Marine Weather and Tide Forecast for Spokane Valley, WA

DISCUSSION

Tonight through Thursday: Weak ridging with minor disturbances moving through it will interrupt the diurnal wind trend but wont be too gusty into the evening and is likely to subside during the overnight hours, in addition some cloud cover associated with the exiting weak frontal zone may linger for a spell.

Friday through Sunday: An area of low pressure deepening and intensifying as it approaches the Northern California coast from the west will help amplify high pressure over Eastern Washington and North Idaho into Saturday, and likely beyond. Ensembles have most of the energy and moisture associated with this low passing to the south via a route thru Oregon so generally dry weather and mostly clear skies coupled with a warming trend remains in place through Sunday.

Monday through Thursday: By Monday the upper level ridge axis is placed west over Western Montana. This allows for disturbances and moisture feeds to drape and lean into the available southwest to northeast steering flow provided by this western edge of the upper level ridge axis. As such a frontal zone with a moderately established moisture feed may allow for clouds to invade the sky from the west and minor chances of light showers near the Cascade Crest as early as Monday night. Beyond Monday the evolution continues with the ridge axis displaced further east (closer to the Dakotas) as a large upper level trof offshore shows a tendency to broaden and intensify. Disturbances and moisture running through the provided southwest to northeast path between the upper level trof off shore and the longwave ridge to the east is has a better chance of providing a better chance of precipitation along with cooler temperatures and prolonged interval of increased cloud cover Tuesday through Thursday. /Pelatti

AVIATION
06Z TAFS: Weak high pressure will allow VFR conditions to prevail for the period. Middle to high level clouds will increase from the west-southwest this evening with ceilings lowering to 12-15kft early Friday morning. Winds will be light with speeds less than 10 knots across the region.

FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: Confidence is high for VFR conditions across the TAF sites.

PRELIMINARY POINT TEMPS/POPS
Spokane 38 67 40 74 41 73 / 0 0 0 0 0 0 Coeur d'Alene 39 67 41 73 42 72 / 0 0 0 0 0 0 Pullman 41 66 43 74 42 73 / 0 10 0 0 0 0 Lewiston 49 73 49 79 49 75 / 0 10 0 0 0 0 Colville 27 67 29 72 32 75 / 0 0 0 0 0 0 Sandpoint 35 63 36 69 38 70 / 0 0 0 0 0 0 Kellogg 45 68 46 74 48 73 / 0 10 0 0 0 0 Moses Lake 37 67 38 74 38 74 / 0 0 0 0 0 0 Wenatchee 43 67 44 74 48 74 / 0 0 0 0 0 0 Omak 39 68 40 74 43 75 / 0 0 0 0 0 0

OTX WATCHES/WARNINGS/ADVISORIES
ID...None.
WA...None.