Assertion: tropical cyclone | /r/HasProperty | defined within the region
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Source sentences:
text: Within the region a tropical cyclone is defined as being a non frontal synoptic scale cyclone, that originates over tropical or subtropical waters with organized convection and a definite cyclonic surface wind circulation.
text: Within the region a tropical cyclone is defined as being a non-frontal low pressure system of synoptic scale that develops over warm waters, with a definite organized wind circulation and 10-minute sustained wind speeds of 34 kn (63 km/h; 39 mph) or greater near the centre.