THE WEEK OF MAY 24, 2016: Wind trajectory data processing by AAFC-Saskatoon Staff began in April. Reverse Trajectories track arriving air masses back to their point of origin while Forward Trajectories predict favourable winds expected to arrive across the Canadian Prairies for the week of May 24, 2016:
Reverse trajectories (RT) - Mexico and southwest USA
Compared to 2015, the number of reverse trajectories crossing the prairies is greater in 2016. Since April 1, there have been 18 prairie locations that have had RT’s originating from southwest USA. This compares with 12 for the same time last year.
Reverse Trajectories originating from Mexico and southwest USA between April 1-May 24, 2016:
.....Compared to last year!