Tonight there is a chance for large hail for all of SD and western IA, these hail stones can get up to the size of golfballs. Reminder if you get stuck in a hail storm don't go outside, golfball size hail can fall at a speed of 171mph. The terminal velocity of this size hail stone can cause severe concussions so just stay where you're at and don't go outside unless you have a helmet but even that expect some bruised shoulders!
Here is the outlook for hail today.
At least in western IA there isn't enough instability in the air to contain much of a tornado threat but if you're in Sturgis for bikeweek you might want to pay pretty good attention to the skies because the CAPE if off the charts in that region for this afternoon.
Overall we are in for a good night of lightning photo ops and some hail probabilities. I'm planning on staying local to RV tonight so I will mainly be focusing on lightning photos tonight and measuring wind velocities. Good luck to everyone out today.
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