The latest forecast warned that heavy rain and snow could unload in portions of Washington and Northern California this week as many Americans prepared for December.

Residents near the affected areas should observe the severe weather conditions as flooding rainfall could unleash this week.

Motorists traveling outdoors should stay alert on the road as travel hazards are possible, including poor visibility and small flooding.

February 13, 2021 in Seattle, Washington
February 13, 2021 in Seattle, Washington David Ryder/Getty Images

In the previous forecasts, portions of the United States have been hit by severe weather conditions, causing concerns over travel delays.

The severe weather conditions have helped for a colder temperatures, marking the arrival of winter.

Heavy snow and rain

According to the latest forecast on November 29, AccuWeather reported major travel delays could emerge due to the atmospheric river, causing heavy downpours and snow.

The forecast noted that western Washington could expect heavy rain starting Wednesday, while Northern California residents could feel the brunt of the atmospheric river the same day.

Urban flooding to small flooding could also occur due to heavy rain.

The weather website defined the atmospheric river as the heavy moisture affecting Washington to North California residents.

The report noted that the atmospheric river effect would stretch to the West Coast and Southern California this week.

The forecast added that the weather could weaken starting Friday before reaching portions of Southern California.

As many Americans are ready for the ski season and winter, it is expected that more snow could unload starting this week.

According to AccuWeather's Low-Elevation Snow Outlook, the artic air would bring colder temperatures to Spokane, Boise, and Helena.

The report added that heavy snow accumulation could occur in Cascades and Snoqualmie.

In addition, snow will emerge in Seattle, Portland, Casper, and Salt Lake. Individuals traveling for outdoor activities and on the mountains should look into travel and mountain snow hazards.

The temperatures become colder this week.

According to the forecast, snowfall emerged on Monday, causing significant travel delays.

The report also added that heavy snow could be expected in British Columbia, Washington, Vancouver, and Everett.

Furthermore, the Wednesday night forecast showed snow would persist in Seattle, Vancouver, Spokane, Boise, and Portland.

The mixture of rain and snow could disrupt outdoor activities, especially the daily commutes.

It is best to stay at home until next week.

The Thursday and Friday morning forecast showed that stormy weather could be felt, causing beneficial rainfall, snow in the Sierra Nevada, windy feeling on the coast, and travel delays.

Rain is expected in San Francisco, Los Angeles, and San Diego. In addition, residents in Salt Lake City could see rain and snow.

Weather becomes colder

As the weather in portions of the United States recorded a mixture of snow and rain, it would be expected that winter is in the air.

It is essential to prepare for the winter and potentially stormy weather.

Travel hazards are also possible, and it is best to always check the road map before traveling outside.

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