Update from the National Weather Service:
The damage from this was straight line winds.
Note: I will be adding video later on to this article.
This evening (Wednesday May 17th 2017) fellow storm chaser Justin Perkins and myself (Rickie Traeger) went storm spotting. We ended up in the area of Latham and Rockton ave in the Roscoe, Illinois area. We watched the storm cell come from our Southwest. We were on the outskirts of the cell for a bit. The cell was moving fast and we could see it was about to hit us. So we jumped into our vehicle to ride out the very strong winds and torrential downpour.
We decided to chase the cell and headed North on Rockton ave. About a half mile down the road we came across alot of debris. It happened in the 8400 block of Rockton ave in the Roscoe area. (I think its the Roscoe area) We could see the roadway was impassable and could see debris from a structure littering the field. The debris was literally wrapped around the trees. Some boards were embedded in the ground. The structure that was blown apart, was a newly constructed building with brand new boards. (According to a neighbor)
The first thing we did was got out to check on the occupants of the nearby residence. They said they were OK and were thankfully in the basement when the storm hit. We contacted emergency personnel to let them know of the situation.
After knowing the residents were fine and emergency personnel were notified, I then decided to document everything. We had arrived on the scene just moments after it happened. So the damage was fresh and this way if emergency personnel or the NWS needs documentation we could provide it to them. We also wanted to get the word out, to have the citizens avoid the area.
There was alot of damage from that outbuilding. (Yes, I did say outhouse in the video, sorry) and the debris was littered all over the field and the insulation which made it look like there was “snow” on the ground. Brand new boards were snapped in half from the building. Some were embedded in the ground. Parts of the building were literally wrapped around the trees. You could hear the tree limbs still snapping from above. Trees and debris littered the roadway. A man who was traveling down the road, helped me remove a piece of debris from the roadway, to make it a little passable for emergency vehicles when they arrived.
During the time we were on scene, the residents were already assessing the damage it it appeared they were starting to pick up the debris. We are glad to hear the family that lived there was OK and were in the basement when the storm hit. That family is definitely in our thoughts and prayers, through this difficult time.
At the time of writing this, we can only confirm there was definitely structure damage to a new outbuilding, trees down, power lines down, and debris littering the field. No injuries. The cause of this, is not yet known. Don’t know if it is straight line winds or a microburst, or even the possibility of a tornado (Tornado watch was issued until 11 pm)
I am going to finish this up, because the next round of storms is about to hit us shortly. And many are losing power. (9:35 PM)