Abstract: With the infrared radiation as heat source and cigarette smoke as absorbing substance pumped in a rotating box filled with air, tropical storms are formed experimentally in the box. The temperature and velocity distribution are measured, being quite similar with those of true tropical storms. The velocity outside the eye wall satisfies the relation Vrn=constant,n being about p.5(fig. 2).The areal distribution of the cyclonic circulation with height of the experimental storms has also been measured, also agreeing quite well with the observed ones.The downward current (fig. 6) within the eye and the small disturbances (left side of fig. 4) have been observed in the experimental storms.