Monday, September27, 2021
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Marine Weather and Tides
Yakima, WA

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
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 6:54AMSunset 6:50PM Monday September 27, 2021 12:56 AM PDT (07:56 UTC) Moonrise 9:16PMMoonset 12:54PM Illumination 66% Phase: Waning Gibbous; Moon at 21 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 Yakima, WA
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location: 46.61, -120.53     debug


Area Discussion for - Pendleton, OR
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FXUS66 KPDT 270534 AAA AFDPDT

Area Forecast Discussion National Weather Service Pendleton OR 1030 PM PDT Sun Sep 26 2021

updated the aviation discussion

UPDATE. The latest radar was showing a band of rain along the wa/or cascades. This band of rain is forecast to drift east and may lean somewhat toward the more aggressive gfs soln than both the hrrr and rap with pushing the showers into portions of the basin toward morning. Meanwhile pressure gradients tighten and surface winds may increase some overnight. Otherwise minor changes were done to the low temps and the present short term forecast appears on track. Furthermore and into Monday the models were even more aggressive with a cold front tracking through the region and another round of showers along with increasing qpf amounts are expected into Monday night and the current forecast reflects this.

AVIATION . Mainly vfr conditions should prevail at most taf sites through the next 24 hours. Meanwhile showers should develop after 12z at taf sites kdls . kykm . krdm . kbdn. Then showers should develop at the remaining taf sites after 20z. lcl mvfr conditions could be approached at any taf site in heavier showers due to lowering ceilings. Also brief wind gusts to 20 kts is also possible with the passing of the cold front between 18z and 22z.

PREV DISCUSSION. /issued 458 PM PDT Sun Sep 26 2021/

SHORT TERM . Tonight through Tuesday . An upper level trough with a leading cold front will continue to approach the forecast area tonight. Out ahead of the frontal boundary, showers are starting to form along the WA coast as a shortwave in the southwest flow aloft is coming onshore. These showers will continue to push east into tonight, with light precipitation starting along the WA Cascades late this evening. Early tomorrow, the cold front will slowly move across the western half of OR/WA and stall against the Cascades for a couple of hours. This will allow a good chance of precip along the Cascade crests, with some spillover on the east slopes. By tomorrow afternoon, the cold front will cross the Cascades and move southeast across the forecast area, bringing a chance of rain showers across most of the forecast area. Ahead and behind the cold front, breezy winds will develop across the lowlands, with strongest winds in central OR. Tuesday, in the wake of the aforementioned cold front, the trough will swing across the forecast area starting in the morning, and sustain rain showers mainly across the mountains through the evening. Snow showers may be possible across the Cascade Crests and the Wallowas, as snow levels behind the cold front will drop to around 5,500ft in the morning. Breezy westerly winds will redevelop with trough axis passage, especially in portions of the Basin and the Simcoe Highlands where gusts may get up to 30-35 mph. The trough axis will exit to the east by Tuesday evening, with most precipitation chances sharply declining and skies clearing in the Basin behind the trough axis passage. Temperatures will be near normal for today and tomorrow, while below normal temperatures can be expected for Tuesday. Lawhorn/82

LONG TERM . Wednesday through Sunday . Mean ensembles show a shortwave ridge developing in the wake of the aforementioned trough in the short-term. The ridge peaks Wednesday afternoon as southwest flow develops ahead of the next trough over the eastern Pacific. The trough pushes onshore Thursday, weakens, and exits the region by Friday afternoon. Weak ridging is expected to develop in it's wake Saturday and Sunday. There are some discrepancies between the models with the EOFs showing differences, mainly in timing. However, these differences become quite large in the developing trough for next week.

The deterministic models are in fairly good agreement showing the trough pushing through the area by Friday evening. At this time, the ECMWF is a little slower than the GFS in pushing it eastward. The best chance for precipitation will be over the Cascades Wednesday night into Thursday and over the northeast Oregon mountains Thursday evening. Both models show an upper level ridge developing over Oregon by the weekend. The GFS is stronger and centered over Oregon while the ECMWF is flatter/weaker and centered off the Oregon coast. As mentioned earlier, the EOFs show a large discrepancy in timing and strength of the through next week which will have an impact on the strength of this developing ridge. Despite these differences, daytime highs will begin below normal Wednesday but they will remain above normal through the rest of the period. Earle

PRELIMINARY POINT TEMPS/POPS. PDT 54 74 46 62 / 10 30 80 30 ALW 58 76 49 63 / 10 20 80 30 PSC 60 75 53 67 / 20 30 70 20 YKM 54 68 43 64 / 20 40 30 20 HRI 56 74 49 66 / 20 30 70 20 ELN 53 64 43 59 / 30 50 30 30 RDM 49 68 37 58 / 30 60 70 20 LGD 49 75 43 56 / 10 20 80 50 GCD 48 76 41 57 / 10 20 80 40 DLS 59 67 50 64 / 50 70 60 40

PDT WATCHES/WARNINGS/ADVISORIES. OR . None. WA . None.

SHORT TERM . 97 LONG TERM . 99 AVIATION . 97


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Yakima Air Terminal - McAllister Field, WA3 mi63 minS 17 G 2910.00 miBlowing Dust67°F56°F68%1005.5 hPa

Link to 5 minute data for KYKM

Wind History from YKM (wind in knots)
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Last 24hrW5CalmW6W3NW3CalmNW5W6W3CalmCalmCalmE54SE6SE9
G17
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1 day agoW7W7W7W6W7W6W5W4CalmCalmCalmE33E74S5S4S4CalmW4W5W4W6NW4
2 days agoW7W5W8CalmW7W3W6W6W5NW33N4Calm4Calm3S43SW4W3W6W7W5NW6

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: 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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