Weather

July 2021 Saint Cloud Weather Summary


Extremely Dry Conditions Intensify in July

July 2021 St. Cloud Weather Summary

在春季和初夏的大部分时间里,干旱状况在7月份加剧. The St. Cloud Municipal Airport only picked up 0.83 inch of July rainfall, 2.77 inches below the new 1991-2020 average of 3.60 inches. That ranks as the 6th driest July in St. 云降雨记录,可以追溯到1893年. It was the driest July since 1975. 在暖季的大部分时间里,圣路易斯市的总降雨量不足已攀升至5英寸以上. Cloud. The May-July St. Cloud rainfall total is only 5.76 inches, 5.35 inches below average. This ranks as St. Cloud's 4th driest May-July 这是自1988年以来最干旱的春末夏初,也是圣. Cloud records.

圣保罗北部和西部的情况更加干燥. Cloud. 这些地区错过了为数不多的产生大量降雨的风暴, so in Todd County, parts of Wadena County, 在过去的90天里,长草原和延伸到明尼苏达州中北部(以及南部的一些地区)的降雨量不足超过6英寸 (see 90-day Minnesota rainfall deficit from NWS). 整个州在生长季节(4月1日至7月27日)的降雨量排在明尼苏达州大部分地区最低的20%(图中红色部分) 明尼苏达州每周生长期降水亏缺排名; see for the latest) with pockets of less than 5 percent (brown) including from Paynesville southwestward.

干旱问题:土壤湿度低,河水流量大....

雨水的缺乏导致从明尼苏达河向北的大多数河流的流量下降到最低的25%(橙色) USGS daily Minnesota streamflow map). 明尼苏达州中部的几条河流的流量处于最低的10%. The Sauk River in St. Cloud 显示了从最低水平的适度恢复,这是由于一场大规模的局部降雨,倾泻了1.5到2英寸在索克中心区域(见棕色区域) Minnesota July rainfall map from NWS). However, the Mississippi River in St. Cloud remains at 3.8 feet, one of the 5 lowest readings in St. Cloud records.

雨水的缺乏也造成了农业土壤的干燥. 农业地区超过80%的水分被评为短或非常短的水分 8月2日明尼苏达州作物状况和进展报告.

此次干旱主要是由落基山脉中部或南部的强高压造成的停滞天气模式造成的. 这使得风向由西北转向东南, 将加拿大草原省份的干燥空气推向明尼苏达州.

温暖的气温,但往往没有预报的那么热

虽然七月比平均温度高,但它可能没有你想象的那么热. While St. Cloud temperatures climbed as high as 95 on July 4 and 94 on July 5, 预计气温将远高于华氏90度,甚至高于华氏95度的几段时间,在圣保罗都没有出现. Cloud. The average July high temperature was 84.9 degrees, 3.3 degrees above the new 1991-2029 average, with 7 days with a high of 90 degrees or warmer. However, Minneapolis-St. 保罗国际机场有10天的气温超过90.

Overall, the St. Cloud July Temperature was 71.7 degrees, 1.7 degrees warmer than average. 6月7日和8日的最高气温分别为98度和97度. No record temperatures were broken in July.

Drought Expanded...

持续的干旱加剧了明尼苏达州大部分地区的短期缺水问题. 美国干旱监测显示,在过去4周(设定日期为7月27日和6月29日),明尼苏达州中北部和中部的棕色(严重干旱)区域急剧增加,红色(极端干旱)区域的出现 US Drought Monitor comparison page). 北达科他州中北部出现了自冬季降雪量低以来最糟糕的(深红色)状况.

...加拿大野火烟雾频繁造访

温暖和干燥的条件相结合导致了烟雾造成的持续的空气质量问题. 萨斯喀彻温省大火上空的空气, Manitoba, 和安大略省西部(红点表示火灾失控) Canadian wildfire and fire danger map (来自加拿大环境部)经常在高空风从西北方向吹来的时候进入明尼苏达州. 这种持续的雾霾是气温在80华氏度或90华氏度以下时,往往比预报的要低的原因之一. In addition, 落基山脉上空停滞不前的下沉空气经常使大气中层的烟雾到达地面. 这导致7月份有几段时间空气质量很差, 这是红河谷最顽固的问题. 然而,最长的一段时间是在月底. 在7月29日和30日这波激增的开始,空气质量恶化到了紫色(见图1) Minnesota current air quality index 来自明尼苏达州污染控制机构),甚至是棕色类别(超出标准), 明尼苏达州部分地区的空气质量指数在300到400之间), including Bemidji, Detroit Lakes, and St. Cloud. 这些数据与洛杉矶雾霾问题最严重时的情况一样糟糕,也处于几年前中国空气质量数据的低端, 2008年北京奥运会前,政府关闭了所有工业.

