For all the talk of snow bringing the country to a standstill, the actual amount that has settled doesn't seem that much to me, despite the dire warnings from the meteorologists.
Back in 1987 Michael Fish famously dismissed the possibility of heavy storms- right before the heaviest storms in living memory devastated southern England- and has held a degree of notoriety for this erroneous prediction ever since.
No one ever pays a price for an excessively scary prediction, think of the Y2K experts, but failing to spot a problem earns an unwanted place in folk memory. Hence weather forecasters are more likely to overstate the severity of the weather than to understate it.