Marine Weather and Tides
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
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|Sunrise 6:44AM||Sunset 7:23PM||Sunday September 15, 2019 5:09 PM PDT (00:09 UTC)||Moonrise 7:27PM||Moonset 7:03AM||Illumination 97%|
7 Day Forecast for Marine Location Near Hunts Point, WAHourly EDIT Help
Area Discussion for - Seattle, WA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus66 ksew 152216|
area forecast discussion
national weather service seattle wa
316 pm pdt Sun sep 15 2019
Synopsis Scattered showers will continue in a post-frontal
environment through much of Monday. Isolated lightning will be
possible across the area Monday afternoon evening with these
showers. Another organized cold front will bring widespread rain
to the area Tuesday, with scattered showers following again into
Wednesday. After a brief break Thursday, a few showers will be
possible Friday. Another front may approach during the weekend.
Short term tonight through Wednesday A deep broad upper
trough is in place roughly from bc into the far eastern pacific
and into the pacific northwest this afternoon. Downstream from
this feature exists a broad ridge of high pressure encompassing
much of the remaining conus, with stronger westerlies jet across
the canadian prairies into the northeast us. At the surface, a
seasonably strong cold front was progressing eastward across the
pacnw, with broad high pressure across the majority of the conus
east of the rockies.
The aforementioned cold front has pushed east of the cascade crest
this afternoon, with the more widespread rain shield yielding more
of a scattered shower regime. This will be the rule through the
evening hours as skies remain generally overcast. 24 hour rainfall
totals remain highest across the olympics and cascades, where over
2 inches of rain has fallen. Elsewhere across the lowlands,
generally anywhere from 0.25-0.75 inches is a good average.
Through the day on Monday, scattered showers will continue across
western washington, with the deep upper trough axis gradually
moving overtop the area. Model guidance suggest 500mb temps will
drop to between -20c and -22c, indicative of a decent cold air
pocket associated with the trough. As such, 700-500mb lapse rates
could easily approach 7c km, making for an unstable post-frontal
environment. Although progged instability values are generally
low, especially sfc based, feel there will be a chance for a few
lightning strikes across the area Monday afternoon and evening.
Spc day 2 outlook also shows this potential, so while very low,
have put mention of this in the forecast. Should a thunderstorm
develop, moderate to locally brief heavier rainfall will be
possible, perhaps with a few graupel pellets mixed in. There may
be very brief pause in the weather action Monday night before the
next organized cold front approaches.
Cold frontal timing and strength are depicted similarly in the
guidance, with the front moving across western washington through
the morning and into the afternoon on Tuesday, carrying with it
widespread rainfall similar to what was experienced today. In
addition, winds look a bit breezier with this system, with progged
850mb winds in the 30-40kt range. Be sure to reference the marine
section as this will have implications across the waters.
Widespread rain will transition to showers late Tuesday through
Long term Thursday through Sunday An east-west oriented|
shortwave ridge will pass by the local area Wednesday night into
Thursday. This is expected to allow for height rises and a brief
respite from the rainy weather systems. Nevertheless, a weak
shortwave embedded within the flow will bring some moisture into
the area late in the day. The shortwave will continue to move
south across the area on Friday. It appears possible a few
showers may accompany this wave, tho coverage is fairly low
confidence at this point.
A dry day may then materialize for most of Saturday, tho guidance
suggests the next front may move in from the north late Saturday
into early Sunday. This could provide yet another period of
widespread rain. Will monitor the evolution of this system in the
Aviation Steady rain has become more showery behind a surface
front that exited the area today. Southwesterly flow aloft this
evening will become light and variable as an upper trough moves over
the area Monday. Light to moderate onshore surface flow will
continue tonight and Monday. The air mass is moist and slightly
unstable. Ceilings are generallyVFR with some MVFR areas in the
north interior. Conditions will likely become MVFR later tonight at
most terminals, then improve significantly Monday afternoon.
Ksea... CurrentlyVFR with ceilings 3-4k ft and likely to remain
vfr into the evening. MVFR ceilings will return overnight, with
visibility restrictions in fog possible as well.VFR Monday
afternoon. Southerly winds 6-12 kt, easing late tonight. Chb
Marine Small craft advisory southerly winds will keep going until
5 pm or so over the east entrance and northern inland waters. Winds
and seas will ease tonight into Monday. Another strong system will
arrive Tuesday, with possible gale force southerlies over the
coastal and parts of the interior waters. A gale watch is in effect
for Tuesday. Winds will ease again Wednesday and Thursday. Chb
Hydrology The daily hydrology discussion has ended until the
start of the next rainy season; it will only be updated as needed
Sew watches warnings advisories
Pz... Gale watch from late Monday night through Tuesday afternoon 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-east entrance u.S.
Waters strait of juan de fuca-northern inland waters
including the san juan islands.
Small craft advisory until 5 pm pdt this afternoon for east
entrance u.S. Waters strait of juan de fuca-northern inland
waters including the san juan islands.
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|WPOW1 - West Point, WA||9 mi||70 min||S 17 G 19||58°F||1007 hPa (+0.0)||56°F|
|46120||11 mi||47 min||S 5.8||59°F||1006 hPa||55°F|
|46125||26 mi||41 min||9.7||59°F||1005.6 hPa||55°F|
|TCMW1 - 9446482 - Tacoma Met, WA||27 mi||58 min||S 6 G 9.9|
|TCNW1 - 9446484 - Tacoma, WA||28 mi||58 min||62°F||56°F||1007.8 hPa|
|46121||36 mi||43 min||61°F||1007.2 hPa||57°F|
|PTWW1 - 9444900 - Port Townsend, WA||41 mi||58 min||E 7 G 8.9||60°F||53°F||1006.9 hPa|
Wind History for Seattle, Puget Sound, WA, WA(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.
|Boeing Field - King County International Airport, WA||9 mi||17 min||S 7||10.00 mi||Partly Cloudy||62°F||55°F||78%||1007.2 hPa|
|Renton Municipal Airport, WA||11 mi||17 min||S 6||4.00 mi||Partly Cloudy with Haze||63°F||55°F||76%||1007.8 hPa|
|Seattle, Seattle-Tacoma International Airport, WA||15 mi||17 min||SSW 8||10.00 mi||Overcast||61°F||54°F||78%||1008 hPa|
|Everett Snohomish County, WA||18 mi||17 min||S 6||10.00 mi||Overcast||59°F||55°F||87%||1007.5 hPa|
Link to 5 minute data for KBFI
Wind History from BFI (wind in knots)
|1 day ago||S||S||S||S||S|
|2 days ago||SW||S||SW||S||S||S||S||S||S||S||S||S||S||S||S|
EDIT Weekend mode (on/off) (on/off)  Help One Week of Data
EDIT (on/off)  Help One Week of Data
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GEOS Local Image of PacificNorthwest EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Seattle, WA (20,4,5,8)(on/off)  Help
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