Marine Weather and Tides
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
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.
|Sunrise 7:46AM||Sunset 4:58PM||Monday January 20, 2020 3:43 AM PST (11:43 UTC)||Moonrise 4:03AM||Moonset 1:26PM||Illumination 23%|
7 Day Forecast for Marine Location Near Onalaska, WAHourly EDIT Help
Area Discussion for - Seattle, WA  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS66 KSEW 200956 AFDSEW
Area Forecast Discussion National Weather Service Seattle WA 156 AM PST Mon Jan 20 2020
SYNOPSIS. A weak front will dissipate over the western portion of the area today. Additional systems will move through the region Tuesday through the rest of the week with lowland rain and fluctuating snow levels in the mountains.
SHORT TERM /TODAY THROUGH WEDNESDAY/. Rain ahead of a weakening cold front offshore has moved into the coastal areas this morning. Low level gradients increased Sunday evening with breezy east winds through the Cascade Gaps. Gradient will continue to weaken this morning with winds gradually easing. Wind advisory will be canned with morning package here shortly. The aforementioned front will dissipate as it slowly moves onshore later today, with rain being hard pressed to make it east of Puget Sound. Have nudged forecast to account for latest hi-res trends with heaviest amounts falling along the coast and into the Olympics. Elsewhere, most of the day may remain dry, but cloudy. Afternoon highs will top out in the mid 40s to near 50 degrees.
A stronger system then progged to move across the area Tuesday into Wednesday. Rain out of ahead of it should reach the coast late Monday evening, spreading inland throughout the day Tuesday. Models (and latest Storm Prediction Center outlook) continues to show a bit of instability offshore and near the immediate coast Tuesday morning into Tuesday afternoon. Have continued the slight chance for thunder in these areas. As cooler air moves in, snow levels initially around 3000-4000 feet will drop down to around 2500 feet during the day Tuesday with around 6-8 inches expected at pass levels by late Tuesday night. Those with travel plans across the Cascades should keep an eye on the forecast. Southerly winds will also pick up as the front moves through with breezy conditions through Wednesday morning.
LONG TERM /THURSDAY THROUGH SUNDAY/. Rest of the week into the weekend characterized by a continued active pattern and warmer air. Next warm front reaches the area late Wednesday into early Thursday with cold front following later Thursday into Friday. This will bring additional rain to the lowlands. Snow levels initially below pass levels Wednesday evening will rise steadily to above 4000-5000 feet by Thursday. Models have trended a bit wetter with this system so rising river levels are possible. For now, no flooding in the forecast but will need to monitor rivers off the Olympics like the flood-prone Skokomish. Additional systems likely past Friday into the weekend but details remain uncertain at this point.
AVIATION. Southwesterly flow aloft continuing into tonight before becoming more southerly by Tuesday morning. Surface flow remains east to southeasterly except for around KBLI . where surface flow remains from the northeast.
VFR conditions in place for the majority of the area . the lone exception being the SW interior /such as KOLM/ where fog has set up creating IFR to LIFR conditions. E to SE surface flow should help keep cigs up for most of the morning before a front approaching the coast will bring an increase in mid-level clouds to the area. Conditions expected to remain VFR even as this front breaks up without making much progress inland. Could see cigs get down to around 3000 ft along the coast late in the AM . and precip may allow for momentary dips down into MVFR. Coastal cigs will rebound in the afternoon to around 5000 ft. Aforementioned fog over the SW interior likely to linger into the late morning before dissipating. Until then . these locations likely to see cigs below 200 feet and visibility 1sm or less.
KSEA . High clouds this early AM with cigs dropping to around 6000 by 16Z. Cigs will not stray too much from that for the remainder of the TAF period. East southeast winds 10-15 knots with possible gusts to 20 knots this early morning Direction will not change. but speeds will ease around 15z to 5-10 kts. 18
MARINE. A frontal system will dissipate as it moves inland Monday. Small craft advisory winds confined to the Coastal Waters into Monday. A stronger Pacific frontal system may bring gales to the Coastal Waters Monday night As such. have gone ahead and upgraded inherited watch to a gale warning starting late tonight and continuing into Tuesday. The Strait and adjacent Northern Inland waters also look to hit SCA criteria and as such . will issue those headlines as well with AM forecast package. The flow will turn briefly onshore Tuesday night, then turn back offshore on Wednesday as the next warm front arrives. Felton/18
HYDROLOGY. Precipitation will remain light today. Slightly wetter system for Tuesday into Wednesday with snow levels around 2500 feet. No flooding concerns for this time period currently. Additional systems will arrive for the later half of the week into the weekend with higher snow levels and likely heavier precipitation leading to rising river levels. Will continue to monitor trends and river forecasts going forward.
SEW WATCHES/WARNINGS/ADVISORIES. WA . None.
PZ . Small Craft Advisory until 6 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.
Gale Warning from 10 PM this evening to 6 AM PST Tuesday 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 2 AM PST early this morning for Grays Harbor Bar.
Small Craft Advisory from 10 AM this morning to 10 AM PST Tuesday for Grays Harbor Bar.
Small Craft Advisory from 10 PM this evening to 10 AM PST Tuesday for Central U.S. Waters Strait Of Juan De Fuca-East Entrance U.S. Waters Strait Of Juan De Fuca-Northern Inland Waters Including The San Juan Islands-West Entrance U.S. Waters Strait Of Juan De Fuca.
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|
|LOPW1 - 9440422 - Longview, WA||33 mi||62 min||43°F||1015.7 hPa|
|TCMW1 - 9446482 - Tacoma Met, WA||54 mi||56 min||SSW 1.9 G 5.1|
|TCNW1 - 9446484 - Tacoma, WA||54 mi||62 min||42°F||49°F||1015.1 hPa|
Wind History for Longview, WA(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.
|Chehalis-Centralia Airport, WA||22 mi||49 min||W 3||10.00 mi||Mostly Cloudy||43°F||42°F||100%||1014.9 hPa|
Link to 5 minute data for KCLS
Wind History from CLS (wind in knots)
|1 day ago||S|
|2 days ago||Calm||Calm||Calm||Calm||Calm||S||S||SW||S||S||S||S|
EDIT Weekend mode (on/off) (on/off)  Help One Week of Data
EDIT (on/off)  Help One Week of Data
Weather Map(on/off)  Help Weather Map
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 (6,6,7,8)(on/off)  Help
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