They really are forecasting a lot of rain... as much as four inches! 
Friday Night
Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
Chance of precipitation is 100%. New precipitation amounts between 2 and 3 inches possible.
Saturday Night
Chance of precipitation is 40%. New precipitation amounts between a half and three quarters of an inch possible.

Friday Night
Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
Chance of precipitation is 100%. New precipitation amounts between 2 and 3 inches possible.
Saturday Night
Chance of precipitation is 40%. New precipitation amounts between a half and three quarters of an inch possible.