Speaking ahead of the launch of a Met Office report - produced by the Centre of Ecology and Hydrology - into recent climatic events, Dame Julia said the UK had seen the "most exceptional period of rainfall in 248 years".
Unsettled weather at this time of year was not unexpected - but the prolonged spell of rain, as well as the intensity and height of coastal waves, was "very unusual".
"We have records going back to 1766 and we have nothing like this," she said. "We have seen some exceptional weather. We can't say it is unprecedented but it is exceptional."
The report links the recent extreme weather in Europe and North America to "perturbations" in the North Atlantic and Pacific jet streams, partly emanating from changing weather patterns in South East Asia and "associated with higher than normal ocean temperatures in that region".
Thank you for the link - I knew you would be the person to answer Martin's question.
I couldn't agree with you more on Lawson this morning & almost emailed into the Today programme to protest. Perhaps I will now, that I know I was not the only one shouting at the radio!
Kind regards
Vanessa