Tuesday, April20, 2021
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Marine Weather and Tides
Kalama, WA

Version 3.4
NOTICE
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 6:13AMSunset 8:07PM Tuesday April 20, 2021 3:08 AM PDT (10:08 UTC) Moonrise 11:15AMMoonset 2:25AM Illumination 60% Phase: Waxing Gibbous; Moon at 8 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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PZZ210 Columbia River Bar- 310 Pm Pdt Mon Apr 19 2021
In the main channel.. - general seas...2 to 4 feet, building to 4 to 6 feet Tuesday. - first ebb...around 1115 pm Monday. Seas to 4 ft. - second ebb...around 1115 am Tuesday. Seas to 5 feet. - third ebb...around 1245 am Wednesday. Seas to 7 feet.
PZZ200 310 Pm Pdt Mon Apr 19 2021
Synopsis for the southern washington and northern oregon coast.. High pressure over the coastal waters will continue through much of the week. A thermal low will persist from northern california and extend into oregon which will strengthen northerly winds Tuesday and persist into the middle of the week.


7 Day Forecast for Marine Location Near Kalama, WA
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location: 46, -122.85     debug


Area Discussion for - Portland, OR
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FXUS66 KPQR 200350 AAA AFDPQR

Area Forecast Discussion National Weather Service Portland OR 850 PM PDT Mon Apr 19 2021

SYNOPSIS. Bit cooler over the next several days, but still warmer than normally expected for mid-April, primarily inland. Weak system passing south along the coast will maintain clouds tonight into Tue, along with a few very light showers along the caost and across Lane County overnight. Cooler weather arrives for the weekend, along with return of clouds and rain. Yes folks, rain.

SHORT TERM. Tonight through Wednesday . Not much change in the overall pattern, as weak upper level system offshore will continue to drift farther southward tonight. Will maintain quite a bit of mid and high level clouds over the region tonight, along with areas of stratus along the coast. Not much in way of rainfall expected, but will see a few very light showers off the Oregon Coast tonight, and perhaps onshore from Lincoln City southward, and into Lane County overnight. But, any precipitation will be spotty and rather light. Will maintain some PoPs for those areas tonight.

Main effect is the intrusion of cooler air into the interior this evening, to west and south of Salem. As of 8 pm, Corvallis was down to 56 deg, thanks to a breezy west wind of 15 to 20 mph. Most areas in the south and central Willamette Valley had a west to northwest wind, along with temperatures in the 50s to lower 60s. Farther north, not so much onshore flow as will see some degree of weaker easterly winds overnight.

Weak shortwave ridging shifting southward across the Pacific Northwest Tuesday into Wednesday and a continuation of easterly winds at 850mb should result in temperatures warming slightly for interior locations through midweek. However, inland temperatures should remain short of 80F and certainly well short of any record high temperatures. The latest high resolution model guidance suggests winds should remain below critical fire weather thresholds as well. As usual, the coast will be vastly cooler and moister with morning clouds and afternoon sunshine both days. LONG TERM. Thursday through Sunday . High pressure will break down Thursday into Friday as low pressure approaches from the west. This will boost onshore flow bringing the marine layer past the Coast Range. Humidity will increase and temperatures will trend back down towards climatological norms. Onshore flow will continue and strengthen moving into the weekend as the upper level disturbance moves over the area. Guidance is in general agreement that rain will likely start late Friday into Saturday. The system stays off the coast keeping onshore, showery conditions through the weekend and into Monday as it weakens.

AVIATION. Overall, VFR will dominatate tonight for areas from the Coast Ranges eastward across the region, with variable mid/high clouds. But, will see areas of MVFR, possibly higher IFR, along the coast where have cooler more moist air in place. But, may take several more hours till the low clouds solidify.

