Snow is in the forecast tonight and into the early morning Friday, but little or no accumulation is expected, according to the National Weather Service office in Huntsville.

The chance of precipitation is 70 percent, with the overnight low around 33 degrees.

An advisory from the weather service states a quick-moving upper-level disturbance brings the chance of wintry precipitation beginning tonight and continuing early into Friday morning. The precipitation should begin as a mix of light sleet and snow and transition into snow after midnight.

Light accumulations are expected, with mainly less than half an inch possible, particularly on grassy surfaces, according to the advisory.

The highest accumulations are expected to occur southwest of a line from Muscle Shoals to Hartselle, the weather service states.

Friday’s high will be near 47 with a low well above freezing at 43.

Robert Boyd, senior forecaster at the weather service office, said it would be difficult for freezing rain to occur this time of year because the daytimes are longer, but it’s possible areas such as bridges and overpasses could become slick. Any precipitation would transition into rain by 8-9 a.m. Friday.

Warming temperatures Friday should lead to a wet weekend with chances of rain in the 50-percent to 70-percent range Friday through Sunday, with highs in the 50s and 60s.

“It’s just an unsettled period for a few days,” Boyd said. “It’ll stay wet through Sunday night and then on Monday dry out.”

Alabama Department of Transportation Maintenance Engineer Mark Dale said department personnel were out Wednesday pretreating state routes in the Shoals with salt brine as a precaution.