Friday, September25, 2020
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Marine Weather and Tides
Troy, MT

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:37AMSunset 6:39PM Friday September 25, 2020 7:04 AM PDT (14:04 UTC) Moonrise 4:17PMMoonset 12:00AM Illumination 59% Phase: Waxing Gibbous; Moon at 8 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 Troy, MT
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location: 48.36, -116     debug


Area Discussion for - Spokane, WA
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FXUS66 KOTX 251136 AFDOTX

Area Forecast Discussion National Weather Service Spokane WA 436 AM PDT Fri Sep 25 2020

SYNOPSIS. Another round of rain will spread across the Inland Northwest today. It will be windy this afternoon as well with gusts out of the west up to 40 mph across the Columbia Basin, Palouse, and West Plains. Breezy and showery conditions will linger into Saturday followed by a warming and drying trend next week.

DISCUSSION. Today and tonight: Satellite shows a moist frontal boundary moving into NW Washington early this morning which will cross the Cascades by mid-morning.

Rain: Models show widespread rain developing over the area by late morning especially along and north of I-90 where isentropic ascent will provide added lift for precipitation. Behind the front a moist and unstable regime will lead to additional convective showers for the afternoon and evening with the strong westerly flow especially favoring the Cascades and Idaho Panhandle. Most locations should receive between 0.10-0.25 inches except 0.25-0.50 inches in the ID Panhandle. Locally higher amounts will be round near the Cascade crest, and under convective showers. Instability looks marginal for thunderstorms and thus have continued to leave this out of the forecast.

Wind: Models continue to show 850mb winds of 30-40 kts this afternoon with afternoon sun breaks allowing some of this to mix down to the surface across the Waterville Plateau, Columbia Basin, West Plains, and Palouse. Localized wind gusts near advisory levels of 45 MPH may surface, but given brief duration and coverage of advisory level gusts opted to not issue any wind advisories at this time.

Drier air moves in overnight with shower chances becoming confined to the Cascade crest and ID Panhandle. The drier air will lead to colder lows, with frost possible for the Republic area.

Saturday and Saturday night: A short wave drops down in northwest flow resulting in another round of rain showers, mainly for the Cascades, northern mountains, and ID Panhandle but some could sneak into the Spokane area and Palouse as well. A 130-140 kt upper jet over the region along with a well mixed atmosphere and 850mb winds of 20-30 kts will promote another round of breezy winds across the region. This wave exits Saturday evening with drier air once again moving in overnight. JW

Sunday and Monday: The forecast for SUN has trended drier. The majority of the models have moved showers out of the northern and central Idaho Panhandle during the early morning hours. By sunrise on SUN, a sharp high pressure ridge is expected to build off the WA coast with dry mid/upper level flow across north ID and eastern WA. As showers and clouds exit the region, look for chilly morning temperatures. Readings in the 30s should be common in the valleys across northeast WA and north ID. Residual low level moisture may result in some fog, but sheltered valleys that clear will have the potential for some frost Sunday morning including Colville, Cusick, Priest Lake, Deer Park, and Davenport. Temperatures on Sunday will remain below average with afternoon highs in the 60s for the majority of the Inland Northwest. Clear skies and light winds will promote another night of efficient radiational cooling Sunday night. Frost will be possible again Monday morning in the valleys of the Idaho Panhandle as well as cool pockets across eastern Washington.

Tuesday through Friday: Temperatures will trend warmer Tuesday through the end of the week and beyond as a high amplitude upper level ridge sets up over the Western US. Look for large diurnal temperature swings with a dry air mass in place, mainly clear skies, and light winds. Some sheltered valley locations that are notoriously chilly like Republic, Deer Park and Priest Lake may experience 40 degree diurnal swings Tuesday through Friday with lows in the 30s and highs in the 70s. It is a good thing that Washington and Idaho got rid of wildfire smoke because next week will become increasingly stable under a very strong ridge. Morning inversions will be slow to break with light transport winds. Fortunately, we will be heading into next week with a relatively clean "air shed" and can look forward to pleasant conditions with a trend toward above average temperatures beginning Tuesday. /GKoch

AVIATION. 12Z TAFS: Next round of rain will move in this morning turning to showers in the afternoon. CIGS are expected to become MVFR over NE Washington into the Idaho Panhandle including Spokane area TAF sites. Winds will increase as well today with W-SW winds gusting to 25-35 kts over much of the region. Mountains will be obscured throughout the day. Showers will decrease after sunset along with decreasing winds and clearing. Exception is the ID Panhandle and the palouse where upslope stratus may bring occasional MVFR conditions overnight, including KPUW. JW

PRELIMINARY POINT TEMPS/POPS. Spokane 59 41 61 39 63 36 / 100 50 20 20 0 0 Coeur d'Alene 57 43 60 40 62 40 / 100 70 40 30 0 0 Pullman 59 43 61 39 61 36 / 90 60 30 30 0 0 Lewiston 65 50 67 48 66 45 / 80 50 20 30 0 0 Colville 60 36 66 34 67 35 / 100 40 40 10 0 0 Sandpoint 54 40 59 38 60 37 / 100 80 50 40 0 0 Kellogg 55 45 57 42 60 45 / 100 100 60 40 0 0 Moses Lake 68 43 68 42 68 35 / 80 20 10 0 0 0 Wenatchee 66 46 67 45 67 42 / 90 20 20 10 0 0 Omak 63 40 66 41 68 43 / 90 20 20 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
Boundary County Airport, ID30 mi74 minN 010.00 miPartly Cloudy48°F41°F76%1011.5 hPa

Link to 5 minute data for K65S

Wind History from 65S (wind in knots)
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Last 24hrS3S5S5S7
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SW4S5CalmS7SW4SW3S5CalmCalmS6CalmS3Calm
1 day agoCalmCalmSE4S3SE3CalmSW8SW5S7CalmS5CalmCalmN4NW7NW8N6CalmSE5S3S4S6SW5S8
2 days agoCalmCalmCalmCalmCalmCalmS3SW4S5S6CalmCalmS3CalmCalmE4SE3CalmCalmS4CalmSE5SE3SE4

Tide / Current Tables for
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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: 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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Ground Weather Radar Station Spokane, WA
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