As the weak upper disturbance offshore sinks farther to the south tonight into Tue am, will see clouds gradually thin and drift southward, with mostly clear skies by 16Z to 18Z Tue. Coastal MVFR will gradually break apart between 14Z and 17Z, with clearing from north to south after 18Z. Will see locally breezy north winds along the coast after 19Z, and inland valleys after 21Z as north to south gradients increase a bit.

For detailed regional Pac NW aviation weather information, go online to: https://weather.gov/zse

KPDX AND APPROACHES . VFR, with variable mid/high clouds tonight and clearing early Tue am. East winds will gradually ease tonight, then becoming northerly Tue afternoon. /Rockey

MARINE. High pressure aloft continues over the coastal waters bringing rather benign wave conditions through much of the week. Surface thermal low over the OR/CA border will build northward bringing stronger northerly winds across the waters. Small craft advisory winds are expected late tonight into Tuesday night, mainly across the southern outer waters. Seas will build to around 7 ft Tuesday as a westerly swell moves onshore but will fall back to around 5 ft by Wednesday. Winds will shift to a southerly regime Friday night as a weak front moves onshore.

PQR WATCHES/WARNINGS/ADVISORIES. OR . None. WA . None. PZ . Small Craft Advisory for late tonight through Tue evening evening for coastal waters from Cascade Head to Florence, from shore out 60 nm.



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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 9 mi50 min 53°F1023.1 hPa
ASTO3 - 9439040 - Astoria, OR 51 mi50 min SE 4.1 G 5.1 48°F 54°F1023.2 hPa
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 64 mi50 min 1023.3 hPa

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Southwest Washington Regional Airport, WA9 mi72 minN 010.00 miFair47°F45°F93%1023.7 hPa
Scappoose Industrial Airpark, OR16 mi75 minN 010.00 miFair50°F38°F63%1022 hPa

Link to 5 minute data for KKLS

Wind History from KLS (wind in knots)
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Last 24hrCalmCalmCalmCalmS3Calm333S4S8S7S8S7S54NW643N4NE3CalmCalmCalm
1 day agoCalmCalmCalmCalmCalmCalmS5344W5W8
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NW7NW7NW7CalmCalmCalmCalmCalmN3Calm
2 days agoCalmCalmCalmCalmCalmCalmCalmN4N4W3S5S5S5S3CalmNW36CalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for Vancouver, Columbia River, Washington (dubious accuracy)
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Vancouver
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Tue -- 12:00 AM PDT     First Quarter
Tue -- 02:02 AM PDT     1.23 feet High Tide
Tue -- 03:22 AM PDT     Moonset
Tue -- 05:04 AM PDT     0.85 feet Low Tide
Tue -- 06:15 AM PDT     Sunrise
Tue -- 07:43 AM PDT     1.09 feet High Tide
Tue -- 10:05 AM PDT     0.89 feet Low Tide
Tue -- 12:15 PM PDT     Moonrise
Tue -- 01:45 PM PDT     1.63 feet High Tide
Tue -- 06:19 PM PDT     0.50 feet Low Tide
Tue -- 07:35 PM PDT     0.53 feet High Tide
Tue -- 08:04 PM PDT     Sunset
Tue -- 10:41 PM PDT     0.15 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.81.11.21.110.90.91.11.110.911.31.51.61.410.70.50.50.50.40.20.2

Tide / Current Tables for Knappa, Knappa Slough, Columbia River, Oregon
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Knappa
Click for Map
Tue -- 12:00 AM PDT     First Quarter
Tue -- 02:31 AM PDT     3.33 feet Low Tide
Tue -- 03:28 AM PDT     Moonset
Tue -- 06:18 AM PDT     Sunrise
Tue -- 07:36 AM PDT     6.97 feet High Tide
Tue -- 12:17 PM PDT     Moonrise
Tue -- 03:42 PM PDT     0.73 feet Low Tide
Tue -- 08:09 PM PDT     Sunset
Tue -- 10:13 PM PDT     6.10 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.33.73.43.43.956.16.86.96.55.74.53.22.11.30.80.81.22.23.44.65.66.15.9

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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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