Tuesday, July27, 2021
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Marine Weather and Tides
Cathlamet, 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 5:45AMSunset 8:50PM Monday July 26, 2021 9:53 PM PDT (04:53 UTC) Moonrise 9:51PMMoonset 7:38AM Illumination 92% Phase: Waning Gibbous; Moon at 18 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- 910 Pm Pdt Mon Jul 26 2021
In the main channel.. - general seas...around 2 ft through Tuesday. - first ebb....Around 745 pm Mon, with seas easing from 4 ft. - second ebb...strong ebb around 745 am Tue, with seas near 4 ft. - third ebb...around 830 pm Tue, with seas near 3 ft.
PZZ200 910 Pm Pdt Mon Jul 26 2021
Synopsis for the southern washington and northern oregon coast.. Typical mid-summer northerly wind pattern into next week. High pressure remains anchored well offshore, while thermal low pressure sits over nw california into extreme sw oregon.


7 Day Forecast for Marine Location Near Cathlamet, WA
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location: 46.2, -123.38     debug


Area Discussion for - Portland, OR
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FXUS66 KPQR 270407 AAA AFDPQR

Area Forecast Discussion . UPDATED National Weather Service Portland OR 907 PM PDT Mon Jul 26 2021

Updated aviation and marine discussions.

SYNOPSIS. Above normal temperatures continue through this week as high pressure strengthens across the Intermountain West, with the hottest conditions expected Thursday and Friday, with hot temperatures continuing through Sunday. A slight chance of showers and thunderstorms along the central Oregon Cascades tonight and continuing through at least the middle of the week.

SHORT TERM. Tonight through Friday . A broad upper level high pressure anchored across The Great Basin will slowly meander northward through the middle of the week. This will result in a gradual warming trend over the next few days, as reflected in the 850 mb temperatures, with the hottest days expected Thursday and Friday. 850 mb temperatures will slowly increase from the low to mid teens Tuesday and Wednesday, peaking around 20C to 22C Thursday and Friday. This will mean that temperatures for the week will remain above normal in the upper 80s to low 90s for Tuesday and Wednesday, and likely reaching into the mid to upper 90s Thursday and Friday. At this time models including the NBM, which did an outstanding job at predicting the record breaking heat in June, are not showing triple digit temperatures except, in the 90th to 95th percentile runs, which means that there is a ~10% chance that temperatures of 100 to 105 could happen within the Willamette Valley during this event. Therefore, while temperatures will be very hot, am not expecting record breaking temperatures through the weekend. Even though temperatures will likely not be record breaking, precautions should be taken during this period of time.

As the high pressure moves northward, expect the southwest upper level flow to persist, with surface winds remaining primarily onshore at least through Wednesday. Within this upper level southwest flow small perturbations within the flow are present. At this time, these perturbations are currently causing precipitation in central and northern California. High-resolution models such as the HRRR and the HRW ARW models are showing these perturbations following the southwesterly flow. As these perturbations move across the area, they will bring a slight chance of showers and thunderstorms to the Lane and Linn County Cascades Tuesday, Wednesday and Thursday. Thursday, the onshore surface winds will slowly weaken for inland locations becoming more north/northeast during the daytime Thursday and Friday. While an easterly wind event is not expected, the slacking winds will enable the warm 850 mb temperatures to mix down towards the surface. In addition expect night time cloud cover, which has been aiding in moderating temperatures, to diminish through Friday. The hottest days at this time are expected to be Thursday and Friday, the reason that it could be ether day is due to the very little chances currently seen in the models. Some locations could see the peak heat on Thursday while others could see it on Friday and vice versa. While daytime temperatures will be hot, overnight temperatures will drop into the lower to mid 60s, which will provide some respite from the daytime heat. There remains no precipitation chances across the majority of the CWA through this time period. /42

LONG TERM. Friday night through Monday . Saturday is expected to be the last day in this string of hot temperatures as the high pressure ridge axis anchored across The Great Basin starts to shift eastward and breakdown into the start of next week. As this breakdown occurs an upper level low from the Gulf of Alaska looks to push southeastward along the western Canadian coast line. This will bring a resurgence of onshore flow to the area and enable a cooling trend for the area. Given that the NBM, GFS, ECMWF and Canadian models and their ensembles all show this slight cooling trend, there is little reason to deviate from the NBM. Unfortunately, there continues to be no precipitation expected across the CWA through the start of next week. However, there could be a slight chance of showers and thunderstorms across the Lane and Linn County Cascades through the weekend but, overall confidence on the exact timing and coverage remains low. /42

