

NASA's Tropical Rainfall Measuring Mission satellite called TRMM passed near Humberto on September 10, 2013 at 0147 UTC (9:47 p.m. Sept. 9) and collected data used in this rainfall analysis. TRMM's Microwave Imager (TMI) and Precipitation Radar (PR) showed a large area of heavy rain south of Humberto's center of circulation. Rain was falling at a rate of 2 inches/50 mm per hour.
At 11 a.m. EDT on Sept. 10, Humberto's maximum sustained winds were near 65 mph/100 kph, just 9 mph shy of hurricane-force. Humberto is now predicted by the National Hurricane Center (NHC) to become a hurricane later today, Sept. 10.
The center of Tropical Storm Humberto was located near latitude 14.6 north and longitude 27.7 west, about 220 miles/355 km west of the southernmost Cape Verde Islands. Humberto is moving toward the west-northwest near 9 mph/15 kph and is expected to turn to the northwest later today then north. The estimated minimum central pressure is 998 millibars.
If Humberto becomes a hurricane, it would be the first of the Atlantic Ocean season.