Marine Weather and Tides
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 7:14AM||Sunset 7:26PM||Monday March 19, 2018 8:45 PM PDT (03:45 UTC)||Moonrise 7:50AM||Moonset 9:00PM||Illumination 11%|
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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 820 Pm Pdt Mon Mar 19 2018 |
Synopsis for the southern oregon coastal waters..Relatively calm weather is expected into Wednesday. Weak low pressure will move into the waters Wednesday evening followed by a strong cold front late Wednesday night. Breezy south winds may pick up briefly ahead of this front south of cape blanco. Another front will arrive Thursday afternoon with winds becoming southwest and increasing close to small craft. An active weather pattern will continue Thursday night into next weekend. Seas are expected to become elevated Thursday night into Saturday.
7 Day Forecast for Marine Location Near Harbor, ORHourly EDIT Help
Area Discussion for - Medford, OR  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus66 kmfr 200306|
area forecast discussion
national weather service medford or
806 pm pdt Mon mar 19 2018
Update A weakening upper level low just offshore will
gradually slide to the east this evening and tonight. The energy
aloft is producing little more than virga and increased
cloudiness this evening, but as the low inches closer and passes
overhead, increased lift along the siskiyous and cascades could
kick off a few heavier showers, and precipitation form these
should be able to reach the ground. Prevailing winds will push
these showers to the north and east, so northern lake and klamath
counties could see some light rain or snow overnight and into the
early morning as well. Have made a few updates this evening to
bring the forecast in line with latest observations, adjusting
slightly the locations of the best chances for showers this
evening will be, and adding some slightly stronger winds to the
shasta valley and the coastal mountains.
The main event holds off a bit more, arriving in the afternoon
and evening tomorrow with more widespread and significant
precipitation. For more information on this and the rest of the
forecast, see the previous discussion below.
Aviation 20 00z TAF cycle...VFR conditions are expected for most
locations through the TAF period. Upper level clouds can create
partial obscuration of mountains and higher terrain with CIGS around
7000 to 15000 feet. Look for some virga too as showers are showing
up on radar. Precipitation and a slight chance for some showers is
expected to continue through the TAF period even though it's not
included in some of the TAF forecasts.
Marine Updated 800 pm pdt Monday 19 mar 2018... .Relatively quiet
weather will remain over the waters into Wednesday. South winds
could increase over the southern waters Wednesday afternoon and
evening, but much will depend on the exact location of an approaching
front. If nothing else, it should remain below small craft.
The aforementioned front will move onshore late Wednesday night with
winds shifting to the west to northwest. An upper trough will dig
south over the waters Thursday afternoon. At the same time pressure
gradients will increase resulting in increasing southwest winds late
Thursday afternoon and evening. Small craft conditions are possible
during this time, especially over the northern waters with steep
wind driven seas.
There is increasing confidence we'll have an increasing west to
northwest swell arriving Thursday night into Friday. There is still
some variations with the timing and wave height, however the the
general consensus we could see wave heights between 11 and 13 feet.
Keep in mind the details are likely to change, so watch for updates
Also cold air aloft will move over the waters Thursday night into
Friday. Convective showers will be plentiful, but we'll also have to
keep a close watch on isolated thunderstorms.
Unsettled weather and elevated seas are expected to continue into
Prev discussion issued 248 pm pdt Mon mar 19 2018
short term... Tonight through Thursday evening... Current
satellite observations are showing a few clouds moving inland from
the offshore cloud shield associated with that low pressure
system. Although the radar is showing extremely light echos
associated with it, precipitation does not appear to be falling at
the 2 o'clock hour. The short- term forecast, however, remains
active as the next systems are poised to arrive.
A few light showers are expected to build in later this afternoon
as the shortwave moves through. These showers will be mainly
concentrated across the coastal range, the umpqua divide and along
the cascades near crater lake. These showers will continue to
build in number overnight as the next system approaches the west
coast. This atmospheric river will bring periods of moderate to
heavy precipitation over the next few days, but the bulk of the
precipitation is expected to occur on Wednesday. Snow levels will|
rise to about 5000 to 6000 feet, so only the highest elevations of
the cascades, including the crater lake rim, will see snowfall.
The rain is not expected to be heavy enough to bring about any
flooding or flash flooding concerns. Additionally, although the
rain will be beneficial to our ongoing rainfall deficits, it will
not be a drought buster for us since the majority of the
precipitation will be falling south of our area. That being said,
the main focus on the precipitation will be across the southern
oregon coast near brookings, the coastal range, and western
siskiyou county. For the east side (especially in modoc county), a
couple of the models are showing the possibility for a rumble of
thunder on Thursday. Traditional indicators (cape, li) are modest
so it cannot be ruled out, but confidence is not high enough to
add it into the forecast quite yet.
