Hector the thundercloud is very predictable. So much so, in fact, that it arrives on a daily basis with almost perfect timekeeping.
Weird Weather Phenomena - Smore Science Magazine
Hector the Convector: The Thunderstorm that is Almost Never Late
Astounding Stories of Super-Science, February, 1930, by Various.
What are some great mysteries that science failed to crack? - Quora
The cloud called Hector - Cloud Appreciation Society
Thunderstorm Dynamics and Hazards, Department of Climate, Meteorology & Atmospheric Sciences
Telling the time using a thundercloud
Chris Littlechild - Grunge
Hector arrives promptly at 3pm. But Hector isn't a person
Stormy science: ND project boosted thunderstorm knowledge, sparked cloud seeding myths, experts say - InForum
Introduction to Tropical Meteorology, Ch. 9: Observation, Analysis, and Prediction: Focus 1: The Australian-Indonesian Monsoon �
9F1.4 The Monsoon over the Maritime Continent �
9F1.4.1 Hector and Convection
Scientist Solves Mystery of Green Lightning, Says It's Surprisingly Common