The storm continued to strengthen, reaching its peak intensity of 80 mph (130 km/h) and a minimum central pressure of 977 mbar (28.9 inHg) at 18:00 UTC on the same day.

Pablo and its parent low-pressure system brought gale- and storm-force winds to portions of the Azores.

In the British Isles, Pablo's remnants merged with another extratropical cyclone, which caused heavy rain and wind gusts over 80 mph (130 km/h).

[5] ASCAT data showed that Pablo contained a well-defined circulation, and satellite imagery revealed that the storm developed a central dense overcast with occasional hints of an eye.

[1][6] Based on this information, the NHC determined that Pablo had transitioned into a fully tropical cyclone at 18:00 UTC on October 25.

[1] Early on that day, an ASCAT pass showed that Pablo had intensified further to 65 mph (105 km/h), despite the storm's cloud pattern deteriorating slightly.

[1][3][12] Pablo defied predictions and continued to intensify, reaching its peak intensity of 80 mph (130 km/h) and a minimum central pressure of 977 mbar (28.9 inHg) at 18:00 UTC that same day.

[1] The NHC described Pablo's appearance as ""remarkably impressive", and a ring of −58 °F (−50 °C) cloud tops surrounded the distinct eye of the hurricane.

[15] The storm quickly approached the northeastern side of the parent baroclinic low, nearing a frontal area.

[14] Pablo subsequently degenerated into a weak extratropical cyclone, after merging with the aforementioned front at 12:00 UTC on October 28.

Additionally, throughout the storm's life, very cold air high in the atmosphere increased instability, which allowed for convection to encircle Pablo's eye.

[25] Prior to post-analysis, Pablo was never designated as a subtropical storm, as the NHC had classified it as fully tropical by its first advisory.

[6] The Portuguese Institute for the Sea and Atmosphere (IMPA) warned of strong winds and high waves from Pablo and its parent extratropical cyclone.

[30] Pablo and its parent low-pressure system caused gale-force and storm-force winds over the Azores Islands.

[33] A Met Éireann meteorologist noted that the moisture associated with the new system was tropical in nature, and warned of heavy rains.

A total of 265 flights were delayed at London's Heathrow Airport, and thousands of people were affected by power outages in Cornwall and North Devon.