The National Weather Service has issued a freeze warning for all of Benton and Franklin County and western Walla Walla County starting early Wednesday morning.

This continues until 9 a.m.

Snow is also forecast over the Cascade Passes.

THE temperature in the Tri-Cities near the Columbia River could get as low as 33 degrees early Thursday.

But in north Richland and just north of Pasco and Connell, a low of 31 is expected. In Prosser, a minimum of 30 is possible.

The weather service recommends taking steps to protect tender plants from the cold, especially in remote areas.

It’s also a reminder to blast sprinkler systems before pipes freeze when temperatures plummet in late fall and winter.

Rain is likely on Halloween in the Tri-Cities, but nighttime temperatures will be warmer. A low of 41 is forecast for Thursday evening.

Wednesday travelers can expect snow mixed with rain Wednesday on Interstate 90 over Snoqualmie Pass, but little to no snow is expected to accumulate.

However, by Friday, accumulations of less than half an inch are possible, according to the weather service forecast.

A winter weather warning was issued for White Pass in the Cascade Mountains from 2 p.m. Wednesday to 5 a.m. Thursday.