Sunrise 6:01 AM   Sunset 7:58 PM Moonrise 2:48 PM   Moonset 3:51 AM

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PZZ135 Puget Sound And Hood Canal- 205 Pm Pdt Thu Apr 18 2024
Tonight - N wind 10 to 20 kt becoming 5 to 15 kt after midnight. Wind waves 1 to 3 ft. Fri - NE wind 5 to 15 kt. Wind waves 2 ft or less. Fri night - NE wind 10 to 20 kt becoming 5 to 15 kt after midnight. Wind waves 1 to 3 ft. Sat - NE wind to 10 kt becoming se 10 to 20 kt in the afternoon. Wind waves 1 ft or less building to 1 to 3 ft in the afternoon. Sat night - SW wind 20 to 30 kt. Wind waves 3 to 5 ft. Sun - SW wind 15 to 25 kt. Wind waves 2 to 4 ft. Sun night - W wind 5 to 15 kt becoming sw to 10 kt after midnight. Wind waves 2 ft or less. Mon - Light wind becoming N to 10 kt. Wind waves less than 1 ft becoming 1 ft or less. Tue - N wind to 10 kt. Wind waves 1 ft or less.

PZZ100 205 Pm Pdt Thu Apr 18 2024
Synopsis for the northern and central washington coastal and inland waters - High pressure will continue to develop and move towards the coast today, which will interact with low pressure over land. High pressure will to dominate through the end of the week, with the next frontal system not expected until Saturday.

FXUS66 KOTX 190501 AFDOTX

Area Forecast Discussion National Weather Service Spokane WA 1001 PM PDT Thu Apr 18 2024

SYNOPSIS
Cool and showery conditions continue today, before drying out and becoming breezy Friday. Showers return for Saturday evening through Sunday. Mild and dry weather returns for the start of work week while showers arrive by mid week.

DISCUSSION

Today through Saturday afternoon: Winds are light across the region tonight with cool temperatures. The likelihood of frost this morning remains over the Western Columbia Basin and Wenatchee area as clouds have eroded. A weak shortwave will move through the area, ushering in another bout of showers to northeast WA (perhaps even thunder - a 15% chance) and the ID Panhandle. Meanwhile, Eastern and Central Washington can expect partly to mostly sunny and dry conditions, though temperatures will remain cool in the 50s. Showers and winds will taper off in the evening.

Moving into Friday, an upper-level low will traverse the region, tightening the pressure gradient and resulting in gusty winds across the Columbia Basin. Northeast winds will gust up to 35 mph in the afternoon before easing off overnight. Despite the windy conditions, temperatures will slightly warm up and the region will experience sunny weather. Dry and gusty conditions will lead to an elevated fire weather risk in dead grasses in the Columbia Basin.

Looking ahead to Saturday, a ridge of high pressure will bring more sunny skies in the morning and temperatures in the 60s. An overcast cloud deck will move in Saturday afternoon bringing a 15% chance of showers to Stevens Pass Saturday afternoon. Winds will be breezy, gusting up to 30 mph across the region. /Butler

Saturday night through Sunday night: There is good agreement of a negatively tilted upper level trough pivoting across the Pacific NW this weekend. Moisture spread east of the Cascades Saturday evening as a cold front marches across eastern WA into north ID during the overnight hours with chance of showers. Snow levels start high but lower to 3-4K ft by Sunday morning with light mountain snow accumulations. Breezy winds accompany the front Saturday night with wind gusts of 20-30 mph especially across the Columbia Basin and Palouse. In the wake of the front, surface based instability will promote afternoon convection especially across northeast WA and the ID Panhandle with a small chance of a thunderstorm near the BC border. Sunday will be a cool and brisk day. The westerly winds remain gusty across the Palouse into north ID Sunday afternoon. The showers and winds gradually dissipate Sunday evening.

