We've been experiencing some traditional Scottish weather recently - changeable and unsettled. This is caused by low-pressure systems moving in from the Atlantic. It means we get a mixture of brighter spells and variable amounts of cloud and blustery, sometimes heavy and thundery showers. Low pressure puts us into an unstable air mass, which keeps us on our toes - one minute you're waking up to blue skies and lovely sunrises, the next minute you're being blown sideways by an unexpected gust of w