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 890 
 WTPA43 PHFO 022041
 TCDCP3
  
 Post-Tropical Cyclone Miriam Discussion Number  31
 NWS Central Pacific Hurricane Center Honolulu HI   EP152018
 1100 AM HST Sun Sep 02 2018
  
 Under continued strong vertical wind shear of 45 to 55 kt, limited
 amounts of deep convection have been displaced well to the north of
 the exposed low-level circulation of Miriam for about 24 hours. HFO
 and SAB deemed the system too weak to classify. JTWC gave a Dvorak
 current intensity of 1.0/25 kt, and CIMSS ADT yielded an estimate of
 1.5/25 kt. An overnight ASCAT pass from 0658Z showed a large area of
 30 kt wind retrievals and one near 35 kt. Based on these inputs,
 Miriam will be designated a post-tropical low with an intensity of
 30 kt, and this will be the final advisory for this system.
 
 Miriam is moving toward the northwest (310 degrees) at 10 kt. This
 general motion will continue over the next day or so as a deep ridge
 holds to the northeast and a mid- to upper-level trough remains
 parked to the northwest. This trough will maintain strong
 southwesterly vertical wind shear that will inhibit redevelopment
 of the system, and the post-tropical remnant low should open into a
 trough on Monday. The track and intensity forecasts are in the
 middle of their guidance envelopes near TVCE and ICON,
 respectively. 
  
  
 FORECAST POSITIONS AND MAX WINDS
  
 INIT  02/2100Z 26.4N 144.6W   30 KT  35 MPH...POST-TROPICAL
  12H  03/0600Z 27.3N 146.1W   25 KT  30 MPH...POST-TROP/REMNT LOW
  24H  03/1800Z 28.2N 148.6W   25 KT  30 MPH...POST-TROP/REMNT LOW
  36H  04/0600Z...DISSIPATED
  
 $$
 Forecaster Wroe
  
 
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