A storm advisory was issued Tuesday, Aug. 2, for mountain passes, including the Coquihalla between Hope and Merritt and the Okanagan Connector.
Conditions are favourable for development of severe thunderstorms that may be capable of producing strong wind gusts, large hail and heavy rain.
Anyone travelling the routes, including Hwy. 3 to Princeton, should drive accordingly and reduce their speed if the weather turns foul.
Severe thunderstorm watches are issued when atmospheric conditions are favourable for the development of thunderstorms that could produce large hail, damaging winds or torrential rainfall.
Weather in the mountains can change suddenly resulting in hazardous driving conditions.
After a long weekend that brought a little of everything in the weather category, more unsettled conditions were expected over Kamloops Tuesday. There is a 60 percent chance of showers or thunderstorms by this evening with winds gusting between 30 and 50 km/h.
Wednesday is forecast to be a mix of sun and cloud with only a 30 percent risk of storms.
Weather should improve by Thursday with sunny skies and a high of 31 C and a mix of sun and cloud Friday with temperatures reaching 30.
The seven-day outlook calls for that pattern to continue through to Monday, Aug. 8.