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2009 Drought Situation Report
(Sept 1) |
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Cool Enough to Brag About
9th Coolest Summer in St. Cloud Records
2009年8月及2009年夏季圣云天气摘要
Issued: 2009年9月2日星期三上午7点
2009年5月持续的高温让人沮丧，天气数据证实了这一点. 最后一个夏天(6月1日至8月31日)，圣克劳德地区机场的平均气温为65度.1°F, 2.3°F colder than normal. This tied 1884 as the ninth coolest St. Cloud summer 从1881年气温开始. Still, 它不像2004年那么酷, 哪个夏天几乎比这个还要凉爽几度，排在最冷的夏天的第四位.
There were only two days with a high of at least 90°F (温暖季节平均12个), 八月份没有一个，夏季只有一个. 自1962年以来的47年里，只有1981年和1993年有两天或更少的温暖. One of those warm days was May 20, when the high was a record 92°F. 在接下来的103天里，只有26天的气温高于正常水平，只有 3 July days 高于正常温度的高于正常温度的. The cool weather produced 两次创纪录的低温高温 in June and 5 record cool temperatures in July. July was also the third coolest July in St. Cloud records.
凉爽的天气使大多数农业站的生长日数(总平均温度高于50度)在明尼苏达州中部和南部减少了10-20%，在明尼苏达州北部减少了25-40%, according to the 8月31日明尼苏达州降水和气温汇总 来自国家气候办公室. 这导致大豆和其他农作物的成熟速度都比正常情况慢, according to this week's Minnesota Ag News from the US Dept. of Agriculture. 这意味着我们需要比正常情况下更晚的霜冻来让作物完成成熟.
2009年8月实际上是夏季气温最接近正常的月份. 圣克劳德的平均气温是65度.9°F, 1.3°F colder than normal.
持续干旱的生长季节在8月份有所缓解. 八月份圣克劳德地区机场的降雨量为5.23 inches, 1.30 inches above normal. 大部分降雨发生在8月7日至8月21日之间，其中4.圣乔治大教堂的降雨量为75英寸. Cloud Airport. Before that day, St. Cloud had picked up 9.生长季节(4月1日至8月6日)的29英寸比生长季节的降雨量少了四分之一英寸. 所以，这两周的降雨量增加了50%. The St. 云机场最大的降雨发生在8月7日至8日.35 inches fell. The 2.14 inches on August 8 set a daily record for rainfall.
然而，大多数降雨发生在大的，有时是严重的雷暴的爆发中. 这意味着整个地区的降雨量变化很大. 8月7日至8日，斯特恩斯县东南部的积雪超过3英寸(3英寸).88 inches at SCSU, the 24小时降雨量排名第四 of the past 18 years), 从克拉拉市到双城西南部郊区的狭长地带的降雨量为3-6英寸. Chaska had 6.20 inches. There was also an EF-1 tornado along the 明尼通卡湖的西部和北部海岸. 另一场强降雨在圣. Croix Valley on August 19但也在明尼苏达州和威斯康星州产生了11个龙卷风，其中包括两个 小而短暂的龙卷风袭击了南明尼阿波利斯和村舍格罗夫.
这些暴雨并没有完全结束明尼苏达州和威斯康星州的干旱状况, as seen on the US Drought Monitor. However, 它确实缓解了从双子城地铁到威斯康星州西北部的极端干旱地区(见 美国干旱监测的12周循环). As of the end of the month, 明尼苏达州气候办公室的干旱总结显示，一些地区的降雨量不足5-8英寸, 最明显的是在明纽斯加湖地区和明尼苏达州中北部4-6英寸的地区, the Minnesota River valley, and parts of the St. Croix Valley. On the other hand, 东部斯特恩斯县的反复高降雨量(作为比较), SCSU got 8.8月份的降雨量为57英寸) about the only one in the state 在生长季节降雨量接近正常水平.
Despite the dry spots, 只有19%的州表土被列为短或非常短, according to the weekly Minnesota Ag Newsletter from the USDA.
Ironically, after all of this cool weather, 实际上，9月一开始，气温就会较长时间处于正常至高于正常水平. 然而，干燥的天气将至少持续到下周初.
