Aircraft “distrails” over the southcentral US

January 29th, 2007

GOES-12 visible image

GOES-12 visible channel imagery (above; Java animation) revealed numerous aircraft dissipation trails (otherwise known as “distrails” or “hole punch clouds”) during the day over eastern Texas, northern Louisiana, southern Arkansas, and Mississippi on 29 January 2007. Corresponding GOES-12 10.7µm InfraRed (IR) imagery showed that cloud top temperatures over that region were generally between -20º and -35º C; as aircraft (likely air traffic to/from Dallas-Fort Worth airport KDFW) penetrated that supercooled cloud layer aloft, they caused the cloud droplets to glaciate and begin to fall out of the cloud (causing the “holes” and “streaks” that were evident on the visible imagery). A higher resolution view of these cloud features is available from the Terra MODIS (sourced from the NASA Rapidfire site) and Aqua MODIS overpasses. The 12 UTC rawinsonde data from Fort Worth, Texas (below) indicated that the likely elevation of the supercooled coud deck was probably around 25,000 feet or so. Photos of these cloud features can be seen on the MediaLine weather forum, Weather Underground WunderBlog, WKRG (Mobile AL), NASA Earth Observatory , and StormCenter Envirocast sites.
Fort Worth TX rawinsonde report

One Response to “Aircraft “distrails” over the southcentral US”

  1. Farrhad says:

    Very interesting……

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