Tuesday, March2, 2021
Privacy Policy
L-36.com

Marine Weather and Tides
Mercer Island, 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 6:44AMSunset 5:57PM Tuesday March 2, 2021 5:33 PM PST (01:33 UTC) Moonrise 10:30PMMoonset 8:42AM Illumination 81% Phase: Waning Gibbous; Moon at 19 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
    EDIT      (on/off)   Help
PZZ135 Puget Sound And Hood Canal- 224 Pm Pst Tue Mar 2 2021
Tonight..Variable wind to 10 kt becoming S 5 to 15 kt after midnight. Wind waves 2 ft or less.
Wed..S wind 5 to 15 kt easing to 10 kt in the afternoon. Wind waves 2 ft or less.
Wed night..Light wind. Wind waves less than 1 ft.
Thu..S wind to 10 kt becoming 5 to 15 kt in the afternoon. Wind waves 2 ft or less.
Thu night..S wind 5 to 15 kt. Wind waves 2 ft or less.
Fri..S wind to 10 kt becoming 5 to 15 kt in the afternoon. Wind waves 2 ft or less.
Fri night..S wind to 10 kt in the evening becoming light. Wind waves 1 ft or less.
Sat..Light wind becoming S to 10 kt. Wind waves less than 1 ft becoming 1 ft or less.
Sun..S wind to 10 kt. Wind waves 1 ft or less.
PZZ100 224 Pm Pst Tue Mar 2 2021
Synopsis for the northern and central washington coastal and inland waters..Weak high pressure will build over the waters through early Wednesday. A warm front will brush the area later on Wednesday. A vigorous cold front will arrive Thursday or Friday.


7 Day Forecast for Marine Location Near Mercer Island, WA
   Hourly   EDIT   Help
location: 47.54, -122.26     debug


Area Discussion for - Seattle, WA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS66 KSEW 022333 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 333 PM PST Tue Mar 2 2021

SYNOPSIS. Mostly dry and warmer conditions across the region through Thursday as quasi-zonal flow gives way to high pressure aloft. A pattern change late Thursday will see a return of wet weather to Western Washington Friday through the first half of next week.

SHORT TERM /TONIGHT THROUGH THURSDAY/. Ongoing showers associated with the remnants of this mornings convergence zone are trending down this afternoon, with only isolated showers remaining across Admiralty Inlet and portions of Snohomish County at this hour. Visible satellite imagery shows some breaks in the clouds beneath the thin, broken upper level cloud layer, allowing for some moments of sun. Less low level cloud cover is being observed at this hour from Tacoma southward and westward, where low level clouds have mostly mixed out this afternoon and influence from convergence are non-existent. Dry conditions will prevail tonight under mostly cloudy skies.

A large upper level low embedded in the southern flank of the polar jet will eject across Southern California tonight and into the Great Basin by Wednesday night/early Thursday. This, coupled with an approaching upper level low ejecting out of the Gulf of Alaska will amplify the NW to SE oriented ridge, with the ridge axis likely oriented east of Western Washington. While we are expecting warming temperatures, this will be a limiting factor in how warm we will get on Wednesday and Thursday. While 60 degrees F is not out of the question on Thursday, timing of the onset of clouds and rain will be a factor. An onset of clouds and rain earlier on Thursday will preclude warming, while clouds and rain moving into the region later in the afternoon will likely allow readings to hit the 60 degree mark for the second time this week in some areas and for the first time this year in others. With a deepening upper level low tapping into a large fetch of Pacific moisture approaching the coast Thursday night, a shift from quiet and mild weather is expected, as increasing winds along the outer coast and rain are expected to impact the region Friday through the weekend.

LONG TERM /FRIDAY THROUGH TUESDAY/. There remains some variance in ensemble guidance regarding exactly where the bulk of the upper level energy will impact the coast. There remains a signal in the upper level ensemble guidance in a secondary upper level shortwave trough ejecting southeastward out of the parent low and into the southern OR/NorCal coast late Friday/Saturday. That said, confidence is increasing in a weak AR event setting up from southwest to northeast along the northwest coast Friday and Saturday. That said, there are several factors that will preclude widespread flooding with this particular AR setup:

1) Snow levels: These will only rise to ~4000-5000 feet at the most across the region, cutting down the rainfall efficiency.

2) Progressive storm pattern: The AR will only remain pointed at the Olympic Peninsula for roughly 24 to 36 hours before the upper low pushes the moisture eastward.

These factors will limit rainfall amounts and snowmelt runoff through this event. There is reasonable confidence in at least 1 to 2 inches of rainfall from Thursday night through Saturday, with slightly higher amounts in the Olympics. As a result, flooding potential will likely be limited to the Skokomish River basin, with lower potential for urban flooding due to less intense rainfall rates. Aside from rain, breezy southerly winds are expected along the coast through Friday evening.

Active weather will persist through the remainder of the period as another system will eject out of the Gulf of Alaska on Sunday, bringing another round of wet and active weather to the region through the end of the period. It is important to note that there is a wide range of solutions regarding the strength and location of this system which will affect the finer details of the resultant weather. The bottom line is, expect unsettled weather to persist from this weekend through at least the first half of next week.

