Photo: DriveBC

Box Canyon - S Hwy 5, near Box Canyon Chain-up Area, looking south.

UPDATE 8:36 a.m.

Much of B.C.'s southern interior will also see temperatures plunge from highs of around 30 C reached over the weekend.

A cold front is due to arrive late Monday blanketing the highway summits with as much as 10 centimetres of snow by Tuesday night.

The weather office says unsettled conditions will push temperatures down to the mid-teens in parts of the Interior and especially at higher elevations like the mountain passes, possibly including the Okanagan Connector as well.

The long-range forecast shows sunshine returns across most of B.C. to start the Victoria Day long weekend.

ORIGINAL 6:23 a.m.

Environment Canada has issued a special weather statement for:

• Coquihalla Highway - Hope to Merritt
• Highway 3 - Hope to Princeton via Allison Pass

Environment Canda is forecasting a cold front to move across southern British Columbia tonight through Tuesday bringing precipitation. As snow levels drop to around 1000 metres overnight, higher elevations of Coquihalla Highway - Hope to Merritt and Highway 3 - Hope to Princeton will receive snow.

As much as 5 to 10 centimetres of total snow accumulation are expected by Tuesday evening.

Weather in the mountains can change suddenly resulting in hazardous driving conditions, check Castanet traffic cameras and DriveBC for latest driving conditions.