This is not unheard of- a number of other #SSW events were predicted >20 days in advance (see: https://t.co/xkr4bPLq1J).— Dr. Amy H Butler (@DrAHButler) December 17, 2018
This is not unheard of- a number of other #SSW events were predicted >20 days in advance (see: https://t.co/xkr4bPLq1J).