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Post by Crunch41 on Dec 16, 2018 15:26:22 GMT -5
What's the largest temperature departure from normal? Could be for 1 day, 1 month, whatever you want.
For Madison the largest is February 9th, 1889. High of -15F and low of -28, the average that day is 27 and 9. The mean temperature for the day was 42.8 degrees below normal. (-26/-33C, average -3/-13, 23.8 degrees below normal)
Largest positive departure is probably March 17th, 2012. High of 80 and low of 60, the average is 41 and 23. 35.7 degrees above normal. (26/16C, average +5/-5, 19.8 degrees above normal)
Largest departure for a month is
March 2012 +16.1F (+8.9C)
February 1875 -19.9F (-11.1C)
Largest for a year is 2012 (4.9F/2.7C above the 1981-2010 mean)
My guess is the largest in the world is a positive departure in somewhere like Verkhoyansk.
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Post by alex992 on Dec 16, 2018 15:30:04 GMT -5
Rogers Pass, MT has a record low of -70 F (-57 C), and the average low in January is 14 F (-10 C) at the nearest station though likely colder at Rogers Pass itself (maybe around 7-10 F). Still, a record low nearly 80 F (44.4 C) below average! wrcc.dri.edu/cgi-bin/cliMAIN.pl?mt7159 |
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Post by Babu on Dec 16, 2018 16:44:54 GMT -5
Are we talking absolute values or standard deviations? Hitting 45'C in Umeå in summer would arguably be more impressive than -38'C in February.
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Post by alex992 on Dec 16, 2018 16:47:21 GMT -5
Are we talking absolute values or standard deviations? Hitting 45'C in Umeå in summer would arguably be more impressive than -38'C in February. Absolute values. And arguably? Umea is 500 billion times more likely to hit -38 C in February than 45 C in the middle of summer. Not even a comparison. |
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Post by Babu on Dec 16, 2018 17:12:42 GMT -5
Are we talking absolute values or standard deviations? Hitting 45'C in Umeå in summer would arguably be more impressive than -38'C in February. Absolute values. And arguably? Umea is 500 billion times more likely to hit -38 C in February than 45 C in the middle of summer. Not even a comparison. And so, absolute values are a bit pointless. Who cares if -38'C is 27'C below average. 45'C at 24'C above average is almost infinitely more interesting and more of a deviation, even though it isn't in absolute terms. |
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Post by Steelernation on Dec 16, 2018 17:14:42 GMT -5
For Rochester:
Negative:
1. February 9, 1934: -37.8
T-2. December 20, 1942: -35.1
T-2. February 17, 1979: -35.1
4. February 8, 1934: -33.6
5. March 21, 1885: -33.0
6. February 11, 1885: -32.1
7. March 5, 1872: -32.0
8. February 18, 1979: -31.8
9. January 17, 1982: -31.3
T-10. February 15, 1943: -31.2
T-10. February 29, 1884: -31.2
T-10. November 30, 1875: -31.2
•There have been 23 days with -30 f departures.
•11 were in February, 5 in March 4 in January, 2 in December and 1 in November.
•The most recent was in 1982.
•They happened in 1872, 1875, 1884, 1885, 1889, 1896, 1914, 1933, 1942, 1943, 1957, 1967, 1979 and 1982
•The most in a year was 4 in 1885 and 1979
Positive:
1. January 21, 1906: +38.8
2. January 22, 1906: +36.8
3. January 8, 2008: +36.0
4. February 20, 2018: +35.3
5. January 13, 2013: +34.0
6. January 30, 2013: +33.7
7. January 14, 1995: +33.5
8. March 15, 1990: +32.8
T-9. March 20, 1903: +32.4
T-9. March 29, 1905: +32.4
•There have been 24 days with +30 departures
•10 have come in January, 9 in March, 3 in December and 2 in February
•The most recent was in 2018
•They happened in 1903, 1905, 1906, 1936, 1937, 1965, 1982, 1988, 1990, 1995, 1997, 1998, 2008, 2012, 2013 and 2018
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Post by alex992 on Dec 16, 2018 17:21:54 GMT -5
Absolute values. And arguably? Umea is 500 billion times more likely to hit -38 C in February than 45 C in the middle of summer. Not even a comparison. And so, absolute values are a bit pointless. Who cares if -38'C is 27'C below average. 45'C at 24'C above average is almost infinitely more interesting and more of a deviation, even though it isn't in absolute terms. Negative deviations in general are bigger than positive deviations, due to the more unstable nature of winter. The only place that I've seen that it's the opposite is Australia. Either way, if you find it pointless, you could always ignore the thread. Or list both positive and negative anomalies like the OP did. I don't see what's confusing. |
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Post by Crunch41 on Dec 16, 2018 19:59:11 GMT -5
Babu Sure, you can list standard deviations, why not? I just don't know how to find that data for most places. Steelernation I'm suprised Rochester has a 30F deviation in November. Usually Spring is more variable. Great Falls, MT was 62.1F/34.5C below normal on February 15, 1936 (-21/-49F, -29.4/-45.0C) The month averaged 32.5F/18.1C below normal. 
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Post by Steelernation on Dec 16, 2018 20:24:20 GMT -5
Steelernation I'm suprised Rochester has a 30F deviation in November. Usually Spring is more variable. It was an extreme 1 time event, that day had a high of 7, the next coldest November high is 17. The mean that day was 8.5 f colder than the 2nd coldest November mean so it was a really remarkable cold snap. |
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Post by nei on Dec 16, 2018 23:10:45 GMT -5
Rogers Pass, MT has a record low of -70 F (-57 C), and the average low in January is 14 F (-10 C) at the nearest station though likely colder at Rogers Pass itself (maybe around 7-10 F). Still, a record low nearly 80 F (44.4 C) below average! wrcc.dri.edu/cgi-bin/cliMAIN.pl?mt7159I'd guess Rogers Pass [or a similar Rockies frost hollow] is the winner; all other places that record really cold extremes have much colder averages |
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Post by Ariete on Dec 17, 2018 0:31:21 GMT -5
Turku,
Day: 10 January 1987, high -29.7C low -34.8C (normal hi/lo 0C/-4C)
Month: January 1987, mean -16.8C (normal mean: -4.5C)
Year: 1985 and 1987, mean -3C (normal mean: 5.5C)
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