December 21 in weather history

Cyclone Tracy

December 21, 1974 · Darwin

Severe Tropical Cyclone Tracy was a small but destructive tropical cyclone that devastated the city of Darwin, in the Northern Territory of Australia, in December 1974. The small but developing easterly storm was originally expected to pass clear of the city, but it turned towards it early on 24 December. After 10:00…

The record

Date
December 21, 1974
Ended
December 26, 1974
Kind
Tropical cyclone
Where
Darwin

What happened

Severe Tropical Cyclone Tracy was a small but destructive tropical cyclone that devastated the city of Darwin, in the Northern Territory of Australia, in December 1974. The small but developing easterly storm was originally expected to pass clear of the city, but it turned towards it early on 24 December. After 10:00 p.m. ACST, damage became severe, with wind gusts reaching 217 km/h (117 kn; 135 mph) before instruments failed. The anemometer in Darwin Airport control tower had its needle bent in half by the strength of the gusts.

Residents of Darwin were celebrating Christmas, and they did not immediately acknowledge the emergency, partly because they had been alerted to an earlier cyclone (Selma) which passed west of the city, not affecting it in any way. Additionally, news outlets had only a skeleton crew on duty over the holiday.

From Wikipedia, “Cyclone Tracy”, CC BY-SA 4.0.

Sources

Wikidata Q245544 (CC0); text from Wikipedia, “Cyclone Tracy”, CC BY-SA 4.0.