Klickitat, WA Marine Weather and Tide Forecast
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Marine Weather and Tide Forecast for Klickitat, WA

April 21, 2024 2:31 AM PDT (09:31 UTC) Change Location
Sunrise 6:00 AM   Sunset 8:00 PM
Moonrise 4:59 PM   Moonset 4:17 AM 
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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.

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7 Day Forecast for Marine Location Near Klickitat, WA
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Area Discussion for - Pendleton, OR
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FXUS66 KPDT 210511 AFDPDT

Area Forecast Discussion National Weather Service Pendleton OR 1015 PM PDT Sat Apr 20 2024

Updated Aviation Discussion

SHORT TERM UPDATE
A cold front sweeping across WA/OR has a well-defined back edge just west of the Cascade Range on satellite loops. There has been limited moisture with weak returns over south central WA and a brief period of light rain in Yakima. The biggest impact with the front will be the increasing winds just ahead and behind the front that will decrease early Sunday morning. WSW winds will gust to 30-45 mph in many areas but small probabilities of gusts greater than 45 mph. The 00Z HRRR has only small areas of the Rattlesnake Hills and the Simcoe Highlands with 70% or higher for gusts greater than 45 mph. 00Z UIL sounding shows 35 kt winds between 850-700mb which increases confidence that the approaching front will not warrant wind advisories. Minor updates were made to the current forecast, mainly to introduce isolated showers for portions of south central WA this evening.
Wister/85

AVIATION
06Z TAFs...A cold front is making its way across the Columbia Basin, causing winds to increase and shift to the WNW with gusts to 20-25kt at DLS, PDT, ALW and PSC. YKM may also have brief gusts to around 20kt for the next hour or two. RDM and BDN are not observing the same wind gusts but will have winds from the NW sustained around 10-15kt. Gradients will weaken and winds will decrease early Sunday morning. There may be a few sprinkles or a brief shower at the terminal airports, but not worth mentioning in the TAFs. Mid and high level clouds with bases AOA 7K feet will decrease Sunday morning followed by thin cirrus. Wister/85



PREV DISCUSSION
/issued 450 PM PDT Sat Apr 20 2024/

SHORT TERM...
Tonight through Monday night...High pressure will continue moving east of the area tonight. As it does, an area of low pressure will move into British Columbia. The pressure gradient between these two features will cause an increase in winds later this evening through Sunday morning, followed by a slow decrease through Sunday. A cold front will move across the area this evening through tonight and will cause a further enhancement to the winds.
A few showers (rain or snow) are possible mainly over the mountains as the front passes.

After Sunday, the remainder of the short term period is dry, first under a westerly flow and then a ridge build in for later Monday into Monday night.

As far as winds, they will increase this evening and become gusty, generally in the 25 to 35 mph range with some gusts as high as 40 mph, especially over the Simcoe Highlands and possibly portions of the Columbia Basin and Blue Mountain Foothills. The NBM probabilities for winds >= 39 mph probabilities range from about 30 to 80% across the Simcoe Highlands and about 20 to 40% across the Columbia Basin and Blue Mountain Foothills. The NBM probabilities for winds >= 47 mph are significantly less. They are about 20 to 50% in the Simcoe Highlands and generally less than 20% in other areas.

Winds should peak late tonight into Sunday morning. Winds will decrease during Sunday but will remain breezy, generally in the 15 to 25 mph range. Winds will further decrease Sunday night. At this time, no wind advisories are being issued, but will keep watching to see as the front approaches if winds are higher than currently expected.

Temperatures will be a bit lower on Sunday, behind the front and will be slightly below normal. With highs returning to near normal on Monday. Sunday night looks to be another colder night and while temperatures look marginal at this point, some freeze warnings may end up being needed.

LONG TERM...
Tuesday through Saturday...Models start out in good agreement Tuesday then differences increase over time, so forecast confidence is low. On Tuesday, a transitory ridge will move out of the area while an upper low and trough sinks south out of the Gulf of Alaska and down the British Columbia coast. 85 percent of the GFS ensemble members favor rain showers over the mountains Tuesday evening with little support from the ECMWF or Canadian.
Allowing for the GFS, have a slight chance of mountain rain showers (15-25 percent) with amounts of less than a tenth of an inch while snow levels will be at 6000-8000 feet. The ridge and a southwest flow over the area will warm temperatures around 5 degrees from Monday with highs in the upper 60s to lower 70s in the lower elevations and in the 60s in the mountains.

