A Cessna Citation Encore CE560 landing in snow showers at the St. Louis Cahokia Downtown airport KCPS. We’re landing after the heavier snow showers have moved off. The white flashes you can see on the windshield are individual snow flakes hitting the windshield at 135 mph. Flying in snow can create a couple of problems. If the runway is snow covered it increases our stopping distance and with a strong cross wind can create control problems on the runway. The other problem is an inflight issue of precipitation static. When flying through snow the aircraft can accumulate a static charge on the airframe faster than the static wicks can dissipate it. When this happens the radios pick up a loud static which can make them unusable till the static discharges.