Convection in the Gulf of Mexico

May 28th, 2009 |
MODIS 11.0 µm IR + GOES-12 10.7 µm IR images

MODIS 11.0 µm IR + GOES-12 10.7 µm IR images

AWIPS images of the 1-km resolution MODIS 11.0 µm  and the 4-km resolution GOES-12 10.7 µm “IR window” channels (above) showed a cluster of very cold cloud top temperatures (-88º C on MODIS, and -82º C on GOES, violet colors) associated with deep convection over the northwestern Gulf of Mexico on 28 May 2009. Also of interest is the appearance of  both transverse banding and an orthogonal gravity wave structure in the northwestern portion of the anvil edge (near the Mexico border).

A comparison of the MODIS 0.6 µm “visible channel”, 1.3 µm “cirrus detection channel”, 6.7 µm “water vapor channel”, and the 11.0 µm “IR window channel” (below) showed that the various satellite  channels differed in their  ability to detect the true western and northwestern extent of the cirrus anvil edge.

MODIS IR, visible, cirrus, and water vapor channel images

MODIS visible, cirrus detection, water vapor, and IR window channel images

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