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2009 Drought Situation Report
(Sept 1) |
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Temperatures (°F)
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August 2009
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Normal
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| August 2008 Average High Temperature (°F) |
76.9
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78.9
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| August 2008 Average Low Temperature (°F) |
54.8
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55.5
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| August 2008 Mean Temperature for August (°F) |
65.9
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67.2
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August Extremes
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Temperature(°F)
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Date
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| Warmest High Temperature for August 2009 (°F) |
89
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August 14
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| Coldest High Temperature for August 2009 (°F) |
68
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August 7, 19, 29
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| Warmest Low Temperature for August 2009 (°F) |
69
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August 15
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| Coldest Low Temperature for August 2009 (°F) |
40
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August 31
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Record Temperatures in August 2009
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Temperature(°F)
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Date
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Old Record
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No Temperature Records Set
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Temperature Thresholds
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Number of Days
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Normal
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| August 2009 Days with High Temperatures >= 100°F |
0
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0.06
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| 2009 Total Days with 至少100°F的高温 |
0
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0.51
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| August 2009 Days with High Temperatures >= 90°F |
0
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3.13
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| 2009 Total Days with 至少90°F的高温 |
2
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11.43
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| August 2009 Days with Low Temperatures >= 70°F |
0
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0.68
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| 2009 Total Days with Days with Low Temperatures >= 70°F |
0
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3.00
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| August 2009 Days with Low Temperatures >= 75°F |
0
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0.07
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| 2009 Total Days with Days with Low Temperatures >= 75°F |
0
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0.47
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Precipitation (in)
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August 2008
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Normal
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August 2009 Rainfall (in)
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5.32
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3.93
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August Extremes
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Precipitation (in)
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Date
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Most Daily Precipitation in August 2009
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2.14 (set record; see below)
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August 8
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2009年8月降水量创历史新高
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Precipitation (in)
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Date
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Old Record
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Daily Record Precipitation
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2.14
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August 8
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1.79 inches set in 1973
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Precipitation Thresholds
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Number of Days
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Normal
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| August 2009 Days with Measurable (>= 0.01 inch) Precipitation |
11
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9.0
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| August 2009 Days with >= 0.10 inch Precipitation |
9
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5.6
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| August 2009 Days with >= 0.25 inch Precipitation |
6
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3.9
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| August 2009 Days with >= 0.50 inch Precipitation |
2
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2.4
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| August 2009 Days with >= 1.00 inch Precipitation |
1
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1.0
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2009 Drought Situation Report
(Sept 1) |
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Temperatures (°F)
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Summer 2009
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Normal
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| Summer 2009 Average High Temperature (°F) |
76.6
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79.3
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| Summer 2009 Average Low Temperature (°F) |
53.6
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55.4
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| Summer 2009 夏季平均气温(°F) |
65.1
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67.4
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Temperature Thresholds
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Number of Days
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Normal
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| Summer 2009 Days with High Temperatures >= 90°F |
1
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10.00
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| Summer 2009 Days with Low Temperatures >= 70°F |
0
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2.81
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| Summer 2009 Days with Low Temperatures >= 75°F |
0
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0.45
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链接到十大最热/最冷的夏天 | |
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Precipitation (in)
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Summer 2007
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Normal
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Summer 2009 Rainfall (in)
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11.29
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11.78
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2009 Growing Season (四月一日至八月三十一日)雨量(中)
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14.29
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16.88
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2009 Dry Period Rainfall (四月一日至八月六日)雨量(中)
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9.29
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13.66
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| 2009 August 7-21 Rainfall (in) |
4.75
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1.95
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2009 Total Precipitation (in)
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20.29
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19.73
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Precipitation Thresholds
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Number of Days
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Normal
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| Summer 2009 Days with Measurable (>= 0.01 inch) Precipitation |
31
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29.1
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| Total 2009 Days with Measurable (>= 0.01 inch) Precipitation |
65
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68.2
(Annual Normal: 97.3) |
| Summer 2009 Days with >= 0.10 inch Precipitation |
19
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18.9
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| Total 2009 Days with >= 0.10 inch Precipitation |
37
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38.1
(Annual Normal: 52.9) |
| Summer 2009 Days with >= 0.25 inch Precipitation |
14
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13.1
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| Total 2009 Days with >= 0.25 inch Precipitation |
22
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24.0
(Annual Normal: 32.1) |
| Summer 2009 Days with >= 0.50 inch Precipitation |
8
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7.8
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| Total 2009 Days with >= 0.50 inch Precipitation |
13
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12.7
(Annual Normal: 16.8) |
| Summer 2009 Days with >= 1.00 inch Precipitation |
2
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3.1
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| Total 2009 Days with >= 1.00 inch Precipitation |
4
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4.1
(Annual Normal: 5.5) |
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2009 Drought Situation Report
(Sept 1) |
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