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The Dog Days of Summer: August 2015 Discussion


dmillz25

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El niño in August are usually cooler in our away, doesn't mean it's a lock but chances are good for a cooler than average August

The Euro ENS and GEFS are both showing major cooldowns to start August. The brunt of the cold air looks to hit the Great Lakes, as has been the trend this summer, but we should have slightly below normal temperatures.
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We can't automatically assume that because we've warmed on average since the last two strong ninos. I wouldn't be surprised if it ended up near normal or even a tick above.

Weren't Augusts of 1969, 1972, 1997, 2002, and 2009 examples of warm El Niño Augusts? I think that 1969 and 20009 were actually warmer than July.

 

The cold August Niño summers I remember were 1977, 1978, 1981 (more warm neutral), 1982, and 1986,  Which ones, on either score, am I missing?

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Weren't Augusts of 1969, 1972, 1997, 2002, and 2009 examples of warm El Niño Augusts? I think that 1969 and 20009 were actually warmer than July.

 

The cold August Niño summers I remember were 1977, 1978, 1981 (more warm neutral), 1982, and 1986,  Which ones, on either score, am I missing?

 

 

Not surprisingly, the warm El Nino Augusts such as 2002 and 2009 featured a +EPO overall, while the cooler Augusts such as 1982 and 1986 featured a negative EPO. The latter category is likely where 2015 will fall given the current projections for the EPO. This summer, July looks like it will be the warmest month relative to normal. My confidence is high on a cooler than normal August, and this should yield a summer JJA very close to normal temperature wise in our area.

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Not surprisingly, the warm El Nino Augusts such as 2002 and 2009 featured a +EPO overall, while the cooler Augusts such as 1982 and 1986 featured a negative EPO. The latter category is likely where 2015 will fall given the current projections for the EPO. This summer, July looks like it will be the warmest month relative to normal. My confidence is high on a cooler than normal August, and this should yield a summer JJA very close to normal temperature wise in our area.

What about 1969 and 1997 EPO-wise?

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August stats for NYC...

August..........................................................

decade ave temp max.. min ave max min
1870's.....73.7.......na.....na.....na.....na
1880's.....72.0.......96.....50.....90.6.....54.2
1890's.....74.2.......98.....52.....92.8.....56.9
1900's.....73.8.......96.....54.....91.8.....58.1
1910's.....73.5.....104.....51.....93.8.....56.8
1920's.....73.0.......99.....51.....92.8.....55.3
1930's.....75.5.....100.....52.....94.9.....58.5
1940's.....74.5.....103.....52.....95.6.....55.4
1950's.....75.0.....100.....54.....93.4.....57.9
1960's.....74.6.......94.....50.....91.8.....56.2
1970's.....76.0.......98.....50.....94.2.....57.1
1980's.....75.9.......99.....50.....93.7.....57.2
1990's.....75.5.......98.....57.....93.3.....59.4
2000's.....75.9.....103.....56.....94.2.....60.0
2010's.....75.7.......96.....59.....92.2.....60.2

1870/1880-
2009 ave 74.5.....104.....50.....93.3.....57.2
1980-
2009 ave 75.8.....103.....50.....93.7.....58.9

Warmest.............Coolest.............Wettest.............Driest...........
80.3 in 1980.....68.5 in 1927.....18.95" in 2011.....0.18" in 1995
79.7 in 2005.....69.1 in 1903.....12.36" in 1990.....0.24" in 1964
78.8 in 1988.....70.0 in 1887.....10.86" in 1955.....0.54" in 1916
78.7 in 2001.....70.2 in 1886.......9.83" in 1927.....0.59" in 1981
78.5 in 1995.....70.3 in 1874.......9.56" in 1873.....0.86" in 1881
78.2 in 1938.....70.4 in 1883.......9.37" in 1971.....0.95" in 1886
78.1 in 1955.....70.6 in 1889.......9.28" in 1911.....1.07" in 1910
78.0 in 1939.....70.6 in 1894.......9.08" in 1942.....1.14" in 1882
77.8 in 1944.....70.9 in 1946.......8.97" in 1875.....1.16" in 1980
77.7 in 2002.....71.1 in 1919.......8.85" in 1933.....1.17" in 1894
77.7 in 1983

