Finding Fronts

nam_thick

Fig. 1: The nam_thick (NAM initialization of surface isobars with overlay of 1000-500 mb thickness) for 12 UTC 10/22/09

METAR Plot

Fig. 2: Surface Data Plot (METAR observations for 1243 UTC 10/22/09 for lower Mississippi River Valley)

HPC Sfc Analysis

Fig. 3: The NCEP/HPC Surface Analysis for 12 UTC 10/22/09