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Lettucing Gutted

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Posts posted by Lettucing Gutted

  1. We've now had 7 consecutive double digit minima Posted Image I believe only the ghastly Autumn of 2006 has had such a long run this late on when there were 8 from 14th to 21st October - an outstandingly gloomy and horrific period of weather.

     

    Last Autumn by contrast had no double digit minima after mid-September and was like a breath of fresh air. A very nice, pleasant sunny season with none of the southerly/south easterly gloom which has been so common in October since 1999.

    Indeed 1999 really did resume with gusto the step change warming with October that was dramatic from 1941 through 1972.  Not only have the top 3 warmest ever Octobers occurred in the 2000's 2001 and 2011 have been the first Octobers to not have any air frosts.

  2. Why does anyone want a cold, grey and miserable September? Surely it's preferably for cold months to occur during wintertime?Posted Image Posted Image 

    A cold September doesn't necessarily equal grey and miserable weather.  September 2012 cold weather was mostly accompanied by sunshine and showers and the very cold September 1986 was very dry and very sunny throughout.

    • Like 1
  3. My favorite charts in all seasons range from Cool Maritime Polar Zonality from the Atlantic to very cold Continental Polar air from the North Pole/Arctic via Northwest-Northeasterlies and from Russia via straight Easterlies.

    Below are my favorite examples of cold Continental Polar Easterlies straight from Europe:-
    http://www.wetterzen...00119870112.gif*
    http://www.wetterzen...00119860210.gif*
    http://www.wetterzen...00119960313.gif
    http://www.wetterzen...00119890404.gif
    http://www.wetterzen...00119550528.gif*
    http://www.wetterzen...00120031023.gif
    http://www.wetterzen...00119651114.gif*
    http://www.wetterzen...00120101201.gif


    Below are my favorite examples of cold Continental Polar Northwest-Northeasterlies straight from the North Pole/Arctic:-
    http://www.wetterzen...00119580122.gif*
    http://www.wetterzen...00119690208.gif*
    http://www.wetterzen...00119700305.gif*
    http://www.wetterzen...00119080424.gif*
    http://www.wetterzen...00119350517.gif*
    http://www.wetterzen...00119970626.gif
    http://www.wetterzen...00119650704.gif*
    http://www.wetterzen...00119120828.gif*
    http://www.wetterzen...00119180929.gif*
    http://www.wetterzen...00119931016.gif
    http://www.wetterzen...00119731126.gif*
    http://www.wetterzen...00119811212.gif*


    Below are my favorite examples of Cool Maritime Polar Zonality from the Atlantic:-
    http://www.wetterzen...00119840115.gif*
    http://www.wetterzen...00119960225.gif
    http://www.wetterzen...00119950302.gif
    http://www.wetterzen...00119900414.gif
    http://www.wetterzen...00119860514.gif*
    http://www.wetterzen...00120080626.gif
    http://www.wetterzen...00120070703.gif

    http://www.wetterzentrale.de/pics/archive/ra/1934/Rrea00119340831.gif*  Interestingly this unusually cold summer westerly wind gave a mean daily CET of only 10.8C on the 31st August 1934 with a -1C minimum at Rickmansworth according to http://www.personal.dundee.ac.uk/~taharley/british_weather_in_august.htmPosted Image We very rarely get westerlies that cold even in October and May these days let alone in August!

    http://www.wetterzen...00119500908.gif*
    http://www.wetterzen...00119831016.gif*
    http://www.wetterzen...00119961108.gif
    http://www.wetterzen...00119141219.gif*

    *=I have have not experienced these examples.

     

    I would have added examples from spring 2013 but the charts for that season are not yet archived in Wetterzentrale.

    • Like 4
  4. A spring with three halves, now that would be an extreme season!

    That would be too extreme for me especially if it involves a very mild/very warm halve.

     

    Here's my ideal temperatures in max and min order:-

    January -3C/-10C

    February   -3C/-10C

    March 5C/-5C

    April   7C/-3C

    May 10C/0C

    June   13C/3C (think 20th June 2004)

    July 15C/5C (think 4th July 1965)

    August   15C/5C (think many days in August 1912)

    September 12C/2C

    October 9C/-1C

    November 5C/-5C

    December 0C/-8C

  5. An interesting couple of charts

    The 500mb height anomaly sits over the SST +ve anomaly off the states but also sits over a -ve SST off Iberia?

    That positive 500mb height anomaly must be baroclinically driven with warm air advection in the west and cold air advection in the east instead of equivalent barotropic.

     

    I actually hope they stay warm into early winter and then we get pool of -15 uppers with big SLP gradient move over warm SSTs, light the blue touch paper and stand well back!, those convective easterlies in Feb or March would have been all time greats if we would have had higher sea temps.

    The problem is that while the atmosphere will be very unstable the warm ssts will also increase marginality and pimp up warm sectors in any cold airmass.  IMO its better to have a cool sea and very cold sub -15C air moving over.

  6. Assuming August is 17C and we then equal all of the warmest months on record from 2006 (16.8C), 2001 (13.3C), 1994 (10.1) and 1974 (8.1C) respectively then the final Annual CET will be 10.38C at its possible warmest.  However if again August is 17C but we then equal all of the coldest months on record from 1674 (10.5C), 1740 (5.3C), 1782 (2.3C) and 1890 (-0.8C) respectively then the final Annual CET will be 7.8C at its possible coldest.

    • Like 1
  7. Regardless of how mild or cool the rest of the year has been I always wish for a cool fresh September with cool zonality sunshine and showers days like 2012 or southerly tracking lows like Septembers 1992, 1993 and 1994 when its unsettled.  When its settled I wish for a cool dry sunny and even frosty September like 1986 with its clean light northerly winds and cool high pressure systems.

    • Like 2
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