Thursday, April27, 2017 L-36.com


Marine Weather and Tides
Hornbrook, CA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:08AMSunset 8:08PM Thursday April 27, 2017 9:50 AM PDT (16:50 UTC) Moonrise 6:25AMMoonset 8:46PM Illumination 3% 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
PZZ330 1126 Pm Pdt Fri Aug 9 2013
.thunderstorms over the waters... Thunderstorms over the waters have weakened but isolated storms will continue overnight. Mariners can expect gusty and erratic winds with the storms along with frequent lightning. If caught on the open water stay below deck if possible...keep away from ungrounded metal objects. Lat...lon 4397 12411 4396 12411 4400 12413 4284 12455 4242 12440 4225 12441 4205 12428 4184 12422 4181 12580 4198 12579 4220 12589 4370 12576 4386 12565 4399 12562 4403 12414
PZZ300 842 Am Pdt Thu Apr 27 2017
Synopsis for the southern oregon coastal waters.. Weak high pressure over the waters will persist into early Friday with diminishing seas. Stronger high pressure offshore and a thermal trough along the coast will develop on Friday. This will result in gusty northerly winds...strongest south of cape blanco. The pattern will weaken slightly on Saturday but strengthen again early next week.

7 Day Forecast for Marine Location Near Hornbrook, CA
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location: 41.9, -122.57     debug


Area Discussion for - Medford, OR
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Fxus66 kmfr 271543
afdmfr
area forecast discussion
national weather service medford or
843 am pdt Thu apr 27 2017

Update There are a few showers along the coast and in the
umpqua basin up to the cascades, but the rest of the forecast area
appears mostly dry this morning. A weak upper level wave in the
swift northwest flow aloft will pass overhead this afternoon, briefly
enhancing shower activity along and west of the cascade crest.

Some showers may make it elsewhere, but will be isolated or
upslope based. The forecast appears to be on track this morning,
so no updates are necessary. For more information, see the
previous discussion below. -bpn

Aviation 27/12z TAF cycle... Weak disturbances will produce a few
showers through this evening north of the umpqua divide... Mainly at
the douglas and coos county coast and along the northwest facing
slopes. This will also result in areas of MVFR mainly due to low
ceilings. Conditions will improve late tonight withVFR into Friday.

Conditions will remainVFR south of the umpqua divide with mainly
scattered cloud cover through this evening. -dw

Marine Updated 800 am pdt Thursday, 27 april 2017... Weak high
pressure will persist over the waters into early Friday with
slowly diminishing moderate seas. The main decision was to issue a
small craft advisory for much of the waters south of CAPE blanco
from late Friday morning through Friday night. This will be due to
gusty north winds as high pressure strengthens offshore while a
thermal trough develops along the coast. Winds will be strongest
from 8 to 30 nm from shore in the waters south of gold beach. It
is not likely but there is a possibility that advisory strength
winds may extend farther north to around CAPE arago. The pattern
will weaken slightly on Saturday but strengthen again early next
week with advisory strength northerly winds likely to develop. -dw

Prev discussion /issued 256 am pdt Thu apr 27 2017/
discussion... Although the surface high pressure is building into
sw oregon, there is still plenty of low level moisture and enough
instability to generate afternoon showers. Snow levels will be
around 5000 feet today with another half an inch of new snow
possible at crater lake. Some clearing is expected tonight south
of the umpqua divide and valleys in josephine and jackson county
could see temperatures drop into the frost range.

The thermal trough will also build into the coastal area up to
around gold beach. This will enhance offshore flow and breezy
north to northeast winds at the upper slopes and ridges. This is a
short lived offshore flow and its main effect will be seen with
warm high temperatures at brookings and over the kalmiopsis area
on Friday.

Temperatures will start to warm this weekend into the seasonal
norms. A weak front is still on track to move across northern
oregon Saturday night and Sunday. The latest model is starting to
show the trough to be deeper than in previous runs and we could
see isolated showers Saturday night through Sunday morning as far
south as the rogue valley; although, precipitation amounts will be
very light for the medford area with a few hundredths of an inch
expected in the roseburg area. Aside for the east slopes of the
cascades in the klamath county, we are not expecting any
precipitation to spread east of the cascades or south into
northern california. This front will keep daytime temperatures
close to season norms Sunday through Tuesday.

The latest GFS and ECMWF continue to show upper level ridge
expanding north into the pac nw. Confidence is high that we could
see highs on Wednesday and Thursday rising to around 80 with lower
80s likely in the lower klamath river valley. Beyond Thursday the
models diverge as to be expected with the GFS maintaining the
very strong ridge whereas the ec starts to break this ridge down.

As we may be too early in the season for a strong ridge, we may
see another trough during the first weekend of may but confidence
is not very high at this point. /fb

Mfr watches/warnings/advisories
Or... None.

Ca... None.

Pacific coastal waters... Small craft advisory from 11 am Friday to 5 am pdt Saturday for
pzz356-376.

Bpn/fjb/dw


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CECC1 - 9419750 - Crescent City, CA 86 mi50 min NNE 6 G 8 51°F 54°F1022.8 hPa
46027 - ST GEORGES - 8NM West Northwest of Crescent City, CA 96 mi60 min NNE 7.8 G 9.7 51°F 53°F7 ft1022.6 hPa (+1.1)

Wind History for Crescent City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Montague Siskiyou County Airport, CA9 mi57 minN 310.00 miFair44°F30°F58%1022.4 hPa

Wind History from SIY (wind in knots)
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Last 24hrE3NE34SW5--W17
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NW7W8NE7N8N8N11N9N7N9N8N8N9N7N7N6N3N3
1 day agoSE3CalmSE5NW4Calm3S5W4S4NW6CalmNE7E4SW4W4S4CalmCalmCalmCalmW4CalmCalmCalm
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W9NW4W5W5NW9NW5NW6CalmN3NE3E4E4CalmNE3Calm

Tide / Current Tables for Crescent City, California
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Crescent City
Click for Map
Thu -- 12:23 AM PDT     7.67 feet High Tide
Thu -- 06:18 AM PDT     Sunrise
Thu -- 07:04 AM PDT     -1.41 feet Low Tide
Thu -- 07:32 AM PDT     Moonrise
Thu -- 01:28 PM PDT     6.36 feet High Tide
Thu -- 07:02 PM PDT     1.29 feet Low Tide
Thu -- 08:11 PM PDT     Sunset
Thu -- 09:51 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.67.56.54.72.60.6-0.8-1.4-10.323.95.46.36.25.54.22.81.71.31.72.84.36

Tide / Current Tables for Brookings, Chetco Cove, Oregon
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Brookings
Click for Map
Thu -- 12:24 AM PDT     7.67 feet High Tide
Thu -- 06:17 AM PDT     Sunrise
Thu -- 07:08 AM PDT     -1.41 feet Low Tide
Thu -- 07:31 AM PDT     Moonrise
Thu -- 01:29 PM PDT     6.36 feet High Tide
Thu -- 07:06 PM PDT     1.29 feet Low Tide
Thu -- 08:12 PM PDT     Sunset
Thu -- 09:52 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.67.56.54.82.70.7-0.8-1.4-10.223.95.46.26.25.54.22.81.81.31.62.74.35.9

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

GOES Local Image of CentralWestCoast    EDIT
Geos

Wind Forecast for Medford, OR (12,3,4,5)
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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.