I recommend the following setup for Skywarn spotters near downtown Minneapolis using a an HT with an output of 5 watts.
162.550 NWS (enter into your WX channel and enable WX alert function)
146.520 Calling frequency (enter into your 'CALL' frequency memory)
146.700 Minneapolis Skywarn Net 127.3 CTCSS 127.3
145.430 Hennepin County RACES Edina 127.3 CTCSS 127.3
146.760 Twin Cities FM Repeater Club St. Louis Park 114.8