Keyword | CPC | PCC | Volume | Score | Length of keyword |
---|---|---|---|---|---|
severe thunderstorm warning today | 0.38 | 0.8 | 877 | 37 | 33 |
severe | 0.91 | 1 | 1102 | 31 | 6 |
thunderstorm | 0.11 | 0.3 | 7818 | 51 | 12 |
warning | 0.19 | 0.5 | 9512 | 98 | 7 |
today | 1.8 | 0.3 | 529 | 67 | 5 |
Thunderstorms form when an air mass becomes so unstable that it overturns ( convects) violently. "Unstable" means that the air in the lowest layers is unusually warm and humid, or that the upper layers are unusually cool, or oftentimes, both .