EVERETT — A combination of heavy rain and melting snow in the lowlands could increase the risk of flooding and landslides in Snohomish County, according to the National Weather Service.

Between Wednesday evening and Friday afternoon, Everett could see up to 2 inches of rain, according to the National Weather Service’s Seattle office. Monroe could see 2 to 3 inches of rain. Darrington might get as much as 4.

Meteorologist Dustin Guy expected snow and a snow-rain mix Wednesday night. That should transition to rain as temperatures warm, he said. He predicted little snow accumulation.

“Thursday will be the main event” for rainfall, Guy said.

Western Snohomish County, including Everett, Marysville, Lynnwood and Edmonds, are under a flood watch through Saturday afternoon. While Snohomish County rivers are not forecast to reach flood stage, the amount of lowland snowmelt makes the extent of flooding uncertain, the weather service noted.

“When you have heavy rain and lowland snow melt, it could lead to localized river flooding and urban flooding,” Guy said. “You can get a lot of runoff.”

Those in low-lying, flood-prone areas should monitor flood warnings and be prepared to take action.

Guy said heavy rain can also destabilize the ground and increase the threat of landslides.

The rain should slow by Friday afternoon, when on-and-off showers are expected. Guy said the weekend could offer a break from the rain, with dry weather in the forecast.

Jacqueline Allison: 425-339-3434; jacqueline.allison@heraldnet.com. Twitter: @jacq_allison.