rmks/
1. For meteorologists.
2. 12 hour summary and analysis.
   A. TY 13w made landfall (in a surface observation sparse region) at
18/18z approximately 50 nm south of wenzhou, China. TY 13w has weakened
rapidly (over 3000 to 5000 foot mountains) due to land interaction and
strong vertical wind shear associated with the approaching midlatitude
shortwave. The system has continued to track northwestward and has
accelerated slightly while beginning extra-tropical transition (et).
   B. TY 13w is tracking under the steering influence of a deep
subtropical ridge and is tracking along the western periphery of the
ridge. Upper-level analysis indicates that the shortwave trough is
located just west of the system and continues to propagate east at
10-15 knots. The current position is based on multispectral satellite
imagery depicting tightly-curved banding with a shrinking core of
deep convection. There is good confidence in the position and motion.
The current intensity is based on Dvorak estimates ranging from 65
knots to 90 knots.
3. Forecast reasoning.  
   A. No significant changes to the forecast philosophy since the
previous prog. 
   B. TY 13w is forecast to continue under-going et and is expected
to complete et between tau 24 and tau 36 assuming it survives as a
tropical system. The system will continue weakening rapidly over
rough terrain and may dissipate as a tropical system over China.
Current guidance indicates that TY 13w will complete et and track
over the Yellow Sea as a weak extra-tropical low. The available
dynamic aids are in good agreement with the track. 
Forecast team: Alpha//