Hurricane Polo, Second-Most Intense in East Pacific, Bears Down on Baja California as Nolo Strengthens Near Hawaii

On 22 September, Hurricane Polo registered a central pressure of 892 millibars, making it the second-most intense hurricane on record in the east Pacific, according to data cited by MetDesk. Only Hurricane Patricia (2015) has been stronger. The storm is being fuelled by exceptionally warm Pacific waters, which are providing favourable conditions for it to maintain its considerable strength.

Polo is expected to turn west-northwest before taking a more north-westerly trajectory on Saturday. Maximum sustained winds are around 150 mph, with hurricane-force winds extending approximately 40 miles from the centre and tropical storm-force winds reaching up to 125 miles. These winds, combined with torrential rainfall and dangerous seas, could cause significant impacts. Although some fluctuations in intensity are possible, Polo is expected to remain powerful as it tracks northwestwards.

NASA’s Earth Observatory had previously captured images of Polo’s “explosive intensification” off Mexico’s Pacific coast using the Moderate Resolution Imaging Spectroradiometer (MODIS) and sea surface temperature data. The storm was positioned just south of Acapulco, with outer cloud bands extending inland toward Mexico City, though the system has now shifted its trajectory toward the Baja California peninsula.

Meanwhile, in the central Pacific, Hurricane Nolo is strengthening near Hawaii, posing the third hurricane threat to the islands this year. Residents of Hawaii are being urged to monitor the storm’s progress.

Analysis

Why This Matters

Polo’s record intensity and path toward Baja California could bring life-threatening winds, storm surge, and flooding to a region already on alert.
The simultaneous development of Nolo near Hawaii raises concerns about back-to-back hurricane impacts on vulnerable island communities.
Exceptionally warm Pacific waters, linked to broader ocean heating trends, continue to fuel powerful storms.

Background

Hurricane Polo formed off the southwestern coast of Mexico and underwent explosive intensification, as documented by NASA satellite imagery. The storm’s central pressure of 892 millibars places it among the most intense Pacific hurricanes in recorded history. The eastern Pacific hurricane season has been notably active in recent months, with multiple systems developing. Hawaii has already faced two hurricane threats earlier this year.

Key Perspectives

Mexican emergency authorities: Likely focused on evacuation preparations and coastal warnings for Baja California and adjacent states. Hawaii residents and officials: Monitoring Nolo’s track closely; the third hurricane threat of the year has heightened preparedness fatigue. Meteorologists: Stressing the role of exceptionally warm sea surface temperatures in sustaining such intense storms and the difficulty of forecasting rapid intensification.

What to Watch

Polo’s exact trajectory over the weekend — any wobble could bring the core closer to populated areas of Baja California.
Intensity fluctuations: Although Polo is expected to remain strong, eyewall replacement cycles could temporarily moderate or re-energise the storm.
Nolo’s development rate and path toward Hawaii — whether it poses a direct threat to the main islands.

Analysis

Why This Matters

Background

Key Perspectives

What to Watch

Sources