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Model output discussion - January cold spell ending, what next?
Eskimo replied to Paul's topic in Forecast Model Discussion
Pressure-wise, a chart that looks more like mid-Spring than mid-Winter - remarkable in its own right -
Model output discussion - January cold spell ending, what next?
Eskimo replied to Paul's topic in Forecast Model Discussion
Well the MetOffice are going for southerly tracking lows as we enter the second half of January and the GFS has been pretty bullish with this idea for the past few days. -
Model output discussion - January cold spell ending, what next?
Eskimo replied to Paul's topic in Forecast Model Discussion
I tell you what, there's a lot of this 'wafting' from the south going on in the atmosphere - lots of WAA happening which is exactly what you want to see. -
It's actually drizzling outside at approximately 180m asl.
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Yeah I think I would have preferred a -10C night last night than the dusting we have and will likely end up with today.
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Probably could have seen a -10C night tonight if it was clear, got down to -4.2C but has risen to -3.7C. Probably would prefer that if we just end up with a bloody dusting.
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Yes, any humidity off the sea will lower as it crosses more land so the midlands (and those at higher elevation) will always do better than an area next to the coast. The issue tonight is that the mixing is sufficient to MAYBE cause issues for lowland areas. Someone has already seen rain in Telford in an area around 80-100m, so it's clearly unfavourable for some.
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Just taking GFS as one example. Upper air mixed to -4C from -7/-8c earlier today. Dew points mixed to 0C from -3C earlier today. 2M temperatures possibly rising above freezing in some places. They were -1/-2C today. 0C isotherm rising from 200m to 500m
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Not mild at the surface, however the upper air may be mixed significantly enough later tonight for low areas to struggle.
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Staffords difficult, certainly snow from the band coming through this evening, however much of Stafford sits at about 50-80m due to the river Sow & Penk, so could be marginal into Friday.
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Different layers of the atmosphere can have different win directions. Surface flow is Southwesterly (travelling NE), but upper air is a Northwesterly (travelling SE).
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I think areas in the 'West Midlands Plateau' which I call an area covering a clockwise pentagon from Wolverhampton, Lichfield, Coventry, Redditch and Stourbridge should be okay tonight for snow as average heights asl are roughly 100m+ Areas south of the big smoke ie. Worcestershire/Warwickshire around the Severn and Avon may have a difficult night for snow, especially so as the night goes on.
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The higher up you are, the better of course. The 0C isotherm looks to be around 100-200m tonight and dew points will be around the same so that will give you a rough idea.
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Could the lack of bullishness from the Metoffice regarding snow depths be because the snow may not be particularly hard? We had a few light showers yesterday morning that gave a light dusting, but as soon as the sun came up (behind overcast skies) it had melted away and the snow, even when it got slightly harder, ended up just making the ground wet.
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15 hours for here. Needs to be at least 18 for me to get excited.
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Model output discussion - Jan 3rd onwards
Eskimo replied to bluearmy's topic in Forecast Model Discussion
No, simply just pointing out the lack of sea ice this year compared to previous years. Nothing to do with model output. -
Model output discussion - Jan 3rd onwards
Eskimo replied to bluearmy's topic in Forecast Model Discussion
Definitely a signal from the models for high pressure to build south of the UK. Hopefully it's just temporary and doesn't turn into, you know, that name that's forbidden. -
Model output discussion - Jan 3rd onwards
Eskimo replied to bluearmy's topic in Forecast Model Discussion
Let's just hope this is just our 'temporary blip' before conditions turn colder as progged by the MetOffice -
Model output discussion - Jan 3rd onwards
Eskimo replied to bluearmy's topic in Forecast Model Discussion
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Absolutely belting it down here in south birmingham. 2-3cm now I think.
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Update on the snow front for Tomorrow afternoon/evening across the board. WRF & Harmonie probably the most keen on precip rates with ICON & Arpege wondering what the fuss is about.
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Definitely something up with the GFS at the minute as it's showing the wrong timeframe. Normally would show 19:00, 01:00, 07:00, 13:00 etc. However it's showing an hour ahead (i.e. 20:00, 02:00...)