Advisories

000
WTPA44 PHFO 100851
TCDCP4
 
Tropical Storm Lowell Discussion Number  57
NWS Central Pacific Hurricane Center Honolulu HI   EP122026
Issued by NWS National Hurricane Center Miami FL
1100 PM HST Wed Sep 09 2026

Proxy-visible and infrared satellite images show that Lowell is 
producing minimal convection on the northern side of the storm. The 
center of the cyclone is exposed and based on water vapor imagery, 
plenty of dry air has made its way to the center. Nonetheless, a 
recent ASCAT pass showed a large area of 50-53 kt vectors to the 
northwest of the center, indicating that Lowell was stronger than 
previously estimated. Based on this data, the initial intensity has 
been set to 55 kt.
 
The storm is continuing to move to the west around 280 degrees at 12 
kt. Currently the cyclone is being guided by a low- to mid-level 
ridge located to the north, which should keep it on this westward 
heading for the next couple of days. After that, a mid- to 
upper-level trough to the northwest is expected to cutoff and become 
the main steering flow for Lowell. This should result in a northerly 
turn for the storm as it interacts with the cutoff low around 36-48 
h. As the cutoff low moves off to the east, Lowell should take up a 
more westward motion for a short period of time. Then, once the 
cutoff low pulls away completely, the shallow circulation of Lowell 
will likely be stuck between two low-level ridges, thus leaving the 
storm to drift slowly off to the south as a remnant low. The current 
NHC track forecast is very close to the previous one, however there 
were some small nudges made to the new track forecast after 36 h. 
This prediction is close to the most recent Google DeepMind (GDMI) 
and HFIP Corrected Consensus Approach (HCCA) aids.
 
The cyclone is expected to remain in a hostile environment with 
moderate wind shear, plenty of dry air, and marginal SSTs. 
Therefore, a gradual weakening trend is expected for the next 24 h. 
Based on the simulated satellite imagery from the GFS and ECMWF, 
Lowell could lack enough convection to be considered a tropical 
cyclone. However, some positive interaction with the previously 
mentioned cutoff low could foster the development of new convection, 
which in turn could allow for Lowell to maintain its intensity 
through baroclinic processes. After 60-72 h, the cyclone will be on 
the subsident side of the cutoff low, which will likely lead to the 
storm becoming post-tropical as the convection dissipates. It should 
be noted that there is a fair chance that the convection fails to 
regenerate due to the dry air and shear, and thus Lowell could 
become post-tropical sooner than forecast. The updated NHC intensity 
forecast shows no net intensity change between 24-72 h, although 
small fluctuations could occur as described above.
 
 
KEY MESSAGES:
 
1. Post-storm safety: Follow advice of local officials and avoid
areas of downed power lines and flooding. Ensure generators are
properly ventilated and placed outside at least 20 feet away from
dwellings and garages to avoid carbon monoxide poisoning. During
clean up, be careful when using chainsaws and power tools. Drink
plenty of water to avoid heat exhaustion.
 
 
FORECAST POSITIONS AND MAX WINDS
 
INIT  10/0900Z 29.2N 166.2W   55 KT  65 MPH
 12H  10/1800Z 29.2N 168.2W   45 KT  50 MPH
 24H  11/0600Z 29.3N 170.2W   40 KT  45 MPH
 36H  11/1800Z 30.1N 171.6W   40 KT  45 MPH
 48H  12/0600Z 31.4N 172.1W   40 KT  45 MPH
 60H  12/1800Z 33.0N 172.8W   40 KT  45 MPH
 72H  13/0600Z 33.4N 173.9W   40 KT  45 MPH
 96H  14/0600Z 32.8N 175.1W   30 KT  35 MPH...POST-TROP/REMNT LOW
120H  15/0600Z 31.4N 175.0W   25 KT  30 MPH...POST-TROP/REMNT LOW
 
$$
Forecaster Katz/Reinhart