Yes, I agree with several commentators, weather can indeed affect your reception of ALL radio signals, including digital signals. That is, it can cause a reduction in the signal reaching your receiver.( and in the case of groundwave skip, it can sometimes cause an improvement of the signal reaching your receiver.) Furthermore, as the result of my 50 years studying radio propagation, I can tell you that, without a doubt, WIND, common during storms and other weather events, directly affects frequencies above 400 Mhz, causing the signals( particularly distant signals) to literally be "blown around". This can and will cause a reduction in the quality of the 800 Mhz signals reaching your receiver, and, in the case of digital signals, can cause distortion and drop outs of the signal. I do not believe that it is anything inherent with P25 systems, as the wind can affect all digital, as well as analog, signals.
