It doesn't take a long time for the fault to restrengthen after you weaken it.
From the sciencedaily.com
The hurricane began to restrengthen, and a third 90-knot intensity peak was noted around 1200 UTC that day.
From the al.com
The majority of extratropical cyclones tend to restrengthen after completing the transition period.
From the en.wikipedia.org
All of these reports occurred as Georges moved out of Cuba and into the Florida Straits where it began to restrengthen.
From the al.com
The shear abated, and Jeff was able to restrengthen, becoming a storm on the 27th and a typhoon on the 29th.
From the en.wikipedia.org
As the cyclone became warm core, Gordon was able to restrengthen into a tropical storm after the monsoon wind surge slackened.
From the en.wikipedia.org
John would go on to restrengthen into a strong Category 1 hurricane after reentering the Central North Pacific, defying all JTWC predictions.
From the en.wikipedia.org
Continuing to track south-southwestward as it weakened, it crossed an area of lower vertical wind shear and began to restrengthen near the northern tip of Madagascar on December 23.
From the en.wikipedia.org
During this time, the remnant low regenerated slightly, but didn't restrengthen into a tropical depression, and the system dissipated on October 11 near Hong Kong.