How many alerts by flooding in the SF area for this week? 
[IN:GET_WEATHER How many alerts by [SL:WEATHER_ATTRIBUTE flooding ] in the [SL:LOCATION SF area ] [SL:DATE_TIME for this week ] ?  ]
[IN:GET_WEATHER How many alerts by [SL:WEATHER_ATTRIBUTE flooding ] in the [SL:LOCATION SF area ] [SL:DATE_TIME for this week ] ?  ]