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desperately seeking

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Posts posted by desperately seeking

  1. Hi All,

    Convection confuses me. In the next few days we're forecast to have an LP sat bang over us. In the summer (especially if it was a warm LP which I know this one's not) I'm pretty certain we would be more or less guaranteed slow moving heavy - possibly thundery - showers more or less anywhere in the country. At this time of year, because the sun is less strong, this seems to be less likely - I keep looking at the LP that will be over us and having to remind myself that convection is less likely to happen - but is that true?

    This is where my question lies; how does the difference between a cold LP (like the PV that will be over us soon) and a warm LP (for example a Spanish Plume in August) affect convection and do we know where convection is more likely to occur in a cold and warm LP? What other factors (leaving out the effect of the sun) can contribute to convective showers being generated?

    TIA

    DS

  2. All, what's the consensus about this weeked's supposed event? The various sites/forecasters seem to have no clue as to what is happening:

    Metcheck are forecasting heavy rain ;) for tomorrow and sleet on Sunday.

    The Beeb and Sky are ramping it up to be a major snow event every forecast.

    Meto have orange warnings for Sussex and Kent

    NW has the PPN type being snow all through to Monday but the PPN chance charts show a decrease to 60% on Sunday.

    This is a tad confusing ;)

    Anyone got any ideas?

    DS

  3. TBH we haven't really seen much out of this spell so far. Half an inch before Christmas and not much more than another inch out of this snowy period. Nowhere near the amounts we saw in Feb 2009 where we had a good foot in a day. Doesn't look like we're going to see a massive dumping in the immediate future either. We really need a true Thames streamer or a big frontal battleground to get decent amounts here - just not in the right geographical location...

    DS

  4. I personally would love the winds to change to a ENE and start a Thames streamer, but that might make me very unpopular with those in Kent! :wallbash:

    Not that it's going to happen, but it would be great to at least get a dusting to make it easier to get around here. There is sheet ice all over central London, and with absolutely no grit on the pavements in my borough Kensington and Chelsea, one of the richest councils in the UK!!!

    I second that motion - the wind is far to low for anything to reach the capital at the mo...

    DS

  5. *sigh* - Looks like this streamer is going to be too far west for SE London. We never get anything from a straight NE'erly; too long a land track when the wind isn't heavy enough - hopefully we'll get some flakes once the strong winds start to kick in tomorrow afternoon.

    I'm off to bed

    TTFN

    DS

    Of course I meant to say East :drinks:

  6. What do the experts in here think about this weekend's forecast snow event for the whole of the South? I've just seen Francis on Sky who seems to think it'll be bad but he did say "it might not happen" at the end of the broadcast. The Met suggest tentatively that it will happen. Metcheck (am I allowed to say that in here? :cold: ) are saying that it will be an all day sleet event - at least for my postcode.

    Anyone?

    DS

    PS England boys nearly threw it away again :cold:

  7. It depends on the wind direction. A straight NE'erly will give showers to south London, NW KentSussex and Surrey.

    A straight Easterly, ENE'erly or ESE'erly will affect the whole of London, south Essex, and the north coast of Kent (except in an ESE'erly)

    As a (nearly) lifelong SE Londoner I would suggest that the overland track from a straight NE'ley is too long for any showers to reach us - but we have done very well in the past few years from ENE and E winds.

    DS

  8. Hi tv, welcome to the mad house. I live in Bromley. We've only got 7cms, but with your elevation you always do better.

    Jan

    You got more than we did then Jan - only around 1 to 1.5 inches in my back garden :mad:

    Looking forward to Sun/Mon

    Pitch black here now but nothing in the sky (apart from starlings)...

    DS

    Still can't spell.

  9. Met Office just put new warnings out for Sunday and Monday

    http://www.metoffice.gov.uk/weather/uk/uk_forecast_warnings.html

    There's a developing area of low pressure crossing from the continent bringing instability. The hollow symbols on the front indicate a upper cold front.

    "Upper fronts represent the boundaries between air masses at levels above the surface. For instance, the passage of an upper warm front may bring warmer air at an altitude of 10,000 ft, without bringing a change of air mass at the surface. "

    Excellent - thanks for that. Now I know what to look for I will allow my hopes to elevate somewhat! :D

    DS

  10. CAn someone explain to me where Sunday's supposed snow is coming from? Is it just going to be many heavy showers or something more organised - both Sky, the Beeb and the met seem to be hinting at something but nothing looks "organised" on the charts (except the fax - what's the difference between a front in solid black and one that is just an outline?)

    DS

  11. I'm confused by the forecast for the weekend. I realise that there'll be a vicious easterly wind blowing in which will help push any showers inland but all the forecasters (Sky, Beeb etc) are telling us to keep an eye out for possible heavy snow on Sunday for a lot of England. This would be very welcome for those of us that like that kind of thing, but other than a showery airstream I can't see anything more organised - what am I missing or are they just talking about a lot of convection stuff going down?

    DS

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