Figure 5.1: 48-h forecast of sea level pressure (mb) and 1000-500 mb thickness
(m) valid at 1200 UTC 7 September 2001 for the operational Eta-22 (top left) and the
parallel Eta-22 with assimilation of NOAA-16 radiances (top right). The operational
Eta analysis valid at this time is in the lower right.