Fog enveloped Broome last night and into this morning, causing a few air traffic delays. Usually, a high pressure system in the Bight directs southeasterly winds to Broome meaning winds are mostly offshore. These winds become lighter at night, but are still generally offshore. However, the passage of the trough to the south made winds light, and local-scale effects dominated. A strong sea breeze established yesterday afternoon. These winds glided over a warmer-than-usual sea surface, sharply raising the dew points in Broome. At night, the winds calmed rapidly. Around 11:30pm, the surface layer of air cooled enough for water to condense, and fog formed. From 11:30pm to 2:30am, visibility was hardly over 500 metres. At 1:30am, visibility plummeted to just 50 metres. This fog shrouded the airport for several hours, clearing only at sunrise, around 5:45am. Luckily, a high pressure ridge will rebuild from Saturday, lessening the potential for fog to form.