The National Hurricane Center has issued updated wind speed probability graphics for Tropical Storm Bertha, providing forecasters and the public with the latest outlook on where dangerous winds may develop.
The graphics depict the probability of 34-knot winds — the threshold for tropical storm-force conditions — across a 120-hour forecast window. These probability maps are a key tool used by meteorologists to assess the potential reach of a tropical system.
According to the National Hurricane Center, the wind speed probability data was last updated on Tuesday, July 21, 2026, at 3:22 a.m. GMT. Residents in potentially affected areas are encouraged to monitor the latest updates from the National Hurricane Center as the storm continues to develop.
