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VillagePlank Seasoned

VillagePlank

Posted
  • Location: Rochester, Kent
  • Location: Rochester, Kent
Posted (edited)

why is that?

A dewpoint depression is a rather large, relatively, difference between the temperature line and the dewpoint line.

Given that the surface is bouyant (low LI) a big difference between the temperature line and the dewpoint line higher up in the atmosphere can mean that clouds get a 'dry punch' At 7-8km up (around 400-300mb) that should be right at the top of the cloud (approx 350mb)

All overcast, here - so I won't get to see anything (if indeed there's anything to see), anyway.

Edited by Sparticle
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Biggin Rising Star

Biggin

Posted
  • Location: Langley Waterside, Beckenham
  • Location: Langley Waterside, Beckenham
Posted

Sorry for being a bit thick but why is that?

Looking at the latest GFS I asume this is what is causing sharp increase in the sale of Valium at the moment.

No wonderwhistling.gif

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Arnie Pie Accomplished

Arnie Pie

Posted
  • Location: Birmingham, Harborne 160 asl
  • Weather Preferences: Columus Bigus Convectivus
  • Location: Birmingham, Harborne 160 asl
Posted

Some big lumps out to our West (Bridgnorth way)... just starting to convect in the clear blue skies

The swifts arn`t doing anything out of the ordinary... so i`m not holding my breath for storms :pardon:

post-12214-0-30400300-1308740297_thumb.j

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stormchaser1 Explorer

stormchaser1

Posted
  • Location: North Kenton (Tyne-and-Wear)6miles east from newcastle airport
  • Location: North Kenton (Tyne-and-Wear)6miles east from newcastle airport
Posted

Afternoon everyone

Nothing heard in Newcastle as of yet, however we have had 5 mm of rain already this morning,

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Raidan Enthusiast

Raidan

Posted
  • Location: BRISTOL
  • Location: BRISTOL
Posted

After rain this morning it's turned out quite nice,sun is shining and mostly blue sky,feels warm in the sun,not expecting any storms here today but would be nice if something popped up out of the blue.

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A.J Maestro

A.J

Posted
  • Location: Sunderland
  • Weather Preferences: Hot Summer, Snowy winter and thunderstorms all year round!
  • Location: Sunderland
Posted

Thought I'd drop in and post some storm-porn charts from the 06z GFS.....Insane CAPE & Lifted Index values and I've never seen dew-points so high on a UK GFS chart.....Still pure fantasy at this point in time, but certainly makes for eye dropping viewing!....I've had a look at the lastest FAX charts and the promising sign is that at 12z on Sunday, the CF is still way out to the west, barely grazing the tip of Ireland, and the 06z GFS delays the LP from moving in, hopefully a trend that will continue for storm lovers

charts for monday...

CAPE & Lifted Index

post-4149-0-89445000-1308740561_thumb.pn

Max Temperature...

post-4149-0-69407000-1308740593_thumb.pn

Dew Points...

post-4149-0-58498600-1308740626_thumb.pn

charts for tuesday...

CAPE & Lifted Index

post-4149-0-13058300-1308740671_thumb.pn

Max Temperatures

post-4149-0-37538700-1308740698_thumb.pn

Dew Points

post-4149-0-91572300-1308740724_thumb.pn

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weatherobsuk Veteran

weatherobsuk

Posted
  • Location: Whaley Bridge - Peak District
  • Location: Whaley Bridge - Peak District
Posted

Wimbledon about to start at 15 past. SW19 5AE is the postcode for anyone with the NW radar interested in watching the convection passing over London, disrupting play :whistling:

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Coast Veteran

Coast

Posted
  • Location: Eastbourne, East Sussex (work in Mid Sussex)
  • Location: Eastbourne, East Sussex (work in Mid Sussex)
  • Author
Posted

Thought I'd drop in and post some storm-porn charts from the 06z GFS.....Insane CAPE & Lifted Index values and I've never seen dew-points so high on a UK GFS chart

This started kicking off yesterday and although I don't want to get too excited too soon, it's been a long long while since we've seen such potential. Whilst the timing, values and all other prerequisites have to be in place a few hours before hand, I'll be keeping a close eye on developments when the other major charts come into range.

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knocker Maestro

knocker

Posted
  • Location: Camborne
  • Location: Camborne
Posted

A dewpoint depression is a rather large, relatively, difference between the temperature line and the dewpoint line.

Given that the surface is bouyant (low LI) a big difference between the temperature line and the dewpoint line higher up in the atmosphere can mean that clouds get a 'dry punch' At 7-8km up (around 400-300mb) that should be right at the top of the cloud (approx 350mb)

All overcast, here - so I won't get to see anything (if indeed there's anything to see), anyway.

Yes I know what the dewpoint depression is and you would expect it to increase just below the trop. anyway. I think we'll give the 'dry punch' a miss for the moment.

Just a personal observation but I don't put too much credence on these forecast tephis because for obvious reasons detail is lacking.

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Thundery wintry showers Accomplished

Thundery wintry showers

Posted
  • Location: Lincoln, Lincolnshire
  • Weather Preferences: Sunshine, convective precipitation, snow, thunderstorms, "episodic" months.
  • Location: Lincoln, Lincolnshire
Posted

Well, I should have known really- this band of showers moving south through Tyneside is associated with a change to northerlies and is bringing Cleadon the usual dull drizzly coastal weather. :lol:

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VillagePlank Seasoned

VillagePlank

Posted
  • Location: Rochester, Kent
  • Location: Rochester, Kent
Posted (edited)

Can someone who has NetW extra post up the skew-t charts for Monday and Tuesday, please? I know it's cheeky ...

