Friday, August18, 2017

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 6:00AMSunset 8:09PM Thursday August 17, 2017 11:42 PM PDT (06:42 UTC) Moonrise 12:27AMMoonset 4:07PM Illumination 17% 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
    EDIT      (on/off)   Help
7 Day Forecast for Marine Location Near Winthrop, WA
   Hourly   EDIT   Help
location: 48.47, -120.18     debug

Area Discussion for - Spokane, WA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kotx 180536
area forecast discussion
national weather service spokane wa
1036 pm pdt Thu aug 17 2017

The warm and dry weather is expected to persist through at least
the early part of next week. Breezy and dry winds on Friday will
raise concerns for wildfires. Our weather on Monday should be
favorable for good views of the eclipse with mainly clear skies.

Areas of smoke will continue. There is the potential for mountain
thunderstorms in north idaho by middle of next week.

Tonight through Saturday: dry westerly flow will remain over the
inland northwest with seasonably warm temperatures. Few cumulus
over the panhandle mountains will dissipate early this evening,
meanwhile bands of smoke aloft will most likely spread in from the
northwest. A weak ridge aloft will flatten tonight into Friday as
a dry cold front swings inland. This feature will push east of the
cascades Friday afternoon and reach north idaho by early evening.

Winds ahead of the front will steadily increase, and become breezy
with the frontal passage with gusts of 20 to 25 mph. This may stir
up area fires and cause more smoke. Temperatures will cool
slightly Friday night as wind dissipate. The cooling will continue
into Saturday will less wind. Some mountain cumulus may develop
over northeast washington and north idaho, although precipitation
chances are very low. Rfox.

Saturday night through Tuesday... Strong model agreement exists
for this period featuring dry zonal flow on Saturday... A weak
troffy pattern on Sunday with the forecast area under the dry
northern branch region of a broad western us split flow
trough... And then a building ridge and warm up for Monday and
Tuesday as a trough digs offshore. No precipitation is expected
through this period. Temperatures will begin the weekend slightly
above normal and then increase on Monday and Tuesday. Smoke
infiltration from bc and local smoke from eastern washington fires
will mainly impact the northern zones on Saturday and Sunday and
probably retrograde to the north as flow becomes more
southwesterly on Monday. The eclipse viewing will probably be
through mostly clear skies Monday... Or at worse through some thin
cirrus. All in all there is high confidence that it will be a
benign and seasonably warm weekend and early work week.

Wednesday and Thursday... Model differences become noticeable by
Wednesday and forecast confidence degrades. The GFS suggests the
offshore will kick inland and through the region during this
period with a thunderstorm threat mainly on Wednesday ahead of
it... Then a breezy cold front passage Thursday. The ECMWF suggest
a deeper and slower trough arrival suggesting another warm day
Thursday with a longer period of thunderstorm threat in moist
southerly flow. Given the recent pattern shift to a more
progressive flow regime and the anomalous nature for high summer
of the ec solution... Will hedge toward the more progressive gfs
model... Which also has some loose support from the latest
canadian model run. This argues for at least a small threat of
thunderstorms somewhere over the forecast area on Wednesday
followed by a slightly cooler... Dry and breezy period on Thursday.


06z tafs: locally breezy northwest winds will develop around
wenatchee tonight... Otherwise light terrain driven winds will be
in place through 18z fri. A dry cold front to bring the next push
of west northwest winds late Friday 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. Sb

Fire weather
The dry cold front will bring gusty winds across the region for
Friday. The wind speeds of 15 to 20 mph will be the strongest
from the cascade valleys into the western columbia basin Friday
late afternoon and early evening, while relative humidities drop
into the teens. The winds and dry conditions will lead to
increased fire spread. The timing of the strongest winds and low
humidity's seems to meet the best in the wenatchee valley,
although it will be a short window. Humidities will be on the rise
through the evening despite the breezy winds persisting
overnight. The fire weather watch will be upgraded to a red flag
warning for the east washington central cascade valleys (zone 677)
for late Friday afternoon and early evening. Low level
instability will be elevated with the front that may make current
fires more active. Winds will be lighter through the weekend,
although occasional gap winds are expected in the cascade valleys.


Preliminary point temps pops
Spokane 57 85 58 82 58 83 0 0 0 0 0 0
coeur d'alene 54 85 55 81 54 82 0 0 0 0 0 0
pullman 53 85 54 80 53 80 0 0 0 0 0 0
lewiston 62 93 62 88 61 88 0 0 0 0 0 0
colville 52 88 52 85 51 85 0 0 0 0 0 0
sandpoint 49 84 50 80 47 81 0 0 0 0 0 0
kellogg 52 81 52 77 51 79 0 0 0 0 0 0
moses lake 59 90 59 87 55 87 0 0 0 0 0 0
wenatchee 64 88 63 86 62 88 0 0 0 0 0 0
omak 60 92 59 87 58 89 0 0 0 0 0 0

Otx watches warnings advisories
Id... None.

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

Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Omak Airport, WA35 mi50 minS 710.00 miFair76°F39°F27%1014 hPa

Wind History from OMK (wind in knots)
Last 24hrN10N11N11NW7NW8NW9NW9NW7N7N7N10N11N10
1 day agoNW7W7NW5W8N7N6N8NW5N7N9N8Calm56S7SE11S9
2 days agoNW55NW7N8N8N8N10N9N10N10N9N7SE5S6S6SW7S5SW8SW8S4S6S7S7W4

Tide / Current Tables for
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help
Tide / Current Tables for
   EDIT      (on/off)   Help
Weather Map and Satellite Images
       (on/off)   Help
Weather Map
IR Satellite Image from GEOS

GOES Local Image of PacificNorthwest    EDIT

Wind Forecast for Spokane, WA (2,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Spokane, WA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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 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 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.