NOAA-NESDIS
Regional And Mesoscale Meteorology Team
Daily Satellite Discussion
Wednesday July 23, 1997
GOES-8 1 km enhanced visible images (Channel 1)
displayed at .25 km resolution
This four panel image is of hurricane Danny early in the day on July 19th when the storm's eye was centered over Mobile Bay. These images were extracted from a sequence that included five and one minute interval imagery. The images are five minutes apart, and show dramatic changes that can occur in minutes. Notice that at 7:30 AM EDT, the strongest convective overshooting is over the southeast quadrant of Mobile Bay. Fifteen minutes later, a second convective overshooting maximum forms west of Mobile Bay and could be followed as it rotated cyclonically around the eye to the southern end of the Bay passing over Dauphin Island. The NOAA P-3 aircraft identified a mesoscale vortex embedded within the eye wall over Dauphin Island that appears to be coincident with this convective overshooting maximum. Such high quality observations were not possible prior to the new generation of GOES satellites. The full one-minute sequence, six hours of data, is in the process of being placed on the RAMM/CIRA virtual lab server.

Jim Purdom and Eric Hilgendorf

We welcome your comments and discussion at ramsdis@comet.ucar.edu

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