Light, fluffy snow on rooftops can act as a sponge for rain. The Massachusetts Emergency Management Agency offers these tips.
As rains in Tiverton and Little Compton's subside, Winter Storm Nemo could still wreak havoc in your neighborhood. While temperatures dropped overnight on Friday resulting in light, fluffy snow, fluffy snow piled high on roofs can act as a sponge, absorbing rain and adding additional stress to structures. Relatively flat roofs are particularly vulnerable. In other cases, roof ice dams have formed causing water build-up, leading to interior damage. These conditions can accelerate the snowmelt. To minimize the risk of over-stressing a building roof due to accumulated or drifting snow: Information from a release by the Massachusetts Emergency Management Agency (MEMA) was used in this report.