Saturday, March23, 2019 L-36.com


Marine Weather and Tides
Rouses Point, NY

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:49AMSunset 7:11PM Saturday March 23, 2019 12:35 AM EDT (04:35 UTC) Moonrise 10:31PMMoonset 8:35AM Illumination 95% Phase: Waning Gibbous; Moon at 17 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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7 Day Forecast for Marine Location Near Hood River, OR
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location: 45.71, -121.53     debug


Area Discussion for - Portland, OR
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Fxus66 kpqr 230358
afdpqr
area forecast discussion
national weather service portland or
857 pm pdt Fri mar 22 2019
updated aviation and marine

Synopsis A cold front will continue to move northeast across the
forecast area this afternoon bringing a period of rain followed by
some showers tonight and Saturday. Dry conditions are expected
Sunday, before another series of frontal systems brings more rain
next week.

Short term Rest of today through Monday... Radar imagery shows a
narrow cold front moving across the region this afternoon, with the
back edge of the front starting to move into southwest oregon. This
front has generally brought up to 0.20 inches of rain to southern
portions of the forecast area and is expected to bring up to an
additional 0.10 inches to northern portions of the area. Snow levels
are currently above 5000 feet this afternoon so not expecting to see
accumulating snow at pass level today.

Models continues to show the cold front moving northeast across the
pacific northwest this evening ushering in a moist and unstable air
mass as the base of the upper level trough approaches the northern
california coast. This upper level trough will then move inland on
Saturday. Guidance continues to show a decent cold pool accompanying
the upper level trough, with modest mid level instability and weak
surface based instability aided by a weak shortwave disturbance and
daytime heating. Will continue to keep thunderstorms in the forecast
for Saturday. Snow levels are expected to lower to around 3000 feet
on Saturday, with another couple of inches of new snow possible in
the cascades but don't think we will reach advisory criteria. Also,
given the lowering snow levels can't rule out the chance that some of
the stronger showers may produce some small hail
shower chances will come to an end late Saturday as the upper level
trough moves east of the cascades and upper level ridging approaches
the region. Given a stabilizing air mass, residual surface moisture,
and light winds suspect most areas in the interior will see some
patchy fog develop Saturday night and linger into Sunday morning.

Otherwise, expect a rather pleasant Sunday with sunshine returning
for the afternoon and evening and temperatures climbing back into the
60s.

Rain chances will start to increase late Sunday as another cold front
approaches the region from the south. This front is expected to
approach the coast by Monday morning and move inland through the day
bringing another round of valley rain and a couple of inches of new
snow for the high cascades. 64

Long term Monday night through Friday... Active weather next week,
as a large upper-level trough sits off the coast of washington and
oregon most of the week, sending shortwaves into the pacific
northwest. Used the national blend of models primarily for
precipitation chances through next week because deterministic
guidance doesn't reflect the uncertainty in the timing of these
shortwaves that is reflected in more of a probabilistic forecast
produced by the nbm.

Monday night we will have lingering post-frontal showers from the
first of these shortwaves. Deterministic models (gfs and ecmwf) show
us drying out on Tuesday as we are between systems. The nbm,
however, keeps a chance of a few showers suggesting a the
possibility of weaker, unresolved shortwaves generating a few
showers on Tuesday. Have left a chance of showers in the forecast on
Tuesday. Wednesday, deterministic models show another shortwave
moving in, and this is supported by an increase in chance for rain
in the nbm. Therefore, have likely pops in the forecast for
Wednesday. Thursday, the trough that has been sitting offshore all
week finally starts to weaken and move onshore. This will keep
showers over our area through Thursday. There is greater uncertainty
on Friday, with some guidance showing the development of an upper-
level ridge starting Friday into next weekend, which would dry us
out, or the pattern turning to more zonal flow which could keep a
chance for showers on Friday. For that reason, the nbm keeps a
chance for showers on Friday. The nbm does show a trend toward lower
pops, however, suggesting most of the ensemble members are leaning
toward drier conditions Friday going into next weekend. -mccoy

Aviation Showery precipitation will taper off throughout
tonight for inland locations.VFR conditions prevail through the
morning hours as a mixture of mid and high stratus clouds remain
in the postfrontal airmass. Fog lower CIGS could be seen inland
as winds are starting to diminish. This could create areas of
MVFR which could develop into ifr conditions towards the late
evening or early morning timeframe.

Kpdx and approaches... Postfrontal showers still remain, but are
moving quickly out of the area.VFR conditions will remain
through most of the night. CIGS could bring MVFR conditions
around 16z-18z.VFR conditions look to return by 20z-22z. 42

Marine a showery post-frontal air mass will remain over the
waters through Saturday, with a slight chance of thunderstorms
over the waters during this time. Winds will remain fairly quiet
through the weekend. The next system looks to weaken as it enters
our waters Sunday night into Monday. However, this could bring
back small craft advisory winds. The weather looks to be active,
but no significant storms are forecasted at this time.

Seas have now built into the low teens, with a dominant period
of around 16 seconds. Seas will be peak around 12 to 14 ft tonight.

Seas likely to remain above 10 ft well into Saturday night,
before subsiding early Sunday. Seas then remain below 10 ft for
most of next week, although they may briefly build back up near
10 ft with the Monday system. Pyle 42

Pqr watches warnings advisories
Or... None.

Wa... None.

Pz... Small craft advisory for hazardous seas until 11 am pdt Sunday
for coastal waters from CAPE shoalwater wa to florence or
out 60 nm.

Small craft advisory for rough columbia river bar until 11 am
pdt Sunday.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 80 mi36 min 45°F1017.3 hPa (+1.8)

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Wind History from CZK (wind in knots)
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Last 24hr24------------------------SW12
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1 day ago53------------------------322SW632SE2E21S2
2 days ago----------------------------1214334434

Tide / Current Tables for Ellsworth, Washington - IGNORE HEIGHTS
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Vancouver, Washington - IGNORE HEIGHTS
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Tide / Current data from XTide NOT FOR NAVIGATION
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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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Portland, OR (0,6,7,8)
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Ground Weather Radar Station Portland, 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.