Lettucing Gutted

Goodbye southerly tracking jet. 17C

Is that Edmonton Cheeky Monkey?

The last exceptionally cold September was 1986 and since then the only decently cool Septembers have been 1992, 1993, 1994 and 2012.

Incredible there are only 5 people expecting a sub 16C August with also only one particularly cold (sub 15C) August.

The sun itself is actually the strongest in the period centered around 21-22nd June aka the Summer Solstice. However late July and yes often early-mid August is the hottest time of the year because although the solar radiation slowly gets weaker both the Land and Oceans in the summer hemisphere respond slowly to the reduction in solar radiation with the land been hottest in late July and the Ocean in September. This is seasonal lag.

You'll love this one:- http://www.wetterzentrale.de/pics/archive/ra/1975/Rrea00119750602.gif http://www.wetterzentrale.de/pics/archive/ra/1975/Rrea00219750602.gif

For a rapid change in the other direction from exceptional warm months to exceptional cold months we have to go all the way back to 1985/1986 which had a 6.3C December followed by a -1.1C February and a 5.8C April. For the second such example we have to go back to 1978/1979 which had a 8.5C November followed by a -0.4C January.

In addition to pollution another key factor for the low sunshine hours in Chongqing is the Asian Monsoon System. The cool and damp Northeast winter monsoon acts like a giant fog machine drawing cool air from the north over the even colder East China Sea leading to widespread dense fogs and thick Stratus cloud which is maintained over the cold ground too. Also the hot and humid Southwest summer monsoon generates lots of thunderstorms which merge into big Mesoscale Convective Complexes with extensive stratiform canopies.

Ex-Arctic/Continental Polar northerly air giving sunshine and 11-20C by day and clear skies and 0-9C by night. However I would also love Maritime Polar westerly air giving sunshine and showers/thunderstorms with again 11-20C by day and 0-9C by night.

I would like Reykjavik, Iceland. Basically cold/cool all year round whilst very mild and hot weather are virtually non existent.

This is the second time in only 3 years that an exceptional cold month has been followed by an exceptionally warm in just to 2-4 months.

As in all the other seasons I like both cool nights and cool days. As long the air is cool and fresh I enjoy both dry and sunny days, or sunny and showery/thundery days. I also like both cool and breezy days and cool and calm days. I also like both cool drizzly weather and normal cool rain. As long as the rain is not too heavy I also like thunderstorms and hail. I dislike heat and humidity and monsoonal-like downpours.

As the nights get longer the heat grows stronger. 20C Interestingly though August post 2004 has been the only month not to record a CET in the "well above average category". Also post 2004 August has also become the month with the least extremes in monthly CET with both the coolest and warmest CETs finishing within 1C of average. We have also had our longest run of sub 17C Augusts since the 1960-1974 run.

Indeed. Post 2004 August has also been the only month of the year not to record a single monthly CET in the "well above average category".

I will be very surprised if there are any patches left by the end of this month.

I would like to think of a classic autumn as a changeable season similar in that respect to classic springs but with a reverse temperature trend of course. In each month there should be lengthy spells of cool stormy and/or cool showery weather alternating with lengthy calm periods giving cold nights and milder days with only short periods of unseasonably warm and wintry weather in each month.

For the first time since September 2010 even I could be too low. When was the last everyone in the competition was too low?

It looks like July (2006 and 2013) will join April (2011 and 2007), August (1995 and 1997), October (2001 and 2005/2006) and November (1994 and 2011) in achieving their top 2 warmest ever CETs all in a return period of only 2 to 17 years.

At this rate July will be giving the November 2011 warm anomaly a run for its money. Also that means 2013 will finally leave 2010 as the only year without an exceptional warm month since 1996.

It will be a very hard pattern to sustain in the non-winter months but to get a really cold October (sub 7C) we would be looking for the same sort of Synoptics that give us Freezing winter months. Such months have a very strong and flat southern arm of the Polar Jet combined with a highly amplified ridge-trough pattern in the northern arm of the Polar Jet. Also the Greenland High often alternately ridges into Scandinavia and retrogresses so that we get Arctic/Continental Polar airmasses coming from both Easterly and Northerly quarters keeping the milder Atlantic and Continental Tropical airmasses at bay.

Yeah! Come on October 2013 put October 1740 to shame.

An Active "Arctic" Cold Front similar to that in Mr Data's videos from 8-9th July 1993 would get us off to a great and early start to autumn. Unfortunately unlike 1993 the Arctic is now too warm for such summer cold blasts.

20C

My top 3 dream weather dates would be:- 1) A walk in the Park on a crisp cool clear Autumn afternoon. 2) A restaurant with a blizzard raging outside. 3) A picnic on a sunny but cool summer day.

Remarkably as long as the cool values return soon every month this year so far has recorded a lower frequency of warmer than average nights than December 2012 and even the anomaly of the warmest nights compared to average so far this year is lower than the warmest nights back in December 2012 compared to its average.