Monday through Tuesday: An upper ridge builds into WA on Monday while the upper level trough shifts east, although it still brushes the ID Panhandle. It will start off cool Monday morning with areas of frost across the lowlands of eastern WA.
Temperatures on Monday warm to near seasonal levels by afternoon.
Lingering moisture and surface based instability lead to the redevelopment of mountain showers over north ID. Winds will be lighter and shift from the east and temperatures rebound to more seasonal levels. The upper ridge shifts inland Monday night into Tuesday with light easterly winds and drier conditions. Daytime temperatures should mild on Tuesday with widespread 60s to lower 70s region-wide.

Tuesday night through Thursday: Model guidance has lower confidence with the mid week forecast, especially dealing with how long the upper ridge remains and the timing of the next Pacific low pushing inland and at what trajectory. At least through Thursday, the position of the approaching trough remain near the coast to offshore which should keep a mild southwest flow into the region. The NBM begins to spread moisture and a chance of showers across the Inland NW by Tuesday night and continues a low chance of showers through Wednesday into Thursday. Temperatures look to remain on the mild side and just above seasonal normals with little in the way threat of freezing. /rfox.

AVIATION
06z TAFS: A tight northeast pressure gradient will result in gusty northeast winds down the Purcell Trench and over the Columbia Basin. Expect gusts of 20-30 kts for KSZT-KDEW-KCOE-KGEG- KMWH on Friday. Shortwave ridging into region for Friday will result in less cloud cover and VFR conditions.

FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: There is high confidence in VFR conditions through the TAF period.

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Confidence descriptors: Low - Less than a 30 percent chance Moderate - 30 to 70 percent chance High - Greater than a 70 percent chance

For additional probabilistic information for NWS Spokane airports, please refer to the Aviation Dashboard on our webpage: https:// www.weather.gov/otx/avndashboard

PRELIMINARY POINT TEMPS/POPS
Spokane 54 31 56 33 62 39 / 20 0 0 0 0 30 Coeur d'Alene 52 30 54 31 61 38 / 30 10 0 0 0 40 Pullman 53 31 56 33 62 38 / 10 0 0 0 0 40 Lewiston 61 34 64 36 69 44 / 10 0 0 0 0 40 Colville 54 27 57 27 63 35 / 30 10 0 0 0 40 Sandpoint 50 30 52 30 60 38 / 30 10 0 0 0 50 Kellogg 49 30 51 32 61 40 / 50 20 0 0 0 50 Moses Lake 62 36 64 38 67 41 / 0 0 0 0 0 10 Wenatchee 61 37 61 37 63 41 / 0 0 0 0 0 10 Omak 59 34 62 34 64 39 / 10 0 0 0 0 30

OTX WATCHES/WARNINGS/ADVISORIES
ID...Frost Advisory until 9 AM PDT this morning for Lewiston Area.

WA...Frost Advisory until 9 AM PDT this morning for Lower Garfield and Asotin Counties-Moses Lake Area-Wenatchee Area.

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Marysville
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Fri -- 03:45 AM PDT     10.38 feet High Tide
Fri -- 04:56 AM PDT     Moonset
Fri -- 06:10 AM PDT     Sunrise
Fri -- 10:21 AM PDT     3.84 feet Low Tide
Fri -- 03:29 PM PDT     7.87 feet High Tide
Fri -- 03:52 PM PDT     Moonrise
Fri -- 08:05 PM PDT     Sunset
Fri -- 09:46 PM PDT     2.38 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Marysville, Quilceda Creek, Washington, Tide feet

Everett
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Fri -- 03:36 AM PDT     10.70 feet High Tide
Fri -- 04:56 AM PDT     Moonset
Fri -- 06:10 AM PDT     Sunrise
Fri -- 09:51 AM PDT     4.28 feet Low Tide
Fri -- 03:20 PM PDT     8.12 feet High Tide
Fri -- 03:52 PM PDT     Moonrise
Fri -- 08:06 PM PDT     Sunset
Fri -- 09:16 PM PDT     2.64 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Everett, Washington, Tide feet

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