(CNN) A massive cold air outbreak over the central US in early February set hundreds of cold temperature records, stretching the power grid in Texas and leaving millions without power . Sound familiar? Be prepared for severe weather and tornadoes • Know where to find your daily local forecast • Set devices to receive storm and tornado warnings via Wireless Emergency Alerts • Bookmark and tune into NOAA Weather Radio and your local news stations The year was 2011, when a moderate La Niña weather pattern and an active jet stream generated the scenario that’s almost identical to what we’ve experienced so far in 2021 . The weather events that followed 2011’s extreme cold snap now have meteorologists concerned that the US could be in for above-normal tornado activity this spring . The past few months have seen the strongest La Niña signal since the winter of 2010-2011. So, the question is whether this spring continues to mirror that year, which ended up the costliest on record for tornadoes and the deadliest in nearly 100 years. Read More “Severe weather season is really a collection of several short weather events, and anticipating individual events at long lead times is usually…