It has certainly been a cold spring in Utah, but how cold? Has Hell frozen over? Is this the end of global warming?
According to the National Climatic Data Center, Utah's average temperature in April was below average, but only the 35th coolest of the past 117 Aprils. If you want really cold, in relative terms, head further north to the Pacific Northwest where Washington observed its 2nd coldest April of the instrumented period.
At KSLC, the mean temperature for April was 45.4 F, 4.6F below the average for 1971-2000. Not exactly BBQ weather, but it did make for good skiing.
As can be seen in the above analysis, we were a country divided in April with much below average temperatures in the Pacific Northwest and above average temperatures across much of the southern and eastern United States. The former was strongly related to anomalous troughing over the Pacific Northwest that was connected with a deep anomalous trough over northern Canada and Greenland.
All of this shows that weather, like politics, is local. It has been a cold spring in Utah thanks to an anomalous large scale circulation, but the global-mean temperature remains well above the 20th century average.
April shows the power that persistent, high amplitude, large-scale circulation anomalies have on local weather. Mother Nature can still give us a cold winter or spring on a regional scale.