Date: 990113
Material provided by Brad Ballish, NCO
Data collected on this flight, which had to be
cut short due to engine problems, had a strong impact on the analysis.
The flight followed a predesigned track, selected based on objective
sensitivity guidance. It explored the back side of a surface low. When
comparing the first
guess field with the final
analysis, we can see that the impact of the
data moved the surface low more than five degrees to the east.
The
vertical
profile of a sounding indicated that the analysis, as expected, is
much more consistent with the targeted dropsonde data than the first guess
forecast.