Sunrise 5:37 AM   Sunset 8:49 PM Moonrise 5:56 AM   Moonset 11:49 PM

  Print   HELP   Reset   Save   Recall  New

PZZ130 West Entrance U.s. Waters Strait Of Juan De Fuca- 203 Am Pdt Fri May 10 2024
Today - E wind to 10 kt. Wind waves 1 to 2 ft. W swell 3 ft at 11 seconds. Tonight - NW wind to 10 kt in the evening becoming light. Wind waves 1 to 2 ft. W swell 4 ft at 11 seconds. Sat - NW wind to 10 kt. Wind waves 1 to 3 ft. W swell 4 ft at 10 seconds. Sat night - W wind 5 to 15 kt. Wind waves 2 to 3 ft. W swell 5 ft at 10 seconds. Sun - W wind to 10 kt rising to 15 to 25 kt in the afternoon. Wind waves 2 ft building to 3 to 5 ft in the afternoon. W swell 4 ft at 9 seconds. Sun night - W wind 15 to 25 kt easing to 5 to 15 kt after midnight. Wind waves 3 to 5 ft subsiding to 2 to 3 ft after midnight. W swell 4 ft at 9 seconds and W 3 ft at 13 seconds. Mon - W wind 5 to 15 kt. Wind waves 2 to 3 ft. W swell 5 ft. Tue - W wind 5 to 15 kt. Wind waves 1 to 2 ft building to 3 to 4 ft. W swell 5 ft.

PZZ100 203 Am Pdt Fri May 10 2024
Synopsis for the northern and central washington coastal and inland waters - High pressure will continue to build off the coast through Saturday. Thermally induced low pressure will shift over the inland waters Friday and east of the cascades Saturday, returning onshore flow. Gusty winds will be possible with a bypassing trough to the north Saturday into Sunday.

FXUS66 KSEW 101017 AFDSEW

Area Forecast Discussion National Weather Service Seattle WA 317 AM PDT Fri May 10 2024

SYNOPSIS
Upper level ridge over Western Washington today with low level offshore flow. The ridge will weaken Saturday with the low level flow turning onshore. Ridge moving south Sunday with a weak system moving through the area late Sunday into Monday. Ridge rebuilding Tuesday. Unsettled weather possible for the middle of next week.

SHORT TERM /TODAY THROUGH SUNDAY/
Satellite imagery shows clear skies over Western Washington early this morning. Wide variety of temperatures with locations with exposure to easterly winds in the mid and upper 50s while locations with calm winds are in the mid 40s to lower 50s.

Warming trend continuing today with an upper level ridge over the area. Surface gradients offshore but not very strongly with the cross cascade gradient near 0. Temperatures aloft warming today with 850 mb temperatures in the plus 14 to 16C range by late this afternoon. Winds at 850 and 700 mb light easterly all day. High temperatures warming 5 to 10 degrees in most locations putting highs in the 70s to mid 80s inland and upper 70s to mid 80s along the coast. Northerlies picking up over the Puget Sound this afternoon will knock a couple of degrees off the highs near water.

Subtle changes in the pattern tonight. Offshore gradients weaken with cross cascade gradient going positive overnight. The weakening easterlies overnight will give the area more uniform low temperatures, in the lower to mid 50s.

Saturday remaining warm for the interior. The question is how warm? Is it a fake out day, winds turn onshore but not early enough and highs are a little warmer than the day before, or the the onshore flow get inland enough to bring a round of slight cooling to the interior. Going with the latter this morning. In addition to the low level flow turning onshore Saturday the ridge aloft weakens ( 850 mb temperatures cool a couple of degrees to the plus 12 to 14C range ) and the winds at 850 and 700 mb are westerly from the get go. Still going to be a warm day with highs over the interior in the lower 70s to lower 80s. With onshore flow all day the coast will be much cooler, highs in the 60s.

Upper level ridge continues to weaken Saturday night into Sunday with a weak shortwave approaching the area by late Sunday afternoon. Low level onshore flow increasing Saturday night into Sunday. Stratus along the coast Saturday night moving inland Sunday morning stopping just short of the Puget Sound. After lows in the mid 40s to lower 50s highs Sunday much cooler over the interior with 60s and lower 70s. Highs along the coast only in the lower 60s.

