6a0790f77bd4361449dd00889621bd39Bitter arctic winds, nationwide snow and record low temperatures could trigger a national crisis, experts have warned. With Monday signalling the first day of winter, forecasters concede their worst fears are about materialise after weeks of speculation as to the severity of this winter. Chaotic weather patterns over the past few weeks including unseasonal heat followed by sub-zero night-time temperatures have helped sway predictions. The jet stream has been nudged by the devastating US winter freeze with the catastrophic knock-on effects about to bring Britain to a shivering halt. More