Ch. III · Frontology Pressure trace & frontal passage
FIG. 03 / 12
Observation · Bergen School, 1924

Pressure falls before the front speaks.

Mean sea-level pressure7-day trace, Station SN02 · 14–20 Oct 1924
hectopascals · hPa
1020 1015 1010 1005 1000 995 990 1018 1016 1013 1008 1002 1001 COLD-FRONT PASSAGE 994 hPa · −2.4 / 3h 14 OCT 15 OCT 16 OCT 17 OCT 18 OCT 19 OCT 20 OCT
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