NFL SCHEDULE: Release info for regular season. The 2017 NFL preseason schedule includes eight nationally televised games, including the preseason-opening Hall of Fame Game, which this year features the Cowboys and Cardinals.
Synoptic Scale Forecasting: A Primer . Weather Scales. The American Meteorology Society (AMS) defines a synoptic chart as any chart or map on which data and analysis are presented that describe the state of the atmosphere over a large area at a given moment in time.
Synoptic Charts. The main weather element shown on a synoptic chart is air pressure. Isobar lines, which join up areas of equal air pressure, are drawn on these maps. The pattern these lines make show areas of low pressure or high pressure.