Saturday, October16, 2021
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Marine Weather and Tides
Heron, MT

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 7:06AMSunset 5:58PM Saturday October 16, 2021 2:22 AM PDT (09:22 UTC) Moonrise 4:56PMMoonset 2:24AM Illumination 77% Phase: Waxing Gibbous; Moon at 10 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 160918 AFDOTX

Area Forecast Discussion National Weather Service Spokane WA 218 AM PDT Sat Oct 16 2021

SYNOPSIS. Expect warm conditions through the weekend. A cold front will bring some light rain Sunday for the Cascades and Sunday night into Monday for portions of southeast Washington and the southern Idaho Panhandle.

DISCUSSION. Today: Light precip is moving across northeast WA and the north ID Panhandle this morning, as well as right along the crest of the Cascades. As the trough moves down the coast this morning it will push the precip north of the border. Precip today will be mostly confined to the northern Cascades. Temperatures warm today under southwesterly flow and mostly sunny skies. 3 to 13 degrees of warming is expected, which tops us out in the 60s . with even some low to mid 70s for the Snake river valley/LC area. Gusts 10 to 15 mph is possible at times this afternoon with slightly stronger gusts up the Okanogan Valley.

Tonight through Monday: The trough will dig down the coast and push inland across northern CA Sunday afternoon. The widespread light precip for Sunday night into Monday has drastically changed. With this digging of the trough, it takes most of the energy and precipitation into Oregon. We will see a chance of rain Sunday in the Cascades with rain potentially moving into southeast WA and the central and southern ID Panhandle Sunday night into Monday morning. Current thinking is precip won't extend much further north and Spokane/Coeur d'Alene area. Any precip that does fall would be light, generally under a tenth of an inch. Parts of the northern Columbia Basin, up into NE WA and the north ID Panhandle may see no precip with this event. Temps Sunday will be similar to Saturday. Then the cold front moves through and temps for Monday lower. Locations that don't see precip will have temps lower a couple of degrees, but where precip falls, temps will lower anywhere from 6-12 degrees. As the low moves into northern Utah on Monday our chance of precip will decrease through the day. /Nisbet

Tuesday through Saturday: The departing upper-level low will track through the southern Rocky Mountains while we remain under weak southwest flow and a benign deformation zone set up late Monday into Tuesday. This change in the track of the Low from a more northern track (through Washington/northern Idaho) a few days ago shifted farther south.

The upper level pattern looks to keep a deep trough off the Pacific Coast while a ridge of high pressure stretches north of Alberta/Saskatchewan through late week. This will favor a southwest flow pattern for the Pacific/Inland northwest and a rather warm and dry pattern through the workweek. Daytime temperatures should continue the trend of reaching near seasonal normal highs (upper 50s/low 60s) with overnight lows near normal as well (upper 30s/low 40s).

Deterministic and ensemble guidance begin to fall out of step with one another Wednesday/Thursday (and beyond) with regard to the ejecting shortwave that may swing north along the CA/OR/WA coast. The atmospheric river guidance would suggest that this moisture plume rides the Pacific coast and remains mostly parallel to the coast, struggling to move beyond the Cascade mountain range. Model guidance is advertising some light precipitation amounts making it into eastern WA/northern ID so have kept the very light PoP mentions to parts of the Basin and the higher chances in the Cascades. Through late week confidence becomes much lower in exact details of the forecast, but perhaps better chances for a showery/cooler pattern late week into next weekend. /Dewey

AVIATION. 06Z TAFS: High pressure builds in later tonight into Saturday. Clouds decrease and lift tonight, with the main shower chances moving to the NE WA/north ID mountains. Some patchy fog is possible in the sheltered mountain valleys north of KGEG-KCOE. So overall VFR conditions. /Cote'

PRELIMINARY POINT TEMPS/POPS. Spokane 68 41 66 38 59 35 / 0 0 0 20 20 0 Coeur d'Alene 66 39 65 38 57 35 / 0 0 0 20 20 0 Pullman 68 39 66 35 51 30 / 0 0 0 30 40 0 Lewiston 75 45 72 46 58 40 / 0 0 0 30 50 10 Colville 63 33 64 32 63 30 / 0 0 10 10 0 0 Sandpoint 60 35 62 35 58 33 / 0 0 0 10 10 0 Kellogg 66 43 67 41 55 38 / 0 0 0 20 20 10 Moses Lake 66 36 64 37 61 33 / 0 0 10 10 10 0 Wenatchee 64 45 63 43 61 40 / 0 0 10 10 0 0 Omak 65 41 64 39 64 37 / 0 0 10 10 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 mi27 minN 0 miOvercast41°F41°F100%1021.7 hPa

Link to 5 minute data for KSZT

Wind History from SZT (wind in knots)
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Last 24hr0S4S4S4S3SW3S3SW3SW4SW40W4SW300000000000
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Tide / Current Tables for
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Weather Map
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GEOS Local Image of PacificNorthwest    EDIT
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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