According to spaceweather.com:
*WEEKEND STORMS ARE LIKELY: *NOAA forecasters estimate a 75% chance of
geomagnetic storms on June 4th and 5th when a solar wind stream hits
Earth's magnetic field. Deja vu? This stream has been here before, on May
8th (Mother's Day), when it sparked the strongest geomagnetic storm of
2016. During that G3-class
<http://spaceweather.com/glossary/g3.jpg?PHPSESSID=05e02kdg8buhi9nafii7b8do04>
event,
auroras were photographed in the USA as far south as Kansas and Arkansas.
This time, analysts expect the storm to peak at G2
<http://spaceweather.com/glossary/g2.jpg?PHPSESSID=05e02kdg8buhi9nafii7b8do04>--not
as strong as the Mother's Day Storm, but still worth watching.
