Typhoon John
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Posts posted by Typhoon John
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6 minutes ago, Nick F said:
Powder snow does seem to have amazing powers, not only is it prone to cause great drifts if its windy unlike snow with high water content that sticks to everything, it can find its way through the smallest cracks. Always remember the infamous 'wrong kind of snow' which I think was coined by the back then British Rail in the Feb 1991 severe cold and snowy spell. The dry powder snow infiltrated the mechanics of the electric train motors and caused issues with short-circuiting. I remember getting a train home to Kent from London on the onset of the Jan 1987 severe spell and remember the powder snow coming inside through the gaps between doors on the train, amazing qualities it has.
Anyway, going off topic. Easterly arctic continental flows are inherently dry at the surface, so snow falling from moister upper levels tends to have lower water content that the moister polar maritime air that brought snow back in January via the NW.
06z GFS op for London quite close to the average of the GEFS spread through most of the run, quite a few colder options in there, not really any sign of a 'warm up' until late in the run - which is too far out to have any guidance. Certainly good scope to stay cold for most all of next week.
Powder snow also has higher ratios. 1:10 may be typical but get dry powder and it can increase up to 1:40 and create huge snow depths in the right conditions. Also a chance to see some stellar dendrites if it is cold enough!
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3 minutes ago, Drifter said:
What is that purple stuff across Europe?
Freezing Rain
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Heavy snow here in East London near Victoria Park settling everywhere
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Do you think we could get close to any rainfall records?
405mm in 48 hours
456mm in 72 hours
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2 hours ago, Weather-history said:
Here's the December 2010 CET thread
I went with 4C!
Though to be fair my guess was early and I probably forgot to revise it.
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I didn't play last year, I'll give it a go this time.
7.0C
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Raining. It's been raining almost non-stop now for over 24 hours
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On 25/09/2020 at 11:17, Relativistic said:
I wonder what our chances are of dropping even lower? How about Sunday morning? Setup looks decent plus approximately 15 minutes more darkness than Wednesday night.
Sunday night looks like the best bet to me. Seems to be more wind than expected, really need that to stay calm.
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Reading the NHC discussions, it seems Marco became a depression before Laura reached the Gulf. Therefore didn't even manage two TS in the Gulf at the same time, nevermind two hurricanes as was being hyped by the press at the weekend.
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Is it fair to say that in the past, prior to having so much data available, Marco would only ever have been a Tropical Storm?
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Fairly intense shower there with one clap of thunder. Suprisingly lacking in lightning activity in comparison to the other two cells over London despite the whites and purples on the radar.
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I've finally had a storm overhead for about 25 minutes. I didn't see any lightning, but had maybe 5 flashes and rumbles. Fairly intense rain though despite the highest rates being to my South on the radar.
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Is there a chance of anything for London later? We've had had some rain today and I heard thunder in the distance this morning but no storms yet. Everything seems to be kicking off to the North instead
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What are chances in the south today, any forecasts out? Last night was frustrating again as everything was just to my north. We managed one proper strike, a few distant flashes and 5 mins of rain. You'd be annoyed if it had woken you up.
Good to hear reports from others of some decent storms.
I just can't believe the lack of activity here considering the warnings all week.
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We've managed 5 mins of rain now and had a single flash of lightning. I suppose I should stop complaining
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10 minutes ago, Daniel* said:
Really taking the P now the Rotherhithe weather shield there’s no getting past it. Revoltingly humid too 80% humidity.
This shows it well, last 24 hours accumulation, but may as well be all week
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5 minutes ago, Jamiee said:
Another storm popping up in Central London!
I can't believe it's waited to pass over me before re-intensifying
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2 hours ago, Typhoon John said:
Looks like this London storm is going to miss me here in the East. Frustrating to have now had storms North, South and West of me in the last couple of days but nothing over us. We've had about 30 seconds of rain.
Completing the set of compass points, now have had a storm to the East which is dying before it gets here.
Doesn't look good for the rest of tonight.
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Looks like this London storm is going to miss me here in the East. Frustrating to have now had storms North, South and West of me in the last couple of days but nothing over us. We've had about 30 seconds of rain.
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Very frustrating here, everything is happening just to my West or North
Model output discussion - deep cold inbound?
in Forecast Model Discussion
Posted
If the block is a little stronger to the east we could see that low stall further west and send WAA up the West of Ireland which would help to reinforce the block. That would subsequently drag in the colder air over Scandinavian. That would be my preferred outcome. If it does try to come through you would expect it to disrupt more than is being shown.