Tropical Weather Outlook: 2 areas being monitored, up to 70% development odds
Issued Sep 21, 2026 at 05:27 UTC by the National Hurricane Center · new outlooks every 6 hours
StormTracking analysis
The 2026 season has produced 20 storms so far — behind the 2015–2025 average of 26.5 by this date.
- New area in the Eastern Pacific: 1. East-Southeast of the Hawaiian Islands (Former TD 15-E) — 70% 7-day odds
- New area in the Eastern Pacific: 2. South of the Gulf of Tehuantepec — 30% 7-day odds
- No longer tracked: 1. Southwest of Southwestern Mexico (EP99) (Eastern Pacific)
- No longer tracked: 2. Well East-Southeast of the Hawaiian Islands (Former TD 15-E) (Eastern Pacific)
Development areas (2)
Eastern Pacific
1. East-Southeast of the Hawaiian Islands (Former TD 15-E) 48h 0% 7-day 70%
1. East-Southeast of the Hawaiian Islands (Former TD 15-E): Showers and thunderstorms remain disorganized in association with the remnants of Tropical Depression Fifteen-E, located several hundred miles to the east-southeast of the Hawaiian Islands. Environmental conditions are forecast to become more conducive for development of this system by the middle to latter portion of this week, and a tropical depression is likely to form by that time to the south or southeast of the Hawaiian Islands as the system moves generally westward at 10 to 15 mph. Formation chance through 48 hours...low...near
Eastern Pacific
2. South of the Gulf of Tehuantepec 48h 0% 7-day 30%
2. South of the Gulf of Tehuantepec: An area of low pressure could form in a few days to the south of the Gulf of Tehuantepec. Thereafter, environmental conditions appear favorable for gradual development while the system moves slowly west-northwestward to northwestward, parallel to the coast of southern and southwestern Mexico. Formation chance through 48 hours...low...near 0 percent. Formation chance through 7 days...low...30 percent.
Official NHC text — Atlantic
en Español
598
ABNT20 KNHC 210524
TWOAT
Tropical Weather Outlook
NWS National Hurricane Center Miami FL
200 AM EDT Mon Sep 21 2026
For the North Atlantic...Caribbean Sea and the Gulf of America:
Active Systems:
The National Hurricane Center is issuing advisories on Tropical
Storm Fay, located several hundred miles southwest of the Azores.
Tropical cyclone formation is not expected during the next 7 days.
$$
Forecaster Kelly
Source: NOAA/NWS National Hurricane Center (public domain). Analysis above is StormTracking's own.
Official NHC text — Eastern Pacific
en Español
000
ABPZ20 KNHC 210527
TWOEP
Tropical Weather Outlook
NWS National Hurricane Center Miami FL
1100 PM PDT Sun Sep 20 2026
For the eastern and central North Pacific east of 180 longitude:
Active Systems:
The National Hurricane Center is issuing advisories on Tropical
Storm Odalys, located located over a thousand miles west-southwest
of the southern tip of Baja California, and recently upgraded
Tropical Storm Polo, located a few hundred miles south of
Manzanillo, Mexico.
East-Southeast of the Hawaiian Islands (Former TD 15-E):
Showers and thunderstorms remain disorganized in association with
the remnants of Tropical Depression Fifteen-E, located several
hundred miles to the east-southeast of the Hawaiian Islands.
Environmental conditions are forecast to become more conducive for
development of this system by the middle to latter portion of this
week, and a tropical depression is likely to form by that time to
the south or southeast of the Hawaiian Islands as the system moves
generally westward at 10 to 15 mph.
* Formation chance through 48 hours...low...near 0 percent.
* Formation chance through 7 days...high...70 percent.
South of the Gulf of Tehuantepec:
An area of low pressure could form in a few days to the south of the
Gulf of Tehuantepec. Thereafter, environmental conditions appear
favorable for gradual development while the system moves slowly
west-northwestward to northwestward, parallel to the coast of
southern and southwestern Mexico.
* Formation chance through 48 hours...low...near 0 percent.
* Formation chance through 7 days...low...30 percent.
&&
Public Advisories on Tropical Storm Odalys are issued under WMO
header WTPZ31 KNHC and under AWIPS header MIATCPEP1.
Forecast Advisories on Tropical Storm Odalys are issued under WMO
header WTPZ21 KNHC and under AWIPS header MIATCMEP1.
Public Advisories on Tropical Storm Polo are issued
under WMO header WTPZ32 KNHC and under AWIPS header MIATCPEP2.
Forecast/Advisories on Tropical Storm Polo are issued
under WMO header WTPZ22 KNHC and under AWIPS header MIATCMEP2.
$$
Forecaster Kelly
Source: NOAA/NWS National Hurricane Center (public domain). Analysis above is StormTracking's own.