New unemployment claims jumped by 66,000 last week to 374,000 after months settling down toward 300,000. This doesn't begin to show the real effects of the government shutdown as contractors are only now beginning to kick people to the curb. The effect this will have on the rest of economy will begin to show soon as the lack of spending by those affected by the shutdown starts to mushroom into a reduction in US GDP. This is one of those self reinforcing feedback loops that are commonly referred to as a 'death spiral'.
You see, the problem isn't confined to the simple math of less spending, but is actually multiplied by the fact that the natural mitigators of an economic downturn that we commonly refer to as 'government safety nets' are also being removed. State run programs are running out of 'pass through' money, and the charities will be affected soon. Right wingers are always saying churches could care for the poor better and somehow do it at no cost, but the christian charities get 2/3 of their money from the Feds. With Uncle Sam out the picture, their private donations will dry up too.