Wednesday, November14, 2018 L-36.com


Marine Weather and Tides
Yakima, WA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:02AMSunset 4:30PM Wednesday November 14, 2018 12:03 PM PST (20:03 UTC) Moonrise 12:56PMMoonset 10:38PM Illumination 42% Phase: First Quarter Moon; Moon at 7 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 Yakima, WA
   Hourly   EDIT   Help
location: 46.61, -120.53     debug


Area Discussion for - Pendleton, OR
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kpdt 141740
afdpdt
area forecast discussion
national weather service pendleton or
940 am pst Wed nov 14 2018

Update A flat westerly flow is over the area today as a system
passing through canada has flattened the ridge that has been over
the area. The system will brush the northern half of the area,
mainly washington. The tricky question with the morning update is
whether the system will be strong enough to break the inversion in
the columbia basin and mix out the low clouds. Clouds have been
breaking up around pendleton but with winds switching to the
northwest there, it could easily push the clouds back in there.

Walla walla and the rest of the columbia basin remain socked in
with overcast skies at 1000 feet or lower. Radar and satellite
shows the front and precipitation is just reaching the cascades
now, so any clearing may not happen until this afternoon. Kept a
slight chance of freezing rain this morning in the forecast for
the east slopes of the washington cascades due to a few places
remaining below freezing though most of that area has warmed to
above freezing, so the impact of freezing rain should be limited.

The forecast for the columbia basin is very uncertain. Winds aloft
at 5000 feet are around 30 mph and if that can mix down to the
surface, skies will clear. If skies clear, temperatures may reach
the 50s. If the low clouds persist, temperatures may stay in the
lower 30s. Current forecast has the columbia basin in the lower
40s and near 50 in the blue mountain foothills. Made just a few
minor changes to that and will update as needed. Further south,
from the blue mountains and north central oregon southward it
should be a mostly sunny day with highs in the 50s. Forecast
update already out. Perry

Aviation 18z tafs... Increasing west-southwesterly flow has eroded
near surface inversions across the columbia basin with the
stratus deck reported via pirep surface ob trends around 1000 ft
thick. Expect to see continued improvement in vis cig in this area
through the afternoon. Residual subsidence inversions in the 2000
to 3000 ft agl range across the basin will keep trapped
moisture pollutants that have accumulated over the last several
days near the surface, so will likely see at least some patchy fog
redevelopment overnight across the basin, but do not expect this
to be nearly as thick as the last couple days. Peck

Prev discussion issued 236 am pst Wed nov 14 2018
short term... Today through Thursday... Ridge of high pressure over
the region has been flattened by a weather system moving into and
through western canada. The southern portion of this system will
clip washington today leading to some showers along the cascade
crest and the eastern slopes. With temperatures below freezing this
morning there could be some light freezing rain occur in some
east slope areas until temperatures climb above freezing late
morning to midday. This system will weaken the columbia basin
inversion and does have some wind aloft which will help mix out some
of the low stratus and fog trapped in the lower columbia basin but
where and when is hard to put a finger on. Most likely there will be
some improvement over northern oregon but areas north of the simcoe
mountains and horse heaven hills will be less likely to mix out. The
flat ridge will persist over the region tonight and Thursday
following the departure of todays system.

Long term... Thursday night through Wednesday... The persistent upper
ridge will be positioned offshore on Thursday night as an upper
shortwave trough drops SE out of british columbia through washington
and oregon Friday and Saturday. This system is trending weaker in
the latest deterministic model runs with a bit less moisture... But
there will still be a chance of a few rain showers over the
northeast mountains and washington cascade crest on Friday before
ending by Friday evening. Saturday looks to be a dry day with partly
cloudy skies and highs mostly in the 40s. The ridge builds back over
the region late Saturday night through Monday with patchy to areas
of fog and freezing fog a good bet in the lower basins. By Tuesday
more of a split flow regime develops with increasing southerly flow
aloft over the area. Cannot rule out that the cold pool will linger
over the columbia basin especially in washington but for now have
forecasted an end to the stratus and fog. A storm system will make
its way towards the area by Wednesday with the ECMWF faster than the
gfs. Used a blended approach to timing of the pops for Tuesday night
into Wednesday but nudged towards the slower GFS given the
persistence of the ridge the past few weeks. 78

Preliminary point temps pops
Pdt 50 36 50 34 0 0 0 10
alw 46 36 51 40 0 0 0 20
psc 43 31 50 39 0 0 0 10
ykm 42 30 50 35 10 0 0 10
hri 45 33 51 37 0 0 0 10
eln 46 34 50 35 20 10 0 10
rdm 58 27 56 28 0 0 0 0
lgd 50 36 54 35 0 10 0 10
gcd 55 35 55 33 0 0 0 0
dls 48 36 54 40 10 10 0 0

Pdt watches warnings advisories
Or... None.

Wa... Air stagnation advisory until 1 pm pst Friday for waz027.

83 74 74


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
Yakima Air Terminal - McAllister Field, WA3 mi70 minENE 32.00 miFog/Mist32°F28°F88%1029.2 hPa

Wind History from YKM (wind in knots)
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
Last 24hrSE3E6SE4S5W3W3W4SW3CalmW4W3NW3SW3W4CalmCalmCalmCalmCalmCalmCalmSE3NE3Calm
1 day agoE4NE4NE5E3E5E4CalmW4CalmCalmSW4SW5CalmCalmCalmCalmSW3CalmSW3SW3CalmCalmE5E4
2 days agoE5S8S5S5E4E7CalmCalmCalmCalmCalmCalmCalmSW3W3SW3SW4CalmSW4W3W3CalmCalm3

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)   HelpWeather Map
wmap_P
GOES 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 Pendleton, OR (15,3,4,5)
      (on/off)   Help

Ground Weather Radar Station Pendleton, OR
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.