The tropical depression (05W) that became tropical storm Guchol yesterday formed southeast of Guam on June 11, 2012.

TRMM had a fairly good daytime look at Guchol on June 13, 2012 at 0500 UTC. TRMM's Microwave Imager (TMI) data revealed that Guchol contained a large area of moderate to heavy rainfall. Guchol is expected to continue moving toward the northwest, slowly intensify and reach minimal typhoon strength on June 14, 2012.