010915 Radar and Sounding Operations

The radar operated continuously without problems.  Not much in the way of
significant weather.  Scattered cells predominated over the last 24 hours, some
of which had echo tops > 12 km and 30 dBZ exceeding 6 km; however, the cells
were generally short-lived and did not organize into bigger features.

Full troposphere wind and thermodynamic data were collected from the 
04, 08, 12,
16, and 20Z sondes.  No data was recorded for the 00Z launch (even after a
repeated launch).  Two main features of the sonde data: a persistent inversion
and dry layer just above 700 mb and the appearance of SW winds near the surface
with relatively strong easterlies aloft.  The shear profile was manifested in
the radar data (anvils detraining toward the west relative to the 
low-level cell
motion).

We have discovered a problem with archiving the radar data to DLT tapes.
Apparently, the tapes were rewound after a parity error occurred in the SCSI
bus.  The radar software (IRIS) did not know about the error or the tapes being
rewound.  The result is that raw data was overwritten on the DLT's. 
Luckily, we
have backup copies on separate hard drives of 2 other computers.  The problem
was only discovered by inspecting the sys.log file after the tapes would not
mount properly - no record of the re-writing was detected in IRIS.  The DLT
archiving system needs to be reconsidered.