The National Hurricane Center in Miami released its sixth special wind speed probability update for Tropical Storm Arthur on Wednesday, June 17, 2026, at 12:30 p.m. Eastern Daylight Time.
At the time of the report, the center of Tropical Storm Arthur was located near latitude 28.8 North and longitude 95.5 West. The storm was producing maximum sustained winds of approximately 40 knots — equivalent to 45 miles per hour or 75 kilometers per hour.
The bulletin provided the probability that sustained winds of at least 39 mph, 58 mph, or 74 mph could affect specific coastal locations over the following five days. These probabilities are broken into individual time periods as well as cumulative totals from Wednesday through Monday.
According to the data, Galveston, Texas carried the highest cumulative probability of experiencing tropical-storm-force winds of at least 39 mph, at 16 percent. Cameron, Louisiana followed with a 7 percent cumulative probability. Matagorda, Texas also showed a 7 percent cumulative chance, while Port O’Connor had a 3 percent cumulative probability of reaching those wind thresholds.
No locations in the forecast showed meaningful probabilities for winds reaching 58 mph or higher based on the five-day outlook.
The update was issued by forecaster Reinhart at the National Hurricane Center.
