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Text Update
Tropical Storm Prapiroon (Bagyong Nina) is now moving moving at a faster speed and is currently impacting the Ryukyu Islands. The system was last located approximately 240km southeast of Naha, Okinawa or about 850km east northeast of Basco, Batanes. Maximum sustained winds are at 95kph with gusts of up to 120kph. TS Prapiroon is moving north northeast at 15kph.
IR Image from NRLMRY
Latest satellite image shows the core of Prapiroon is devoid of any strong convective activity. Much of the action is fragmented and spread away from the center. Nevertheless, the system is still packing punch and good outflow and weak wind shear is still helping the system sustain much of the intensity it once had. As can be seen on the image above, some of those clouds are now moving into Okinawa and the rest of the Japanese Islands bringing stormy conditions with them.
Radar from JMA
Latest radar out of Okinawa shows bands of light to moderate rains moving across Okinawa, Amami, and nearby islands. Stations here are already reporting 50mm of rain in the past 6 hours alone and more could be on the way. We expect as much as 100 or even 150mm of rain to fall by tomorrow. Along with the heavy rains, winds of up to 100kph have also been recorded in the islands. These stormy conditions will persist throughout the night affecting Okinawa, Amami, Daito, and the nearby islands in the Ryukyus. We expect weather conditions to quiet down later tomorrow as Prapiroon moves away to the northeast. For more radar images, warnings, and forecasts for Japan, please click HERE (JMA Website)
Forecast Track (NOT OFFICIAL!)
Tropical Storm Prapiroon is forecast to continue moving north northeastward tonight but then should make a turn to the northeast and east northeast by tomorrow. The system is forecast to pass well south of Mainland Japan by Friday and Saturday but could still bring light showers and rough surf along the coast. It will also accelerate as it encounters strong westerly winds in the region. By Saturday and Sunday, Prapiroon is forecast to complete extra-tropical transition as it moves across the Northern Pacific.
We'll have another update on Prapiroon tomorrow. Please continue to check with your local officials for the latest updates and warnings in your area. Stay safe!
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Issued (10 UTC) 6pm PhT 101712
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