Observations for comparison to
Deep Thunder (RAMS) results during AMS 2000
Results from RAMS on the previous page
showed predictions of weather for January 11 and 12, 2000 for the Southwestern
United States. For comparison purposes, consider satellite observations
from GOES-10 showing cloud measurements on for January 11..
A
more detailed view from the outer nest of the RAMS runs corresponding to
this period is shown below. Qualitatively, the correspondence
between the observations and the predictions is fair. Of course,
the simulated "clouds" are multiple isosurfaces of total cloud water density,
and not the same as cloud imagery.
Now consider radar observations for approximately the
same period of time. The animation sequence is pseudo-colored by
precipitation type and density.
Since
this presentation is not calibrated in terms of actual observable units,
it is difficult to compare to the simulation results. In an attempt
to do so, the following animation shows maximum predicted reflectivity
for the outer nest. One mm contours of accumulated hourly precipitation
are overlaid to enable some comparison to the radar results. But
there is not much correspondence between these visualizations of radar
observations and the forecast simulation.
lloydt@watson.ibm.com
January 11, 2001
