Sunrise 5:31 AM   Sunset 8:25 PM Moonrise 5:13 AM   Moonset 10:11 PM

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PZZ135 Puget Sound And Hood Canal- 208 Pm Pdt Thu May 9 2024
Tonight - N wind 5 to 15 kt easing to 10 kt after midnight. Wind waves 2 ft or less. Fri - N wind 5 to 15 kt. Wind waves 2 ft or less. Fri night - N wind 5 to 15 kt easing to 10 kt after midnight. Wind waves 2 ft or less. Sat - N wind to 10 kt becoming nw in the afternoon. Wind waves 1 ft or less. Sat night - NW wind to 10 kt. Wind waves 1 ft or less. Sun - SW wind 5 to 15 kt. Wind waves 2 ft or less. Sun night - NW wind 5 to 15 kt becoming S to 10 kt after midnight. Wind waves 2 ft or less. Mon - S wind to 10 kt becoming nw. Wind waves 1 ft or less. Tue - Light wind becoming N to 10 kt. Wind waves less than 1 ft becoming 1 ft or less.

PZZ100 208 Pm Pdt Thu May 9 2024
Synopsis for the northern and central washington coastal and inland waters - High pressure will continue to build off the coast today through the end of the week. Thermally induced low pressure moving up the coast Thursday will shift over the inland waters Friday and east of the cascades Saturday.

FXUS66 KPDT 092355 AAA AFDPDT

Area Forecast Discussion...UPDATED AVIATION.
National Weather Service Pendleton OR 455 PM PDT Thu May 9 2024

SHORT TERM
Tonight through Saturday night...A large ridge of high pressure will build over the Pacific Northwest through Saturday.
This ridge will flatten a bit through Saturday night. Dry and increasingly warm conditions are expected through the weekend. High temperatures will be 15 to 20 degrees above normal on Saturday, on average across the area.

Probabilities of high temperatures >=90 degrees on Saturday range from about 60% in the lower Columbia Basin of Oregon to about 60 to 70% in the Yakima Valley and 70 to 80% in the Columbia Basin of Washington. None of the GFS ensemble members reach >=90 degrees on Saturday for Tri-Cities whereas approximately 50% of the ECMWF ensemble members >= 90 degrees.

High temperatures will range from the upper 70s to mid 80s on Friday, then generally in the 80s to around 90 degrees on Saturday. Overnight lows will be in the 40s tonight and the 40s to lower 50s Friday night.

LONG TERM
Sunday through Thursday..A shortwave trough will approach the area on Sunday and move across the region Sunday night.
The ensemble clusters favor a flat wave compared to the higher amplitude depicted in the deterministic models. Sunday will be the last very warm day with high temperatures in the mid 80s to lower 90s in the lower elevations. Probabilities of 90+ degree high temperatures Sunday are 30-70% across the Columbia Basin and Yakima Valley. A cold front will cross the area Sunday associated with the shortwave and it will become breezy through the Cascade gaps in the afternoon and evening. The winds will continue on Monday along with cooler temperatures (8-10 degrees cooler than Sunday.) The 12Z GFS is forecasting the surface pressure gradient between PDX and GEG to exceed 10 mb on Sunday night and Monday which supports windy west winds in the lower elevations. Probabilistic NBM for the 24 hours ending at 11 PM Monday shows a 50-70% chance of winds exceeding 45 mph in the usual windy locations under strong westerly flow regimes.

On Tuesday into early Wednesday the GEFS and ECMWF ensemble build a ridge into the region from offshore with NWLY flow aloft over the area. This will result in dry and warm conditions on Tuesday and possibly Wednesday though the uncertainty in the forecast begins to increase on Wednesday and even more on Thursday. For Thursday the ensemble clusters are split with roughly half the ensemble members favoring a trough solution and the other half favoring a ridge. This is creating significant uncertainty in the temperature forecast for mid week. For example, on Thursday at Pendleton the NBM 25th percentile high temperature is 66 degrees and the 75th percentile is 85 degrees. The GFS and ECMWF ensemble temperatures are cooler than the official forecast so it is possible that temperature will have to be nudged downward in later forecasts. The chance for precipitation appears quite low through the period. Except for occasional POPS 15-20% along the Cascade crest, Northern Blues and Wallowas, the chance for measurable precipitation elsewhere is 10% or less. 78

AVIATION
00z TAFS...Little to no aviation concerns the next 24- hrs. The latest satellite imagery shows SCT-BKN mountain cu across parts of central OR mountains to the eastern mountains that should diminish with the loss of daytime heating around 02-06 UTC this evening. High confidence (>80%) in limited sky cover over the basin and lowlands through the TAF period, though mountain cu development is expected again. Current thinking is similar to today but leaning towards a somewhat larger geographic area across the higher terrain of central OR, Ochocos, John Day Highlands, and eastern mountains with bases >6 kft and higher. Otherwise, an upper ridge aloft will remain and dominate our local sensible weather. A light surface gradient in place with an innocuous surface pressure pattern prevailing that will promote light winds and breezes through the period. Of which, 24-hr daily max sustained winds chance of exceeding 11 kts is sub-60 percent at all TAF sites thus high confidence in place for this outcome.

PRELIMINARY POINT TEMPS/POPS
PDT 47 79 51 84 / 0 0 0 0 ALW 50 82 54 86 / 0 0 0 0 PSC 52 86 55 91 / 0 0 0 0 YKM 48 85 51 90 / 0 0 0 0 HRI 49 84 53 90 / 0 0 0 0 ELN 49 83 53 87 / 0 0 0 0 RDM 40 78 46 83 / 0 0 0 0 LGD 44 76 49 81 / 0 0 0 0 GCD 43 77 47 81 / 0 0 0 0 DLS 53 86 57 89 / 0 0 0 0

PDT WATCHES/WARNINGS/ADVISORIES
OR...None.
WA...None.

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Des Moines
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Thu -- 12:20 AM PDT     6.32 feet Low Tide
Thu -- 05:22 AM PDT     11.71 feet High Tide
Thu -- 05:39 AM PDT     Sunrise
Thu -- 06:15 AM PDT     Moonrise
Thu -- 12:38 PM PDT     -3.01 feet Low Tide
Thu -- 08:00 PM PDT     12.38 feet High Tide
Thu -- 08:32 PM PDT     Sunset
Thu -- 11:18 PM PDT     Moonset
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Tacoma
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Thu -- 12:20 AM PDT     6.32 feet Low Tide
Thu -- 05:24 AM PDT     11.83 feet High Tide
Thu -- 05:40 AM PDT     Sunrise
Thu -- 06:16 AM PDT     Moonrise
Thu -- 12:38 PM PDT     -3.01 feet Low Tide
Thu -- 08:02 PM PDT     12.50 feet High Tide
Thu -- 08:32 PM PDT     Sunset
Thu -- 11:17 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION

Tacoma, Commencement Bay, Washington, Tide feet

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