(a)	(b)
(c)	(d)
Figure 4. Mean sea level pressure (mb) and average pressure change (dashed, mb hr^-1) over the past 6 hours on 4 Jan at (a) 0000 UTC, (b) 0600 UTC, (c) 1200 UTC, (d) 1800 UTC. Output is from the Eta model run of 1200 UTC 3 Jan.