Minnesota Wildfires Increased

温暖和经常干燥的条件也有利于野火在明尼苏达州的蔓延和发展. A fair number of "red dots" (see 美国火灾天气和雪崩中心野火地图7月份在明尼苏达州北部森林形成的森林大火,这还不包括在奎蒂科省立公园发生的大火, 就在界水的安大略一侧(见 Canadian wildfire and fire danger map).

     July 2021 Statistics

Temperatures (°F)
July 2021
1991-2020 Normals
Average High Temperature (°F)
84.9
81.6
Average Low Temperature (°F)
58.5
58.9
Mean Temperature for July (°F)
72.0
70.3
Daily St. Cloud July Records 10 Hottest/Coldest Julys
July Temperature Extremes
Temperature(°F)
Date
Warmest High Temperature for July 2021 (°F)
95
July 4
Coldest High Temperature for July 2021 (°F)
71
July 7
Warmest Low Temperature for July 2021 (°F)
70
July 5, 21
Coldest Low Temperature for July 2021 (°F)
45
July 8
Record Temperatures in July 2021
Temperature (°F)
Date
Old Record
No daily temperature records set
Temperature Thresholds
Number of Days
Normal
July 2021 Days with High Temperatures >= 90°F
7
4.67
2021 Total Days with High Temperature of At Least 90°F
15
11.43
2021 Total Days with High Temperature of At Least 100°F
0 (Last: June 7, 2011)
0.51
July 2021 Days with Low Temperatures >= 70°F
2
1.72
July 2021 Days with Low Temperatures >= 75°F
0 (Last: July 4, 2012)
0.26
2021 Total Days with Low Temperatures >= 70°F
4
3.00
Precipitation (in)
This Year
1991-2020 Normals
July 2021 Rainfall (in)
0.83$
3.31
生长季节(4月1日至7月31日)降雨量(中)
8.89
13.62
2021 May 1 through July 31 Rainfall (in)
5.76#
11.01
2021 Year to Date (January 1 through July 31)
13.63
16.62
$6th driest July on record #4th driest May-Jul on record    
July Precipitation Extremes
Precipitation (in)
Date
Most Daily Precipitation in July 2021
0.38 inch
July 6
Record Precipitation in July 2021
Precipitation (in)
Date
Old Record
No daily precipitation records set
Precipitation Thresholds
Number of Days
Normal
July 2021 Days with Measurable (>= 0.01 inch) Precipitation
7
9.3
Jan-July 2021 Days with Measurable (>= 0.01 inch) Precipitation
60
50.1
July 2021 Days with >= 0.10 inch Precipitation
3
5.9
Jan-July 2021 Days with >= 0.10 inch Precipitation
31
26.8
July 2021 Days with >= 0.25 inch Precipitation
1
4.1
Jan-July 2021 Days with >= 0.25 inch Precipitation
21
19.9
July 2021 Days with >= 0.50 inch Precipitation
1
2.5
Jan-July 2021 Days with >= 0.50 inch Precipitation
8
10.3
July 2021 Days with >= 1.00 inch Precipitation
0
1.2
Jan-July 2021 Days with >= 1.00 inch Precipitation
1
3.1

 

Saint Cloud May-July Lowest Rainfall (1893-2021)
Rank Amount (in) Year
1
4.38
1910
2
4.91
1988
3
5.66
1929
4
5.76
2021
5
5.79
1936
6
5.85
2007
7
6.12
1931
8
6.20
1934
9
6.24
2006
10
6.53
1900

 

 

历史温度数据由圣克劳德国家气象局提供 NOAA/NWS
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