How Thunderstorms Form and Lightning Strikes
Vigorous updrafts, ice crystal collisions and powerful electrical channels turn turbulent atmospheric moisture into nature's most intense discharges.
Weather
Weather events, seasons and the science of the sky — reported plainly.
How tornadoes are rated: the Enhanced Fujita scale
Tornadoes receive their strength categories not from direct wind measurements, but from structural damage assessed by ground surveys after the storm.
The frozen ground that defines the planet's coldest biome
Frigid temperatures, permafrost and short growing seasons shape the tundra across polar and alpine landscapes.
How wind chill works, and why it cannot freeze a pipe
The index measures the rate at which moving air strips heat from exposed skin, but inanimate objects can never cool below the actual air temperature.
What the Saffir-Simpson Scale Does Not Measure
The five hurricane categories rate sustained wind speed alone, leaving deadly storm surge and extreme rainfall entirely off the scale.
El Niño and La Niña: How Pacific shifts sway world weather
The two opposing phases of the ENSO climate cycle alter trade winds, shift jet streams and disrupt rainfall patterns across the globe.
What the northern lights actually are
Auroras appear when solar particles collide with atmospheric gases, producing distinct colours based on altitude and chemistry.
Why tropical cyclones get names, and who chooses them
Predetermined lists managed by regional warning centres help forecasters avoid confusion when multiple storms churn across the oceans.
Weather briefing: Atlantic low and US winter outlook
Forecasters track an offshore system near the mid-Atlantic as winter predictions point to widespread seasonal shifts.
How storms get their names, and who keeps the lists
Five regional bodies set tropical cyclone names from pre-agreed lists; the US hurricane centre says an Atlantic name is retired only if a storm is deadly or costly enough.