Reverse trajectories (RT)
Wind trajectories have been monitored since April 1 this year. Wind patterns continue to be similar to previous weeks. The first graph (Fig. 1) indicates that winds from the Pacific Northwest (PNW) passed over Carman MB each day of the past week. Though the number of RTs increased over the past week, the overall pattern has not changed across the prairies.
|Figure 1. Number of Reverse Trajectories (RT) originating in the Pacific Northwest that have arrived at sites across the Canadian prairies from May 9-15, 2017.|
Figure 2 shows that the greatest number of RTs continue to be settling at sites across southern Alberta (e.g., areas highlighted red).
|Figure 2. Total number of reverse trajectories originating from the Pacific Northwest of the USA arriving at sites across the Canadian prairies (April 1-May 15, 2017).|
Weather forecasts (7 day):
Grande Prairie: https://weather.gc.ca/city/pages/ab-31_metric_e.html