The Storm Impact Scale assigns storms numbers 1 through 5 based on expected rainfall and associated impacts. Number 1 indicates a light storm with half an inch or less of rain, typically lasting a few hours. Number 2 indicates 0.5 to 1 inch of rain and possible scattered power outages. Number 3 indicates 1 to 2 inches with hazardous roads, minor flooding, and numerous power outages. Number 4 indicates 2 to 3 inches with moderate flooding, widespread mudslides, and widespread power outages. Number 5 indicates three inches or more with extreme flooding, impassable roads, and multi-day power outages. Live Doppler radar and AccuWeather tracking support monitoring, and viewers are encouraged to tag photos with #abc7now.
"LIVE RADAR: Track storms as they move through the Bay Area with Live Doppler 7 Take a look at the chart above -- we will give each storm a number with 1 being the lightest type of storm and 5 being the most severe. This way you'll know what to expect. Number 1 means a light storm with 1/2 an inch of rain or less and likely lasting a few hours or less. Number 2 is a moderate storm with 1/2 an inch to one inch of rain forecast and could include scattered power outages."
"Number 3 is a strong storm with one to two inches of rain and could include widespread hazardous roads, minor flooding, and numerous power outages. Number 4 is a major storm with two to three inches of rain, moderate flooding, widespread mudslides, and widespread power outages all likely. Number 5 is a severe storm. That means three inches or more of rain and could include extreme flooding, roads impassable, and power outages for several days."
Read at ABC7 San Francisco
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