Portland temperatures will drop into the mid-20s Thursday night, refreezing snow-covered roads that will stay slick for the morning commute, a meteorologist said.

The National Weather Service predicts Portland will see mostly sunny skies and a high near 32 degrees Friday. Sun might melt some snow, said weather service meteorologist Miles Higa, but current accumulation is going to be slow to melt.

We may see snow during the weekend, too: There's a 20 percent chance of showers Saturday, 30 percent chance that night and 50-50 shot Sunday, according to the weather service.

Forecasters predict possible accumulation of less than a half-inch both Saturday night and Sunday, respectively.

Conditions will stay dry Friday, however, with temperatures dropping into the teens overnight. Forecasters predict a Saturday high near 31.

Temperatures are expected to warm to the upper 30s Sunday and stay above freezing through at least Thursday, according to the weather service.

Wednesday's winter storm debilitated Portland, causing a traffic gridlock, car crashes and bus problems. Some motorists abandoned their cars. Snowplows and buses were stuck in traffic. School districts canceled Thursday classes.

Many districts are closed or delayed Friday, as well, and Portland is among several cities opening offices later than usual Friday.

-- Jim Ryan

jryan@oregonian.com

503-221-8005; @Jimryan015