Sunday, May20, 2018 L-36.com


Marine Weather and Tides
Sandpoint, ID

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 5:00AMSunset 8:27PM Sunday May 20, 2018 5:57 PM PDT (00:57 UTC) Moonrise 10:23AMMoonset 12:53AM Illumination 36% Phase: Waxing Crescent; Moon at 6 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 Sandpoint, ID
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location: 48.28, -116.54     debug


Area Discussion for - Spokane, WA
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Fxus66 kotx 202337
afdotx
area forecast discussion
national weather service spokane wa
437 pm pdt Sun may 20 2018

Synopsis
A risk for scattered showers, along with a few thunderstorms,
will linger over the region into Monday. A significant warming
trend is forecast this week. A broader area of showers and
thunderstorms is possible late Wednesday into Thursday. Friday
should be a dry day, before shower and thunderstorm chances
increase over the memorial day weekend.

Discussion
Tonight and Monday: the upper level trough will push into
california tonight. As it does, it is sending some pieces of
energy up in the southerly flow into oregon, idaho and washington.

Showers and isolated thunderstorms have developed across portions
of eastern wa and north central id this afternoon. These areas of
showers are moving pretty slow, about 10-20 mph toward the north.

Expect some moderate to heavy rain with showers or thunderstorms
that do develop. The high resolution models have a pretty good
handle on stuff that is developing across SE wa and nc id. They
show it shearing apart and weakening btwn 6-8pm. Showers will be
possible through the evening and overnight hours across the camas
prairie and into the blue mountains as energy continues to rotate
around as the trough pushes into southern ca. The high resolution
models do not have a good handle however on the showers that are
moving up the eastern columbia basin around ritzville. Would
suspect that they will decrease after 6pm as well. Monday the
ridge axis will begin to push into washington. This will bring
some warming temperatures and drier air to central wa. The idaho
panhandle will remain unsettled as afternoon showers and
thunderstorms will be possible. We will start our warming trend
with temperatures 4-8 degrees above average; or valley
temperatures in the mid 70s to around 80. Nisbet
Monday night through Friday: a rex block pattern sets up
initially with a closed low over the southwest us and a blocking
high over SE bc and alberta. This should leave our region mostly
dry Monday night and Tuesday except for a threat of isolated
showers and thunderstorms over the higher terrain of SE washington
into the idaho panhandle where some lingering moisture and
instability will lie. On Wednesday the high moves east while the
low over the southwest us lifts north over idaho. Mid level
moisture and instability increases over the region with surface
based CAPE of 1000-1500 j kg. Latest guidance leans towards
afternoon convection in the cascades, SE wa, N idaho especially
over the higher terrain with the chances for showers and
thunderstorms expanding north and west in the evening to include
the columbia basin and spokane coeur d'alene area. Elevated
instability lingers overnight into Thursday morning over eastern
wa N idaho for a continued chance of showers. Convection should
become focuses mainly over the higher terrain of N idaho Thursday
afternoon with the exiting wave. Friday should be a dry day as
upper ridge moves in. Temperatures will remain well above normal
through this forecast period.

Memorial day weekend: current model solutions show an increasing
threat of showers and thunderstorms over the memorial day weekend.

On Saturday a large closed low sits off the northern california
coast with southerly flow aloft ahead of it over the region. There
may be enough moisture instability ahead of the low for a
shower thunderstorm threat Saturday but confidence is low.

Saturday night Sunday the low ejects northeast with a strong wave
tracking through. Showers and thunderstorm chances increase along
with winds as well as significant cooling by the end of the
memorial day weekend. It is too early to tell degree and
intensity of convection but something we will be monitoring for
the next several days. Jw

Aviation
00z tafs: an unstable upper trough will provide a threat of isold
to sct -shra and maybe an isold -tsra over the columbia basin
through the central and southern panhandle, with mainly isold -shra
toward the northern mountains. These best threat around TAF sites
will be around puw lws, with smaller chances near coe sff geg mwh eat.

These will be capable of heavy downpours and small hail. The
threat wanes at most TAF sites after 02-03z with the loss of
daytime heating. The threat continues through the night into early
Monday near puw lws in proximity to an embedded shortwave and
lingering instability. PrimarilyVFR conditions are expected, but
brief MVFR conditions possible in any heavier cells. J. Cote'

Hydrology
Mountain snow melt issues continue to promote mainstem flooding
on a couple rivers. Temperatures will warm through the week to
well above normal for this time of year resulting in additional
snow melt and high levels on most area rivers streams.

Flood warnings remain in effect for the following rivers and
lakes
lake pend oreille affecting bonner county
pend oreille river below albeni falls affecting bonner and pend
oreille counties
okanogan river near tonasket affecting okanogan county
an areal flood warning continues over okanogan county for the
lake shore of lake osoyoos... And the possibility of recent
rainfall runoff flooding on the salmon creek from conconully to
okanogan.

Preliminary point temps pops
Spokane 54 76 56 82 60 82 10 0 0 0 0 10
coeur d'alene 53 75 52 82 55 82 0 20 0 10 10 20
pullman 53 70 51 79 55 79 20 10 0 10 10 20
lewiston 58 76 57 84 61 83 20 10 10 10 10 20
colville 51 78 49 88 55 88 10 0 0 0 0 10
sandpoint 50 75 48 81 55 81 0 0 10 10 10 20
kellogg 50 71 48 79 51 79 50 50 10 10 10 30
moses lake 53 80 51 86 58 89 0 0 0 0 0 0
wenatchee 54 80 56 86 61 88 0 0 0 0 0 10
omak 54 79 54 86 59 87 0 0 0 0 0 10

Otx watches warnings advisories
Id... None.

Wa... None.



Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sandpoint, Sandpoint Airport, ID2 mi62 minESE 310.00 miFair73°F42°F33%1010.8 hPa

Wind History from SZT (wind in knots)
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Last 24hrE4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNE3N5SE3CalmSE3E3E5E6E5Calm
1 day agoNE12NE11NE10NE11
G17
N12
G22
N15
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N14
G19
N12
G21
NE14NE13
G21
NE13NE11NE9
G16
NE13NE15
G23
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NE16NE5E3SE4E5SE3SE3E3
2 days agoN11
G16
NE10N11
G15
NE12NE13
G18
NE16
G19
N13
G18
NE13NE16
G20
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G25
N15
G23
NE17
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N15
G21
N19
G23
NE18
G23
NE17
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N16
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NE16
G24
NE17
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NE15
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G23
NE15
G21
NE14
G19

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.