Thursday, September23, 2021
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Marine Weather and Tides
Maple Falls, 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 6:56AMSunset 7:06PM Thursday September 23, 2021 8:54 PM PDT (03:54 UTC) Moonrise 7:25PMMoonset 8:45AM Illumination 92% Phase: Waning Gibbous; Moon at 17 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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PZZ133 Northern Inland Waters Including The San Juan Islands- 835 Pm Pdt Thu Sep 23 2021
Tonight..NW wind to 10 kt. Wind waves 1 ft or less.
Fri..N wind to 10 kt becoming nw 5 to 15 kt in the afternoon. Wind waves 2 ft or less.
Fri night..W wind to 10 kt. Wind waves 1 ft or less.
Sat..NW wind 5 to 15 kt becoming sw in the afternoon. Wind waves 2 ft or less.
Sat night..S wind 5 to 15 kt. Wind waves 2 ft or less.
Sun..SE wind to 10 kt. Wind waves 1 ft.
Sun night..SE wind 5 to 15 kt. Wind waves 2 ft.
Mon..S wind 5 to 15 kt. Wind waves 2 ft.
Tue..S wind to 10 kt. Wind waves 1 ft.
PZZ100 835 Pm Pdt Thu Sep 23 2021
Synopsis for the northern and central washington coastal and inland waters..Low level flow will turn briefly offshore tonight and Friday morning before turning back onshore Friday afternoon. Onshore flow will then continue through Saturday. A front will move through the waters Sunday with another potentially stronger front slated to move through the region on Monday.


7 Day Forecast for Marine Location Near Maple Falls, WA
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location: 48.84, -122.13     debug


Area Discussion for - Seattle, WA
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FXUS66 KSEW 240337 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 837 PM PDT Thu Sep 23 2021

UPDATE. No changes were needed to the forecast this evening-the forecast is right on track.

A mid and upper level ridge axis will move over the Pacific Northwest overnight tonight and into Friday morning, allowing for large scale subsidence and clear skies (this will lead to the development of some morning fog in the typical locations). In the lower levels, a thermally-induced trough of low pressure will develop northward along the WA/OR Coast from California early Friday morning. This will allow for a temporary shift to offshore flow that will then continue through much of the day. Overall, this will allow for a pleasant day with high temps climbing into the 70s for many locations.

With these features in mind, a shortwave trough is forecast to approach the Coastal Waters by Friday afternoon before then pushing across the area Friday evening and Friday night. The absence of moisture will allow for only the passage of some higher level clouds late in the day, although height falls will ensue.

Previous discussion included below with an updated marine and aviation section.

Kovacik

PREV DISCUSSION. /issued 328 PM PDT Thu Sep 23 2021/

SYNOPSIS. High pressure building into the region will bring dry and warmer conditions to the region into Saturday. A weak frontal system will spread some light rain into the area by early Sunday. A stronger system will bring widespread rain and breezy conditions to Western Washington on Monday with cool and unsettled conditions persisting through the middle of next week.

SHORT TERM /TONIGHT THROUGH SUNDAY/. An upper ridge continues to build into Western Washington this afternoon. The air mass is gradually drying as northerly flow near the surface increases. Skies will be mostly clear from the coast to the Cascades tonight and Friday as the upper ridge axis moves over Western Washington and the low level flow turns offshore. The combination of strong ridging aloft and thermally induced low pressure near the coast will contribute to a nice warm up on Friday with highs from the upper 60s coast to near 80 in the Southwest Interior.

The ridge weakens and shifts eastward Friday night and Saturday as a broad upper trough takes up residence over the northeast Pacific. Interior areas should see another pleasant day with seasonable temperatures while coastal areas see more in the way of clouds and cooler temperatures as onshore flow resumes. A weak front approaching the region could spread a few showers to the north coast by Saturday night. Rain chances will increase through the day on Sunday across the area as the first in a series of systems affects the region. QPF with the first system will be relatively light. But it will open the door to what looks like a rather unsettled first full week of autumn.

LONG TERM /MONDAY THROUGH THURSDAY/. Quick on the heels of Sunday's frontal system, a broad upper trough offshore will push another front through Western Washington on Monday. Model ensembles are in relative agreement with this system being more potent with widespread QPF of a half inch of more for the lowlands and breezy to windy conditions. Perhaps more noteworthy, the upper trough trailing the front will usher in a cooler, showery air mass with snow levels down to as low as 5000 feet. As with many post-frontal air masses, the cooler air aloft will lead to some instability that could generate isolated thunderstorm activity . much like what we saw last weekend.

