Updated: Heavy snowfall is expected to move into parts of the southern Interior this evening.

Environment Canada has issued a snowfall warning for the North Thompson, the Shuswap and the North Columbia regions, as well as the North Okanagan.

The storm is expected to bring 20 to 30 centimetres of snow in those regions, starting this evening and “intensifying” overnight, and lasting through the day tomorrow before tapering off in the evening.

“Consider postponing non-essential travel until conditions improve. Visibility may be suddenly reduced at times in heavy snow,” the forecast reads.

The snowfall warning is also in place for the South Thompson and Central Okanagan, although lesser amounts of snow are expected.

Meteorologist Armel Castellan says in Kamloops, two-to-four centimetres of snow will fall in Kamloops tonight and 2-4 cm more will fall tomorrow, before the snow switches to rain with rising temperatures.

He says higher elevations though will see up to 10 centimetres of snow.

“As you head a little bit further west, the accumulations are not going to be as strong. But the Coquihalla Highway should see 2-4 tonight and then 2-4 again tomorrow. And then the freezing levels are going to rise to about 1,300 metres, so it’s going to be a little bit closer to that rain-snow boundary as you get closer to the summits.”

Castellan says there will be a reprieve in active weather before another storm is expected to move into the Kamloops area on Thursday, which he expects will be shorter-lived than the system moving in tonight.

Watch this story for updates if the forecast changes.

(Photo: Twitter: AIM Roads)