A Saskatchewan farmer could only watch as fierce winds whipped through his field, blowing away a portion of his crop of canola.

"About half of my crop is blowing around really bad," Ed Fielder told CBC News Tuesday. "I mean there's no way of knowing how much damage there is. As soon as it blows out of the swath and spreads out, it shells-out. Once it shells-out, its gone."

According to weather reports, wind gusts in some parts of the province reached 100 km/hour Tuesday.

Fielder's farm is about 180 kilometres east of Saskatoon, near Spalding, Sask.

He said the wind was worst he has seen in 30 years of farming.

He had just spent the last few days preparing for harvest by swathing his canola crop.

However, as the swaths dry, they became susceptible to wind.

"Any canola crops that have been swathed for any length of time, they're starting to get dried out and there's not much weight to them anymore," Fielder explained. "They just blow all over in wind like this. There's millions of dollars worth of damage going on."

Fielder said as soon as the wind dies down, he -- and his neighbours -- will be able to get a better idea of just how much they've lost.