2004年8月圣云天气摘要

主题:2004年8月及夏季圣云天气摘要

圣克劳德自1886年以来最冷的八月

并列史上第四冷的夏天

     如果你不喜欢2004年7月，那你一定很讨厌2004年8月. 的 upper-air flow that brought cool air frequently into central Minnesota in July became stronger and more persistent in 8月. 出于这个原因, the average 8月 temperature at the Saint Cloud Municipal Airport was only 62.3°F, 4.比平常低9华氏度. 这一数据使2004年8月成为 圣克劳德有123年气温记录以来第二冷的8月. (这里有十个最冷/最热的八月.) 的 only 8月 that has ever been colder was in the early settlement days of 1886 when the average temperature was more than three degrees colder than this past month. 8月份的平均最高气温为73.8华氏度，平均最低50华氏度.8华氏度是9月3日和4日的正常温度.

     2004年8月，全州出现了两次主要的寒潮. 第一股冷空气出现在8月9日至15日, 它的特点是有大量残余水分的冷空气团. (点击这里查看2004年8月的日高点和低点.) 的 persistent cloud cover allowed Saint Cloud to tie or set three daily cold records, 包括8月10日57华氏度的高温, 8月21日, 1966年8月23日至24日, 1940年为第二冷的圣克劳德八月高温. 唯一比它更冷的高温是1958年8月25日创下的55华氏度. (请参阅八月每日气温记录.)在疫情爆发的最后三天，天空慢慢放晴了, 但晴朗的天空使最低温度接近40度的历史最低温度. 圣克劳德总共有5天的平均气温低于正常水平10度以上. While Saint Cloud fell two degrees short of its coldest 8月 high temperature, 8月10日，国际瀑布的最高温度只有华氏49度, setting a new 8月 record for the coldest high temperature and marking only the 6th time the high temperature failed to reach 50°F in their history. (参见NWS德卢斯摘要 在这张唱片上.)窘迫和塔的低温降到了20多度, 明尼苏达州有好几天每天都有创纪录的低温.

    第二次寒冷爆发发生在8月18日至21日，空气更干燥，但更冷. 出于这个原因, Saint Cloud high temperatures were able to climb to the upper 60's to low 70's, 但连续三个早上都进入了30多岁. (点击这里查看2004年8月的日高点和低点.)期间共录得四项每日低温纪录(请参阅八月每日气温记录.)，加上8月21日创下了8月最冷的33华氏度(约合28摄氏度). 8月的另一个最低气温为33华氏度的日子是1974年8月31日. While the official Saint Cloud thermometer escaped its first 8月 frost ever, many neighboring cities and townsto the north and east of Saint Cloud had sub-freezing temperatures, 包括布雷纳德, Pierz, 和驻军. 除了, many personal accounts from the rural areas to the north and east of Saint Cloud confirmed a 霜和 temperatures in the upper 20's. (见8月19-21日低温低点声明 (来自国家气候学办公室). 今天早上, Hibbing managed to set its coldest 8月 low temperature in history 与 a reading of 27°F. 前一天晚上, 霜和, 在一些地方，最低温度在20多度左右, hit the northern Red River Valley and other non-forested parts of northwest Minnesota. 在此期间, Embarrass again set three statewide daily record lows 与 the coldest being 20°F on 8月21日.

   不像最近几年的几个月, the cold statistics for 2004年8月 were representative of the entire month's weather. 最高温度从未超过华氏83度. 的 only high temperature that was more than 4°F above normal was Tuesday's (8月 31st) 82°F, 比正常高8华氏度.

     凉爽的 8月 helped drag the meteorological summer (June 1 - 8月 31) average temperature to 64.4°F, 3.比正常温度低0°F. 2004年的夏天和1945年的夏天一样 the fourth coldest summer in the 123 years of Saint Cloud temperature records. (这里有十个最冷/最热的夏天.) (Note that the SCSU monthly temperature statistics are more complete than those of the NWS, so 并列第四是正确的排名). In the past 90 summers, only the summer of 1992, the coolest summer on record, has been colder. While there have been only 4 highs of at least 90 degrees during this warm season, 其中一天是在四月, 到目前为止，7月和8月已经创下了12次低温记录. 现在有链接到 其他明尼苏达州寒冷季节的声明 including the coldest 8月 and 2004年夏天 on record at both Alexandria and International Falls, 8月第5冷，夏天第11冷, 最冷的第六或第七, 在这个摘要的底部. Note that these links will move from temporary pages to permanent pages during the first couple of days of September.