A few differences arise in the models on Wednesday as the trough moves overhead. The ECMWF and Canadian ensemble members mostly favor the upper low being over central British Columbia giving us a westerly flow. 83 percent of the GFS ensemble members keep the low offshore with a southwest flow over our area which is more favorable for rain. Have kept a slight chance of very light rain over the mountains with barely measurable amounts. Snow levels will remain at 5000-6000 feet. With the trough tightening pressure gradients, breezy winds are expected in the afternoon. Temperatures will be a few degrees cooler than Tuesday.

Model differences increase on Thursday as 90 percent of the GFS ensemble members and 30 percent of the ECMWF members keep the upper low along the British Columbia coast and even strengthen it a bit while the rest of the ECMWF and nearly all of the Canadian ensemble members have a weaker upper low crossing the Canadian Rockies.
Models all show a front or open wave arriving in the late afternoon and overnight with the GFS having a strong well defined front while the other deterministic runs looking weak and disorganized. Have a chance of rain showers over the mountains and in central Oregon.
Rain amounts will be one to two tenths of an inch in the Cascades and less than a tenth of an inch elsewhere. Snow levels will remain around 5000 feet. Temperatures will cool a few more degrees with highs in the 60s in the Columbia basin and in the mid 50s to lower 60s elsewhere.

By Friday, forecast confidence decreases further as model ensemble members have conflicting solutions. 85 percent of the GFS members and 40-50 percent of the ECMWF and Canadian members have closed low or an open wave along the Washington Oregon coast. Other model ensemble members have a shallower trough centered over the Rockies with some members having a closed low forming over central or southern California. Have gone with a chance of rain over the area (25-55 percent) mainly in the afternoon with up to a quarter inch in the mountains, around a tenth of an inch in the Blue Mountain Foothills and just a few hundredths of an inch in the rest of the lower elevations. Temperatures will drop another degree or two from Thursday.

On Saturday, the GFS members (75 percent) continues to favor a trough over the area with only mild support from the ECMWF and Canadian. The ECMWF and Canadian tend to favor the trough over the Rockies with a ridge developing out in the eastern Pacific. Have a 20-40 percent chance of rain over the mountains with the lower elevations dry. Temperatures will warm 2-3 degrees to the 60s and lower 70s with 50s in the mountains. Perry/83



PRELIMINARY POINT TEMPS/POPS
PDT 38 58 33 63 / 10 0 0 0 ALW 41 61 36 65 / 20 0 0 0 PSC 43 65 39 67 / 10 0 0 0 YKM 35 63 32 66 / 20 0 0 0 HRI 41 63 35 67 / 10 0 0 0 ELN 36 57 32 64 / 20 0 0 0 RDM 31 57 29 66 / 0 0 0 0 LGD 37 55 30 63 / 10 0 0 0 GCD 37 58 30 66 / 10 0 0 0 DLS 41 63 37 68 / 10 0 0 0

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




Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherTempDewPtRHinHg
KDLS33 sm38 minWNW 0810 smMostly Cloudy48°F36°F62%30.28
Link to 5 minute data for KDLS


Wind History from DLS
(wind in knots)
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Tide / Current for Vancouver, Columbia River, Washington (dubious accuracy)
   
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Vancouver
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Sun -- 01:44 AM PDT     0.11 feet Low Tide
Sun -- 05:24 AM PDT     Moonset
Sun -- 06:13 AM PDT     Sunrise
Sun -- 06:22 AM PDT     1.51 feet High Tide
Sun -- 02:12 PM PDT     0.07 feet Low Tide
Sun -- 06:05 PM PDT     Moonrise
Sun -- 06:39 PM PDT     1.37 feet High Tide
Sun -- 08:05 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Vancouver, Columbia River, Washington (dubious accuracy), Tide feet
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Tide / Current for
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GEOS Local Image of Pacific Northwest   
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Pendleton, OR,



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