Figure 3: (a) Observed mean sea-level pressure (mb) for 0000 UTC 29 December 1992  
(b) Observed 700 mb height (m) and temperature (deg C) for 0000 UTC 29 December 1992
(c) Observed 500 mb height (m) and temperature (deg C) for 0000 UTC 29 December 1992

(d) Observed 300 mb height (m) and temperature (deg C) for 0000 UTC 29 December 1992