As another snowstorm hammers the Northeast, today's retail sales report reminds us how much damage inclement weather can have on consumer demand and the economy. Everyone is blaming the weakness in retail sales on the weather but there's no question that the slowdown in job growth in December and January also contributed to the contraction in demand. If economists are blaming the pullback in spending on inclement weather, then we can also attribute the market's disappointment and the sell-off i…