Wednesday, March20, 2019

Marine Weather and Tides
Manson, WA

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 7:02AMSunset 7:15PM Wednesday March 20, 2019 2:11 PM PDT (21:11 UTC) Moonrise 5:58PMMoonset 6:19AM Illumination 100% Phase: Full Moon; Moon at 15 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 Manson, WA
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location: 47.88, -120.08     debug

Area Discussion for - Spokane, WA
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Fxus66 kotx 201002
area forecast discussion
national weather service spokane wa
302 am pdt Wed mar 20 2019

Dry and mild conditions will continue through Friday. Clouds and
the chance for showers will increase late Friday and persist into
the weekend. Temperatures over the weekend into early next week
will be pretty close to average with most locations climbing into
the 50s.

Today through Friday night... The dry and warm weather will continue
today as the omega block ridge has taken up residence along the
montana idaho border. This will place most of the region on the
west side of the ridge or in increased southerly flow at 500 mbs.

This backing flow will also translate closer to the ground which
will deliver even warmer temperatures than what we saw yesterday.

The forecast for afternoon temperatures will range from the upper
50s to mid 60s for most valleys and even a few upper 60s will be
possible. Another day of very warm temperatures will promote even
more snow melt than what we saw yesterday as the low-level snow
pack continues to ripen. The good news the snow pack has become
rather spotty across the columbia basin and western palouse and
after today it will even less expansive, so other than minor field
flooding, hydrology impacts in these areas will be minimal. In
valleys where snow cover is still significant (ie near the
cascades and across north idaho) the snow density is still far
from ripe so much of the snow melt today will soak into the
existing snow pack rather than resulting in excessive runoff. The
other good bit of news is the relatively dry air mass will promote
low temps at or below freezing. The one area that might need a
little closer inspection is around the palouse river and paradise
creek drainages as the snow ripeness around moscow mountain is
currently around 40% and with a couple more days of warm temps it
will near the 50% mark where runoff can become appreciable. At
this point, flooding is not expected on the palouse river but
significant rises are still possible at paradise creek in moscow.

By Thursday the upper level ridge shifts into central montana while
the the deep upper low associated with the western side of the
omega block moves into california. This will turn the low-level
winds to more of a northerly orientation and could deliver a
slight cooling in the lower atmosphere but this not certain as the
models have backed off on their cooling trends. Temps on Thursday
could actually be warmer than what we see today. We will also
begin to see an increasing cloud trend as high level clouds
associated with the california low begin to push northward late in
the day and remain over the area through Friday. Cooling of
Friday looks more certain as 850 mb temps drop several degrees
while insolation is reduced by the aforementioned cloud cover.

By late Friday night our recent string of dry weather will likely
come to an end as a cold front pushes into central washington
overnight. Light precipitation will be possible near the cascades
but most of the brunt of this front will be reserved for the
weekend. Fx
Saturday through Wednesday: our current mild and sunny weather pattern
will come to an end as a pair of weak storm systems swing into
the region from the eastern pacific. This will lead to an
increasing chance for showers and subtle cooling trend. With the
incoming air mass more maritime in nature, overnight lows will
actually see a net warming. The first trough swings into the
region Saturday and looks to undergo quite a bit of stretching and
weakening. Rainfall amounts around a tenth of an inch or less
will be common for most locations. Up to a quarter of an inch will
be possible around the camas prairie and possibly on a few ridge
lines near the canadian border. Snow levels on Saturday will be
around 6000 feet.

By Sunday... There are differences in the models with the northward
progression of this first wave of moisture. There are a handful
of models or model solutions that stall the moisture and threat
for showers across NE wa and id well through Sunday night keeping
the threat for showers alive. Those models that disagree suggest
the moisture will migrate into NW montana and southern canadian
with mostly dry weather. Utilizing a model blend of these
differences, we have maintained low chances but this carries lower
confidence. A second trough begins to swing to the coast and
inland Sunday night and Monday and this will be the kicker to send
this band northward. We should see a break in the shower activity
between these features roughly in the Monday time-frame then the
next round of showers moves into central wa by Monday evening and
spreads north northeast overnight into Tuesday. The cascades could
receive between a quarter and half inch of QPF from this system
while the remainder of the inland NW is closer to a tenth or less.

Snow levels on Monday night and Tuesday will be on the order of
4000-5000 feet which could lead to slushy accumulations at stevens
pass. A third system arrives on Wednesday bringing yet another
shot of rain and high mountain snow. Sb
this is not a pattern we typically get overly concerned for significant
flooding issues however given the unusually high lowland snow-
pack still in place... Minor flood issues will remain a possibility
into early next week. Afternoon highs will be cooling back into
the lower 50s... Very close to normal. Overnight lows will
fluctuate from the low to upper 30s. Rainfall, albeit light, will
add to runoff and continue to keep gravel roads that have recently
thawed soupy and poor drainage areas could continue to see small
ponds slowly form. Sb

06z tafs:VFR conditions with clear skies and light winds is
expected for at least the next 24 hours.

Preliminary point temps pops
Spokane 62 32 61 34 59 37 0 0 0 0 0 10
coeur d'alene 61 31 61 33 56 37 0 0 0 0 0 10
pullman 59 32 58 32 54 36 0 0 0 0 0 20
lewiston 64 37 63 39 58 44 0 0 0 0 0 30
colville 65 30 63 30 62 37 0 0 0 0 0 10
sandpoint 58 35 59 34 56 38 0 0 0 0 0 10
kellogg 60 34 60 35 57 38 0 0 0 0 0 20
moses lake 64 33 63 37 61 40 0 0 0 0 0 10
wenatchee 60 36 63 38 57 39 0 0 0 0 10 20
omak 62 36 62 37 58 40 0 0 0 0 0 20

Otx watches warnings advisories
Id... None.

Wa... None.

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Wenatchee - Pangborn Memorial Airport, WA33 mi17 minWSW 310.00 miFair54°F30°F40%1017.5 hPa

Wind History from EAT (wind in knots)
Last 24hrCalmCalmW3W3CalmNW6NW5NW5NW6W9W5W6W8W6W9W8NW6NW7W6W5W3CalmCalmSW3
1 day agoCalmCalmCalmCalmN4NW3N3NW4NW5NW4NW4NW10W8W7W5NW5W4NW5NW5W4CalmCalmCalmCalm
2 days agoCalmCalmSE3CalmE5E5CalmNW3NW4W7NW6NW7NW5N4NW3W4CalmN4W4W4W3CalmW3Calm

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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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 Spokane, WA (17,4,5,8)
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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.