Having lived and loved living in four areas of Ronkonkoma in the last few years. Especially by the lake, if anyone has pictures please upload them. I would love to see pictures of the water level at Lake Ronkonkoma after this rain The 13.57 inches was recorded at Long Island MacArthur Airport in Ronkonkoma and set a state record for precipitation in a 24-hour period, the weather service said. I have never witnessed that amount.