Snow plus rain equals additional hazards

Deep snow levels, mixed with falling rain, can lead to heavy loads on rooftops and potential structural collapse or sliding snow. While most new structures are built to withstand heavier snow loads, buildings and structures with flat roofs, such as carports, are at greater risk of collapse. A Winter Weather Advisory is in effect for the western third of King County until 4 a.m. Tuesday, February 12. Expect up to three inches of wet snow to fall from Seattle north overnight. Get the latest forecast and maps from the National Weather Service at

Use caution when clearing snow

  • If a roof (whether flat or sloped) is in eminent danger of collapse, stay away from the structure and call 9-1-1 for emergency help.
  • Removing snow from your roof with a shovel can trigger unexpected snow slides causing crushing/suffocating injuries or death. Keep people and animals away from potential slide zones.
  • It is strongly recommend you not access your roof to clear snow. Climbing on a roof increases the load already stressed by the heavy snow load. The use of ladders when removing snow from your roof can pose additional hazards.
  • Consider hiring experts who have experience and specialized equipment for safely clearing snow or ice.
  • Clear any accumulation of snow around side wall vents that connect to household appliances, such as a clothes dryer.

The National Weather Service’s latest forecast indicates a transition in precipitation from snow to rain, or a rain-snow mix, overnight. Temperatures are expected be just above freezing, reaching the low 40’s by Thursday.  Southeast winds

Prevent flooding around your home

  • Monitor neighborhood storm drains and keep them free of ice, snow and debris.
  • Do not block storm drains with snow from your driveway.
  • If the storm drain is blocked, use a shovel to clear the top of the grate, and break up and remove any built-up ice.
  • NEVER remove a storm drain lid or attempt to clean a drain located in a busy street.

Report and track power outages online

Power outages are on the increase. As of 7 p.m. Monday approximately 4,000 King County area Puget Sound Energy customers and more than 22,000 Seattle City Light customers were without power.

Know what to do when the power goes out.