Weather

July 2010 Saint Cloud Weather Summary



从数据上看,七月是普通的,但不是恶劣的天气

Saint Cloud Weather Summary for July 2010    

圣克劳德地区机场7月份的统计数据显示,这是一个普通的月份, 但整个明尼苏达州的恶劣天气数量远不寻常.

圣克劳德地区机场的平均气温为72度.2°F, 2.4°F warmer than normal. The rainfall at the St. Cloud Airport was 3.15 inches, 0.19 inch below normal.

6月中旬到7月底,恶劣天气占据了大部分时间

6月17日至7月17日期间,明尼苏达州遭遇了37次龙卷风. In a normal year, 25.8 tornadoes are recorded in Minnesota. 2001年6月龙卷风数量最多,达到38次. The worst outbreak, however, was still June 17, when 20 tornadoes touched down, including 4 rated EF-4, for the first time in Minnesota.

On July 17在美国,明尼苏达州出现了四次短暂的龙卷风. More importantly, 高尔夫球到棒球大小的冰雹袭击了明尼苏达州中部的大部分地区, especially in Cold Spring and Richmond, 在蒙蒂塞洛,风速高达每小时76英里,在索克中心,风速高达每小时62英里. 此外,希尔曼在30分钟内降雨量超过2英寸.

On July 27, 明尼苏达州中部遭受大风袭击,圣路易斯市退伍军人高尔夫球场的风速达到每小时71英里. Cloud and 67 MPH in Sauk Centre. 但最严重的破坏发生在威斯康星州西北部和中北部. 威斯康辛州已经确认了六次龙卷风, including the first seen in Iron County in 40 years. Three people were injured in the wilderness around the Turtle Flambeau Flowage.

Finally, during the storms on July 23, a record 8-inch hail stone fell in nearby Vivian, South Dakota, near Pierre. The record stone 它最长的长度是8英寸,重近2磅. 它几乎是7月17日寒泉最严重冰雹的两倍.

明尼苏达州持续雷暴的原因是在过去的六周里,该州大部分地区都被主风向带穿过, 根据双子城国家气象局的图表. During late June, the steering winds were southwesterly, 我们来到了炎热潮湿的北方中原地区, 但近到足以让我们利用这些空气并产生严重的雷暴. In mid-July, 高温已经进入明尼苏达州中部和南部, 将主要的恶劣天气推到明尼苏达州中部.

频繁的雷暴产生了大范围的降雨

然而,降雨量在明尼苏达州和加利福尼亚州之间差异很大 the central Minnesota area due to the spotty nature of thunderstorms. 红木瀑布的降雨量相对较少, Granite Falls, Willmar, and Litchfield through St. Augusta, Paynesville, St. Cloud and the St. Cloud Airport into Clear Lake and Foley. 整个地区的降雨量不到3.5英寸. Further to the north, 底特律湖公园急流地区的降雨量高于正常水平,最高降雨量超过7英寸. It was the second rainiest July in International Falls with 8.81 inches of rain. 爱荷华州北部大部分地区的降雨量也超过了10英寸, southwestern Wisconsin, 以及南达科塔州东部由于持续的风暴路径.

雷暴通常不是在缺乏水分的大面积地区传播降雨的有效方法. The heavy rainfall, at best, tends to fall in bands perhaps 25 miles wide, leaving areas on either side relatively dry.

This leaves a swath of Minnesota substantially short on rainfall for the current growing season. 最严重的短缺发生在明尼苏达州东北部,该地区被列为最严重的地区 under severe drought conditions for most of the season. However, the dry area 从箭头延伸到铁山脉, Aitkin, Brainerd, the north end of Lake Mille Lacs, 然后穿过莫里森和斯特恩斯县和佩恩斯维尔, then westward through Morris, Benson, Montevideo to Ortonville and Wheaton. In the Little Falls and St. 多云地区的降雨量比正常水平低1-2英寸. 云机场自三月十二日(十一月十一日)以来的雨量较正常水平低约四分之二英寸.58 inches fallen; 13.79 inches normal).

