22 September 1996 96266

HSRL starting at 1829 and 2253 UT.
VIL at 1950 UT.
NOAA 14 19:43 UT Cloud Heights and Emissivities.
NOAA 12 23:24 UT Cloud Heights and Emissivities.

(ul>Other GOES 8 analysis times.
  • 19:46 UTC
  • 20:46 UTC
  • 21:46 UTC
  • 22:46 UTC
  • 23:46 UTC
  • 00:46 UTC MPEG IR movie of 22 September 1996.
    MPEG Visible channel movie of 22 September 1996.

    NOAA 14 at 19:43.

    HSRL found very light Ci at 13.0-13.8 and 15 km. VIL found thin broken thin layers at 8, 13, and 15.1 km. These layers preceeded the invasion of large anvils from the west.

    NOAA 14 found 11.0-14.3 km heights around EVG. All were at high scan angles of 49-52 degrees.

    GOES 8 found 8.6 km in a pixel directly on EVG while the next diagonal pixel 18 km to the northwest found 9.6 km. Other 11.0 and 12.4 km pixels were found around EVG.

    Effective Emissivity ranged from 17-51% for NOAA 14 (O.D.=0.4-1.4). While GOES 8 ranged 21-45%, with 21% directly on EVG and 32% to the northwest. This corresponded to O.D.=0.5-1.2 with O.D.=0.8 to the northwest.

    NOAA 12 at 23:24

    Lidars appeared to be blocked from finding the cloud tops because of the invasions of thick anvils. Cloud bases were from 5-8 km and were broken and varied. The VIL from tops up to 13 km but true tops were in question.

    NOAA 12 pixels were all at high scan angles and far from EVG, 50-83 km. The three closest were 3.4, 3.4 and 11.0 km. There was considerable disagreement with GOES 8 at these locations, probably because GOES 8 sampled the HIRS locations 22 minutes later and clouds were moving in fast from the west. Bad day for a comparison.