Marine Weather and Tide Forecast for Moscow, ID

SYNOPSIS
Strong high pressure will remain in place through at least Tuesday. In the meantime, low clouds and fog are expected to impact the lowlands through early next week. Confidence is low on coverage and timing of low cloud and fog coverage. There is an increasing signal for unsettled conditions to return by the middle-to-later stages of next week.

DISCUSSION
Today through Monday: The persistent ridge is is still positioned of the coast and continue to create stable and stagnant conditions for the Inland Northwest. Stratus and fog continue to be impact locations across the Basin and in the valleys. The higher terrain across the region. The models are in good agreement on the stubbornness of the ridge. Areas along the edges, particularly near the Cascades could see some breaks in the stratus during the afternoon hours. Highs will continue to be in the 30s for most with of the edge locations reaching into the low 40s.

Tuesday through Saturday: Ensembles are beginning to show a change in the upper level pattern starting Tuesday. The region becomes wedged between high over the Pacific and strengthening Low over Manitoba. It will allow a strong North to South flow pattern and bring a series of shortwaves and cold Arctic air into the region. The first wave on is expected to glance the Idaho Panhandle. Ensembles have been shifting it eastward. Light snow showers with little to no snow accumulation expected through Wednesday. The next wave is expected late Thursday into Friday. This is one to watch. While it is several days out, ensembles are hinting at decent mountain snow amounts and possible low land impacts. Highs will be in the low 30s and 20s.
Lows will upper teens and 20s. /JDC

AVIATION
18Z TAFs: Persistent and widespread low stratus will continue through the TAF period, with primarily MVFR/IFR conditions. Expect stratus cover to slosh around a bit, but continue to have a presence over the Inland Northwest through the weekend. Recent observations and trends have heavily shaped the forecast with models continuing to have a poor handle on conditions. Winds will remain light and variable at most sites. If any sites on the edge of the stratus are able to break out this afternoon, expect stratus/fog to fill back in tonight.

FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: High confidence is areas of persistent low stratus to continue. Low confidence on specific locations of fog development.

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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 36 24 37 24 36 24 / 0 0 0 0 0 0 Coeur d'Alene 38 24 38 22 37 24 / 0 0 0 0 0 0 Pullman 40 26 38 26 38 27 / 0 0 0 0 0 0 Lewiston 41 29 40 27 40 28 / 0 0 0 0 0 0 Colville 37 22 38 21 37 23 / 0 0 0 0 0 0 Sandpoint 36 25 37 22 35 25 / 0 0 0 0 0 0 Kellogg 40 29 39 24 39 27 / 0 0 0 0 0 0 Moses Lake 37 25 38 24 37 25 / 0 0 0 0 0 0 Wenatchee 37 29 40 29 38 28 / 0 0 0 0 0 0 Omak 38 26 38 25 37 25 / 0 0 0 0 0 0

OTX WATCHES/WARNINGS/ADVISORIES
WA...Air Stagnation Advisory until 4 PM PST Tuesday for Central Chelan County-Moses Lake Area-Northeast Mountains- Okanogan Highlands-Okanogan Valley-Spokane Area-Upper Columbia Basin-Waterville Plateau-Wenatchee Area-Western Chelan County-Western Okanogan County.
ID...Air Stagnation Advisory until 4 PM PST Tuesday for Central Panhandle Mountains-Coeur d'Alene Area-Lewis and Southern Nez Perce Counties-Lewiston Area-Northern Panhandle.