The northern lights may be visible across the northern U.S. this weekend.
A G2 (moderate) geomagnetic storm watch is in effect March 23, 2019. The watch was issued because the Space Weather Prediction Center says a coronal mass ejection was associated with a C4 flare that erupted back on March 20.
Forecasters say the Kp value will reach a 6 Saturday afternoon and evening. The Kp value is an index that ranges from 0 to 9 with 0 meaning little geomagnetic activity and 9 meaning extreme geomagnetic activity.
See the graphic below. As you travel north, your odds of seeing the aurora borealis are more likely.
A Kp value of 7 is typically needed for Pittsburgh to see the northern lights under a clear sky.
Those in North Dakota and Minnesota have the best shot at seeing the lights under a clear sky as a Kp value of only 5 is needed to see the aurora there.
Your best bet if you really want to try to catch a glimpse is to take a drive north up to Erie.
The weather looks to cooperate as a clear sky is forecast Saturday evening and night. Make sure you stay away from city lights as light pollution will reduce your chance of seeing the northern lights.