It's no surprise to anyone who lives in Salt Lake that this has been an incredibly cool and wet spring. I just took a look at the climate data for May and it is impressive.
For Utah as a whole, May was the 8th coldest in the 117 year period examined by the National Climatic Data Center.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEglr_psQSmisi_LanXtr00spWpc7SMjYb4IWQoNHLhHq0qsQlum32ELJpcWZQnOqjsugSVBNQed26Jg7MVUzVUHw6n2MUlutugVgMbBachd13HTr8BKLPW9PXipDjQau2SlAvHX7OuPVc0/s320/maytemp.gif) |
Source: NOAA/NCDC |
And the 2nd wettest.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiFMiBTOxYiIMxiv5IpnJR5MMvY7GekJhqH18E2dXdAqJG95oKitUjjYXJGpXfGNbEo8UdmAoCFskfm0nQVh6uAEBuaSIxEOCX8140exYNUZKhuUOZsFdcZLPkqeWkeLAcWq6pDvAROUhU/s320/mayprecip.gif) |
Source: NOAA/NCDC |
As shown in the analysis below, May was characterized by anomalous 500-mb troughing over the entire northwest United States.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgTGJh_WnXi8DYqXR5cIm4H8l3g2hhXRSNfUTrrdrkwzH50BKPJkErpPFraL2JvI5g_aoYLLL8_D9n1PWlm-fCSwZIHFFWeDbI9Lj7df7DYhvgSHT9iNaxB0ApduScprfenxw88TUmvDfY/s320/500z_30a.fnl.07.gif) |
Source: NOAA/ESRL |
Persistent troughing over the northwest in May was reflective of a pattern that has dominated the entire spring (Mar–Apr–May), as shown in the 90-day 500-mb height anomaly analysis for the period from 4 Mar – 1 Jun. Note the scale change, which makes the anomalies seem a bit more ominous than those above.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjAtDRjecSBP0tgFMHqUEa63VkIIqLrxQjvriGXGqCYm5LKigpt-9qFou74PJi58vOInfb7WDmEFib1StB1IXh7i_PAyE-G-yoqfXIJUhXcWwyGRFwe2_6LfwcihqQ5PWQ78hapI_iLUbI/s320/500z_90a.fnl.08.gif) |
Source: NOAA/ESRL |
And the troughs just keep coming. The latest NAM puts a deep upper-level trough over Idaho by 1800 UTC (1200 MST) Sunday. With 700-mb temperatures falling to near 0C, there will be cool rain in the Salt Lake Valley and snow in the Wasatch above 9500 feet yet again.
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