...
The "80 00" hex values are obviously an indication that it is not able to calculate
winds.
The leading digit of the hex value before the "55 aa" are the sonic diag bits 12 to 15, where a value of 0 indicates a good status. The value in hex will be the sum of the following hex values:
...
In the above data, the diagbits are either "f" indicating all diag bits are set, or 8 indicating an excessive difference in the speed of sound measurements.
This Looking at the wetness and precip plots, this likely is a moisture problemdue to moisture on the transducers.