6 hPa
46128 18 mi129 min NNW 3.9 53°F1027.3 hPa (+8.2)
46229 - UMPQUA OFFSHORE, OR (139) 32 mi76 min 55°F7 ft
PORO3 - 9431647 - Port Orford, OR 47 mi51 min WNW 9.9 G 12 56°F 47°F1013 hPa

Wind History for Charleston, OR
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Southwest Oregon Regional Airport, OR4 mi13 minNNW 610.00 miOvercast59°F52°F78%1013.8 hPa

Wind History from OTH (wind in knots)
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Last 24hr--N15
G22
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N10N9N9N7N7N4N4N4N3S3SE3CalmSW5W5NW6NW4W7NW6NW8NW6
1 day agoN23
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N9N3N5CalmCalmCalmN4NE5CalmCalmNW7N15N18
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2 days agoNW11NW13N12N13N9N9N8N8N7N7N8N10N9N4N5NE3SE3CalmNW4NW11N14N19N20N19
G25

Tide / Current Tables for Coos Bay, Oregon
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Coos Bay
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Wed -- 03:03 AM PDT     Moonset
Wed -- 03:23 AM PDT     1.96 feet Low Tide
Wed -- 05:44 AM PDT     Sunrise
Wed -- 09:06 AM PDT     5.72 feet High Tide
Wed -- 02:38 PM PDT     Moonrise
Wed -- 03:31 PM PDT     0.35 feet Low Tide
Wed -- 08:42 PM PDT     Sunset
Wed -- 10:16 PM PDT     6.79 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.73.52.522.12.73.64.55.35.75.54.73.52.21.10.40.41.12.33.75.16.26.86.6

Tide / Current Tables for Charleston, Oregon
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Charleston
Click for Map
Wed -- 02:06 AM PDT     2.14 feet Low Tide
Wed -- 03:03 AM PDT     Moonset
Wed -- 05:45 AM PDT     Sunrise
Wed -- 07:46 AM PDT     5.84 feet High Tide
Wed -- 02:12 PM PDT     0.35 feet Low Tide
Wed -- 02:38 PM PDT     Moonrise
Wed -- 08:43 PM PDT     Sunset
Wed -- 08:55 PM PDT     7.01 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.32.52.12.43.1455.75.85.44.43.21.80.80.40.61.42.84.35.86.776.65.6

Weather Map and Satellite Images
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wmap_P
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.
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Wind Forecast for Medford, OR (18,4,5,8)
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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.