Wednesday, October20, 2021
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Marine Weather and Tides
Clark Fork, ID

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 7:12AMSunset 5:50PM Wednesday October 20, 2021 6:31 AM PDT (13:31 UTC) Moonrise 6:06PMMoonset 7:05AM Illumination 100% Phase: Full Moon; 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 Clark Fork, ID
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location: 48.28, -116     debug


Area Discussion for - Spokane, WA
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FXUS66 KOTX 201231 AFDOTX

Area Forecast Discussion National Weather Service Spokane WA 531 AM PDT Wed Oct 20 2021

SYNOPSIS. An approaching system will bring light rain across the region today with mostly cloudy skies. A wetter pattern is forecast for the Inland Northwest for the end of the week into early next week, with temperatures cooling closer to normal.

DISCUSSION. Satellite and radar imagery early this morning show increasing cloud cover from southwest to northeast and showers that are pushing through the Portland, OR and Cascade Range area. Our anticipated first trough in a series of weather systems will arrive this morning. The mild, dry Fall we've been enjoying for the last week or so will see a change beginning today that will continue through the early part of next week (at least). Our changing weather doesn't look significant or high impact, but definite changes are moving in, so let's talk more about that.

Noted in the plan view of the National Blend of Models (NBM) is the increase in cloud cover beginning today and continuing through early next week. Partly to mostly cloudy skies, if not overcast, will be persistent through the upcoming weekend and into early next week. Temperatures also have a gradual declining trend each day with a smaller range of high to low each day as we move through the extended period. Closing the gap between the seasonal normal high and low (Spokane: 57F and 37F respectively), temperatures look to remain above freezing but will be a bit cooler than seasonal normal for the week ahead. Despite a few instances of CAA associated with frontal passages and troughs pushing through the region through late week and this weekend, temperatures will remain within 5 degrees or so of seasonal normals.

Wednesday (Today): Today's weather system is just one in the mix of a train of weather systems that will move through the Pacific Northwest over the next several days. However, for today's system, the precipitation continues to be on the light side compared with the series. 0.10" across the Basin and the Plains to 0.20" into northern and northeast Washington/northern Idaho is the consensus for precipitation amounts for today. The trough is tilting negatively as it has moved inland and will travel from the south. Losing some of the energy as the trough crosses the Cascades, convergence and a compressing pressure gradient will force some breezy to gusty winds through the Columbia Basin this afternoon (20-25 mph). Some northern valley fog development overnight is likely after light rain moves through the region.

Thursday: A brief break in weather systems and an opportunity for temperatures to warm a few degrees over Wednesday's readings. Although skies do not look to clear much, winds will be lighter.

Friday through Monday: The more active period of the forecast that has been advertised for several days still looks on track. Deciding when one weather system ends and the next one begins has gotten muddied up in the shortwaves moving through, so we'll just take it day by day. The parent upper level low remains off shore of British Columbia/Washington State. The moisture plume takes a better trajectory (IVT guidance) pulling from the southwest which should overcome the Cascade shadow effect and bring better precipitation chances to the Inland Northwest from the southwest. Late Thursday the baroclinic zone at 700mb looks much more organized with frontogenesis and convergence with the front as it crosses the Cascades. The jet will push this frontal feature eastward by Friday morning and the associated band of precipitation should move from west to east through the day Friday. Subtle convergence areas in northern and northeast Washington may produce better amounts of rain. Locally, 0.25 to 0.75 inches of rain looks promising for Friday into early Saturday.

A very brief break in precipitation before the next wave moves in, Saturday. Cloudy skies will continue into the weekend. Sunday into Monday the plume of moisture becomes more oriented into north- central California. However, with our continued southwest flow, we'll still see the clouds streaming through our region up here. The parent trough off-shore digs a bit farther south and the jet becomes stronger along the northwest coast. Surface winds will shift out of the northeast briefly late Sunday with an approaching low pressure system (again) but the winds aloft will begin to increase through early Monday. Another chance for widespread precipitation on Monday. Seeming like a never-ending train car, the onslaught of rain continues!

Compiling all of the ensemble model guidance, total precipitation for parts of eastern Washington through northern Idaho from late Thursday through early Tuesday are advertising over 1 inch of rain and in some places over 1.5 inches of rain. The rainfall looks like it will be mostly stratiform and steady in nature, not a downpouring event. So, impacts look minimal. Although, after a long period without rain some areas could see some ponding of water. We'll keep an eye on recent burn scars but the intensities don't look impressive.

All this talk and the bottom line is the forecast is looking cloudy, rainy, cool but not cold, and very Fall-like for the remainder of the work week, the weekend and into early next week. /Dewey

AVIATION. 12Z TAFS: Light precip is moving in south of MWH and EAT as of 12z. Expecting this to continue spreading north and east through the day. Showers will be light and expecting mid and low clouds to develop with low end VFR or high marginal VFR ceilings at airfields through 00z-02z this evening. Winds will become breezy after 21z when the precipitation becomes more light and spotty. /Dewey

PRELIMINARY POINT TEMPS/POPS. Spokane 58 38 65 46 57 39 / 60 0 0 30 80 40 Coeur d'Alene 56 38 62 45 55 40 / 70 10 0 20 70 50 Pullman 58 37 65 44 56 36 / 80 0 0 30 80 40 Lewiston 65 45 71 53 60 44 / 50 10 0 30 80 40 Colville 57 31 61 38 55 35 / 80 20 0 40 90 50 Sandpoint 53 36 57 39 52 38 / 70 20 0 20 80 70 Kellogg 58 41 63 48 57 41 / 80 10 0 20 70 70 Moses Lake 62 38 65 46 57 38 / 60 0 0 60 70 10 Wenatchee 60 43 62 49 58 42 / 70 0 0 80 60 20 Omak 59 39 62 46 59 40 / 70 10 0 70 70 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
Sandpoint, Sandpoint Airport, ID30 mi56 minNNE 3 miPartly Cloudy46°F34°F62%1010.8 hPa

Link to 5 minute data for KSZT

Wind History from SZT (wind in knots)
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Last 24hrNE8NE10NE12NE9NE11NE14
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1 day ago0000NE8N4NE4N5E3000000000W3W3000NE6
2 days ago0000NE5NE5SE300000000000000000

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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