a
b
Figure 1. a) Visible image of the warm sector cloud band over Missouri, valid at 1645 UTC 19 April 2000 (obtained from the University Center for Atmospheric Research's Research Applications Program website). b) Surface analysis valid at 2100 UTC 19 April 2000. Standard surface model is employed with temperature and dew point temperature in the upper left and lower left, respectively, abbreviated sea level pressure in the upper right, wind direction indicated by the shaft, wind speeds indicated in knots (short barb=5kt; long barb=10kt), sky coverage in the station circle, and cloud symbology when available. Subjective analysis of sea level pressure is contoured (black, solid) every 2 mb, surface temperatures (red, solid) every 5oF, and surface dew point temperatures (green, dashed) every 10oF.