A NASA satellite provided a look at heavy rainfall occurring in a tropical low pressure system as it was consolidating and strengthening into what became Tropical Storm 3S in Southwest Indian Ocean.On January 26 the Joint Typhoon Warning Center (JTWC) warned that System 90P, a low pressure area moving westward over northwestern Australia would strengthen into a tropical cyclone and by January 27 it had become Tropical Cyclone 3S.The warm waters of the Southern Indian Ocean and low vertical wind shear are providing a good environment for tropical cyclone development.