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Jemma Croton

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Posts posted by Jemma Croton

  1. 42 minutes ago, Bring Back1962-63 said:

    http://www.meteociel.fr/observations-meteo/satellite.php?mode=animation-infrarouge-colorise

    anim_ir_color.gif      lastsnowradar_uk.gif

    A few of you are still misinterpreting these charts :)  The vast majority of our blizzard will not move up from France and Biscay - it will develop rapidly much closer to home in the Channel as the flow engages with our dense cold block and tries to under cut it but rises over it. So watch both the infra red satellite as well as the radar. In about an hour to two hours (1630 to 1730) there will some mind boggling developments.  David

     

    EDIT:  @divadee   Definitley and the red warning area should be expanded very soon :) 

    Where would you extend it?

  2. Bear in mind I word this for the weather ignorant 

     

    I know, I know, ANOTHER weather post.

    I really want to hone in a little bit away from the showers today and tomorrow and onto the front coming up from the south Thurs/Fri.

    It’s important I think to talk about this because there is a very rare and hazardous potential in the far SW with this front.

    The track of this low is still not completely clear but what we do know is that the low will come in land and, because it’s a low, it will bring heavy precipitation that will, at least initially, fall as snow. Potentially very heavy snow and blizzards. 

    This low is tricky right now and the reason is because it’s bringing milder air which will come up against that block and no model seems to have a footing as to how quickly that mild air might mix out the cold. Letting rain fall and the low to head further north... or will it hit the cold and stall giving even heavier accumulations. Quite literally every model is giving a different track and progression so it is tricky to forecast and it will continue to be more of a nowcasting event.

    What this brings, aside from the snow, gales and potential blizzards is something called freezing rain. It’s rare in the U.K. so no surprises if you wonder what the heck that is. It is a VERY hazardous weather where the precipitation falls as rain BUT immediately freezes on impact on any surface. Like literally immediately. 

    This alone is hazardous enough but this front is going to be a snow to rain event if rain does fall so what *could* happen if this occurs is we have heavy snow fall and, at the time of day this is looking to hit it will be snow that is disturbed by daytime movements. Crunched by footsteps and mushed by cars etc. If (IF) this does then give way to freezing rain we could have ice forming on top of that deep, disturbed snow and really that is a recipe for disaster.

    This is mostly likely to happen (if it does) in a sort of area if you draw a line from Bristol to Brighton, anything below that. That’s a lot of rural areas etc. Freezing rain can also damage power lines and trees etc because of the weight of the ice on these structures.

    I really hate to have to post out about a hazard when things are still so unclear but it’s unlikely we will get firm clarity until this event is upon us and, with the MetO now mentioning it their forecast it’s looking more like a real possibility than the “shit, this looks like it could give freezing rain... can you imagine” talk in weather communities the past few days.

    The track of the low can change but it will come up from the S/SW on Thurs/Fri and has a warning in place because of the hazards involved. Please stay close to MetO forecasts and remember to check regularly as they are constantly updated in events like this. I will post again as we get closer.

    • Thanks 1
  3. 22 minutes ago, Ruzzi said:

    This may aswell be named the Friday low thread. Great discussion ... back to the regionals then ?

    Charts like these on the doorstep... imagine the windchill from that. Plus anywhere that catches the showers, it's going to be blowing like crazy in the strength of that wind 

     

    IMG_8322.PNG

    IMG_8323.PNG

    It’s model output discussion. The one thing on the fairly near time modelling that still has no real consistency or defined track is the Friday low. Of course it’s going to be discussed. ??‍♀️

    • Like 6
  4. 8 minutes ago, nick sussex said:

    H Jemma it does make sense but be cautious when viewing those automated forecasts . 

    As for the attention seeking low to the sw we still need more runs because it’s a complicated set up.

    It’s always a difficult juggling act for the outputs to work out the forcing from the north and the north ne movement of the low from the south .

    50 to 100 miles either way can make quite a difference in terms of ground conditions.

     

    Always read them with a pinch of salt sweet. Just thought it might help some with the dismay xx

  5. I know this isn’t model specific but it is relevant to anyone dismaying about the events Thurs and Fri based on current output. 

    I checked MetO for Swindon at 9pm or so and there was intermittent snow showing late Thurs and a bit of Fri. That’s now changed again to constant snow late Thurs, all of Fri and into Sat AM. 

    To me this is a pretty clear indictation that, whatever the big 3 are spilling out, MOGREPS must be showing something else or a more favoured track of that low.

    Hope that makes sense

     

    • Like 3
  6. 8 minutes ago, chrisbell-nottheweatherman said:

    That's a worry for me as well - the number of homeless people in Norwich seems to have increased sunstantially over this past few years.  As a wheelchair user, I may find it awkward getting out of the house much if we do get substantial snowfalls, my parents, though older, should be able to get round tthe village OK.

    Wiltshire already have their SWEP in place to provide shelter and streetlink is a great site to use to alert authorities of anyone homeless so they can send someone to take them to a shelter 

    • Like 3
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