The National Hurricane Center in Miami issued its fifth wind speed probability update for Tropical Storm Arthur on Wednesday, June 17, 2026, at 3:00 p.m. Coordinated Universal Time.
At the time of the advisory, the center of Tropical Storm Arthur was positioned near latitude 28.6 North and longitude 95.8 West, with maximum sustained winds of approximately 35 knots — equivalent to 40 miles per hour or 65 kilometers per hour.
The advisory outlines the probability of locations experiencing sustained wind speeds reaching at least 39 mph (tropical storm force), 58 mph, or 74 mph over the next five days. These probabilities are broken down into individual time periods as well as cumulative chances from Wednesday through the following Monday.
Among the locations listed in the probability table, Galveston, Texas, carries the highest cumulative chance of seeing tropical-storm-force winds at 16 percent. Cameron, Louisiana, follows with a 7 percent cumulative probability, while Matagorda, Texas, also shows a 7 percent cumulative chance. Port O’Connor, Texas, has the lowest listed probability at 3 percent cumulative.
None of the listed locations showed meaningful probabilities for winds reaching 58 mph or higher, suggesting Arthur is not expected to significantly intensify as it affects these coastal communities.
The advisory was prepared by Forecaster Reinhart at the National Hurricane Center.
