Typhoon Sanvu Update #6

Sanvu continues to intensify and has been upgraded into a Typhoon by the JTWC (still a Tropical Storm for JMA). The center was last located approximately 760km south southwest of Iwo To, Japan. Maximum sustained winds are now at 120kph gusting to 150kph. TY Sanvu is moving north northwestward at 15kph.

MWI from SSMI-S (NRLMRY)

The main reason for the upgrade was the recent development of an eye on the 37Ghz microwave image (seen above). Another version of the image, 87ghz, still shows that the mid-level eyewall is not yet complete. Convective activity remains good with warming cloud tops seen near the center which could indicate the continuous development of an eye. The southwestern periphery has also improved and the storm is becoming more symmetric.

Forecast track hasn't changed and we still expect Sanvu to continue intensifying for another day or so. It should also turn more to the northeast as it interacts with an approaching trough. It is forecast to move within 200km of Iwo To, Japan by late Friday evening or early Saturday morning.

We'll have another update later this afternoon.
_______________________________________
Issued (2130 UTC) 530am PhT 052412