Record High Temperatures Cause Major Runoff In Pacific Northwest

The entire Pacific Northwest experienced record high temperatures throughout April, causing much of the remaining snowpack to melt and runoff. More than 80% of all Snowpack Telemetry sites with at least 15 years of data set all new melt rate records for April. During two separate high-pressure weather systems in April, sites experienced minimum daily temperatures exceeding 20 degrees above normal. Due to the rapid snowmelt, runoff was above normal and Washington State’s rivers and streams were able to contain it without flooding.