Pullin

AVIATION. Westerly flow aloft. Light low-level flow will become southerly on Wed. The air mass is stable and fairly moist. The mountains are partly to mostly obscured especially in the central Cascades. Areas of stratus finally broke up this afternoon but will set back up to some degree overnight. Mid and high clouds will cross the area at times as well.

KSEA . Nice to see the PSCZ give up and the filtered sunshine this afternoon. Some clouds will set back up overnight but we should be done with the low cigs and drizzle.

19

MARINE. Weak high pressure builds over the area but a warm front will brush the area later on Wednesday. A stronger front will arrive Thursday or Friday with southerly gales possible across the coastal waters and portions of the inland waters. Coastal swell will ease a bit but then build right back up again for the end of the week.

19

HYDROLOGY. An atmospheric river is expected to affect Western Washington late Thursday night through Saturday. At this time, several limiting factors will keep the flood threat isolated to the Skokomish River basin during this timeframe.

1) Snow levels will only rise to 4000 to 5000 feet across the Olympic Peninsula, limiting rainfall efficiency.

2) Event duration. The AR will remain pointed at the Olympic Peninsula for ~24-36 hours at the most. Rainfall amounts will generally range from 1 to 2 inches across most locations, with higher amounts to 3 inches in the higher elevations of the Olympics.

These factors coupled with a mostly dry week will limit the flooding potential across the region. An additional system will bring additional rainfall to Western Washington Sunday through early next week.

Pullin

SEW WATCHES/WARNINGS/ADVISORIES. WA . None. PZ . Small Craft Advisory until 10 PM PST this evening for Coastal Waters From Cape Flattery To James Island 10 To 60 Nm- Coastal Waters From Cape Flattery To James Island Out 10 Nm- Coastal Waters From James Island To Point Grenville 10 To 60 Nm-Coastal Waters From James Island To Point Grenville Out 10 Nm-Coastal Waters From Point Grenville To Cape Shoalwater 10 To 60 Nm-Coastal Waters From Point Grenville To Cape Shoalwater Out 10 Nm.

Small Craft Advisory until 8 AM PST Wednesday for Grays Harbor Bar.



www.weather.gov/seattle


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map

Wind History for Seattle, Puget Sound, WA, WA
(wind in knots)    EDIT      (on/off)   Help
Last
24hr
1 day
ago
2 days
ago

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boeing Field - King County International Airport, WA2 mi40 minNE 410.00 miOvercast47°F35°F63%1015 hPa
Renton Municipal Airport, WA3 mi40 minNNW 410.00 miFair46°F36°F68%1015.5 hPa
Seattle, Seattle-Tacoma International Airport, WA7 mi40 minN 010.00 miMostly Cloudy48°F33°F56%1015.5 hPa

Link to 5 minute data for KBFI

Wind History from BFI (wind in knots)
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
Last 24hrS6W4CalmCalmCalmCalmS3CalmCalm4CalmCalmW3NE43Calm343Calm3E3NE3NE4
1 day agoS5S4SW4SE4SE6S6SE3SE3S3SE4SE6SE5S4CalmS4CalmSE3SW3SE7S8SW6S6S5S5
2 days agoS3SW5S5S6S55S7SE7SE7SE8SE9SE7SE6S8S9SE9S9S10S8S8S8S9S74

Tide / Current Tables for Duwamish Waterway, Washington
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Duwamish Waterway
Click for Map
Tue -- 12:40 AM PST     1.28 feet Low Tide
Tue -- 06:47 AM PST     Sunrise
Tue -- 06:53 AM PST     12.07 feet High Tide
Tue -- 08:41 AM PST     Moonset
Tue -- 01:27 PM PST     1.59 feet Low Tide
Tue -- 05:56 PM PST     Sunset
Tue -- 07:21 PM PST     10.12 feet High Tide
Tue -- 10:31 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
1.61.42.54.77.49.811.512.111.49.77.552.91.71.83.15.17.39.110.19.98.97.35.4

Tide / Current Tables for Restoration Point, 0.6 miles ESE of, Washington Current
   EDIT      (on/off)   Help   One Week of Data
Restoration Point
Click for Map
Tue -- 01:29 AM PST     0.00 knots Slack
Tue -- 03:41 AM PST     0.70 knots Max Flood
Tue -- 06:47 AM PST     Sunrise
Tue -- 07:07 AM PST     -0.00 knots Slack
Tue -- 08:42 AM PST     Moonset
Tue -- 10:34 AM PST     -1.01 knots Max Ebb
Tue -- 02:18 PM PST     0.00 knots Slack
Tue -- 04:18 PM PST     0.60 knots Max Flood
Tue -- 05:56 PM PST     Sunset
Tue -- 07:40 PM PST     -0.00 knots Slack
Tue -- 10:31 PM PST     Moonrise
Tue -- 10:51 PM PST     -0.79 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
-0.6-0.20.30.60.70.60.40-0.4-0.8-1-1-0.8-0.5-0.10.30.60.60.40.2-0.1-0.5-0.7-0.8

Weather Map
       (on/off)   Help Weather Map
wmap_P
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.
Link to Loop

Other links: GEOS-West     Contential US     Full GOES-East
Ground Weather Radar Station




Please read website Cookie, Privacy, and Disclamers by clicking HERE.