    One weather statistic that has been underpublicized during the cool summer is the relative lack of rainfall. 8月份，只有1人.圣克劳德地区机场降雨量达64英寸. 这个总数大于2.比正常水平低3英寸，是圣克劳德历史上第20个最干旱的八月. Moreover, the summer 2004 rainfall ended up being just about three inches below normal. 的 growing season rainfall (April 1 - 8月 31) was very close to normal (16.降雨量为82英寸，而正常降雨量为16英寸.88英寸). 就像去年一样，大部分降雨都是在相对较短的时间内发生的. 5月16日到6月16日，9.降雨量达72英寸，占暖季降雨量的58%. 没有 the rainfall from those 32 days, this warm season has been more than 5.比正常低7英寸. 事实上， 截至八月的每月雨量统计 看起来和去年的很像. 的 cause of this year's dryness has been the persistent northwest flow of weather from northern Canada. True moisture from the Gulf of Mexico has been pushed much further south than normal. So, 当锋面袭来, few of them have had access to enough moisture to produce widespread heavy rainfall. Given the sporadic nature of thunderstorms, areas have been frequently missed.

    的 dry 8月 has allowed the dry conditions in the north central part of the state to greatly expand over the past two months. 的 8月30日生长期降水图 from the 明尼苏达州气候办公室 shows that the worst conditions remained from the northern half of Morrison County to Leech Lake and eastward through Grand Rapids and the Iron Range, 与该地区全年缺雨相似. 然而, 这个干燥的地区, 降雨量不足正常的80%, 已经蔓延到贝米吉了吗, 巴格利, 和派克急流城. 除了, the area of slightly below normal rainfall has extended southwestward from Wheaton and Ortonville northwestward through Alexandria and Saint Cloud. 在过去的一个月里，所有这些地区的降雨量都很短. 然而, 由于天气凉爽，情况不像去年那么糟糕, 怎样限制蒸发造成的水分损失.

    What are the consequences of the cool, dry weather this summer, aside from the complaints I get? 第一个后果是潜在的作物损失. 凉爽的, rainy May and June delayed crop germination and the early frost has damaged much of the crops in northwestern Minnesota. Crop damage from the 8月19日-21 cold period is still being assessed in north central and central Minnesota.

     凉爽的环境显然对树叶有好处, 增加了树叶同时变亮的可能性. 不利的因素是干燥的条件，容易使叶子枯萎. 根据最近的天气, there will be spectacular foliage viewing potential except possibly in the dry areas of north central Minnesota. 然而，这并不包括北岸，那里有大量的雨水.

     最后, the dry conditions is of some immediate concern due to the hot and windy conditions expected later this week. 今天早上, these conditions are producing a red flag warning for a high forest fire danger in western North Dakota. 但我们不会那么热, the combination of winds and heat will increase fire danger into the high to very high category on the 明尼苏达州消防局野火预报 星期四和星期五.

    具有讽刺意味的是, weather conditions for the first few days of September are expected to approach levels we haven't seen for most of the summer. 根据我的最新预测, 周三的高温将接近正常水平, then well above normal at least 星期四和星期五 与 a chance of 90 degrees for the first time since July 21 on both days.

链接到其他寒冷的八月和夏季声明

• NWS明尼苏达州8月和夏季记录声明 (9/1/2004)
• NWS威斯康星州8月和夏季记录声明 (including Rochester; 9/1/2004)
• NWS南达科他州8月和夏季记录声明 (9/1/2004)
• 寒冷的八月 大福克斯 (冷) 法戈/学习 (第二冷)(9/1/2004)
• 寒冷的夏天 大福克斯 (冷) 法戈/学习 (第七冷)(9/1/2004)
• 明尼苏达州中部和南部寒冷的8月和夏季最新情况 来自NWS Chanhassen(每日更新)
• 8月19日至21日出现低温 来自明尼苏达州气候办公室
• 明尼苏达州气候办公室 八月九日至十一日声明(8/11/2004)
• 在国际瀑布的所有时间寒冷高温 来自NWS德卢斯(8/11/2004)

    二零零四年八月统计数字

夏季(六月一日至八月三十一日)二零零四年统计资料