Eastern Pacific Tropical Weather Outlook

540
ABPZ20 KNHC 200558
TWOEP 
Tropical Weather Outlook
NWS National Hurricane Center Miami FL
1100 PM PDT Sat Sep 19 2026
For the eastern and central North Pacific east of 180 longitude:
Southwest of Southwestern Mexico (EP99):
Showers and thunderstorms associated with a broad area of low 
pressure located about 400 miles south-southwest of Manzanillo, 
Mexico have become better organized over the past several hours. 
However, satellite-derived winds do not yet show a well-defined 
circulation. Environmental conditions remain conducive for 
development, and a tropical depression is likely to form within the 
next day or so as the system moves generally northward off the coast 
of southwestern Mexico. Interests along the southwestern and 
west-central coast of Mexico should monitor its progress. For more 
information, including gale warnings, see the High Seas Forecast 
issued by the National Weather Service.
* Formation chance through 48 hours...high...90 percent.
* Formation chance through 7 days...high...90 percent.
Western East Pacific (EP98):
Showers and thunderstorms associated with an area of low pressure 
located well southwest of the Baja California Peninsula are becoming 
better organized. Environmental conditions are conducive for 
development, and a tropical depression is expected to form over the 
next day or so as it moves westward to west-northwestward at 10 to 
15 mph across the western East Pacific.
* Formation chance through 48 hours...high...90 percent.
* Formation chance through 7 days...high...90 percent.
Well East-Southeast of the Hawaiian Islands (Former TD 15-E):
Showers and thunderstorms associated with the remnants of Tropical 
Depression Fifteen-E, located well east-southeast of the Hawaiian 
Islands, remain limited. Environmental conditions appear conducive 
for some development of this system next week as it moves westward 
to west-southwestward, and a tropical depression could form to the 
south or southeast of the Hawaiian Islands by the middle to latter 
part of next week.
* Formation chance through 48 hours...low...near 0 percent.
* Formation chance through 7 days...medium...60 percent.
&&
High Seas Forecasts issued by the National Weather Service
can be found under AWIPS header NFDHSFEPI, WMO header FZPN02 
KWBC, and on the web at ocean.weather.gov/shtml/NFDHSFEPI.php