It has become apparent this afternoon and evening, through multiple conversations with the weather observers at Reagan National Airport, that the snowfall totals submitted to the National Weather Service for that location have not been measured properly. As of 8 p.m., 17.8 inches of snow had been recorded at National - Washington, D.C.'s official weather monitoring location. That reflects just a 0.3-inch increase in the three hours since 5 p.m. during which time light to moderate snowfall was being reported at the airport. The National Weather Service has clear guidelines on how to measure snowfall for one simple reason: snowstorms...