I recommend the following setup for Skywarn spotters near downtown Minneapolis using a an HT with an output of 5 watts.
162.550 NWS (program this into your WX channel and enable WX alert function)
146.520 Calling frequency (program this into the 'CALL' frequency memory)
146.700 Minneapolis Skywarn Net 127.3 CTCSS 127.3
145.430 Hennepin County RACES Edina 127.3 CTCSS 127.3
The only alternate repeater you will probably be able to key up will be the 146.76 (114.8) Twin Cities FM Repeater Club machine in St. Louis Park.
1. If possible, use your external speaker mic when operating with an HT.
2. Backup repeaters will be announced by Duty NCS based on storm track and availability of repeaters.