Real-time coverage of severeStorms event on Pandita Data.
⛈️ OPEN LIVE 3D WEATHER ALERTSThe ocean is breathing fire. Off the coast of Western Australia, warm water rising from the Indian Ocean has begun to spin. Faster. Faster still. What started as scattered thunderstorms three days ago is now a coherent vortex—Tropical Cyclone Narelle—a rotating engine of wind and rain that will soon threaten lives across the continent's northwest. You are standing on a beach near Exmouth. The sky has turned a sickly greenish-grey. Palm fronds snap like bones. The barometer in your chest tells you something ancient and terrible is coming.
This is not random chaos. This is planetary physics at work.
Tropical cyclones form when three conditions align perfectly: warm ocean water (above 26.5°C), low atmospheric pressure, and wind shear so minimal it allows rotation to flourish. In late March, the Indian Ocean near Western Australia has heated to 28–29°C—anomalously warm for the season. A pressure trough drifting south from the Equator created the trigger. Weak upper-level wind shear allowed the storm's nascent spin to organize rather than tear itself apart.
Once organized, Narelle became a self-reinforcing machine. Warm air rises from the ocean surface, cooling as it ascends. That cooling releases latent heat—energy stored in water vapor. This released energy drives stronger updrafts, pulling more moisture from below, feeding more convection. The Coriolis effect, Earth's rotation, curves the inflow winds into a spiral. Within hours, the system had organized into a mesocyclone. Within a day, distinct eyewall convection emerged.
At latitude 30°S and longitude 117.2°E, Narelle now rotates with sustained winds exceeding 165 km/h. The eye—that eerie calm zone at the center—is roughly 25 km across. Pressure at the core has dropped to 950 mb. This is a Category 3 cyclone. Life-threatening.
NOAA's GOES satellites image Narelle every 10 minutes in visible and infrared wavelengths. The cold cloud tops (−60°C and colder) pinpoint updraft intensity. Microwave sensors aboard NOAA and NASA satellites pierce clouds to measure rainfall rates and wind speed. The Bureau of Meteorology's regional Doppler radars in Perth and Karratha capture fine-scale wind structure and mesovortices within the eyewall—the features that spawn violent gusts at landfall.
Pandita Data's 3D weather simulation integrates this live satellite and radar data. You can watch Narelle's eye rotate. See the spiral rainbands stretch across 400 km. Watch wind speed change with height. Understand not just that a cyclone is coming, but why it organized, where its energy comes from, and how local topography will steer the rainfall when it moves inland.
Roughly 80 tropical cyclones form globally each year. The Southern Hemisphere's cyclone season peaks November–April. Warming oceans have intensified the strongest storms; Category 4–5 cyclones have become more frequent. Australia's northwest coast, exposed to the Indian Ocean, sees an average of 4 cyclones per season.