2017 · Q103
Which one of the following is NOT a favourable condition for occurrence of a thunderstorm?
indian-world-geographyclimatology
- AConditional and convective instability
- BAdequate supply of moisture in the lower atmosphere
- CAdvection of cold dry air in the lower troposphere and warm moist air in the upper troposphere
- DA synoptic situation of low level convergence and upper level divergence
Explanation
Thunderstorm formation needs conditional or convective instability, abundant low-level moisture, and low-level convergence with upper-level divergence. Statement (C) inverts the required thermal structure: the favourable setup is warm moist air below with cold dry air aloft, not the reverse. Hence (C) is NOT a favourable condition.