Pacific Storms Intensify with Record Cyclone Activity
NASA satellite data shows unprecedented tropical storm frequency in 2026 season.
1Unprecedented cyclone count
By September 28, 2026, the northeastern and central Pacific basins recorded 20 named storms - nearly 50% above the 1991-2020 average of 13.5. Nine reached hurricane strength, compared to the typical 7.4. NASA's EPIC camera on the DSCOVR satellite captured the basin teeming with simultaneous storm systems, including Hurricane Nolo near Hawaii and Hurricane Polo approaching Mexico's Baja California peninsula.
2Polo's rapid intensification
Hurricane Polo underwent extreme rapid intensification over unusually warm waters, reaching Category 5 status on September 22 before weakening to Category 2 at landfall. The storm made initial contact with Baja California Sur on September 28, then crossed to mainland Mexico near Guaymas on September 29. The National Hurricane Center warned of dangerous winds, storm surge, and flood risks across Baja California and Sonora.
3Compound weather threats
Polo's remnants combined with moisture from Post-Tropical Cyclone Odalys to create extended flood risks across the southwestern U.S. and southern Plains. Meanwhile, Tropical Storm Rachel paralleled Mexico's coast, generating dangerous surf conditions. This clustering of storms created overlapping hazards rarely seen in previous seasons, with multiple systems affecting land simultaneously.
4Hawaii's repeated drenching
Hurricane Nolo became the third system of the season to impact Hawaii, dropping over 12 inches (30 cm) of rain on Maui and the Big Island. While causing flooding and landslides, it proved less destructive than August's Hurricane Lala. NASA's Disasters Program is supporting FEMA and Hawaii with satellite-derived maps through its open-access portal to aid response efforts.
5Energy metrics double norms
Colorado State University data shows accumulated cyclone energy in the Northeast Pacific exceeded twice the normal value by September 28. This metric accounts for both storm frequency and intensity, indicating the 2026 season's exceptional activity. The elevated baseline reflects sustained conditions favoring cyclone formation rather than isolated extreme events.
6El Niño's clear fingerprint
Scientists attribute the heightened activity to the ongoing El Niño, established since June. The phenomenon's characteristic warm equatorial waters and reduced wind shear create ideal cyclone development conditions. These basin-wide patterns differ from localized anomalies, suggesting the active season may persist through its traditional November conclusion.
7Operational response coordination
NASA's Earth Science Division is providing near-real-time satellite data to emergency managers through partnerships with FEMA and state agencies. The VIIRS instrument on Suomi NPP and EPIC on DSCOVR offer complementary perspectives - VIIRS provides high-resolution imagery while EPIC maintains continuous hemisphere-wide monitoring from Lagrange point 1.
8New baseline for risk assessment
The 2026 season challenges historical averages used for infrastructure planning and insurance models. With multiple storms exhibiting rapid intensification and concurrent land impacts, emergency planners face compound disasters that strain response capacity. The season may prompt revisions to building codes and flood zone designations across Pacific coastal regions.
Original article: NASA — Pacific Storms Intensify with Record Cyclone Activity