English: Fog in the Tay estuary. This view south from the summit of Dundee law shows a temperature inversion in the river estuary. Normally it is possible to see across the river to Fife. On this June morning cold air had crept from the sea into the river mouth (not an uncommon event especially in summer when sea haar spoils many a fine day in Dundee) and only a tiny fragment of Fife is visible above it.