The terms your weather forecaster uses have specific meanings. His forecast will be more meaningful to you if you know just what the terms mean.
Rohweder, Dwayne A. and Shaw, Robert H.
"What Does the Weatherman Mean?,"
Iowa Farm Science: Vol. 15
, Article 2.
Available at: http://lib.dr.iastate.edu/farmscience/vol15/iss10/2