AVIATION. High pressure over the area keeps much of the area dry and under southwesterly flow aloft. Northwesterly winds at the surface will continue through the forecast period with these evening gusts dissipating overnight. Mid-level moisture is beginning to filter into inland areas bringing some clouds around 4500-6000 ft. Will likely see these VFR clouds stretch north through the evening, reaching the Columbia River Gorge around 14Z Tuesday. There is a chance of broken MVFR cigs near KPDX/KTTD early Tue morning around 14Z to 16Z. Elsewhere inland, expecting VFR broken skies.

Upwelling has brought IFR to LIFR CIGs along the coast . especially the central Oregon coast near KONP. Those CIGs are expected to develop to the north where they should persist through the evening. With little mixing expected tomorrow, most likely will see IFR conditions around KONP through the next 24 hours, with some slight improvement to the north after 17Z Tuesday. Patchy fog also likely along the coast mainly south of KTMK.

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

KPDX AND APPROACHES . Mainly VFR conditions expected. Chance for shallow MVFR stratus to return early Tue morning for a couple hours around 14Z to 17Z. Breezy northwest diurnal winds will return after 20Z Tuesday. -Muessle/DDH

MARINE. Have expired the small craft advisory as wind speeds have fallen below criteria. May see some isolated gusts up to 25 kt in the central waters near the shore, but not expected to be widespread. -Muessle

Previous discussion follows: High pressure remains offshore with low pressure over SW Oregon and NW California. This will bring the typical northerly wind pattern over the next several days. Strongest winds likely through Monday evening. The pressure gradient is expected to weaken Tuesday and Wednesday with wind gusts generally up to around 20 kt. Northerly winds likely to increase again Thursday with winds gusting up to 25 kt through the end of the week. Seas will be wind wave dominated and choppy at 4-6 ft on top of a minimal south to southwest swell of 1. /DDH

PQR WATCHES/WARNINGS/ADVISORIES. OR . None. WA . None. PZ . None.



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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ASTO3 - 9439040 - Astoria, OR 21 mi84 min W 8 G 9.9 64°F 70°F1016.1 hPa
LOPW1 - 9440422 - Longview, WA 23 mi84 min 72°F1014.1 hPa
46243 - Clatsop Spit, OR - 162 40 mi58 min 53°F3 ft
TOKW1 - 9440910 - Toke Point, WA 47 mi84 min N 5.1 G 7 60°F 63°F1016.8 hPa

Wind History for Astoria, OR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Southwest Washington Regional Airport, WA26 mi58 minVar 410.00 miFair70°F59°F68%1015.1 hPa

Link to 5 minute data for KKLS

Wind History from KLS (wind in knots)
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Last 24hrNW5NW3Calm3N4N4N45NW4NW4N6N7N655NW46W7W7
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1 day ago54CalmNW3CalmCalmNE3N5NW4465W5654W8W85
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2 days ago3CalmCalmCalmN4N3NW3NW3CalmN44N7N7N10
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Tide / Current Tables for Knappa, Knappa Slough, Columbia River, Oregon
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Knappa
Click for Map
Tue -- 04:30 AM PDT     7.92 feet High Tide
Tue -- 05:50 AM PDT     Sunrise
Tue -- 09:50 AM PDT     Moonset
Tue -- 11:49 AM PDT     -0.76 feet Low Tide
Tue -- 05:45 PM PDT     7.37 feet High Tide
Tue -- 08:50 PM PDT     Sunset
Tue -- 11:12 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.93.25.16.87.87.875.63.82.10.6-0.5-0.701.83.85.87.17.36.85.64.32.91.9

Tide / Current Tables for Harrington Point, Columbia River, Washington
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Harrington Point
Click for Map
Tue -- 04:22 AM PDT     7.36 feet High Tide
Tue -- 05:50 AM PDT     Sunrise
Tue -- 09:50 AM PDT     Moonset
Tue -- 11:43 AM PDT     -1.08 feet Low Tide
Tue -- 05:37 PM PDT     6.80 feet High Tide
Tue -- 08:50 PM PDT     Sunset
Tue -- 11:13 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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23.356.57.37.26.34.93.11.50.1-0.9-1-0.21.63.65.46.66.76.25.13.92.71.9

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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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