STS Sanvu Morning Update

Severe Tropical Storm Sanvu continues to move closer to the Ogasawara Islands of Japan. The center was last located approximately 430km southwest of Iwo To, Japan. Maximum 10-min sustained winds are at 95kph with gusts of up to 130kph (130kph gusting to 155kph for JTWC). Sanvu is currently moving northward at around 15kph.

IR Image from NRLMRY


The infra-red image above shows the ragged eye of Sanvu. A microwave image (not shown here) also shows a partially-closed eyewall. The storm continues to exhibit good outflow and strong convective activity, particularly on the northeastern quadrant. Conditions remain favorable and should help Sanvu maintain its present strength, if not intensify a little bit, for at least another 12 to 24 hours.

We expect Sanvu to start turning to the northeast later today as it rounds the Sub-Tropical Ridge. It will pass within 200km of Iwo To, Japan tomorrow morning (Saturday). Then, strong wind shear and marginal sea-surface temperatures should quickly weaken Sanvu. It is forecast to become an extra-tropical storm as early as Sunday.

We’ll have more updates throughout the day so keep checking back to our site. Stay safe!

-WxCaster PAT

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