Thursday, April9, 2020
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Marine Weather and Tides
Athol, ID

Version 3.4
NOTICE
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 6:06AMSunset 7:30PM Thursday April 9, 2020 4:19 PM PDT (23:19 UTC) Moonrise 9:54PMMoonset 7:21AM Illumination 96% Phase: Waning Gibbous; Moon at 17 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 Athol city, ID
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location: 47.98, -116.56     debug


Area Discussion for - Spokane, WA
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FXUS66 KOTX 092205 AFDOTX

Area Forecast Discussion National Weather Service Spokane WA 305 PM PDT Thu Apr 9 2020

SYNOPSIS. Friday will be dry and warm with an abundance of sunshine. An abrupt change in our weather will arrive on Saturday with the arrival of a strong cold front. North winds gusting to 50 mph or more will channel down the Okanogan Valley into central Washington on Saturday. Temperatures will remain cooler than average on Sunday followed by a warming trend next week.

DISCUSSION.

. NORTH WINDS GUSTING TO 50 MPH OR MORE DOWN THE OKANOGAN VALLEY ON SATURDAY .

Tonight and Friday: The weather tonight into Friday morning will remain dry and mild. Low temperatures tonight should remain in the 40s for many lowland areas of central Washington. Some spots around Spokane and Coeur d'Alene may remain above 40 degrees tonight under mostly clear skies with light winds . a pretty mild night this early in the season. We will see winds increase Friday as our high pressure ridge weakens ahead of Saturday's cold front. Look for west or northwest winds of 10 to 20 mph Friday afternoon across the Columbia Basin, Palouse, and West Plains. Increased mixing will likely push afternoon temperatures close to 70 degrees in Spokane (our warmest day of the spring so far).

Saturday: Confidence continues to grow that a strong cold front will squeeze chilly air through the Okanogan Valley on Saturday. Raw model data often struggles to capture the strength of north winds through the Okanogan Valley. Pattern recognition (looking back at past events) and MOS guidance often prove to be the most valuable inputs for these north wind cases. MOS guidance from the NAM and GFS advertise winds at Omak between 30-35kts late in the morning into the mid afternoon. Gusts of 50 mph or more have occurred in past events in Oroville, Omak, and exposed portions of the Waterville Plateau for past events.

*Wind Impacts: The Okanogan Valley and parts of the Waterville Plateau exposed to north winds will likely experience the brunt of the strong winds on Saturday. Gusts of 50 mph or more are capable of tree damage, power outages, and treacherous cross winds for high profile vehicles (Hwy 2 Waterville Plateau). Sustained winds in the 20 to 25 mph range with gusts of 40 mph look like a good bet for Moses Lake, Ephrata, Othello, and the benches around Wenatchee. Winds out of the northeast may also gust between 35-40mph around Bonners Ferry, Sandpoint, Rathdrum and Post Falls as winds channel down the Highway 95 corridor of far north Idaho.

*Blowing Dust: Very little precipitation has fallen in central and north central Washington in recent weeks. No rain is expected in central Washington between now and Saturday. Field preparation has begun for spring vegetable/potato planting around Ephrata, Moses Lake, and Othello. Some of these fields will be susceptible to producing blowing dust on Saturday.

*Grass Fire Concerns: Warm and dry weather prior to the arrival of Saturday's front also has raised concerns for grass fires. There is new green growth across the Inland Northwest, but there is also a good deal of old dry grasses carried over from last year. Relative humidity is expected to plunge into the 15 to 25 percent range across much of central and eastern Washington on Saturday. Please check for local burn bans prior to burning Friday through the weekend.

*Idaho Panhandle Snow: Saturday's front does not look like a big precipitation producer. The very dry Canadian air along and behind the front won't bring much deep layer moisture with it. A burst of snow is expected with the front mainly in the morning for the northern and central Idaho Panhandle. At this time it looks like Lookout Pass will have a shot of 1 to 3 inches of quick accumulation Saturday morning. The southern Idaho Panhandle mountains will have a better shot of more snow through the afternoon as convective snow showers produce snow/graupel showers into the late afternoon. There may even be a few lightning strikes across the Camas Prairie Saturday with these convective squalls. /GKoch

Sunday through Thursday: A strengthening ridge off the coast will help steer dry, cool northwest flow into the region behind the cold front on Saturday. Models are still indicating cooler than normal temperatures across the region by around 10 degrees for this time of year. For the beginning of next week, the ridge will slowly slide east and bring warming trend to the region as highs are expected to rebound back into the 60s and low 70s for most. The models are expected in mostly precip free start of the week. The best chance for any precip is early Wednesday as a wave moves down the backside of the ridge and clips the Idaho Panhandle and extreme Eastern Washington. It could bring some minimal impacts to the higher terrain of the Panhandle. /JDC

AVIATION. 18Z TAFS: Our updated TAFs continue to forecast VFR conditions for the Inland Northwest as our region is expected to remain under the influence of high pressure. A bit of an increase in mid and high clouds is expected Friday morning, evidence that the high pressure ridge will begin to weaken. Our 00z TAFs will feature an increase in winds ahead of a cold front scheduled to arrive on Saturday. /GKoch

PRELIMINARY POINT TEMPS/POPS. Spokane 40 69 39 50 28 51 / 0 0 10 30 0 0 Coeur d'Alene 39 66 39 46 27 49 / 0 0 20 40 0 0 Pullman 38 65 39 51 27 49 / 0 0 10 40 0 0 Lewiston 44 72 47 57 32 54 / 0 0 10 40 10 0 Colville 36 70 39 53 27 56 / 0 0 20 30 0 0 Sandpoint 33 64 36 44 27 47 / 0 10 30 70 10 10 Kellogg 36 61 36 43 25 44 / 0 10 40 70 10 10 Moses Lake 40 75 44 61 30 61 / 0 0 0 0 0 0 Wenatchee 46 73 45 59 33 61 / 0 0 0 10 0 0 Omak 43 70 43 55 31 59 / 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
Coeur d'Alene Airport - Pappy Boyington Field, ID20 mi24 minW 910.00 miFair67°F28°F24%1018.1 hPa
Sandpoint, Sandpoint Airport, ID22 mi25 minE 610.00 miFair63°F28°F27%1015.6 hPa

Link to 5 minute data for KCOE

Wind History from COE (wind in knots)
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Last 24hrSW10
G15
W8SW4W4SE7SE3NE3E3E4E3NE4SE5E3E3E4NE6NE8NE6Calm4S6SW7W6W9
1 day agoSW9SW9SW9SW6S8S5S8S7NE3CalmNE5E4CalmNE4NE4CalmE3CalmCalmNW4SW5Calm6SW8
2 days agoW12SW9SW8S9S7SE9S8CalmS8CalmSE3SE3CalmS4SW6S6SW6S7SW74W8
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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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Spokane, WA (19,4,5,8)
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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 numerous 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.