2017年6月 Saint 云 天气 Summary

June Runs Hot and Dry, 的n Cool and Wet in Central Minnesota

2017年6月 Saint 云 天气 Summary

2017年6月 was marked by a major weather pattern change in the middle of the month, bringing an end to more than 2 weeks of warmth. According to statistics collected by the 国家气象局, the 圣保罗6月的平均气温. 云区域机场 是66.2°F, 0.比平均水平高6华氏度. However, if we break down the month, 6月1日-17 was the warm period. 平均气温为68度.7°F (83.6华氏度，53度.7°F low) with 15 days having a high of at least 80 and 我们唯一的90度高温 6月10日. However, after 6月1日7, the average temperature in St. 云量降至62.9°F (73.6华氏度，52度.2°F low) with 12 days not reaching 80 degrees and 2 days with highs in the 60's. 的re were also two mornings with lows of 42 degrees, including 这个记录打破了新低 6月26日.

的 overall statistics still showed a warm average high of 79.3°F, the second warmest average June high in the past 10 years. 然而，6月份的平均低点为53点.1°F, the second coldest June low of the past 10 years.

的 reason for the shift was the major change of the steering winds across North America. A general pattern that kept low pressure near the western coast of North America during the first two weeks of June switched to a major high pressure area across the western third of country. This flipped the West Coast and Rockies weather from cool to the major heat wave we've heard a lot about in the media during the second half of June. 但, 在明尼苏达, it allowed several low pressure systems to track from British Columbia or even the Prairie Provinces of Canada over the Great Lakes. This meant that our steering winds during the second period were often from the northwest, driving cool fronts and lingering pockets of cool air 在明尼苏达.

的 change of temperature brought much more precipitation into 圣. 云 area, but the amount of rain was completely different within a few miles of St. 云. That was because the rain was mostly triggered by pockets and outbreaks of thunderstorms. 整个六月， 圣. 云机场有3个.58英寸，只有0.低于正常值59英寸. 在六月的前17天，圣. 云 Airport missed several outbreaks of storms and picked up only 0.95英寸的降雨. 有一段时间，圣. 云 was more than 2 inches behind in June, but the cooler pattern produced more rain in St. 云. On the last three days of the month, there were 2.15 inches of rain, about 60 percent of the total June rainfall.

However, the early month rain shortfall was mainly due to St. 云 missing outbreaks of rain and severe storms. Note that 圣earns-Wright County border near South Haven and Kimball got at least 4 inches of rain in June (see 明尼苏达州6月总降雨量 来自国家气象局). 那是由于暴风雨的爆发 6月11日 产生了很大的, accumulating hail in central Minnesota through the Twin Cities and straight line damaging winds as high as 70 MPH in Dassel and 80 MPH in Litchfield. 的 hail ruined many fruit crops in the Twin Cities.

的re was also a lot more rain from Sauk Centre into northern Kandiyohi County ( 大于5英寸) with more than 4 inches in much of Benton County into Mora and Pine City.

Other notable severe weather outbreaks included the 直线风损 in southeastern Minnesota on 6月1日2 and the 6月13日 outbreak of damaging winds and tornadoes from the eastern Dakotas into the Red River Valley and west central Minnesota. 有两次龙卷风 在明尼苏达州西部.

的 overall crop conditions have varied quite a bit. 的 6月26日 Minnesota Crop Progress and Condition report from US Department of Agriculture showed only 8 percent or less of soils in Minnesota being short of moisture. 的 main problem has been the cool weather, which has led to slightly fewer than average corn growing degree days 到目前为止.

的re was one more lingering sign of our very mild cool season. 再也没有和一个 冰点或更低这是六月的惯例. 的 2016-2017 total number of days with a low of freezing was 150 days, the second fewest in St. 云记录. 的 record was set last cold season (2015-2016) with 143 days.

On the other hand, the one 92-degree high we've seen 到目前为止 this summer means that the temperature has not hit 95 degrees in St. 2013年8月26日起的云. 的 temperature has only been warmer than that once in the past 10 years, 6月7日是101度, 2011. 最近的几个夏天 略高于平均水平, but really hot summers like 1988 haven't happened. 的 closest was 2011, which was one of the 20 warmest summers.

这个月也标志着 25th Anniversary of the Chandler-Lake Wilson EF-5 tornado on 6月1日6, 1992 (summary from NWS Sioux Falls). 的 storm cut through a swath of Chandler, causing damage from winds estimated as high as 260 MPH. One person was killed, 40 were injured, and there was $75 million in damage.

     2017年6月统计数据