The state of the Pacific ocean influences climate and weather conditions in Alberta, including precipitation that falls on the Sylvan Lake watershed.
According to Bob Tisdale NINO3.4 Sea Surface Temperature (SST) anomalies (a commonly used El Niño-Southern Oscillation Index) are just below the 0.5 deg C threshold of El Niño conditions. For the week centered on June 13, 2012, NINO3.4 sea surface temperature anomalies are approximately +0.43 deg C.
The current Tisdale graphic is here: NINO3.4 SST Anomaly-WUWT-2012-06-18
For more detail see this presentation by Jon Fennell to a RDRWA forum on the effect of climate cycles on river flows in Alberta
This Fennell graphic summarizes a century of data: Effect of Climate Cycles on River Flows in Alberta
More technical details on Pacific Decadal Oscillations are available here.
For a general explanation of the interdecadal cycles click on this link.
Watch this animation of temperature changes in the equatorial Pacific: