Consider the following statements: 1. Jet streams occur in the Northern Hemisphere only. 2. Only some cyclones develop an eye. 3. The temperature inside the eye of a cyclone is nearly 10°C lesser than that of the surroundings. Which of the statements given above is/are correct?

1. Statement 1 is incorrect. Jet streams are high-altitude air currents found in both the Northern Hemisphere and the Southern Hemisphere. 2. Statement 2 is correct. A well-defined 'eye' is characteristic only of strong tropical cyclones (hurricanes/typhoons). Weaker storms or other types of cyclones may lack a distinct eye. 3. Statement 3 is incorrect. The air within the eye of a cyclone sinks, warms, and clears. Consequently, the temperature inside the eye is significantly warmer, not 10°C lesser, than in the surrounding eyewall. 4. Therefore, only statement 2 is correct.