Noel becomes a Hurricane
Tropical Storm Noel intensified late in the day on 01 November 2007 to become a minimal Category 1 hurricane just north of the Bahamas. AWIPS images of the GOES-12 10.7µm IR channel (above) show that the circular area of very cold cloud top temperatures (colder than -80º C, green enhancement) became more well-defined and moved closer to the surface circulation during the intensification process.