"It will be similar to a cold period seen in spring 2013 and is very likely to be colder as it is slightly earlier in the year meaning the sun is not as strong.Significant snow showers will sweep the United Kingdom from Monday bringing heavy frost and the risk of widespread disruption".
Despite recent spring-like weather, forecasters are expecting snow to return, marking a prolonged cold snap that could last well into March.
Mr Bowles said: "Somewhere like the Scottish mountains might go lower than that, but that's actually quite normal in the Scottish mountains, whereas it's definitely not normal to have minus 5C in London at the end of February".
Met Éireann says it will be dry settled but cold for the remainder of the weekend but a return to winter is its forecast.
"Saturday night will be dry with good clear spells and easterly winds will be light to moderate".
It's predicted to be one of the coldest spells Kent has seen since the nationwide freeze of January 1987, which left the country snowbound for a week, with temperatures of -10C.
"However, what makes this situation unusual is the intensity of the cold air for this time of year that is getting pulled down from Siberia".More news: How has Brexit impacted your long term plans — European Union citizens
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"There's going to be snow showers coming through with this cold weather".
Saturday is looking to be the coldest day of 2018 so far.
Dog walkers braving cold conditions.
"During Monday and Tuesday, snow showers are expected to move into eastern areas, before spreading westwards across England".
Forecasters are eyeing the possibility of less-cold air eventually moving north from the Mediterranean to drive icy easterly winds away from Britain.
"A further update and extension to this alert is therefore expected on Monday".