57 F. average high on April 14.
73 F. high on April 14, 2012. Yes, a year ago it was nearly 40 degrees warmer. Surreal.
.37" rain fell yesterday.
3" snow left on the ground at KMSP.
- Global warming has increased the loss of summer sea ice in the Arctic, which has altered atmospheric conditions that influence winter weather in the U.S. and Europe.
- The changes lead to invasions of Arctic air into the middle latitudes, increasing the likelihood of severe winter outbreaks, which occurred in the eastern U.S. and northern Europe in 2010 and 2011 and in eastern Europe in January 2012.
- The deck may be stacked for harsh outbreaks during the 2012–2013 winter in North America and Europe.
Graphic above: This winter has seen a very negative phase of the AO, as low as -5, meaning unusually weak westerlies at far northern latitudes, allowing polar air to become entrenched over Canada and the northern USA. Last winter: a strongly positive phase; meaning strong west to east winds, keeping the coldest air of winter well north of Minnesota. What changed from year to year? Record melting of the Arctic in September, 2012. Graphic: Greene/Scientific American.
"How much precipitation has Twin Cities area gotten so far in April (and can you break out snow vs. non-snow forms) of this year? What is normal for April precipitation. And for God's sake, please make it stop. Thanks."
Kris - I share your sense of angst, along with pretty much every other Minnesotan out there. Maybe there are a handful of snowmobilers amused they can ride their sleds in mid-April, but I'm not one of them.
April Rainfall (MSP): 2.63" (normal rainfall is 1.11", to date. Last year only .70" rain fell as of April 14).
April Snowfall (MSP): 6.8" (normal is 1.5" - only a trace of snow fell in April, 2012).
* A light mix next Monday should give way to highs at or above 50F. next week. I pray.