A downdraft is downward moving air, usually the direct result of air convection within the thunderstorm. Downdrafts can be extremely powerful, and some aircraft have crashed as a direct result of downdrafts.
... alveolars like t, but with the tongue curled back) (t, th, d, dh, n)
Dental (tongue against teeth, like Spanish) (t, th, d, dh, n)
Labial (with the lips[?]) (p, ph, ...