Monday, May10, 2021
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Marine Weather and Tides
Winthrop, WA

Version 3.4
NOTICE
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 5:28AMSunset 8:26PM Monday May 10, 2021 3:06 PM PDT (22:06 UTC) Moonrise 4:17AMMoonset 6:32PM Illumination 1% Phase: New Moon; Moon at 29 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 102154 AFDOTX

Area Forecast Discussion National Weather Service Spokane WA 254 PM PDT Mon May 10 2021

SYNOPSIS. A gradual warming trend is expected this week with high temperatures climbing well into the 70s and low 80s by Thursday. Above average temperatures have the potential to linger into the weekend. The majority of the Inland Northwest won't get any rain this week, but a few weak disturbances will produce some hit and miss showers mainly over the mountains Tuesday and Wednesday as well as Friday into the weekend.

DISCUSSION.

Tonight: Scattered showers over the Idaho Panhandle and extreme eastern Washington will dissipate early this evening with the loss of afternoon warming. Most places that experience rain with this hit and miss showers probably won't get enough precipitation to wet the streets. With dewpoints in the low to mid 30s, a good deal of the precipitation detected by radar is evaporating before hitting the ground. Overnight lows will be comparable to last night with 40s across the majority of the Inland Northwest with some of our cooler valley locations dipping into the 30s.

Tuesday and Wednesday: More widely scattered light rain showers are expected Tuesday afternoon over the mountainous terrain along the Idaho/Montana border. A few of these showers may clip Bonners Ferry, Priest Lake, and Sandpoint, but they are not expected to be big rain makers. Western Montana will have a better shot of receiving beneficial rains under the weak upper trough descending down the Continental Divide. Another weak disturbance will take a west to east track through southern British Columbia on Wednesday. The majority of the shower activity will be north of the Canadian border Wednesday afternoon and evening, but some scattered light showers will be possible across the high terrain from the Methow Valley toward Republic to Metaline to Bonners Ferry. Neither Tuesday's or Wednesday's disturbance look to be wind makers. On Wednesday afternoon, a shift from south wind to west winds is expected in central Washington with a weak push through the Cascade gaps. Places like Wenatchee, Vantage, and Entiat will have the potential for early evening gusts to 20 mph, pretty normal stuff for early to mid May. /GKoch

Thursday through Monday: Models continue to struggle with the details for late this week and throughout the weekend. Loose agreement and trending toward the ensemble means, a flat ridge of high pressure will be over the region Thursday. Several ensemble members suggest another weak ripple coming across the ridge which could kick up a few mountain showers across northern Washington and North Idaho. Previous runs indicated quite a bit of dry air behind Wednesday's shortwave passage but 18z runs are backing off so just another example of how the details are likely to change with time and best to trend forecasts toward the ensemble means at this times to avoid a lot of flip-flopping. At this point, looks like Thursday will deliver another dry day for most of the Inland NW with temperatures warming into the 70s.

By Friday into Saturday, heights begin to build over the Eastern Pacific allowing a trough to carve into the Western US/Western Canada. The trough looks to split into two branches, one in BC and second tracking into N California. This leaves the Inland NW possibly void of the midlevel shortwave energy. So while a trough axis passes through, this could result in little in the way of showers, cooling, and winds. Again, if you are looking at the deterministic models, they have changed their tune quite a bit from the 00Z to 18Z runs so forecast is leaning heavily toward a National Blend of Models until we see more run to run consistency. Per the latest Blend, the best chance for showers will be over the mountains of NE WA and N ID and Friday and Saturday with a lesser threat for Sunday. Temperatures will remain in the 60s and 70s through the weekend. We do not expect any significant wind events but some breeziness will be possible mainly as the trough passes through.

Model uncertainty carries over into early next week. About 60% of a 100 member ensemble comprised of the GFS/EC/Canadian suggest a deeper trough drops in from the Gulf of AK bringing below normal temperatures and widely scattered showers. The other 40% of the members keep a flat ridge over the Northwest and dry, mild weather. The cooler and wetter solutions are heavily weighted toward the EC ensembles with nearly half of the Canadian members on board and very little support from the GFS. Needless to say, there are a range of possibilities for next week's weather and at this point, it does not look like any big rain makers are in the future to help with our unusually dry Spring. /sb

AVIATION. 18Z TAFS: Widely scattered light showers will develop over the mountainous terrain of north Idaho and northeast Washington this afternoon. Most of these showers will be tied to the terrain, but a few may clip Bonners Ferry, Sandpoint, Kellogg, and possibly Coeur d'Alene. At this time, lightning is not anticipated due to marginal instability and relatively low updraft heights expected. Look for the showers to dissipate by sunset with mainly clear skies and light winds through the overnight into Tuesday morning. /GKoch

PRELIMINARY POINT TEMPS/POPS. Spokane 41 71 44 74 46 76 / 0 0 0 0 0 0 Coeur d'Alene 40 68 42 72 45 75 / 10 0 0 0 0 0 Pullman 39 68 44 72 46 74 / 10 0 0 0 0 0 Lewiston 44 75 47 80 51 82 / 10 0 0 0 0 0 Colville 39 73 41 75 42 78 / 10 0 0 10 10 0 Sandpoint 39 67 41 69 43 73 / 10 10 10 0 10 10 Kellogg 42 64 45 69 48 71 / 30 10 10 0 10 0 Moses Lake 42 77 48 81 48 82 / 0 0 0 0 0 0 Wenatchee 45 75 52 79 51 79 / 0 0 0 0 0 0 Omak 44 76 47 76 46 80 / 0 0 0 10 10 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
Omak Airport, WA35 mi4.2 hrsS 410.00 miFair63°F34°F34%1021.4 hPa

Link to 5 minute data for KOMK

Wind History from OMK (wind in knots)
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Last 24hrN12
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N155
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NW8N5NW6NW6W8CalmN7W9NW5N6N5NW4CalmN5N8N5NE6S4
1 day agoCalmCalmN6W6W4CalmN4N6N6NW9NW4NW7NW8W8W9W8NW11NW10NW8N7N11N10N11N13
G21
2 days agoNE14
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NE15NE6SW6SE8S6SE10E6NW13NW9NW9W5NW5CalmW4CalmW3W5CalmSW3S34CalmCalm

Tide / Current Tables for
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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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