This image of Texas, obtained by astronauts aboard NASA's Gemini 4 spacecraft on June 5, 1965, shows a large dark swath attributed to rainfall. The dark areas correspond to regions that received more than 1 inch of rain in the days before the image was obtained. The large swath is about 16 kilometers (10 miles) across near the western (left) end. The image is from the Image Science and Analysis Lab at NASA's Johnson Space Center.
To see how dark areas in images can provide evidence of rainfall, whether on Earth or Saturn's moon Titan, see PIA12818.