Howard Baughman of Catonsville says he has lived nearly 83 years and sees occasional references to "traces of rain and traces of snow." "I have never seen `traces' quantified, however. Would you please clear this up for me?" Sure. Forecasters generally record a "trace" of rain or snow when it is evident, but too slight to measure. According to the Northeast Regional Climate Center's weather glossary, a "trace" of snow is less than a half-inch in depth. A trace of rain amounts to less than .005 inch.