Environment Canada has put the West Columbia (including Revelstoke) on a weather watch, saying severe thunderstorms packing hailstones up to three centimetres in diameter are possible. A toonie is just under three centimetres in diameter.
At this point, it’s a watch, not a stronger warning.
Here’s the link, and here’s the exact wording of the warning as of 9:30 a.m. Wednesday, Aug. 8:
Environment Canada’s Official Weather Warnings
3:54 AM PDT Wednesday 08 August 2012
Severe thunderstorm watch for West Columbia issued
Severe thunderstorms possible this afternoon.
Monitor weather conditions. Listen for updated statements. If threatening weather approaches take immediate safety precautions.
Conditions are favourable for the development of thunderstorms over the above mentioned regions. There is the potential that some of these thunderstorms may become severe. These severe thunderstorms are capable of producing large hail of up to 3 cm in diameter, heavy downpours, and strong wind gusts.