Friday, August18, 2017 L-36.com


Marine Weather and Tides
Winthrop, WA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:01AMSunset 8:07PM Friday August 18, 2017 9:16 AM PDT (16:16 UTC) Moonrise 1:24AMMoonset 5:05PM Illumination 14% Phase: Waning Crescent; Moon at 26 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 181136
afdotx
area forecast discussion
national weather service spokane wa
436 am pdt Fri aug 18 2017

Synopsis
The warm and dry weather is expected to persist through at least
the early part of next week. Breezy and dry winds this afternoon
and evening will raise concerns for wildfires. Our weather on
Monday should be favorable for good views of the eclipse with
mainly clear skies. Periods of smoke and haze are expected over
the next several days along the canadian border and in the
vicinity of active fires in washington and idaho.

Discussion
Today through Saturday night... A dry west to northwest flow aloft
continues with near seasonal temperatures. For today an upper
trough moving into british columbia will send a dry cold front
through the region during the evening and overnight hours. Ahead
of the front prefrontal southwest winds will become locally breezy
in the afternoon. Then as the front passes into central wa by
early this evening winds will further increase especially through
the gaps such as wenatchee, chelan, as well as the waterville
plateau, vantage, and ephrata areas. This combined with low
relative humidity will lead to the potential for rapid fire spread
with any new or existing fires. The most critical wind rh
combination is expected in the wenatchee area where a red flag
warning remains in effect from 4 pm to 8 pm. As winds switch to
north-northwest behind the dry cold front overnight in central and
ne washington into the N idaho panhandle there will be increased
opportunity for smoke from bc fires to move into the northern
valleys by Saturday morning. Local fires may add some smoke
contribution as well. Drier air behind the cold front will lead to
mostly clear skies and lighter winds of 5-10 mph for Saturday
except locally breezy near the cascade gaps. Jw
Sunday: high temperatures have been lowered a couple degrees for
sun. The models have trended a bit deeper with a pair of
shortwaves for Sunday and Sunday night. Bands of mid and high
level clouds and slightly cooler 850mb temps suggest that we will
only top out in the low to mid 80s over most of the region.

Monday: the weather continues to look favorable for viewing the
eclipse across the inland northwest. The evening run of the gfs
has trended a bit slower with the progression of a weak shortwave
trough. At this time, it looks like bands of mid and high clouds
will exit north idaho and eastern washington early Monday morning
for mostly clear conditions by eclipse time. Wildfire smoke may
produce some hazy conditions locally, but fire activity the last
few days has not been producing smoke to the extent we saw a week
ago.

Tuesday and Wednesday: our warmest days of next week will occur
tue and Wed as a broad high pressure ridge builds over the
northern rockies. High temperatures should peak in the upper 80s
to mid 90s for Tuesday and Wednesday. Over the last few model
runs, the trend has been for a flatter pattern for the middle and
latter part of next week. The gfs, ecmwf, and canadian models show
little indication of monsoonal moisture over our region
Tuesday... So precipitation chances have been removed until late
tue night. At this time, it looks like Wed afternoon into wed
night will feature our best chance for showers and thunderstorms
over the central and southern panhandle.

Thursday and Friday: Thursday has the potential to be quite windy.

The medium range models push a vigorous 500mb trough through
southern british columbia Thursday. If this verifies, look for a
deep surface low to develop over the canadian prairies by Thursday
afternoon and a tight west to east pressure gradient across wa id.

This system is 7 days out (so a lot could change), but this
pattern is notorious for wind and has the potential to be stronger
than anything we have seen this fire season. Gkoch

Aviation
12z tafs: a dry cold front approaches late this afternoon and
evening with speeds on the order of 15-20 mph coupled with gusts
to 20-30 mph. Strongest winds will be in the lee of the cascades
spilling into the western columbia basin. Skies will remain
generally clear except for a band of high clouds tracking across
the area today. Jw

Preliminary point temps pops
Spokane 85 58 81 56 81 57 0 0 0 0 0 0
coeur d'alene 85 55 80 52 80 52 0 0 0 0 0 0
pullman 85 54 79 51 79 52 0 0 0 0 0 0
lewiston 92 62 86 59 86 60 0 0 0 0 0 0
colville 87 52 84 50 84 51 0 0 0 0 0 0
sandpoint 84 50 79 46 79 46 0 0 0 0 0 0
kellogg 82 52 77 50 77 51 0 0 0 0 0 0
moses lake 90 59 85 54 85 56 0 0 0 0 0 0
wenatchee 89 63 85 61 85 63 0 0 0 0 0 0
omak 91 59 87 57 87 58 0 0 0 0 0 0

Otx watches warnings advisories
Id... None.

Wa... Red flag warning from 4 pm this afternoon to 8 pm pdt this
evening for east washington central cascade valleys (zone
677).



Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Omak Airport, WA35 mi23 minN 010.00 miFair70°F39°F34%1015.4 hPa

Wind History from OMK (wind in knots)
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Last 24hrN10N11N10
G16
35SW8S8SW9S8S6S9S9S8S7W6W6W6W6W4N3NW4CalmCalmCalm
1 day agoN8Calm56S7SE11S9
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W10NW9NW8N9NW8N11N10N11N11NW7NW8NW9NW9NW7N7N7
2 days agoN9N7SE5S6S6SW7S5SW8SW8S4S6S7S7W4NW7W7NW5W8N7N6N8NW5N7N9

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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Weather Map
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IR Satellite Image from GEOS
west_satellite

GOES Local Image of PacificNorthwest    EDIT
Geos

Wind Forecast for Spokane, WA (12,3,4,5)
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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 numerious 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.