Wednesday, November22, 2017

Marine Weather and Tides
Oroville, WA

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 7:20AMSunset 4:09PM Wednesday November 22, 2017 3:07 AM PST (11:07 UTC) Moonrise 11:43AMMoonset 8:43PM Illumination 14% Phase: Waxing Crescent; Moon at 4 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 Oroville, WA
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location: 49.16, -119.25     debug

Area Discussion for - Spokane, WA
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Fxus66 kotx 220941
area forecast discussion
national weather service spokane wa
141 am pst Wed nov 22 2017

Wet and mild weather will linger through the week as a series of
storm systems brings several rounds of precipitation to the inland
nw. Snow levels will be quite high through Thursday allowing
motorists to travel over mountain passes on wet pavement. Snow
levels will begin to lower just as travelers are heading home
over the weekend. Windy conditions are expected Thursday across
the exposed areas of the basin and into the spokane area and

Today through Friday morning... The warm front responsible for the
precipitation today has shifted to the eastern zones overnight as
the ridge axis amplifies and shifts east. Winds at the mid levels
have turned southwest-west this evening and this combination is
resulting in a break in the rain from the lower east slopes east
to about the wa id line that will last into this afternoon. The
upper level low currently in the eastern pacific will begin to
move towards the coast today. This will shift the ridge axis to
the east and allow the the warm front to sag back to the south for
another period of stratiform precipitation, mainly north of the
basin this afternoon, but continuing to sag south tonight and
Thursday. Model guidance is in pretty good agreement that the cold
front will cross the cascades Thursday afternoon with drying from
the west through Thursday evening. Southwest winds wind be on the
increase ahead and will peak Thursday afternoon and Thursday
evening in the well mixed atmosphere behind the front. We are
expecting sustained winds 20-30 mph with gusts 35-45 mph during
this period. With all of the warm air advection temperatures are
expected to be 12-16 degrees above normal today and Thursday.

* impacts: for today... Cooler temperatures up in the methow valley
are having a hard time warming up. Some light freezing frozen
precipitation has been reported overnight and a winter weather
advisory was issued for that. Temperatures in that area look to
finally warm up this morning with the precipitation turning over
to rain. For the remainder of the forecast period... Warm
temperatures and moderate rain even at the higher elevations
will result in good runoff and rising streams and small rivers.

At this time no flooding is expected. The exception is paradise
creek near moscow idaho which is very reactive to moderate
precipitation and snow melt. So far paradise creek has reached
action stage and that could happen again the next few days.

Lastly, the strong, gusty winds mentioned above will result in
tricky driving conditions for high profile vehicles and likely
some damage to tree branches and possibly some downed power
lines. A wind advisory will be possible for late in the day
Thursday. Tobin
Friday and Friday night: this will be the driest period of the
week with winds weakening into Friday. Weaker winds with the
potential for less mid to high level cloud cover will increase the
potential for fog Saturday morning. Another moist frontal system
will be approaching at this time though, so fog chances will
depend how fast that higher level cloud cover increases over the
region. Best chances will be in the mountain valleys as the
greater basin will see moisture mixing out of the boundary layer
with the winds on thanksgiving. After a mild thanksgiving,
temperatures will be cooler but still above season average.

Saturday through Tuesday: the forecast turns wet again over the
weekend. There are some slight timing difference between the 00z
ecmwf and GFS solutions with when a warm front will push up across
the area on Saturday. The timing difference isn't that substantial
and precip is expected to start up from the afternoon into the
evening over much of the region. The the cold front will push
across on Sunday and looks to stall across the southeast portion
of the region. Snow levels through Sunday will remain high with
precip falling as valley rain and mountain snow. The potential for
greater weather impacts will increase Sunday night into Monday.

Both the 00z GFS and ECMWF solutions show a dynamic upper level
trough of lower pressure pushing in off the eastern pacific during
this time. Both also show that this trough may form a closed
circulation with a surface low tracking into eastern wa. This is
significant since it will allow moisture to wrap up around the
northern mountain and into the east slopes of the northern
cascades as snow levels drop potentially down to valley floors.

Mid level laps rates will also be steepening and we could see rain
transitioning over to snow with periods of heavy snow possible.

Confidence in these kinds of details is low, but it does appear
to be the best potential for snow impacts down below pass levels
over the next seven days. Svh

06z tafs: expect additional bands of rain tonight into Wednesday.

An abundance of low level moisture will lead to stratus with ifr
and MVFR conditions. Downslope winds on the palouse and lewiston
area should keep conditions mainlyVFR for the next 24 hours although
a period of MVFR is possible at kpuw 10-15z. For kgeg ksff kcoe
there should be deteriorating conditions overnight as low level
winds shift from SE to upslope ssw. For keat kmwh an abundance of
lower level moisture with light and variable winds should result
in less in the way of changing conditions. Although two stratus
layers in the area near 500 and 1500 ft agl as of 06z leads to low
confidence of whether ifr or MVFR conditions will be more
prevalent. Jw

Preliminary point temps pops
Spokane 53 47 55 36 46 33 80 40 80 30 0 10
coeur d'alene 53 46 55 35 45 32 80 50 100 40 10 10
pullman 57 47 57 37 48 36 70 50 100 60 0 0
lewiston 59 49 62 39 52 38 80 30 50 70 0 0
colville 46 40 53 33 45 32 60 60 70 20 10 10
sandpoint 47 41 51 34 42 31 90 70 100 40 20 10
kellogg 50 42 51 34 42 32 80 70 100 80 40 0
moses lake 51 43 59 34 50 32 30 20 30 10 0 0
wenatchee 49 41 54 35 48 33 40 40 30 10 10 10
omak 48 41 54 34 45 33 20 40 50 10 10 10

Otx watches warnings advisories
Id... None.

Wa... Winter weather advisory until 4 am pst early this morning for
east slopes northern cascades.

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Omak Airport, WA50 mi75 minSSE 710.00 miOvercast39°F39°F100%1019.2 hPa

Wind History from OMK (wind in knots)
Last 24hrCalmS3SE4S3CalmE3CalmSE3CalmS3S3CalmS3S7S6S6S5SW5SW7S8S5E5S7S5
1 day agoCalmNE3CalmCalmCalmN4N3N6N7N8N6N5N9N12N8NE6N5E3W3CalmNW4NW3NW3Calm
2 days agoS4S7S5S6SW10S8SW9SW9SW11SW10S11S14

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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Weather Map
IR Satellite Image from GEOS

GOES Local Image of PacificNorthwest    EDIT

Wind Forecast for Spokane, WA (6,6,7,8)
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Ground Weather Radar Station Spokane, WA
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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 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 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.