Significant Rainfall and Wind Advisory through Friday Evening

Heavy rain is expected to persist through Friday evening, with significant wind advisories in place. Winds will reach 35-45 MPH, potentially causing travel risks. Rain will taper through the weekend with mountain snow forecasted. As temperatures drop with high pressure settling in, conditions may lead to the potential for patchy morning fog heading into Thanksgiving.

A significant amount of rain is expected to continue through Friday evening, with a Wind Advisory in effect for the base of the Northern Foothills of the Blue Mountains until 3 p.m. Winds will be sustained at 25-35 MPH, with gusts reaching 35-45 MPH, potentially causing fallen branches or power outages, leading to hazardous travel conditions. The rain is attributed to a warm front which will taper off by mid-morning, followed by sporadic heavy showers throughout the day and evening. High temperatures will range from the upper 40s to the low 50s, while warmer downslope winds in the Blue Mountain Foothills can elevate temperatures up to the low 60s.

As Friday progresses, the rain will continue overnight, with lows settling in the upper 30s to low 40s. This weather system—originating from an atmospheric river—will stagnate along the Washington-Oregon coastline until Monday morning. Consequently, light showers will persist during the weekend, bringing mountain snow to the Washington Cascades on Saturday and extending to the Oregon Cascades and Blues on Sunday. By the end of the weekend, snow levels are forecasted to drop to approximately 4,000 feet.

The weekend will conclude with an influx of cool, dry air as the upper low transfers eastward, allowing cold air from Canada to flow into the region. High pressure will set in, resulting in daytime highs decreasing to the upper 40s and mid-40s, with nighttime lows approaching freezing and potentially dipping below it. An inversion may develop within the mid-levels of the atmosphere, maintaining similar temperatures through Thanksgiving weekend, alongside the possibility of patchy morning fog as December approaches.

The detailed weather forecast for the Tri-Cities region predicts mostly cloudy skies with morning rain on Friday, followed by partially cloudy conditions and scattered showers over the weekend. Yakima’s forecast mirrors this pattern with mostly cloudy skies punctuated by occasional rain.

The following is a summary of the weather conditions:

Tri-Cities Forecast:
– Friday: Mostly cloudy with morning rain… 50/39
– Saturday: Partly cloudy with a chance of showers… 52/37
– Sunday: Partly cloudy with a chance of showers… 48/35
– Monday: Mostly cloudy with a chance of showers… 47/34
– Tuesday: Partly to mostly cloudy with a slight chance of showers… 47/32
– Wednesday: Mostly cloudy… 45/30
– Thanksgiving: Mostly cloudy with inconsistent showers… 43/29

Yakima Forecast:
– Friday: Mostly cloudy with morning rain… 47/36
– Saturday: Mostly cloudy with a chance of showers… 49/33
– Sunday: Mostly cloudy with a chance of showers… 45/30
– Monday: Partly cloudy with a chance of showers… 43/29
– Tuesday: Partly cloudy with possible patchy morning fog… 44/27
– Wednesday: Mostly cloudy with a chance of overnight patchy fog… 42/25
– Thanksgiving: Mostly cloudy with a chance for overnight patchy fog… 40/26.

This article provides a detailed weather forecast focusing on the expected rainfall, wind advisories, and temperature variations across the Tri-Cities and Yakima regions. The discussion centers around a low-pressure system fed by an atmospheric river, which affects precipitation patterns and temperature stability going into the Thanksgiving holiday. Additionally, it covers the implications of wind speeds and changing weather conditions in the coming days.

In conclusion, a sequence of weather changes is anticipated as significant rainfall gives way to cool, drier air associated with a developing high-pressure system. The Tri-Cities and Yakima regions will experience cooler temperatures, potential snowfall in the mountains, and the possibility of patchy fog as they approach Thanksgiving. Residents should remain alert for possible travel hazards due to high winds and rainfall, particularly through Friday evening.

Original Source: www.nbcrightnow.com