2017年10月 Saint 云 天气 Summary

Saint 云 2017年10月 天气 Summary  

October ended being the rainiest month of 2017 in a swath in central Minnesota. St. 云 was in the center of a band of 5-10 inch rainfalls (see NWS October Minnesota rainfall chart) that split Minnesota from Pipestone to Cloquet. 在这个范围内， 圣. 云区域机场 积累了5.08英寸，2英寸.59 inches above the October average of 2.49英寸. 这是 10月7日是圣. 云记录.

的 heaviest rain came right at the start of the month 1.55英寸 on 10月2日 and 1.10月3日，36英寸， each of which set daily rainfall records. 的re were two other moderate rain events, 0.64英寸 on the 14th and 15th, and 0.21号57英寸.

的 heavy precipitation came in the generally warm weather pattern that dominated the first 3 weeks of the month. 的 early month rainfall was triggered as a very slow moving front produced a series of thunderstorms that regenerated over Minnesota over a period of a couple of days. This storm had access to moisture levels that would be typical for a summer thunderstorm outbreak, rather than a mid-fall weather system. 的 two other moderate rain periods came during cold fronts that were steady movers, so the rain wasn't as prolonged or as heavy as was seen earlier in the month.

For the growing season (April 1-10月3日1), 圣. 云区域机场 picked up 26.95英寸，3英寸.比平均水平高出74英寸. 这不是 as wet as the severely wet conditions from the Alexandria Lakes to west of Lake Mille Lacs or as unusually dry as in northwestern Minnesota. 这一年，圣. 云有28个.94英寸，3英寸.比平均值高41英寸.

Of that 5 plus inches of water, a total of 1.4英寸的降雪. 的 only day with measurable snowfall was 10月27日 as central Minnesota received a glancing blow from a snowstorm that dumped 8-12 inches in north central and northeastern Minnesota.

While October snowfall is unusual, it isn't as rare as we'd like to think in St. 云. 45 of the 124 Octobers on record have had measurable snowfall. 2017年10月 was the 25th October out of the 124 with at least an inch of snow, so the average is 1 out of 5 years. 的 last October with an inch was 2009 (2.5英寸). 的 圣最早的雪. 云计算的历史 is September 21, 1995 when 0.下降了2英寸. 的 earliest inch was on October 12, 1969. 3.那天下了6英寸. 的 earliest inch in recent years was on October 17, 2002 when 1.下降了8英寸. 这是一部分 second snowiest October on record 与6.4英寸. Note also that the infamous Halloween Blizzard of 1991 only ranks 9th in snowiest Octobers, 因为大部分的13.3 inches fell after midnight on Halloween night.

温度 had quite the ups and downs in October. Even though this October may be remembered more for the late October snow and cold, the average temperature was actually 47.2度，1.比平均水平高5度. 10月12日, 包括最后5个, 比平均水平更冷, there were 4 October days more than 10 degrees above average. St. 云 came close to setting some record warm temperatures with 4 days having a high of at least 70 degrees. 的 first frost didn't come until October 9, followed on 10月10日 by a hard freeze with a low of 25 degrees. 的 first frost was among the latest 10% for first frosts and the first hard freeze was among the latest 25 percent.

It appears that the late October trend is continuing in early November with the possibility of significant snowfall through the first week.

     2017年10月统计数据