Model ensembles are in good agreement that long wave ridging will park itself over the midsection of the country by the middle of next week. This places the mean trough position just offshore and keeps the door open for additional frontal systems to impact the area well into the extended forecast period. 27

AVIATION. An upper level ridge offshore will gradually flatten across the region into Friday morning, allowing for northwesterly flow aloft to gradually become more zonal by the morning hours. Flow aloft will then transition more southwesterly through the day Friday as upper level troughing develops across the northeastern Pacific and the upper ridge moves inland. In the lower levels, flow will gradually transition to more offshore tonight and persist into Friday morning. Current conditions remain VFR across the region this evening, with mostly clear skies expected to continue into Friday morning. A few areas of patchy fog will be possible across the region on Friday morning, primarily for terminals KOLM, KPWT, KHQM.

KSEA . VFR cigs likely to continue throughout the rest of the evening and overnight hours. Surface winds remain out of the north at 8 knots or less. Kept mention in the TAF for the possibility of some lower visibility and mist between 12-15Z, but the trend favors minimal impact of mist/patchy fog to the terminal into tomorrow morning.

Kristell/Borth

MARINE. Low level flow will turn briefly offshore tonight and Friday morning before turning back onshore by Friday afternoon. Northerly winds expected over the coastal waters until Saturday afternoon before becoming south to southwesterly again. Onshore flow continuing on Saturday. A front will move through the waters Sunday with another possibly more vigorous front Monday.

Small craft advisory winds possible over most of the waters Sunday and Monday with the frontal passages. Swells along the coast by late Monday could be as high as 15-17 feet associated with the stronger frontal system.

Kristell/Borth

SEW WATCHES/WARNINGS/ADVISORIES. WA . None. PZ . None.

www.weather.gov/seattle


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PBFW1 - Padilla Bay Reserve, WA 32 mi84 min N 7 57°F 1024 hPa54°F
CHYW1 - 9449424 - Cherry Point, WA 33 mi54 min 1025.2 hPa (-0.9)
CPNW1 33 mi54 min E 1.9 G 2.9 56°F
FRDW1 - 9449880 - Friday Harbor, WA 51 mi138 min Calm G 1.9 60°F 51°F1025.3 hPa

Wind History for Cherry Point South Dock, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Bellingham, Bellingham International Airport, WA22 mi61 minN 010.00 miFair55°F54°F96%1025.4 hPa

Link to 5 minute data for KBLI

Wind History from BLI (wind in knots)
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Last 24hrS5S5S4S6S6S3S5S3CalmS4S4S35S7S536SW3W655W5CalmCalm
1 day agoCalmCalmCalmCalmCalmCalmCalmCalmS4CalmCalmCalmSW4W5S4W43S7S7S7S5S7S6S4
2 days agoCalmCalmCalmCalmN4N3CalmN3CalmCalmCalmN3NE3NE6CalmN4NW4NW4N5--NW5--CalmCalm

Tide / Current Tables for Bellingham, Washington (3)
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Bellingham
Click for Map
Thu -- 01:11 AM PDT     1.43 feet Low Tide
Thu -- 06:58 AM PDT     Sunrise
Thu -- 07:26 AM PDT     7.00 feet High Tide
Thu -- 09:47 AM PDT     Moonset
Thu -- 01:20 PM PDT     2.81 feet Low Tide
Thu -- 07:04 PM PDT     Sunset
Thu -- 07:07 PM PDT     7.42 feet High Tide
Thu -- 08:25 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.91.41.72.63.85.16.26.96.96.35.34.23.32.833.74.85.96.97.47.26.34.93.3

Tide / Current Tables for Bellingham, Washington (2)
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Bellingham
Click for Map
Thu -- 01:15 AM PDT     0.67 meters Low Tide
Thu -- 06:58 AM PDT     Sunrise
Thu -- 07:30 AM PDT     2.22 meters High Tide
Thu -- 09:47 AM PDT     Moonset
Thu -- 01:07 PM PDT     1.06 meters Low Tide
Thu -- 07:05 PM PDT     Sunset
Thu -- 07:09 PM PDT     2.44 meters High Tide
Thu -- 08:25 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.70.711.31.722.22.221.71.41.21.11.11.41.722.32.42.42.11.71.3

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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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