Yes I know what the dewpoint depression is and you would expect it to increase just below the trop. anyway. I think we'll give the 'dry punch' a miss for the moment.

Just a personal observation but I don't put too much credence on these forecast tephis because for obvious reasons detail is lacking.

tephis?

It's because it's forecast to be before the cloud max that's interesting, not that it exists. Well, interesting to me!.

Anyhoo, moving on ...

Edited by Sparticle
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Guest

Guest

Posted
Posted

AJpoolshark - I usually object to people posting FI charts like that, as they're so often downgraded. However like you say those charts are so jaw-droppingly, salivatingly, orgasmically juicy that I don't blame you one bit for posting them! We can dream! :lol:

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Coast Veteran

Coast

Posted
  • Location: Eastbourne, East Sussex (work in Mid Sussex)
  • Location: Eastbourne, East Sussex (work in Mid Sussex)
  • Author
Posted

Can someone who has NetW extra post up the skew-t charts for Monday and Tuesday, please? I know it's cheeky ...

Yes it is!!! for where and what time?

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stormchaser1 Explorer

stormchaser1

Posted
  • Location: North Kenton (Tyne-and-Wear)6miles east from newcastle airport
  • Location: North Kenton (Tyne-and-Wear)6miles east from newcastle airport
Posted

Rain has arrived again

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stormchaser1 Explorer

stormchaser1

Posted
  • Location: North Kenton (Tyne-and-Wear)6miles east from newcastle airport
  • Location: North Kenton (Tyne-and-Wear)6miles east from newcastle airport
Posted

EAST ANGLIA SKEW CHART FOR MONDAY , CHECK OUT THE CAPE WOW

post-4475-0-25868100-1308742916_thumb.pn

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NL Aficionado

NL

Posted
  • Location: South Shields Tyne & Wear half mile from the coast.
  • Location: South Shields Tyne & Wear half mile from the coast.
Posted

Well, I should have known really- this band of showers moving south through Tyneside is associated with a change to northerlies and is bringing Cleadon the usual dull drizzly coastal weather. :lol:

Did look promising earlier though Ian.

Time-lapsed convection earlier and near the end of the video you can see low cloud inflow flying in from the sea , unfortunately my battery died in the camera so I was unable to shoot much more.

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stormchaser1 Explorer

stormchaser1

Posted
  • Location: North Kenton (Tyne-and-Wear)6miles east from newcastle airport
  • Location: North Kenton (Tyne-and-Wear)6miles east from newcastle airport
Posted

London Bridge monday

post-4475-0-83667900-1308743136_thumb.pn

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Coast Veteran

Coast

Posted
  • Location: Eastbourne, East Sussex (work in Mid Sussex)
  • Location: Eastbourne, East Sussex (work in Mid Sussex)
  • Author
Posted

London, Mon + Tues (12z-15z) if that's OK. I should really cough up, I know ...

Yes, if nothing else you're missing out on some great stuff! Anyway, its kicking me out at the moment, so here some for places 'close by' at 1400 hrs from another source:

sounding10.curr.1400lst.d2.png

sounding3.curr.1400lst.d2.png

sounding11.curr.1400lst.d2.png

sounding2.curr.1400lst.d2.png

and some more to tantalize......

cape.curr.1030lst.d2.png

sfcdewpt.curr.1030lst.d2.png

sfcsunpct.curr.1030lst.d2.png

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stormchaser1 Explorer

stormchaser1

Posted
  • Location: North Kenton (Tyne-and-Wear)6miles east from newcastle airport
  • Location: North Kenton (Tyne-and-Wear)6miles east from newcastle airport
Posted

Dont think i have seen CAPE this high especially for Newcastle Upon Tyne

ok this will be downgraded by monday, but JUST THINK IF THIS CAME OFF

WOW, And im working {on days } drat and double drat

post-4475-0-64819200-1308744048_thumb.pn

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Hughsey Newbie

Hughsey

Posted
  • Location: South Peterborough
  • Location: South Peterborough
Posted (edited)

am off to wimbledon tomorrow, can anyone tell me what the weather forecast is, thanks

loving the forecast for monday, looks perfect for me, same it wont happen (reverse physchology)

Edited by hughsey
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Biggin Rising Star

Biggin

Posted
  • Location: Langley Waterside, Beckenham
  • Location: Langley Waterside, Beckenham
Posted

London Bridge monday

Nearly 2.5K Capewhistling.gif If only its still there Mon.
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Joneseye Explorer

Joneseye

Posted
  • Location: Newbury Berkshire
  • Location: Newbury Berkshire
Posted

One word of caution when looking at those charts for next week is the propensity of the GFS to overdo the dew points. Predicted dew points of 22C on Monday? I will eat my hat if they get much above 16C. Still the potential is there for reasonably high CAPE levels, but don't get too disappointed if they end up being much lower than is currently predicted.

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lewisosd Rookie

lewisosd

Posted
  • Location: Bury St Edmunds, Suffolk
  • Location: Bury St Edmunds, Suffolk
Posted

So yea Monday is looking great! What about today though? Lots of rain here now but not a rumble yet. Just overcast and dull. Any chance do you think???

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Coast Veteran

Coast

Posted
  • Location: Eastbourne, East Sussex (work in Mid Sussex)
  • Location: Eastbourne, East Sussex (work in Mid Sussex)
  • Author
Posted

am off to wimbledon tomorrow, can anyone tell me what the weather forecast is, thanks

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