The short answer: A storm can weigh anywhere from thousands of tons to hundreds of millions of tons, depending on its type, with large thunderstorms holding millions of tons of water and tropical systems far more.
Storm weight by type
A storm's weight is mostly the mass of water it carries as cloud droplets, ice, and rain. The total varies hugely between a small shower and a vast tropical system.
| Storm type (example) | Rough water weight |
|---|---|
| Small rain shower | thousands of tons |
| Large thunderstorm | hundreds of thousands to millions of tons |
| Severe storm system | tens of millions of tons |
| Tropical storm or hurricane | hundreds of millions+ tons |
What affects storm weight
- Storm type. A small shower and a hurricane differ by many orders of magnitude.
- Size. A larger storm covers more area and holds more water.
- Water content. Suspended droplets and ice make up most of the weight.
- Intensity. Stronger storms carry and lift more moisture.
- Duration. Longer-lived storms cycle far more water over time.
How storm weight compares
A single large thunderstorm can hold water weighing as much as a million cars, while a tropical system can carry hundreds of times more.
Frequently asked questions
What makes up most of a storm's weight?
Most of a storm's weight is the water it carries as cloud droplets, ice, and rain. The amount depends heavily on the storm's size and type.
Why do storm weights span such a huge range?
Storms range from small local showers to vast tropical systems hundreds of kilometers wide. That huge variation in size leads to a correspondingly broad range of weights.
Is a thunderstorm or a hurricane heavier?
A hurricane is far heavier, since it is enormously larger and holds much more water. A single thunderstorm is only a small fraction of that mass.
