Friday, July10, 2020
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Marine Weather and Tides
Winthrop, WA

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 5:14AMSunset 8:59PM Friday July 10, 2020 4:42 AM PDT (11:42 UTC) Moonrise 11:15PMMoonset 9:59AM Illumination 75% Phase: Waning Gibbous; Moon at 20 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 Winthrop, WA
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location: 48.47, -120.18     debug


Area Discussion for - Spokane, WA
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FXUS66 KOTX 101127 AFDOTX

Area Forecast Discussion National Weather Service Spokane WA 427 AM PDT Fri Jul 10 2020

SYNOPSIS. Dry conditions are expected Friday and Saturday. Temperatures will warm, with Saturday looking to be the warmest day of the week. A cold front will bring breezy winds late Saturday and throughout Sunday. Temperatures on Sunday will be almost 15 degrees cooler. Temps slowly warm throughout next week, but will remain below average for this time of the year.

DISCUSSION. Today through Sunday night: A cold front continues to pass through the Idaho Panhandle early this morning. Bands of showers and embedded thunderstorms have produced rainfall amounts between a few hundreths to a quarter inch. Most of this fell over the last 6-8 hours south and east of a line from Kellogg to Pullman. We are also observing a few light showers developing over North Idaho this morning around Sandpoint and Porthill. This activity is forming behind the main front but within a pool of midlevel instability under 500mb temperatures of -16C. There is good agreement amongst the weather models that the front will shift east into Western Montana by sunrise and precipitation chances will end across the Inland NW.

Dry air working into the region and building heights ahead of the next low dropping in from the Gulf of AK will promote a warming and drying trend. Temperatures this afternoon will warm into the upper 70s to mid 80s, just a degree or two shy of normal. On Saturday, the heat over the Desert Southwest continues to nudge northward pushing temperatures up another 10 degrees into the upper 80s to mid 90s. Will this be Spokane's first 90F day? The National Blend of Models gives it about a 20% chance; the spread between its members only vary a mere two degrees from 88-90F.

The main impacts from this warmth will be increased fire danger in our fine fuels across the Columbia Basin and East Slopes of the WA Cascades. Two days of low humidity levels and temperatures in the 80s and 90s will continue to cure area fuels. A light southwest wind is expected today (FRI) with speeds generally in the 8-13 mph range. On Saturday, the next cold front approaches the WA Coast. Southerly winds pickup Saturday afternoon ahead of the front, especially within the Okanogan Valley and portions of the Western Columbia Basin. Speeds of 10-20 mph will be common. A sharp increase in westerly winds will accompany the front late afternoon and evening for our Cascade Gaps and Western Columbia Basin. Wind speeds of 15-25 mph will be possible with locally stronger gusts. This raises concern for spreading fires as humidity levels dip between 15-20% and temperatures hover around 90F.

The front will bring little to no precipitation to Central WA but could gather some moisture and potential for a few showers as it crosses through the eastern third of WA and North Idaho Sunday night. Gusty winds will also spread into areas of the Palouse, Spokane Area, and Idaho Panhandle but speeds will be more manageable given the overnight timing. A 8-9mb pressure gradient residing across the Inland NW on Sunday will mean another breezy day is in store. Strongest winds will be found in the lee of the Cascades and across the Columbia Basin where gusts of 25-30 mph are expected. Temperatures will cool back into the 70s to lower 80s, nearly a 15 degree drop from Saturday. Despite the cooling, dry air moving into the region Sunday will continue to bring our humidity levels near 30% or lower leading to some concern for spreading fires in dry grasses. /sb

Monday through Friday: The Pacific Northwest will continue to be unable to build a strong summertime ridge into the region. We will remain in a west to northwest flow aloft as a series of waves or troughs move into the region from the northwest. Monday and Tuesday will be dry. Wednesday onward there looks to be some instability across northern WA and ID for a chance of afternoon and evening showers. Cannot rule out a lightning strike along the Canadian border, but right now it looks quite isolated. Temperatures Monday will be 5-9 degrees below average. That equates to mid 70s for much of eastern WA and north ID, and in the lower 80s for central WA. Temperatures will slowly warm through the week, and by Friday we will only be about 2-4 degrees below average. Winds will generally be light, but Wednesday there could be some breezy winds across the typical Cascade gaps into the Columbia Basin and Spokane area. /Nisbet

AVIATION. 12Z TAFS: The cold front has cleared east of the Idaho Panhandle but a few light showers with cigs around 6k ft AGL will remain around Sandpoint and Bonners Ferry through 14z. Drier air will work into the region today providing VFR skies through the TAF period. Winds will be light but occassional gusts to 15 mph will be possible 20-02z. /sb

PRELIMINARY POINT TEMPS/POPS. Spokane 79 54 89 54 76 48 / 0 0 0 0 10 0 Coeur d'Alene 77 52 87 55 74 47 / 0 0 0 10 10 10 Pullman 76 53 87 52 73 46 / 0 0 0 10 10 0 Lewiston 83 60 94 61 81 56 / 0 0 0 10 0 0 Colville 80 49 88 52 78 46 / 0 0 0 10 20 10 Sandpoint 76 51 85 55 73 46 / 10 0 0 10 20 20 Kellogg 73 54 86 55 71 50 / 10 0 0 20 10 10 Moses Lake 86 56 94 58 82 52 / 0 0 0 0 0 0 Wenatchee 85 59 91 58 79 55 / 0 0 0 10 0 0 Omak 84 57 91 55 80 52 / 0 0 0 10 10 0

OTX WATCHES/WARNINGS/ADVISORIES. ID . None. WA . Fire Weather Watch from Saturday afternoon through Saturday evening for East Washington Central Cascade Valleys (Zone 677)-East Washington Northern Columbia Basin (Zone 673)- East Washington South Central Cascade Valleys (Zone 676).




Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Omak Airport, WA35 mi2.8 hrsNW 1010.00 miFair60°F46°F62%1014.4 hPa

Link to 5 minute data for KOMK

Wind History from OMK (wind in knots)
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Last 24hrNW6W6CalmN3CalmN5CalmCalmCalmSW64N9N12N11N15N14N9N11NW6NW6NW8NW10N9NW5
1 day agoN5CalmCalmE3N6NW64N5456S6SW8SW6SE14S14SE8SW6S9W4SE6W6NW4NW6
2 days agoNW8N12N15N15N15
G22
N10N8NW8CalmE33N20
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N18N16N13N8N8NW6N8W7NW8NW9NW7

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
Wind Forecast for Spokane, WA (7,2,3,4)
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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 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.