Assertion: thunderstorm | /r/CapableOf | build to altitudes of 40 000–50 000 ft
Facets:
value: often
type: TEMPORAL
Source sentences:
text: Thunderstorms often build to altitudes of 40 000–50 000 ft in midlatitudes and to even greater heights in the Tropics ; only the great stability of the lower stratosphere limits their upward growth.