NOAA-NESDIS
Regional And Mesoscale Meteorology Team
Daily Satellite Discussion
Thursday August 6, 1998
Figure 1 Figure 2
GOES-8 channel 3, 4 August 1998 at 1945 GOES-8 Visible, 4 August 1998 at 1945

Often, very impressive features in the imagery of one channel will be obscured in the other channels. This is the case that is presented for this satellite interpretation discussion. Four GOES-8 images are shown here. Figure 1 is the 8-km resolution channel 3 (6.7 micrometer water vapor channel) image which reveals the upper-level low northeast of Florida. Figures 2, 3 and 4 are the 4-km resolution visible image, 4-km resolution channel 2 (3.9 micron) image, and 4-km channel 4 (10.7 micron IR) images, respectively. The upper-level low does not stand out in channels 1, 2 and 4. Although this particular upper-level low is not responsible for severe weather, lows that are far less distinct often have a tremendous impact on weather. Channel 3 is an excellent source of upper-level flow information and should be used along with the other channels.
Figure 3 Figure 4
GOES-8 channel 2, 4 August 1998 at 1945 GOES-8 channel 4, 4 August 1998 at 1945

Louie Grasso and Eric Hilgendorf

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

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