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Ghosts, Ghouls, Pumpkins, Autumn Chill?: October 2015 DISCUSSION/OBS


UnionWeatherWx

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My guess is that we see a clash of the titans pattern setting up for October between

the -EPO ridge and the Aleutian Low. That -EPO building toward the pole has been 

the dominant October pattern since 2002. But this year we have a much stronger El Nino

than the previous October El Ninos of the 2000's. So the Aleutian Low may try to push

east closer to the West Coast of NOAM than has typically been the case. The

interplay between the two features will determine our sensible weather here.

Could be a volatile month...we'll see...

 

Classic October 2002-2013 500 mb El Nino response 

 

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My guess is that we see a clash of the titans pattern setting up for October between

the -EPO ridge and the Aleutian Low. That -EPO building toward the pole has been

the dominant October pattern since 2002. But this year we have a much stronger El Nino

than the previous October El Ninos of the 2000's. So the Aleutian Low may try to push

east closer to the West Coast of NOAM than has typically been the case. The

interplay between the two features will determine our sensible weather here.

Could be a volatile month...we'll see...

Classic October 2002-2013 500 mb El Nino response

attachicon.gif500.gif

Starting around day 12 thru 15 which gets us out to around the 8th , you can start to see the Europeans 500 mb look one would want to see if you believe in the oct/winter correlation.

Deep NEG south of the Aleutians with the ridge to the west of Hudson bay.

Will be curious to see if the shift continues to show up as we get closer.

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Starting around day 12 thru 15 which gets us out to around the 8th , you can start to see the Europeans 500 mb look one would want to see if you believe in the oct/winter correlation.

Deep NEG south of the Aleutians with the ridge to the west of Hudson bay.

Will be curious to see if the shift continues to show up as we get closer.

 

Yeah, it will be interesting to see where the Euro ensembles place the Aleutian Low once we see the forecasts

later in the week. The one thing that the ensembles agree on to start the month is a strong -EPO which has

been typical for El Ninos since 2002.

 

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Yeah, it will be interesting to see where the Euro ensembles place the Aleutian Low once we see the forecasts

later in the week. The once thing that the ensembles agree on to start the month is a strong -EPO which has

been typical for El Ninos since 2002.

 

attachicon.gif4panel.png

 

Yep and it has some company , 

gfs-ens_z500a5d_namer_3.png

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NYC October records for reference...

decade....Ave.......high..low......Ave.max/min...max...min......Rainfall
1870's.....55.5.......60.3....50.6...........................................3.55"
1880's.....53.9.......58.8....48.6......77.0...34.1......87...29......3.17"
1890's.....55.5.......59.5....52.5......77.4...37.3......87...34......3.59"
1900's.....57.2.......61.3....52.7......77.1...37.5......82...32......4.39"
1910's.....57.9.......59.4....53.0......80.1...37.1......87...32......4.41"
1920's.....56.8.......61.1....50.6......81.4...35.3......90...29......3.39"
1930's.....57.4.......61.3....54.5......81.2...36.3......91...28......3.22"
1940's.....58.7.......63.6....53.8......84.9...37.8......94...30......2.42"
1950's.....58.6.......61.7....55.5......83.6...38.0......88...33......3.68"
1960's.....58.2.......61.8....55.0......82.2...35.3......86...31......2.45"
1970's.....56.9.......62.7....52.9......78.1...35.7......88...29......3.88"
1980's.....57.0.......61.8....52.8......78.5...37.2......84...31......4.01"
1990's.....57.7.......61.9....54.5......79.1...38.8......86...34......3.85"
2000's.....57.0.......63.6....55.0......79.1...38.1......87...36......5.23"

2010's.....58.6.......60.2....57.1......80.0...38.6......86...33......4.01"

1870---
2009.......57.0..............................80.0...36.8......................3.66"
1980---
2009.......57.2..............................78.9...38.0......................4.36"

Warmest...
63.6 in 1947
63.6 in 2007
63.1 in 1949
62.7 in 1971
61.9 in 1990
Coolest...
48.6 in 1888
49.7 in 1889
50.6 in 1925
50.6 in 1876
50.9 in 1869
wettest"...
16.73 in 2005
13.31 in 1903
12.97 in 1913
09.00 in 1927
08.63 in 1983
driest...
0.14 in 1963
0.28 in 1924
0.43 in 1879
0.59 in 1892
0.66 in 2001
0.66 in 1909
Snowiest"...
2.9 in 2011
0.8 in 1925
0.5 in 1876
0.5 in 1952
Hottest max..
94 in 1941 10/5
91 in 1939 10/10
90 in 1927 10/2
90 in 1941 10/6
90 in 1938 10/17
89 in 1922 10/5
Coolest monthly max...
66 in 1888
70 in 1894
70 in 1895
70 in 1977
71 in 1981
Coldest min...
28 in 1936 10/27
29 in 1879 10/25
29 in 1976 10/27
29 in 1976 10/28
29 in 1925 10/31
29 in 1887 10/31
warmest monthly min...
45 in 1946
45 in 1971
44 in 2004
43 in 1994
43 in 1927
Octobers with a temp. 32 or lower...
1876...32
1879...29
1887...29
1889...32
1904...32
1917...32
1925...29
1928...32
1933...32
1936...28
1940...30
1965...32
1969...31
1972...32
1974...31
1975...31
1976...29
1988...31

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