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Post by Morningrise on Apr 8, 2018 22:04:35 GMT -5
January 1950 was (I think) the coldest month on record in Saskatoon, with an average high of -27.3, average low of -37.2, a record high of -13.6, and a whopping 13 days with lows below -40! Those kinds of temperatures are below average even in many parts of Nunavut and the Northwest Territories and about equal to the average January temperatures for Alert, Nunavut, at 82 degrees north. Monthly data |
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Post by Crunch41 on Apr 8, 2018 22:57:04 GMT -5
Wow, that's intense. It definitely looks like weather data from somewhere in Nunavut.
It also got decent snowfall which is surprising when it's that cold.
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Post by sari on Apr 10, 2018 17:31:05 GMT -5
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Post by Crunch41 on Apr 13, 2018 22:34:48 GMT -5
Eureka, California January 1888. This month they reached their all-time record low of 20F/-6.7C. Then a high of 77F/25.0C which was the monthly record high until it reached 78F/25.6C in 1986. 77 was also the highest temperature in 1888--they had the lowest and highest temperatures of the year in the same month! They also had 12.95"/329mm precipitation, twice the normal average. It was a wild month in a boring climate.  Another one: their snowiest month was January 1907 with a total of 6.9"/18cm. But they didn't even get below freezing that month! i.imgur.com/rb9LsXC.png |
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Post by lab276 on Apr 13, 2018 22:57:18 GMT -5
August 1995, the warmest on record in Sydney (21.3C avg max) started like this: 1 17.9 2 19.1 3 15.7 4 18.2 5 17.4 6 14.7 7 17.2 8 15.2 9 15.2 10 14.7 11 18.3 12 18.3 13 18.8 14 19.2 15 18.8 Not a day over 20C and an average of 17.2C And finished like this: 16 23.6 17 26.6 18 25.4 19 24.7 20 24.7 21 27.1 22 22.7 23 28.7 24 19.7 25 24.2 26 31.3 27 26.1 28 18.1 29 20.8 30 28.2 31 29.8 Average of 25.1C There was also 0mm of rain, the only time over 150 years of data that no rain was recorded in a calendar month.  |
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Post by Deleted on Dec 6, 2018 16:14:54 GMT -5
chandalar lake, january 1999. found this place when i looked back in the old paper versions of "väder & vatten".  quite weird that this extreme cold-snap in alaska coincided perfectly with the extreme cold wave in scandinavia and finland.  as you can see, chandalar lake recorded the lowest temperature in the NH that month, which must be rare for a place in alaska. |
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Post by Crunch41 on Dec 9, 2018 0:11:08 GMT -5
International Falls December 2000. Cold and dry but not recordbreaking. But still 15 inches of snow fell. Average snow ratio of 77:1! I didn't know that was possible.  Monthly extremes +0.6C and -32.2C Average -13.5/-18.5/-23.5 Precipitation 5.1mm Snowfall 39.1cm |
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Post by Deleted on Feb 7, 2019 13:23:15 GMT -5
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Post by sari on Feb 8, 2019 15:23:26 GMT -5
March 1912 in Kansas City. Average snowfall for March in Kansas City is 2.1 inches, with a standard deviation of 2.9 inches. This means that March 1912's snowfall is 13.8 standard deviations above average. Please note...suspicion of Death Valley's 1913 temperature readings first appeared in the 1940s, because people were suspicious of a temperature reading being 4.5 standard deviations above average. I challenge anyone to find a more anomalously snowy month anywhere outside of a lake-effect snowbelt.  Also the third-coldest March on record, after 1960 and 1906, but that statistic seems almost insignificant in comparison. |
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Post by Donar on Feb 9, 2019 7:48:18 GMT -5
Zinnwald in the Ore Mountains, August 2002 when a Genoa Low hit Eastern Germany badly and caused one of worst floods in recent history.  Elbe River before and after:  |
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Post by Crunch41 on Feb 9, 2019 16:04:24 GMT -5
Average snowfall for March in Kansas City is 2.1 inches, with a standard deviation of 2.9 inches. This means that March 1912's snowfall is 13.8 standard deviations above average. I challenge anyone to find a more anomalously snowy month anywhere outside of a lake-effect snowbelt.
I started making up numbers to see what kind of snow would be enough. One 0.1" snow, followed by 149 years of 0 snow, is still only 12.2 standard deviations above normal. That should be more abnormal than March 1912 in Kansas City, because March 1912 in Kansas city was about 20 times the average and this hypothetical one is 150 times the average.
So I used KC's snow totals in NowData. Missing years don't count and trace counts as zero. For March 1888-2018 I see an average of 3.56" and standard deviation of 5.41", making it 6.96 standard deviations above normal. Where did you get 2.9 inches?
Somewhere that sees measurable snow once in 51 years would have the same deviation, and it doesn't matter if it is 0.1" or 100". Standard deviation doesn't work so well for skewed data like snowfall. I think there are some cities in the western US that have had 1 or 2 large snowstorms but very low averages that might beat KC.
