ZCZC HFOTCDCP3 ALL
TTAA00 PHFO DDHHMM
 
Tropical Storm Henriette Discussion Number  36
NWS Central Pacific Hurricane Center Honolulu HI   EP082025
Issued by NWS National Hurricane Center Miami FL
500 PM HST Tue Aug 12 2025
 
Henriette is unraveling quickly. Since the prior advisory, its 
low-level circulation has become decoupled northwest from the 
remaining deep convection that is decreasing in coverage and 
intensity. An earlier scatterometer pass had a peak wind of 47 kt, 
but its likely Henriette has been weakening since that time. 
Subjective Dvorak estimates are decreasing as fast as they are 
allowed, and the initial intensity this advisory has been decreased 
to 45 kt, close to the most recent SATCON value.

Henriette continues to move rapidly to the northwest, estimated at 
315/16 kt. This general motion should continue for another 12-24 h, 
though now that the circulation has become more shallow, it is
expected to now turn northward and then eastward around a large 
low-level subtropical ridge until it dissipates. Vertical wind 
shear diagnosed by SHIPS guidance is already near 20 kt in the 
direction of very dry mid-level air. This shear increases further 
from here on out, and both the global and regional-hurricane models 
show deep convection not returning over the small low-level vortex 
as it also moves over cooling sea-surface temperatures. Thus, the 
latest NHC forecast will show Henriette becoming post-tropical in  
12 h, and dissipating entirely by 72 h, with its final resting 
place near the center of the North-Central Pacific subtropical 
ridge. The NHC track forecast is roughly in the middle of the track 
guidance envelope. 
 
 
FORECAST POSITIONS AND MAX WINDS
 
INIT  13/0300Z 35.3N 164.3W   45 KT  50 MPH
 12H  13/1200Z 37.1N 166.3W   35 KT  40 MPH...POST-TROPICAL
 24H  14/0000Z 39.6N 168.3W   25 KT  30 MPH...POST-TROP/REMNT LOW
 36H  14/1200Z 41.8N 169.2W   20 KT  25 MPH...POST-TROP/REMNT LOW
 48H  15/0000Z 43.4N 168.6W   20 KT  25 MPH...POST-TROP/REMNT LOW
 60H  15/1200Z 43.5N 166.5W   15 KT  15 MPH...POST-TROP/REMNT LOW
 72H  16/0000Z...DISSIPATED
 
$$
Forecaster Papin
 
NNNN