July Consistently Warm, But Not Hot

7月份的气温持续温暖,但没有达到创纪录的水平. There were only 4 days with a high of at least 90 degrees在美国,气温都没有超过5月24日的94度. On the average, St. Cloud has 4.67 July days with a high of at least 90. 2010年7月比过去3个月要暖和得多,特别是比2010年7月暖和得多 July 2009, which was the third coolest July in St. Cloud records. Still, 这比10个最热的七月里的任何一个都要低两度, the most recent one being in July 2006, 8th warmest July on record.

2010年7月最引人注目的部分是持续的温暖. Highs broke 80 degrees on 28 of the 31 days. 在此之前,只有6个7月(上一次是在2006年7月)出现超过80点的高点. 唯一一个7月每天最高气温突破80华氏度的是1916年.

频繁出现80多岁的高温意味着圣. 云经常发现自己沿着或在温暖的一边的风向. 来自加拿大北部的冷空气入侵并没有发生. However, 雷暴在该地区移动或经过附近留下的频繁云层使我们无法更频繁地爬升到90以上.

Duluth did manage to tie a record 7月每天的最高温度都超过了70华氏度. 这种情况只在1988年7月发生过一次. 这可以归因于天气模式使湖风限制在北岸更远的地方. It may also be related that the 苏必利尔湖的水温比正常温度高得多, thanks to the early spring snow melt and Duluth's warmest spring in history.

持续温暖的天气和频繁的降雨总体上对农作物有利. As of July 26, 85%的玉米作物处于或超过吐丝期,其他小谷物正在收获. 不幸的是,频繁的恶劣天气造成了冰雹对农作物的损害.

八月开始有点干燥,本周晚些时候会变冷

看来主风向模式将在8月的前几天给明尼苏达州中部带来降雨的机会, 但大部分降雨可能集中在南部地区. During the second half of the week, a rare intrusion of cooler, 加拿大中部的空气将带走湿气,并在一两天内将80多华氏度的高温击倒. 下一个最可能出现在明尼苏达州中部的恶劣天气不会早于本周末的后半段.

    July 2010 Statistics

Temperatures (°F)
July 2010
Normal
Average High Temperature (°F)
84.4
81.6
Average Low Temperature (°F)
59.9
57.9
Mean Temperature for July (°F)
72.2
69.8
10 Hottest/Coldest Julys
July Temperature Extremes
Temperature(°F)
Date
Warmest High Temperature for July 2010 (°F)
93
July 14,27
Coldest High Temperature for July 2010 (°F)
74
July 30
Warmest Low Temperature for July 2010 (°F)
73
July 1
Coldest Low Temperature for July 2010 (°F)
51
July 12
Record Temperatures in July 2010
Temperature(°F)
Date
Old Record
No records set
Temperature Thresholds
Number of Days
Normal
July 2010 Days with High Temperatures >= 90°F
4
4.67
2010 Total Days with High Temperature of At Least 90°F
6
11.43
July 2010 Days with Low Temperatures >= 70°F
1
1.72
2010 Total Days with Low Temperatures >= 70°F
3
3.00
Precipitation (in)
This Year
Normal
July 2010 Rainfall (in)
3.15
3.34
2010 March 13-July 31 Rainfall (in)*
11.58
13.79
2010 Total Precipitation (in)
14.26
15.80
July Precipitation Extremes
Precipitation (in)
Date
Most Daily Precipitation in July 2010
1.05
July 5
Record Precipitation in June 2010
Precipitation (in)
Date
Old Record
No Daily Precipitation Records Set
Precipitation Thresholds
Number of Days
Normal
July 2009 Days with Measurable (>= 0.01 inch) Precipitation
9
9.3
July 2009 Days with >= 0.10 inch Precipitation
5
5.9
July 2009 Days with >= 0.25 inch Precipitation
4
4.1
July 2009 Days with >= 0.50 inch Precipitation
3
2.5
July 2009 Days with >= 1.00 inch Precipitation
1
1.2

历史温度数据由圣克劳德国家气象局提供 NOAA/NWS
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