Marine Weather and Tide Forecast for Manson, WA

SYNOPSIS
High pressure continues across the region this week, bringing steadily warmer and drier conditions each day. Wildfire smoke will bring degraded air quality for the Inland Northwest. Breezy winds increase late in the week, leading to increased fire weather conditions Friday and Saturday. Cooler conditions expected for start of next week.

DISCUSSION
Tuesday through Thursday: Broad ridge pattern will keep dry, warm conditions over the region for the next several days. Winds will be light, diurnal driven with strongest winds along the east side of the Cascades. Wind gusts will be in the teens for the area. For temperatures, highs will climb into the 90s with humidity in the teens. There is a 50-70% probability for portions of the Lower Columbia Basin, including Wenatchee and Lewiston, on reaching 100 on Thursday. Wildfire smoke will play a big part on the highs. It could possible shave off a few degrees. Overnight lows will be in the 50s to low 60s.

Friday and Saturday: A weak trough will press into the region.
It will bring a zonal flow pattern. Winds will increase as warm dry conditions continue. Winds will be West with sustained speeds in the teens and gusts into the 30s. One major difference from August 1 is the lack of strong low level winds.
850-700mb winds are only reaching into the 15-25 mph range compared to the 30-40 mph from August 1. It is still an elevated to critical fire weather period due to the continued hot and dry conditions with the breezy winds. Highs will be in the upper 80s and 90s with humidity in the teens to low 20s.
Overnight lows will be in the 50s to low 60s.

Sunday through Monday: Cooler air mass will filter into the region. There is still no decent chance of of precip expected on for the period. Highs will dip into the 80s. Lows will be in the upper 40s and 50s. /JDC

AVIATION
12Z TAFs: Wildfire smoke will continue to bring MVFR to degraded VFR conditions across the Basin. Ceilings between 3000-5000 ft associated with a thicker smoke layer can also be expected at times, especially closer to larger fires. Winds will become more westerly to northwesterly across the sites by late Tuesday morning.

FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: Moderate confidence in winds. Moderate confidence for smoke impacts bringing MVFR to IFR visibilities for area TAF sites.

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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 85 53 91 56 95 60 / 0 0 0 0 0 0 Coeur d'Alene 84 54 89 57 94 60 / 0 0 0 0 0 0 Pullman 83 46 89 50 93 53 / 0 0 0 0 0 0 Lewiston 89 57 95 61 101 66 / 0 0 0 0 0 0 Colville 86 46 91 50 95 54 / 0 0 0 0 0 0 Sandpoint 82 48 87 52 92 56 / 0 0 0 0 0 0 Kellogg 80 52 85 55 91 58 / 0 0 0 0 0 0 Moses Lake 89 54 94 57 98 61 / 0 0 0 0 0 0 Wenatchee 90 64 95 66 100 68 / 0 0 0 0 0 0 Omak 90 57 95 61 99 64 / 0 0 0 0 0 0

OTX WATCHES/WARNINGS/ADVISORIES
WA...Air Quality Alert until further notice for Adams, Asotin, Chelan, Douglas, Ferry, Garfield, Grant, Lincoln, Okanogan, Pend Oreille, Spokane, Stevens, and Whitman Counties ID...Air Quality Alert until noon PDT Wednesday for Boundary, Bonner, Benewah, Clearwater, Idaho, Kootenai, Latah, Lewis, and Nez Perce, and Shoshone Counties