Figure 8. ETA 24-hr forecast composite chart valid at 0000 UTC 3 July 1997. Displayed parameters are as follows: 500 mb isotachs (in dashed blue) contoured every 20 kts starting at 40 kts, area > 80 kts filled, jet axis in blue; 850 mb isotachs (in dashed yellow) contoured every 10 kts starting at 20 kts with area > 40 kts red filled, jet axis in red; mean sea-level pressure (in green) contoured every 2 mb.