This weekend: RAINFALL AMOUNTS FROM 1 1/2 TO 2 INCHES...WITH LOCALLY HIGHER AMOUNTS UP TO 2 1/2 INCHES IN AND NEAR THE HIGHER TERRAIN NORTH AND WEST OF NEW YORK CITY...IS LIKELY TO CAUSE SIGNIFICANT URBAN...LOW LYING AND POOR DRAINAGE FLOODING EARLY THIS WEEKEND. IN ADDITION TO URBAN AND POOR DRAINAGE FLOODING...FLASHY SMALL STREAM AND RIVER FLOODING IS POSSIBLE. CONDITIONS ARE ALSO FAVORABLE FOR ICE JAM FLOODING.