Wednesday, May23, 2018 L-36.com


Marine Weather and Tides
Manson, WA

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 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.

Sunrise 5:12AMSunset 8:43PM Wednesday May 23, 2018 5:27 PM PDT (00:27 UTC) Moonrise 1:17PMMoonset 1:52AM Illumination 67% Phase: Waxing Gibbous; Moon at 9 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 232123
afdotx
area forecast discussion
national weather service spokane wa
223 pm pdt Wed may 23 2018

Synopsis
Scattered slow moving thunderstorms will develop this afternoon
and this evening. Locally heavy rain will be possible with
highest chance for heavy downpours over the central and southern
idaho panhandle. More showers and thunderstorms are expected
Thursday and Friday. Drier and seasonably warm conditions are
expected over the memorial day weekend.

Discussion
Tonight through Sunday... A complex but rather weak and broad upper
upper low is circulating over the northwestern states this
afternoon. Three distinct low centers are best resolved on water
vapor satellite... The strongest and most obvious over montana with
secondary weaker circulations over southern alberta and square
over eastern washington. The later circulation is triggering
thunderstorms over the forecast area this afternoon. So far these
storms have been largely confined to the mountains ringing the
basin but heating and instability will peak in another few hours
and it is expected that the vorticity energy in the cusp of the
low will allow storm initiation off of the mountains and in the
columbia basin itself for late this afternoon and evening. There
is at least a small chance of just about anywhere in the forecast
area receiving a hit between now and 10 pm or so... But the most
dense areal coverage will probably be concentrated over the idaho
panhandle and the palouse southward over washington. These storms
will be slow moving and wet pulse type cells... Capable of laying
down a lot of rain in a short period of time before weakening or
moving off. Localized flooding may be a problem this evening under
some of these storms.

Later this evening most high resolution models suggest an area of
decayed storms and showers pushing off to the northeast as the
upper low weakens and ejects to the northeast as a weak open
wave... And this will promote drying under downslope flow in the
cascades and deep basin while promoting lingering overnight
showers over the northeast mountains and idaho panhandle.

The ejection of the upper low will be stimulated by the approach
of the next upstream pacific trough... And the forecast area will
come under the influence of moist southerly flow ahead of this
feature on Thursday and Friday. There will be no cold front
yet... So high temperatures these two days will remain quite warm
but not as high as the previous few days. This flow regime with a
continued moist air mass will maintain an afternoon and evening
thunderstorm threat as well... But mostly confined to the
southeastern zones and idaho panhandle with no synoptic triggers
and orography playing the dominant convective initiation role.

Synoptic models are in good agreement in splitting the incoming
trough into a closed low once again taking up station over the
great basin Friday night and Saturday. This will allow a more
progressive northern branch short wave to transit the region
bringing a cold front and a cool down by Saturday with
temperatures moderating back into the 70s. This front will also
allow Saturday to remain a bit unsettled over the eastern zones
but the thunderstorm threat should be only marginal with a
stabilizing cooler air mass.

Sunday the region will be only weakly impacted by wrap-around
moisture from the great basin low... With a small residual shower
threat over the southern panhandle mountains while the remainder
of the forecast area enjoys a comfortably mild and generally
sunny day. Fugazzi
Monday through Wednesday: high pressure strengthens over the region
on Monday yielding mostly dry conditions and roughly five degrees
of warming from Sunday. Low pressure passing southeast of the
area will keep a small risk for showers and t-storms from the
camas prairie to southern shoshone county but confidence is not
high given a difference in model placement this far north.

Meanwhile, the next trough moves into the gulf of ak and begins to
swing toward the western us coastline. Medium range models agree
that this feature will swing through the NW but are struggling
with the timing which could range between Tuesday and Wednesday.

Nonetheless, the trough will usher a cold front into the area and
return temperatures back toward seasonal readings for much of the
week. The main threat for showers and any thunderstorms after
Monday will accompany the front but this does not look like an
overly wet system and most precipitation will focus in the
northern mountains and eastern mountains. Winds will be breezy
occasionally throughout the period with the first push arriving
Monday and continuing with the passage of the cold front Tuesday-
Wednesday. Gusts could be in the range of 20-30 mph. Sb

Aviation
18z tafs: the region will remain in a moist and unstable
air mass today with a weak upper level low pressure developing
over eastern washington. This will lead to isolated thunderstorms
this afternoon and evening over the columbia basin with scattered
thunderstorms over the mountains surrounding the basin... The idaho
panhandle and southeastern washington. TAF sites most at risk for
a thunderstorm between 21z and 03z will be klws... Kpuw and kcoe
with the kgeg and ksff TAF sites likely to be in the vicinity of
storms at times. Tonight storms will decrease and but showers will
remain mainly over the idaho panhandle. Drying conditions under
downslope flow will prevail at the kmwh and keat TAF sites. Mjf

Preliminary point temps pops
Spokane 59 80 58 80 56 72 60 10 10 10 30 30
coeur d'alene 59 79 55 80 54 71 60 20 10 20 40 30
pullman 58 76 55 77 53 66 60 10 10 10 50 30
lewiston 62 80 59 81 58 73 50 40 20 20 60 30
colville 57 82 53 84 54 79 50 30 20 10 20 20
sandpoint 56 78 52 80 53 72 50 30 20 20 40 40
kellogg 54 75 53 79 52 68 90 30 20 20 50 40
moses lake 60 86 56 83 55 78 20 0 10 10 10 10
wenatchee 61 84 58 82 55 77 40 0 10 10 10 10
omak 60 85 55 83 54 80 20 0 10 10 10 10

Otx watches warnings advisories
Id... None.

Wa... Flash flood watch until 8 pm pdt this evening for east slopes
northern cascades-okanogan highlands-okanogan valley-
wenatchee area.



Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Wenatchee - Pangborn Memorial Airport, WA33 mi33 minN 010.00 miFair88°F41°F19%1003.6 hPa

Wind History from EAT (wind in knots)
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Last 24hrSW7SW4CalmNW6NW5W3W6W9W6W6SW5W7W8W8W5W8W5W4E33E53--Calm
1 day agoSE4E4E4E5N6N8NW5NW7W6NW9NW8NW9W8W12W11SW7W65SW433CalmW5SW7
2 days agoSW9SW6W10NW11NW16NW14NW15
G22
NW13NW13NW12NW12NW11N10NW11NW12NW14NW10NW5Calm3343E3

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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Wind Forecast for Spokane, WA (20,4,5,8)
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Ground Weather Radar Station Spokane, WA
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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.