‘“One impact is that the Boulder Internet Time Services no longer have an accurate time reference,” Sherman added. As a result, the U.S. official time slowed by around 4.8 microseconds’
Gizmodo
Colorado Windstorm Causes 4.8 Microsecond Glitch in Official US Time
A destructive windstorm disrupted the power supply to more than a dozen atomic clocks that keep official time in the United States.