A radar 'picture' can give an accurate representation of the size of the storm - and which direction it's moving.
They use include satellites, rain gauges, Airborne Lasers and Weather Radars
to measure
volume
A thermometer.
they use it to measure amounts of fluids and what not
something
hydrophone
They use a tri beam scale.
They would use a rain gauge.
The units that scientists use to measure temperature are: Celsius Fahrenheit Kelvin
Centimeters
Balance