Updated 8:27 PM ET, Wed May 5, 2021 This image from NOAA's GOES-16 satellite animation shows some of the millions of lightning events that were detected on Tuesday, May 4, 2021. (CNN)It's not just you -- Tuesday's storms were absolutely electric. Nearly 4.5 million lightning events were detected, which is the busiest the skies have been since May 20, 2017, according to experts who follow the charge. What are we looking at here? 00 UTC 4 May 2021 - 00 UTC 5 May 2021 is the busiest #lightning day in North America since 2017! The NALDN detected 4,498,673 events yesterday, the most since 4,547,173 events were detected on May 20, 2017. pic.twitter.com/Z7zP69KIVa— Chris Vagasky (@COweatherman) May 5, 2021