Monday, March25, 2019 L-36.com


Marine Weather and Tides
Sandpoint, ID

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 6:38AMSunset 7:08PM Monday March 25, 2019 2:53 AM PDT (09:53 UTC) Moonrise 12:00AMMoonset 9:29AM Illumination 80% Phase: Waning Gibbous; Moon at 19 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 250950
afdotx
area forecast discussion
national weather service spokane wa
250 am pdt Mon mar 25 2019

Synopsis
Dry conditions are expected today for much of the inland
northwest but another storm system will bring showers into the
region tonight. Winds will be breezy at times overnight and into
Tuesday. The active weather pattern continues with yet another
system bringing rain and high mountain snow Wednesday night and
Thursday. Thereafter we will see spring like temperatures and
mainly mountain showers through next weekend.

Discussion
Today through Tuesday: for this morning... We continue to monitor the
remnants of Sunday's wave drifting very slowly to the northeast.

As of 2am... Light scattered showers continued to fall along and
north of hwy 20 over NRN wa id. Hourly precipitation rates have
varied between a trace and few hundredths. This wave will continue
to slowly move north out of the area this morning and dry
conditions will briefly settled into the region under a mix of sun
and clouds.

The attention will then shift to the next shortwave pivoting toward
the coast from area of low pressure centered around 43n 140w.

Easterly winds are starting to increase and will continue to
remain breezy into this afternoon as they become drawn toward
pressure falls nearing the coast. This will bring a decent shot
for some clearing over the idaho panhandle and eastern third of wa
and chance to warm into the upper 50s to lower 60s. This flow
pattern will continue to bank moisture into the cascades with a
higher probability for clouds to hold firm... Thus cooler
temperatures.

The incoming system will feature a compact surface low at or above
1010mb driven by a 80-90kt jet. The low will take a rough track
from mt hood to moses lake to omak-republic between 00-09z Monday
night or 5pm-2am. This does not look like a very wet system given
its speed and accompanying dry slot punching in on its eastern
flank but will bring the potential for gusty winds and we will
discuss that a little later. As for precipitation, between
0.25-0.50" will be possible along the cascade crest, otherwise
less than a 0.25" is expected with a majority of the columbia
basin likely to pick up less than a tenth of an inch. Snow levels
will start off near 5000 feet in the cascades when the heaviest
precipitation is expected then come crashing down toward 3000 feet
by early Tuesday morning as precipitation becomes more showery.

As such, impacts at the passes should be minimal but worth
watching. Snow levels will be even higher in idaho, running around
5500 feet or so with the onset of the precipitation. A cold front
sweeps through early Tuesday morning and the main threat for
showers will retreat into the northern mountains and idaho
panhandle. Strong midlevel drying should shut off showers in the
idaho panhandle quite early Tuesday afternoon but this drying will
not extend into the N cascades and okanogan highlands where 500mb
temperatures will be cooling near -30c. Consequently,
deterministic models are showing a few hundred joules of afternoon
surface based cape. While the threat is very low due to a
marginal temperature profile for charge separation... It is not out
of the question for a stray lightning strike or two near the
canadian border in the afternoon.

As for winds... Look for breezy easterly winds today as the surface
low approaches. Once the low tracks into the western columbia
basin and northern mountains, the trailing cold front will bring
the potential for a burst of south southwest winds around midnight
and into Tuesday morning. The strongest winds will impact the
central and eastern columbia basin including the foothills of the
blues, palouse, and west plains as well as exposed mountain ridge
tops. Sustained winds of 10 to 20 mph will be possible with gusts
of 20-30 mph. Locally, these could be stronger on exposed benches
over southeastern wa. Winds will remain breezy into Tuesday
afternoon with gusts around 20-25 mph but gradients will be
relaxing throughout the afternoon. Sb
Tuesday night and Wednesday: the cold front will exit to the
southeast. The region will temporarily dry out. The winds will
shift from the southwest to the northeast by Wednesday as the next
wave approaches the area. Wednesday we will see increasing clouds
through the day with valley temperatures in the 50s as the chance
of precip will increase across SE wa and the southern id
panhandle late in the day.

Wednesday night through Friday: the next wave will move through
advecting from the parent low sitting off the oregon coast.

Models are in pretty good agreement of a surface low moving north
into the columbia basin overnight Wed night into Thursday morning.

The models also agree that the low will weaken and eventually
dissolve move out of the area by Friday. What the models disagree
on is how far north to take the precipitation. The canadian barely
brings it up to spokane while the GFS and ec take it up towards
the canadian border. It looks like the models overall have been
trending further north with the precipitation over the last
several runs. So will put at least a chance up to the border, but
will put higher pops from spokane to pullman and the
central southern id panhandle. The pressure gradient will tighten
as well bringing gusts 15-25 mph through Wed night into thur
morning. While the best chance of precip will be Thursday, valley
rain and mountain snow will still be possible through Friday for
parts of southeastern wa and the central southern id panhandle.

Friday night through Saturday: the low weakens off the oregon
coast and moves into the pac NW as an open wave Saturday. There
could be some mountain showers Sat aftn, otherwise a dry forecast
expected. Temperatures will be around average, or lows in the 30s
and highs in the 50s.

Sunday and Monday: models disagree on the weather pattern, but it
looks to remain unsettled and have mention of precip. High temps
will remain in the 50s with lows in the 30s. Nisbet

Aviation
06z tafs: the boundary layer has moistened considerably compared
to 24 hours ago with areas of MVFR stratus most prevalent near and
north of i-90 as of 05z this evening. Overnight into Monday
morning boundary layer winds shift to the east- southeast ahead of
an approaching system pooling the greatest bl moisture into the
cascades including keat as well as the northern valleys. Meanwhile
some drying in the bl should bring rising CIGS to
kgeg ksff kcoe kpuw klws with mainlyVFR conditions expected
through 06z Tuesday. Jw

Preliminary point temps pops
Spokane 59 38 54 31 58 36 0 20 10 0 10 50
coeur d'alene 59 37 53 29 56 35 0 30 10 0 10 40
pullman 57 36 51 31 54 34 0 40 20 0 20 60
lewiston 62 43 57 39 57 41 0 50 20 10 20 60
colville 62 35 59 26 61 31 10 40 30 0 10 30
sandpoint 56 36 53 31 54 34 0 50 30 0 10 30
kellogg 58 37 52 31 53 36 0 50 20 0 20 50
moses lake 58 36 60 33 59 38 0 40 0 0 10 60
wenatchee 53 36 60 33 52 37 20 60 10 0 10 60
omak 56 37 56 30 54 36 10 60 20 0 10 40

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 mi59 minN 010.00 miOvercast39°F37°F93%1023.4 hPa

Wind History from SZT (wind in knots)
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Last 24hrCalmW3CalmCalmCalmCalmCalmE8E8E7E6E4SW7SW9
G15
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G15
SW7S8S7S5S4SW3SW3CalmCalm
1 day agoCalmCalmCalmCalmCalmCalmCalmCalmS8S10S9S8SE7S7SW5SW4CalmCalmCalmCalmCalmCalmCalmCalm
2 days agoCalmCalmCalmCalmCalmCalmCalmCalmSE3E6CalmE3S11
G15
SW6S6SW6SW6SW6S6CalmCalmCalmCalmCalm

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 (5,6,7,8)
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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.