Strong winds rip roof off of Shelby High School

[Ptah]

Shelby Public School District will make a decision regarding Wednesday's attendance for students at the wind-damaged junior high / high school building later in the day on Tuesday, May 7, according to a press release sent out by Superintendent Elliott Crump.

After investigating the damage done by the strong winds on Tuesday, it was determined that a portion of the school's waterproofing system was detached, but that all structural aspects of the roof are currently believed to be intact.

A contractor is coming to Shelby on Wednesday. The professional plans to make the necessary repairs to the waterproofing system as soon as the rain subsides.

https://www.montanarightnow.com/great-falls/strong-winds-rip-roof-off-of-shelby-high-school/article_e958b888-0cac-11ef-b05f-6b9c716b5a36.html

[jmowreader]

1. This surprises and shocks me

Montana and Wyoming are infamous for their wind. My late father used to have a joke he liked to tell: "A Montana Wind Gauge is six feet of logging chain tied to the branch of a tree. If it's sticking straight out, the wind is blowing." (Logging chain weighs about six pounds per foot.) When my brother was still driving trucks, he got blown over in a loaded truck by the wind in Montana. When he called it in to the safety department - in most trucking companies having the truck tip over is cause for immediate firing - they were like "that happens. Get all your stuff out of the truck and we'll send someone to pick you up; we'll have another truck for you when you get here." They paid him for three days' home time to relax and he went right back out on the road. When the last decent governor Montana had was offered the chance to have wind farms erected in his state he announced that Montana's number-one natural resource is wind.

Given that they have serious wind in Montana and everyone builds with it in mind, how strong did the wind have to be to lift the EPDM membrane from a school roof?