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Post by sari on Feb 9, 2019 18:47:20 GMT -5
Average snowfall for March in Kansas City is 2.1 inches, with a standard deviation of 2.9 inches. This means that March 1912's snowfall is 13.8 standard deviations above average. I challenge anyone to find a more anomalously snowy month anywhere outside of a lake-effect snowbelt.
I started making up numbers to see what kind of snow would be enough. One 0.1" snow, followed by 149 years of 0 snow, is still only 12.2 standard deviations above normal. That should be more abnormal than March 1912 in Kansas City, because March 1912 in Kansas city was about 20 times the average and this hypothetical one is 150 times the average.
So I used KC's snow totals in NowData. Missing years don't count and trace counts as zero. For March 1888-2018 I see an average of 3.56" and standard deviation of 5.41", making it 6.96 standard deviations above normal. Where did you get 2.9 inches?
Somewhere that sees measurable snow once in 51 years would have the same deviation, and it doesn't matter if it is 0.1" or 100". Standard deviation doesn't work so well for skewed data like snowfall. I think there are some cities in the western US that have had 1 or 2 large snowstorms but very low averages that might beat KC. Allow me to rephrase. I challenge anyone to find a more anomalously snowy month, anywhere that has never recorded a winter without measurable snow, that is outside of a lake-effect snowbelt. For the data, I was using the period from 1973 onward, which is how long the station at the airport has been operational. 1973-2018 has an average of 2.2 inches, 1981-2010 has an average of 2.0, so I decided to use 2.1. Standard deviation is from this: wrcc.dri.edu/cgi-bin/cliMAIN.pl?mo4358 |
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Post by Crunch41 on Feb 9, 2019 20:28:52 GMT -5
That will be harder, but OK. I was going to look for places that had very wet winters but only saw snow every few years.
Using 1973-2018 data for a 1912 event is how the standard deviation got so big. 13.8 standard deviations is impossibly rare, only 1 in 10^43. But it happened and could happen again, it's not that rare. I don't know what the chance of another March 1912 is.
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Post by sari on Feb 9, 2019 22:01:03 GMT -5
That will be harder, but OK. I was going to look for places that had very wet winters but only saw snow every few years. Using 1973-2018 data for a 1912 event is how the standard deviation got so big. 13.8 standard deviations is impossibly rare, only 1 in 10^43. But it happened and could happen again, it's not that rare. I don't know what the chance of another March 1912 is. But it is that rare. March 1912 totaled 41.2 inches of snow. Kansas City's 4th-snowiest winter on record, 2009-2010, totaled 44.3 inches for the entire season. March 1912 is the snowiest month on record by an enormous margin - the second-snowiest, January 1962, only reached 30.5 inches, and only five months other than those two have ever surpassed 20 inches (with only one of those five exceeding 22 inches). I do not expect the extremeness of that month to be equaled in my lifetime, unless some exceptional circumstance like a volcanic winter arises. Of course, as soon as I say that it'll happen this March. |
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Post by ral31 on Feb 10, 2019 9:19:13 GMT -5
March 1907. A streak with 11 days of highs 90F or above.  Normal high for the month is 69.7F. I don't recall it reaching 90F in March in recent years. Early the following April in 1907 there was a destructive tornado that went through Alexandria.  |
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Post by Babu on Feb 15, 2019 6:41:44 GMT -5
Spring 2014, the year Lund saw some leaves on trees in March.  March 31st 2014:  If the current weather pattern continues through February, and March is warm, southern Sweden has another shot at leaves in March this year. Maybe we'll see March leaves in Norway too somewhere. It doesn't make sense that Lund would get leaves in March but nowhere in Norway considering Norway is capable of much warmer late winters and early springs. |
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Post by Babu on Feb 15, 2019 6:51:15 GMT -5
Indeed it seems at least Stavanger had some leaves March 2014 too. This is the 30th.  |
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Post by Crunch41 on Feb 16, 2019 22:45:00 GMT -5
International Falls May 1954, their snowiest May by far. The end of the month had some warm days but the month was much colder than normal. Temperature range -7 to +26C, average 12.3/7.2/2.0. 34.0cm snow, 92mm precip.
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Post by alex992 on Feb 18, 2019 18:44:02 GMT -5
 Not a whole month, but quite a brutal stretch of weather in Fairbanks during late December 1961, was nearly below -50 F (-45.6 C) for a week straight! |
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Post by Crunch41 on Feb 28, 2019 23:52:31 GMT -5
From the shoutbox, the coldest temperature in Maryland. -40F in Oakland during a quick cold snap, almost out of nowhere. It must be due to radiational cooling since the diurnal range was huge. It has seen a few other -30s and the average yearly low is a respectable -13F/-25C.  This place saw a 41"/104cm snow depth in January 1996, but the lowest temperature was only -14F/-26C |
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Normal high for the month is 69.7F. I don't recall it reaching 90F in March in recent years.
