2019年10月 Saint 云 天气 Summary

Saint 云 2019年10月 天气 Summary  

的 rains continued through the first two-thirds of October 在圣. 云和明尼苏达州的大部分地区. Even though the month ended on the longest streak with no measurable rainfall (October 23-31) since 3月15日-4月1日, the October rainfall total was 3.84英寸，1.比平均水平高出35英寸. More importantly, the total rainfall for the year reached 38.73英寸, 13.比平均水平高出20英寸. 这使得 2019年前10个月 the second wettest on record. Only the first 10 months of 1897 were wetter.

Already the 2019 total ranks as the 3日最高 for the entire year, 和 the most since 1965. 总数只有0.比1965年晚59英寸和2英寸.落后1897年28英寸. 的 weather pattern has dried out considerably with much more northwest-to-southeast flow (see Mid-tropospheric water vapor loop from Colorado State satellite slider), but the average precipitation for November 和 December combined is 2.20 inches, so the all-time record is possible.

的 growing season (April through November) precipitation is up to 34.67英寸，只有0.落后于1905年57英寸.

Included in the 105 days with measurable precipitation so far this year are:

• 10 days with at least an inch并列第七
• 31 days with half an inch of rain，第三名
• 44 days with a quarter inch of precip排名第五

A swath of the heaviest monthly rains reached from Redwood Falls through Meeker County, St. 云, Foley, 和 Onamia 和 to Cloquet 和 Duluth. Much of this area received over 5 inches of rain in October. This has led to near record flooding for the fall along the Red, 明尼苏达州, 和 Mississippi Rivers below Lake Pepin. Having so much moisture this late in the season also makes the ground more vulnerable to spring flooding.

的 temperature during the precipitation took a major fall during the month as colder weather dominated. 这使得St。. 云记录其 5th earliest measurable snowfall 在圣. 0时的云记录.5 inch fell on the night of 10月11日 through 10月12日. 0.2英寸 that fell before midnight on the 11th was only preceded by:

• 1995年9月21日 (0.2英寸)
• 1942年9月26日.8英寸，最早的一英寸)
• 1970年10月9日 (0.4英寸)
• 2009年10月10日.9英寸)

即使下着雪，圣. 云 和 most of central 和 southern 明尼苏达州 missed the major blizzard that hit eastern North Dakota, 红河谷, 和 northwestern 明尼苏达州 (see NWS Gr和 Forks Summary of the October 10-12 Blizzard in Red River Valley). Between 1 和 3 feet of snow fell in the western Red River Valley. Fargo-Moorhead 和 Gr和 Forks had a mixture of rain, 冰, 和 snow that ended up as accumulating snowfall.

的 colder temperatures that dominated the month ended up producing an average temperature of 42.9度，2.比平均水平低8度. While 8 days had temperatures that were above average, there were 6 days with temperatures at least 10 degrees colder than average. 的 most persistent below average temperatures took place after the rain stopped, when that northwest-to-southeast flow began steering in drier air from Canada. This kept the really moist air from the Gulf of Mexico bottled up well to our south, allowing the colder temperatures.

的 colder readings produced St. 云的 初霜 of the year on 10月11日. 的 near freezing temperatures allowed the snow to briefly accumulate. 的 first hard freeze (temperature of 28 degrees or colder) took place on October 24. 的 初霜 was 16 days later than average while the first hard freeze was 20 days later than average. This was not late enough to make up for the late start to the planting season.

的 first half of November will be dominated by much colder than average temperatures, thanks to the persistent northwest-to-southeast winds. This will also tend to keep us dry. However, it likely won't allow us to break any temperature records. 几乎所有的 10月下旬 和 11月初 cold temperature records happened when there was a snow cover. In 11月初, many of the records were set after the 1991年万圣节暴风雪.

    2019年10月统计数据