Hottest max........Lowest min....
104 8/07/1918...50 8/27/1885
103 8/26/1948...50 8/28/1885
103 8/09/2001...50 8/29/1965
102 8/11/1944...50 8/29/1982
101 8/28/1948...50 8/29/1986
101 8/04/1944...50 8/30/1965
100 8/31/1953...50 8/31/1976
100 8/28/1948...51 8/23/1923
100 8/09/1949...51 8/27/1887
100 8/05/1944...51 8/30/1986
100 8/05/1955...51 8/31/1965
100 8/02/1955
100 8/01/1933

Highest min.........Coolest max...
84 8/14/1908...59 8/21/2007
83 8/02/2006...59 8/31/1911
82 8/13/1908...60 8/10/1962
82 8/09/1896...60 8/28/1940
82 8/09/2001...61 8/26/1940
82 8/07/1918
82 8/01/1917
81 8/15/1988
81 8/11/1891
81 8/11/1896
81 8/05/1908

Coolest monthly max...
83 in 1927
86 in 1910
87 in 1889
87 in 1894
88 in 1963
88 in 1950
88 in 1904
warmest monthly min...
65 in 2005
64 in 1877
64 in 1980
63 in 1901
63 in 2001
...

# of times 90 or higher...
15 in 1980
14 in 2002
13 in 1959
13 in 1995
12 in 2010
11 in 1939
11 in 1944
10 in 1896
10 in 1936
10 in 1955
10 in 1988
10 in 1991

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Looks like August will open warm through D5 before the trough pushes east.  

 

Chances for 90s now thru the 5th.  

 

Yeah, once that trough pushes east, the models keep it over the Northeast into the middle of August.

So these will probably be the last 90's for a while. We'll see if the WAR can push back closer to the

coast for the second half of the month and allow some 90 degree potential to return.

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Yeah, once that trough pushes east, the models keep it over the Northeast into the middle of August.

So these will probably be the last 90's for a while. We'll see if the WAR can push back closer to the

coast for the second half of the month and allow some 90 degree potential to return.

 

Similar progression as 2013/2014 of cool front end of august albeit this year could be less pornounced along the coast.  Lets see how deep we go into the red through the 10th.

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Overall, this looks like a near normal temperature regime for our area over the next couple weeks. I think most of the anomalous cool will remain NW, and likewise, most of the anomalous heat to our south. This summer thus far has been noted for transience, and that should persist - namely, stretches of low dew point airmasses periodicaly interspersed with high humidity / temperature surges to the 90s. This warm season should feel prolonged as well, IMO, due to a warm May and warm September.

 

2015080100_054@007_E1_north@america_I_NA

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Iso agree, the record or near record warm May has enhanced what is an otherwise slightly above normal (jun/jul so far) summer.

 

We should rack up +1.5 to 2.5 through Aug 5th, then near normal Aug 6 - 7.  Aug 8 - 11 looks like some negatives.  Obviously the prior days 1 - 7 will be influenced by storm/clouds chances as well.  850 surge next mon/tue/wed but could be muted with clouds/storms.  If not Tue could see some mid 90s or upper in the warmer spots.

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Iso agree, the record or near record warm May has enhanced what is an otherwise slightly above normal (jun/jul so far) summer.

 

We should rack up +1.5 to 2.5 through Aug 5th, then near normal Aug 6 - 7.  Aug 8 - 11 looks like some negatives.  Obviously the prior days 1 - 7 will be influenced by storm/clouds chances as well.  850 surge next mon/tue/wed but could be muted with clouds/storms.  If not Tue could see some mid 90s or upper in the warmer spots.

I'm on the above normal temperature train for August...the only three summers that were hot during an el nino were 1977, 2002, 1952...el nino 2002 was stronger than the other two...1969 had a hot August...

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It would be nice if that 12z Euro Mid-Atlantic rainfall jackpot nudges further north over time to

help ease the Long Island drought conditions. 

 

JFK running well below normal April through July with the driest May on record

 

4/15...1.61....-2.26

5/15...0.46....-3.48

6/15...4.99...+1.13

7/15...2.31....-1.77

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