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本月每日统计
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致:大学传讯
FROM: Bob Weisman, Earth Sciences
电话:255-3247 (w)
日期:2001年2月5日
SUBJECT: 的 January Thaw and 的n Some
2001年1月1日. 云天气摘要
After an extremely cold December, the atmosphere continued to
defy prediction in Saint Cloud by producing an extremely warm January.
的 average January 2001 temperature at the Saint Cloud Airport was
15.9度，7.比正常高8度. 这个温和的一月实际上
warmer than any January since 1990 and ranks in the warmest 15% (23rd place)
记录在案的121个一月份的数据. Yes, that means it was warmer last month than
during any January during our 3 consecutive warm winters. 1998年1月
the warmest January of our 3 mild winters with an average temperature of
只有15.5度. 的re were almost as many days during January 2001 with
a high of at least freezing (10) as days with a low of zero or colder (12).
的 warm days included a high of 42 on the 4th, which set a new daily
记录误差4度.
的 warm weather also was quite dry until the end of the month.
只有5.4 inches of snow fell in Saint Cloud, about half of the normal
1月降雪. This total was the lowest 1月降雪 in Saint
1991年以来的云. Still, we have already exceeded last year's seasonal
snowfall of 28 inches and are well on our way to an above normal
每年降雪.
的 dry pattern dominated most of the month as the
main storm track stayed across the southern US while a secondary jet
stream kept the arctic air trapped in extreme northeastern Canada. 的
pattern did change at the end of the month, allowing a low pressure
利用海湾湿气的系统. While this storm of the 29th and 30th dropped
.52 inch of melted precipitation, only 2.8 inches of wet snow accumulated
in Saint Cloud since there was not enough cold air to keep the precipitation
所有的雪. This is in marked contrast to the 18 inches of snow picked up in
Sioux Falls and the foot seen in some communities of west central and southwest
明尼苏达州. 的 .48 inches of melted precipitation which was measured on the
30th did set a daily record for precipitation.
It does appear that a more northerly flow is developing for early
February, so our mild weather will not continue.
I don't know if this weather news is good, but some of the extremes
apparent in December have turned out not to be quite as extreme. 明显的
record low of -26 on Christmas Day turns out not to have been a record low.
Pete Boulay of the State Climatologists' Office has gone through the old
handwritten records recorded by the 国家气象局 when they had
在圣克劳德的办公室. He has identified 10 days with lows of -40 or colder
in the 1880's when observations were being taken near the site of the current
圣克劳德大坝. 的 record low for Saint Cloud on December 25 was not -25
as previously thought, but -42 set in 1884. He has also been able to show that
the all-time Saint Cloud record low is not -43 recorded on January 9, 1977.
的 temperature has dropped to -50 twice: on January 2, 1885 and January 21, 1888.
Still, the day holding Saint Cloud's record cold average temperature (and the last
day that the temperature hit -40 in Saint Cloud) was set within recent memory: on
February 2, 1996, the high was only -20 and the low was only -40. 零下30度的平均值
temperature for that day still stands as the coldest in Saint Cloud history. 的
only air in the Northern Hemisphere which could threaten that record remains
safely locked in interior Siberia, which is bad news for them, but good news
对我们来说.
SUMMARY FOR JANUARY 2001 JAN 2001 NORMAL
温度
Average high temperature ( F) 25.3 18.5
Average low temperature ( F) 6.5 -2.4
Average temperature ( F) 15.9 8.1
Warmest high for this month ( F) 42 on the 4th (broke record;
见下文)
Coldest high for this month ( F) 4 on the 19th
Mildest low for this month ( F) 30 on the 14th (broke record;
见下文)
Coldest low for this month ( F) -17 on the 20th
记录温度(F):
Daily record warm high: 42 on the 4th (old record: 38 in 1898,
1964, 1985, 1989)
Daily record mild low: 30 on the 14th (old record: 29 in 1906)
熔化降水(中)
January 0.78 0.74
24小时内最高纪录 .48日30日(破纪录;
见下文)
日案底: .30日48日(旧记录: .34 in 1926)
降雪(中)
January 5.4 10.1
24小时内最高纪录 2.30日4点
Season (2000-2001) 34.0 26.3
ST. 云降雪(中)
OCT NOV DEC JAN FEB MAR APR MAY TOTAL
1999-2000 0.0 1.1 4.5 10.8 8.4 T 3.3 0.0 28.1
2000-2001 0.0 10.6 16.2 5.4 34.0
正常的0.5 6.8 8.9 10.1 7.0 9.8 2.3 0.1 45.5
