Natural gas is mostly methane. In my piece on the Cornell study, my subhed was âLeakage of methane from fracking boosts shale gas global warming impact.â I didnât note until several paragraphs later that âNatural gas is composed largely of methane,â which comes from the second sentence of the study itself.
Tornado strength is currently measured on what is called the Enhanced Fujita Scale (adapted from the simpler Fujita Scale in 2007), which gives the tornado a rating from 0 to 5 based on estimated wind speeds and the severity of the damage.
Tornado Forecasts. Every twelve hours, meteologists send up weather balloons to take what is called a sounding of the atmosphere. The balloons carry equipment to measure conditions such as atmospheric stability, temperature, and humidity. Using these measurements, forecastors can tell if a tornado is likely to form.