What situation may result in the occurrence of severe wind shear?

Question

Question Quiz BPL Gas - Balloon Pilot License - Meteorology

QuizVDS · Accepted Answer

When a shower is visible close to the airfield

QuizVDS · Answer

Cross-country flying below Cu clouds with about 4 octas coverage

QuizVDS · Answer

During final approach, 30 min after a heavy shower has passed the airfield

QuizVDS · Answer

Flying ahead of a warm front with visible Ci clouds

Id 295 - BPL Gas - What situation may result in the occurrence of severe wind shear?