Sunday, September23, 2018

Marine Weather and Tides
Heron, MT

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9/17/2018 XTide broke when 1and1 "upgraded" my server. It has been esculated. I am sorry for the problem.

Sunrise 6:35AMSunset 6:42PM Sunday September 23, 2018 6:22 PM PDT (01:22 UTC) Moonrise 6:32PMMoonset 4:46AM Illumination 99% Phase: Waxing Gibbous; Moon at 14 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 Heron, MT
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location: 47.98, -116     debug

Area Discussion for - Spokane, WA
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Fxus66 kotx 240031
area forecast discussion
national weather service spokane wa
531 pm pdt Sun sep 23 2018

Isolated rain showers will dissipate over northeast washington and
north idaho through tonight, with breezy conditions near the
cascades decreasing later this evening into the overnight. Drier,
warmer weather is expected Monday through Thursday with sunshine.

A cold front Friday will have the potential to bring cooler,
windy and unsettled weather to the region for the weekend.

Tonight through Tuesday: limited shower chances will dissipate
as the inland NW becomes dominated by a drier northwest flow, but
there could be some chilly temperatures by Tuesday morning.

Tonight shower chances will linger over far NE wa and north id,
with one more mid-level shortwave disturbance dropping in from
canada and a lower level deformation axis sliding east-southeast
across the panhandle into montana. With the brunt of the mid-level
wave remaining east of the region, showers should remain light
and isolated to widely scattered in nature. And by the overnight
the main risk is expected to have shifted into montana. Another
weak disturbance passing the id mt border Monday afternoon could
also bring some isolated showers. Otherwise it will be drier with
sun mixed with passing high clouds Monday into Tuesday.

Winds will remain breezy this evening, particularly near the east
slopes of the cascades into area such as the wenatchee area and
waterville plateau. Speeds will dissipate overnight. Additional
breezy conditions are expected Monday, but this go-around the
focus looks to be more down the okanogan valley where a
northerly flow is expected to funnel in. I increased speeds a bit
over the previous forecast here. Then winds generally decrease
region-wide Monday night into Tuesday. Lows Monday night into
Tuesday morning will be chilly in some spots with the aide of the
lighter winds and less cloud cover. There could be some frost with
the higher potential in the sheltered northeast valleys and some
of the outlying areas around southern spokane county into the
higher palouse. This will be monitored and should coverage
increase some highlights may be needed. The forecast also includes
some patchy fog late Monday night to Tuesday morning with the
best threat again in the northeast valleys. Cote'
Tuesday night through Thursday night... Models are in good
agreement and consistent over previous runs in placing the
forecast area under the dry northwesterly flow aloft beneath the
eastern flank of a strong eastern pacific blocking high pressure.

This regime will promote generally clear skies and light winds.

Temperatures will increase by a degree or two each day solidly
into the 70s by Thursday. Overnight lows with clear skies... Light
winds and longer overnight periods will be crisp each morning
especially in protected valleys where patches of frost will occur.

This will be a pleasant and quite autumn work week before
big changes this weekend.

Friday through Sunday... Latest models are coming into better
agreement in depicting the arrival and evolution of a strong
northerly wave dropping out of canada. Beginning on Friday the
northern zones will sense this change with breezy north winds
beginning to feed down the okanogan valley and the potential of a
few showers across the northern tier zones. Locations north of
i-90 will notice a cool down of about 5 degrees or so over
Thursday's highs as this dry and cooler canadian continental air
mass begins to infiltrate the region. Friday night and through
Saturday will be a potentially windy period especially through the
northern gaps but also penetrating the basin where dry conditions
could create a late season fire danger as well as some blowing
dust issues. It will also be significantly cooler with most
locations struggling into the mid 60s for highs. There doesn't
appear to be a lot of moisture with this front... However the
cooler air mass will not need as much moisture to squeeze out a
few valley rain and mountain snow showers as it arrives
Friday night and Saturday morning.

The evolution of this incoming trough is a bit uncertain at
this time... But in general there is loose agreement between models
in stalling the southward progression and then kicking it eastward
through the forecast area Saturday night and Sunday which could
take the characteristic of a typical westerly short wave
passage... Picking up some pacific moisture as it evolves for a
chance of showers mainly over the eastern zones and idaho
panhandle on Sunday. Fugazzi

00z tafs: a shortwave disturbance moving down along the backside
of an upper level trough of lower pressure will produce showers
across the northeast portion of the region this evening. Expect
these showers to be in the vicinity of kgeg, ksff and kcoe through
06z. Mid level clouds will hang around overnight with skies
clearing through the day Monday as higher heights move in. Patchy
fog is also expected to develop across the valleys in northeast wa
and in the northern id panhandle late tonight into early Monday
morning. Svh

Preliminary point temps pops
Spokane 43 67 41 68 45 72 10 0 0 0 0 0
coeur d'alene 43 66 40 67 42 71 10 10 0 0 0 0
pullman 40 64 39 67 39 72 0 0 0 0 0 0
lewiston 45 70 44 74 46 77 0 0 0 0 0 0
colville 42 68 39 71 41 75 10 0 0 0 0 0
sandpoint 38 64 35 65 37 69 20 10 0 0 0 0
kellogg 40 61 39 63 38 68 10 10 0 0 0 0
moses lake 38 73 38 75 40 77 0 0 0 0 0 0
wenatchee 47 72 46 74 50 77 0 0 0 0 0 0
omak 45 73 45 75 47 77 10 0 0 0 0 0

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, ID37 mi47 minN 010.00 miOvercast54°F46°F77%1016.6 hPa

Wind History from SZT (wind in knots)
Last 24hrSW7
1 day agoNE4NE8NE5CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSW4SW3SW8S8SW5
2 days agoN11

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 (21,6,7,8)
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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.