rainy day = cloudy water?

Has any one else noticed this? We had a good rain yesterday and I had a water change this morning, now I have cloudier water than normal. This isn't the first time this has happened, I think its pretty interesting.

I dont see that correlation at all. What I do see is seasonal changes in conductivity. Summer time conductivity is at least two to three times higher than that of the Winter time.

when you say conductivity are talking about electrical conductivity? I thought it might be because of an increased amount of minerals in the water from a heavy rain prior to a water change. I have had this happen in the middle of winter.

Liquid conductivity is measured in micro Siemens per cm (µS/cm). It can be correlated to ppm which is what TDS measures. Typically 1ppm = 1.56µS/cm. It is not just the minerals that affect the conductivity or ppm.