EVERETT — It’s snowing, it’s raining — oh, wait, it’s snowing again.

The weather roller coaster is expected to continue today with up to two more inches of morning snow, followed by warmer afternoon temperatures, rain and wind in locations below 1,000 feet, according to the National Weather Service.

Fresh snow was piling up this morning around Snohomish County, just in time for the commute and the final hours for Christmas shopping.

Slippery roads likely will be around most of the day. Temperatures are expected to creep up to a high of 35 today and winds could pick up to 17 mph, with gusts of 23 mph.

By Christmas, forecasters are expecting a low pressure system will bring more snow showers to the area. By Friday, the weather service is predicting a warm front will move into the area and stay.

The weather service downgraded a winter storm warning to a winter weather advisory through 4 p.m. today. An advisory for snow means periods of snow could cause problems on roadways. Be prepared for snow covered roads and limited visibility.

At least one boat owner faces a costly cleanup after a cabin cruiser sank Tuesday under the weight of snow at Shelter Bay Marina, near La Conner.

Rain falling onto a boat covered with snow or slush can add even more weight to a vessel. State ecology department officials urge boat owners to sweep snow off their vessels .

“We’re seeing many boats, covered in snow, riding low in the water,” Zach Gaston, an ecology spill responder warned in a release. “If you have a boat moored on the water, go out and sweep off the snow. Better to do that than having to raise a sunken boat.”

People traveling over the mountains should be prepared for hazardous driving conditions.

Chains or snow tires are recommended on U.S. 12 west of White Pass. At I-90 at Snoqualmie Pass and U.S. 2 at Stevens Pass, traction tires are advised and roadways are covered with compact snow and ice. Another 5 to 10 inches of snow are expected to fall today in the passes and along the west slopes of the central Cascades.

As temperatures warm at lower elevations, state transportation officials warn the next hazard for drivers is slush and walls of snow along roadways.

Drivers also should be prepared for more trucks and oversized loads on state highways. The heavy trucks waiting to cross the mountain passes are moving again.

Officials advise pulling off chains before hitting the highway. Most of the state’s primary routes are bare and wet. Drivers who clunk along bare roadways with their chains on risk losing them. Crews have been out collecting lost chains from I-5 and other routes.

It’s not a good idea to try removing chains along the roadside either. At least one person was hurt doing just that, an official said.