Access background information on how and why wind trajectories are monitored. Reverse and forward trajectories are available in this report.
1. REVERSE TRAJECTORIES (RT)
Since May 1, 2022, the majority of reverse trajectories that have crossed the prairies have originated from the Pacific Northwest (Idaho, Oregon and Washington). The number of incoming trajectories during the first two weeks of June was much lower than this past week (June 14-20, 2022) (Fig. 1). The number of reverse trajectories, originating from Mexico, California, Texas, Oklahoma, Nebraska and Kansas have significantly increased since June 18th.
a. Pacific Northwest (Idaho, Oregon, Washington) – The majority of Pacific Northwest reverse trajectories have been reported to pass over southern and central Alberta and western Saskatchewan (Fig. 2). This past week (June 14-20, 2022) the ECCC model predicted that 124 reverse trajectories would cross the prairies. This is similar to the number of reverse trajectories expected in the previous week (n=134).
b. Mexico and southwest USA (Texas, California) – Prior to this past week, the most recent reverse trajectories that originated from Mexico, California or Texas crossed over the Canadian prairies on May 31st. This week a total of 44 reverse trajectories were predicted to cross the prairies. Most reverse trajectories have entered Manitoba during the 2022 growing season. This week trajectories crossed Medicine Hat, Kindersley, and Swift Current.
c. Oklahoma and Texas – Since April 1, reverse trajectories were reported for Manitoba and eastern Saskatchewan. This week, a number of these reverse trajectories passed over central Saskatchewan, including Saskatoon, Moose Jaw and Regina (Fig. 4). This week there were significantly more (n=44) reverse trajectories than last week (n=1) that originated from Texas and Oklahoma.
d. Nebraska and Kansas – Similar to last week, a number of reverse trajectories originating from Kansas and Nebraska have crossed central and western prairie locations (Fig. 5). This past week (June 14-20, 2022) the ECCC model predicted that 51 reverse trajectories passed over the prairies. This is a significant increase from the previous week (n=8).
2. FORWARD TRAJECTORIES (FT)
The following map presents the total number of dates (since April 1, 2022) with forward trajectories (originating from The following map presents the total number of dates (since April 1, 2022) with forward trajectories (originating from Mexico and USA) that were predicted to cross the Canadian prairies (Fig. 6). This week (June 14-20, 2022) there was an increase in the number (n=50) of forward trajectories predicted to cross the prairies (n=34 last week). Results indicate that the greatest number of forward trajectories entering the prairies have originated from the Pacific Northwest (Idaho, Oregon, Washington), Montana and Wyoming.
View historical PPMN wind trajectory reports by following this link which sorts the reports from most recent to oldest.