LONG TERM /MONDAY THROUGH THURSDAY/
Weak shortwave moving through Sunday night into Monday. Shower chances with this feature confined mostly to the mountains. Under mostly cloudy skies high temperatures will cool back to a little below normal, in the upper 50s to mid 60s.

Upper level ridge rebuilding Tuesday. Onshore gradients becoming northerly in the afternoon. With more sunshine highs warming into the 60s and lower 70s.

Confidence beyond Tuesday very low. Model blend has chance pops over the area beginning Tuesday night and continuing through Thursday. The operational GFS builds an upper level ridge over the area Wednesday and Thursday. The ECMWF also has a ridge for Wednesday with the ridge breaking down Thursday as a front approaches from the northwest. Ensembles in good agreement with the operational runs Tuesday night and Wednesday with only a couple of the ensemble solutions wet. The GFS ensembles remain completely dry Thursday while the ECMWF ensembles are split between wet and dry solutions. Took the chance pops out of the Tuesday night forecast. Will leave the blend slight chance pops in for Wednesday and Thursday for now. If the signal from the ensembles is as strong as tonight look for the pops to get taken out of the Wednesday forecast. The inconsistency with the pops extends to the temperatures as well. Both Wednesday and Thursday the likely high temperature ranges are over 20 degrees for Seattle. Given the ensemble solutions will lean the high temperatures a little above normal instead of going with just climatology with 60s and lower 70s Wednesday and Thursday. Felton

AVIATION
Offshore flow will continue aloft and down to the surface Friday for western Washington as a high over the Pacific peaks in intensity Friday. It will weaken going into the weekend.
For Friday, another day of mostly clear/VFR skies with potential for a couple brief patchy fog/mist areas this morning (though the chance is low - would affect Snohomish and Chehalis River Valleys). Surface winds will peak this afternoon at 4 to 8 kt (with gusts to 15 kt possible near waterways), becoming light and variable tonight.

KSEA...Continuation of clear skies expected this forecast period with a few high clouds. North winds 4 to 8 kt with a couple gusts to 15 kt possible this afternoon, before diminishing this evening.

HPR

MARINE
High pressure/thermal trough over the Pacific waters/coast will shift inland today/Saturday. As it breaks down, offshore flow on Friday will revert to onshore flow Saturday. Winds for Friday remain light with a mix of offshore/northerly winds. Couple gusts to 15 kt are possible in the Strait of Juan de Fuca/Puget Sound/Outer Coastal Waters. A trough to the north in Canada will send a push down the coastal waters and Strait of Juan de Fuca. With gales possible in the Central/East Strait, a gale watch was issued from Saturday afternoon through first part of Monday. Expect the onshore pattern to continue into next week.

Seas will generally range 5 to 7 feet into Saturday, briefly building to 8 to 9 feet for the outer Coastal Waters over the Saturday into Sunday.

HPR

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
WA...None.
PZ...Gale Watch from Saturday afternoon through Monday morning for Central U.S. Waters Strait Of Juan De Fuca-East Entrance U.S. Waters Strait Of Juan De Fuca.

Pocahontas Point
Click for Map
Fri -- 02:05 AM PDT     3.56 meters High Tide
Fri -- 05:43 AM PDT     Sunrise
Fri -- 07:00 AM PDT     Moonrise
Fri -- 09:02 AM PDT     -0.05 meters Low Tide
Fri -- 03:35 PM PDT     2.71 meters High Tide
Fri -- 08:43 PM PDT     1.35 meters Low Tide
Fri -- 08:49 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION

Pocahontas Point, British Columbia, Tide feet

Brooksby Point
Click for Map
Fri -- 02:10 AM PDT     3.55 meters High Tide
Fri -- 05:43 AM PDT     Sunrise
Fri -- 07:01 AM PDT     Moonrise
Fri -- 09:08 AM PDT     -0.01 meters Low Tide
Fri -- 03:45 PM PDT     2.68 meters High Tide
Fri -- 08:48 PM PDT     1.37 meters Low Tide
Fri -- 08:49 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION

Brooksby Point, British Columbia, Tide feet

Full Color Weather Map

Link to Loop


Other links: GEOS-West     Contential US     Full GOES-East

Seattle/Tacoma, WA,