If your neighborhood got a frosting of snow Saturday, you can expect more to come.

That’s probably the case if you live in Everett, Lynnwood or Edmonds as well as anywhere along the U.S. 2 or Highway 9 corridors.

Those areas and more could see even more flakes starting Sunday. You might even hear a few thunder claps.

“We’re going to be cold enough for snow throughout the entire day,” KIRO 7 TV meteorologist Sam Argier said. “It looks to be a little more and it looks to stick a little better as well.”

The cold weather is expected to stay until mid-week.

The National Weather Service in Seattle forecasts a high of 38 degrees and 1 to 3 inches of snow for the Everett area Sunday. Monday could bring an even cooler daytime high of 33 and the chance of more snow.

The Weather Service forecasts nighttime lows in the high 20s to low 30s for the next few days.

“It’s going to be cold for a while,” Weather Service meteorologist Johnny Burg said. “It probably won’t start warming up to about normal until about Wednesday, at least.”

After Wednesday, temperatures are predicted to return to the low 40s.

That’s the time to pay attention for possible flooding, Argier said.

A convergence zone Saturday focused much of the wintery weather on the lower half of Snohomish County. Some lowland areas saw only rain or even patches of blue sky.

“Definitely Everett was the bull’s-eye,” Argier said.

A convergence zone forms when a westward-moving system parts at the Olympic Mountains and meets up on the other side. That often happens near the King-Snohomish county line.

The mountain passes were expected to get 12 to 18 inches of new snow between Saturday and Sunday. Burg warned that could create havoc for people traveling over the Cascade Range.

The Washington State Patrol responded to 39 collisions in Snohomish, Island, Skagit and Whatcom counties from midnight until 8:30 p.m. Saturday, trooper Keith Leary said. Only seven of the crashes involved injuries and they were all minor.

Noah Haglund: 425-339-3465, nhaglund@heraldnet.com.