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September 2020 C.E.T. and EWP forecast contests


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September CET averages and extremes

... all values since 1981 are shown, colour coded for warmest, middle and coolest thirds of the 39 years.

 

22.6 ... warmest day (2nd, 1906)

21.4 ... warmest day in second half (21st, 2006)

16.8 ... warmest September (2006)

16.6 ... second warmest (1729)

16.3 ... third warmest (tied 1865 and 1949)

16.0 ... fifth warmest (tied 1795, 2016)

15.7 ... seventh warmest (1760)

15.6 ... eighth warmest (tied with 1780) 1999

15.4 ... tenth warmest (1895)

15.2 ... 2005

15.1 ... 2011, 2014

14.9 ... 1998, 2004

14.7 ... 1989, 1991, 2000

14.6 ... 1985

14.5 ... 1981

14.4 ... 2002

14.3  ... average 2001-2019 and 2003, 2019

14.2 ... average 1991-2019, and 1982, 1997, 2009

14.1 ... average 1990-2019 (14.147)

14.0 ... average 1981-2010 and 1986-2015 and 1821-1850 (!!)

13.8 ... 2007, 2010

13.7 ... average 1971-2000, 1983, 1984, 1995, 2013, 2018

13.6 ... average 1961-1990, 1987, 1996

13.5 ... average 1701-1800, 1901-2000, 2008, 2017

13.4 ... 1992, 2001

13.35... average 1659-2019 (13.3493 so it rounds to 13.3)

13.2 ... 1988, 1990

13.1 ... average 1801-1900

13.0 ..  2012

12.7 ... 1994

12.6 ... average 1659-1700, 2015

12.4 ... 1993

11.3 ... coldest since 1952 and tied (with 1829) 14th coldest (1986)

11.2 ... tied twelfth coldest (1860, 1877)

11.1 ... tied tenth coldest (1840, 1912)

11.0 ... tied seventh coldest (1672, 1687, 1691)

10.7 ... coldest September since 1807 and sixth coldest (1952)

10.6 ... fifth coldest (1703)

10.5 ... coldest (four tied, 1674,1675,1694,1807)

 6.7 ... coldest days in first half (13th and 14th, 1807)

 4.9 ... coldest day (28th, 1824)

____________________________________________________________________

Enter by the end of Monday, 31 August without penalty, or with increasing late penalties to end of Thursday, 3rd September.

(add your EWP forecast if you wish, to the CET entry) ...

============================================================================

 

EWP data 1766 to 2019 (Hadley)

 

189.8 mm __ wettest September 1766-2019 (1918)*

139.9 mm __ wettest September 1981-2019 in 1981 

102.0 mm __ wettest 30-year avg (1772-1801)

 81.1 mm ___ average all data 1766-2019

 77.2 mm __ average 1981-2010

 75.9 mm __ average 1990-2019

 58.4 mm __ lowest 30-year avg (1888-1917)

 16.4 mm __ driest September 1981-2019 in 2014.

  _8.0 mm __driest September 1766-2019 in 1959**

_________________________________________________

* 1797 and 1799 were almost as wet in the Hadley series at 185.4 mm and 186.8 mm.

** second driest in Hadley series since 1766 was 9.5 mm in 1865.

__________________________________________________

Recent EWP __ 2019 .. 124.0 ____ 2018 .. 67.0 ___ 2017 .. 106.2 ___ 2016 .. 72.0 ___ 2015 .. 62.7 ___

____ ____ ____ 2014 .. 16.4 _____ 2013 .. 61.8 ___ 2012 .. 92.8 ____ 2011 .. 57.0 ___ 2010 .. 86.9 ___

Enter the EWP contest on same deadlines as CET 

... good luck !! ..

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19C  :oldsad:  Last sub 11C September in 1952.  Last sub 12C September in 1986.  Last sub 13C September in 2015.  Winter 2020/2021 is over before its even started.

200mm from monsoons and Atlantic garbage.

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1 hour ago, Roger J Smith said:

15.8 and 86.7 mm due to heavy rains late in the month.

I hope not!  Do not want a warm September but what will be will be!

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