In addition, winds will begin to pick up along with this system.
The windiest places will be along the east side as well as the
shasta valley where advisory level winds will be possible. It is,
unfortunately, a bit too early for putting out wind advisories--
especially because confidence is lower now that this atmospheric
river continues to trend southward. Will need to continue
evaluating whether or not any headlines will be warranted.
This system will transition into a more traditional frontal
boundary Thursday night, and thus the long-term discussion will
talk about the impacts associated with the second portion of this
long term... Thursday night through Monday... Indeed, by this time
frame, we will have shifted into astronomical spring. However,
winter will keep a firm grip on the weather as multiple disturbances
swing through the area beneath a deep, anomalous upper trough.
The first front will shift east of the area Thursday evening. The
cold pool aloft offshore will arrive overnight at the coast, and
then Friday morning west of the cascades. One disturbance will move
through the area Friday, then another Friday night, followed by one
more on Saturday. The core of the cold air mass associated with this
trough (-35 to -38c) is colder than the one that moved through the
area late last week. So once again, we'll be looking at very low
snow levels with the potential for snow on the valley floors Friday
through Saturday (especially if the timing of precipitation is
This time of the year, it's pretty hard for snow to accumulate much
at the lower elevations given the warming of the ground and the
higher march Sun angle. This is especially true during the daylight
hours, but if precipitation arrives at night or very early in the
morning, there could be snow accumulation down as low as 500-1500
feet in some areas. This is possible both early Friday and Saturday
mornings. While each valley west of the cascades seems to have its
own microclimate, perhaps the most vulnerable to this type of
situation is the illinois valley, where locally heavier
precipitation can really drag down the snow level at times. Right
now, it's too early to say for certain how much snow will fall, but
this event will continue the late winter trend of building the
mountain snow pack. This is good news with respect to water storage,
since most areas are still running significant precipitation
deficits for the water year. But, it's not so great news for
travelers, as there'll likely be snow impacts, perhaps at low
elevations, but especially over the higher passes.
The expected cold weather also presents an issue for local
agriculture, especially this weekend west of the cascades as the
upper trough lifts out. Cloud cover showers will be the limiting
factor for freezing temperatures, but if there's enough clearing
Saturday night or Sunday night, temperatures could drop into the 20s
in the typically colder spots.
Model guidance shows another disturbance arriving in the NW flow by
early next week, with perhaps another bout of precipitation for the
forecast area Monday Tuesday. -spilde
Mfr watches warnings advisories
Pacific coastal waters... None.
Bpn czs bms mas map
Weather Reporting StationsEDIT (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|
|46027 - ST GEORGES - 8NM West Northwest of Crescent City, CA||15 mi||56 min||N 3.9 G 3.9||52°F||53°F||4 ft||1017.1 hPa (-1.5)|
|CECC1 - 9419750 - Crescent City, CA||21 mi||46 min||NE 2.9 G 4.1||51°F||51°F||1016.8 hPa (-1.9)|
|PORO3 - 9431647 - Port Orford, OR||49 mi||52 min||N 5.1 G 7||54°F||51°F||1018.1 hPa|
Wind History for Crescent City, CA(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Brookings, Brookings Airport, OR||2 mi||50 min||N 0||10.00 mi||Mostly Cloudy||51°F||37°F||59%||1019 hPa|
|Crescent City, Jack McNamara Field Airport, CA||18 mi||1.8 hrs||N 0||5.00 mi||A Few Clouds with Haze||55°F||45°F||69%||1018.1 hPa|
Wind History from BOK (wind in knots)
|1 day ago||Calm||E||Calm||NE||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||SE||SW||NW||W||W||Calm||Calm||Calm|
|2 days ago||NE||Calm||Calm||Calm||Calm||E||Calm||SE||Calm||Calm||Calm||Calm||S||Calm||W||NW||W||Calm|
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Mon -- 01:32 AM PDT 6.80 feet High Tide
Mon -- 07:21 AM PDT Sunrise
Mon -- 07:47 AM PDT 0.69 feet Low Tide
Mon -- 08:49 AM PDT Moonrise
Mon -- 01:49 PM PDT 6.39 feet High Tide
Mon -- 07:28 PM PDT Sunset
Mon -- 07:54 PM PDT 0.87 feet Low Tide
Mon -- 10:00 PM PDT Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Tide / Current data from XTide NOT FOR NAVIGATION|
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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.
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Wind Forecast for Medford, OR (23,6,7,8)(on/off)  Help
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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.