Just before 4 pm (MDT), a colleague with a west-facing window asked me if I was watching the storm moving in. I ran to the roof and captured photographs of an impressive one! Notice the hint of green in the clouds...
This darker-exposed fisheye image shows the green light in the thin part of the clouds at the upper right.
Fisheye image of the Montana State University campus with a green thunderstorm moving in.
Green light clearly apparent at the upper right.
After a few minutes the green turned almost aqua-blue ...
Crooked horizon, but I was shooting rapidly before the big winds hit.
Blue-green light again at upper center.
Looking southwest as the system overtook us at MSU.
Lighter exposure of the previous shot...a little green color is visible on the right side.
Close-up of aqua-green colored patch to the west of my location.
Here's the same patch with a little less zoom.
Better exposure of the previous shot.
Wider shot of the greenish patch.
That's some serious precipitation! (looking sw)
Looking west over Montana Hall.
Unbelievable green thunderstorm ...
And then it hit and I ran inside. Here's looking out the window at spots on the roof where golfball-sized hail was exploding on impact.
Looking straight up at the green clouds through a slightly opened door.
There's a good contrast showing green light below the dark patch.
It moved out quickly ... heading northeast.
Here's a hail stone (held by John Carlsten) that was split in half (we could see the radial lines indicating that this approximately one-inch stone was only half of its original size.
John pointing out the radial structure...
Close-up of the hail stone.
It looks so nice ...
On a walk across campus I found a few surviving large hail stones.
Here's a hailstone that is about 1.5 inch diameter (and was likely bigger when it hit).
A collection of the buggers...
Very cool radially segmented structure!
Hard to see, but it looks a lot like a bundt cake.
This lens body is ~2.5 inches diameter, so I measure this hail stone to be 1.7 inch diameter (after melting some).
Our laboratory building window got broken.
Someone's car window was shattered...
A sizable number of windows were broken on the west side of Cobleigh Hall (Engineering building).
How many holes can you count?
Roberts Hall also took a beating.
At home, there were severed tree parts all over the lawn.
The whole event ended with a rainbow...