Tropical Storm Arthur, the primary named storm of the 2026 Atlantic hurricane season, introduced excessive winds and heavy rain to the U.S. Gulf Coast in mid-June.
NASA’s Terra satellite tv for pc captured this natural-color picture (left) at 10:30 a.m. Central Time (15:30 Common Time) on June 17. The second picture (proper) depicts infrared alerts often called brightness temperature, which assist distinguish cooler cloud tops (white and purple) from the hotter floor beneath (yellow and orange). Across the time these pictures had been acquired, the system had only in the near past been designated a tropical storm, based on the Nationwide Hurricane Heart (NHC).
Although Arthur stayed beneath hurricane power, it nonetheless delivered robust winds to components of the Gulf Coast because it tracked northeast. The storm had most sustained winds of 40 miles (65 kilometers) per hour across the time these pictures had been captured. Tropical-storm-force winds prolonged 175 miles (280 kilometers) from the storm’s heart, the NHC reported. Measurements at Galveston, Texas, as an illustration, confirmed a gust of 48 miles per hour.
The storm additionally produced heavy rainfall that the Nationwide Climate Service warned might result in life-threatening flash flooding. Estimates from IMERG (the Built-in Multi-Satellite tv for pc Retrievals for GPM), a product of the GPM (World Precipitation Measurement) mission, confirmed excessive rainfall charges over Gulf waters and increasing inland on June 17.
As Arthur weakened and have become much less organized, it continued to convey plentiful moisture to central Gulf Coast states on June 18. The Nationwide Climate Service reported rainfall charges of three inches (7.6 centimeters) per hour in southeastern Louisiana. Forecasts indicated that storm-total rainfall quantities might exceed 12 inches (30 centimeters) in areas, with some areas seeing totals approaching 20 inches (51 centimeters).
NASA Earth Observatory pictures by Michala Garrison, utilizing MODIS knowledge from NASA EOSDIS LANCE and GIBS/Worldview. Story by Kathryn Hansen.
June 17, 2026: Pure coloration
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