Nick F

Convective / Storm Discussion Thread - 27th Feb onwards

96 posts in this topic
2 minutes ago, Windblade said:

Err, that must be right, my bad. Thought it was called the solstice, must be my dodgy memory letting me down!

 The solstices are in June and December when the Sun reaches the furthest north and south on the ecliptic respectably. :-) 

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Posted (edited)

I see scotland got a pounding this morning according to netweathers latest forecast article on the homepage. Looks like it was a real good one with multiple strikes. I would've loved to have been there to see that. I'd say by the great pics of cb's in this thread and the recent radar activity storm season is just about getting started now. Bring it on. :)

Edited by Windblade
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Posted (edited)

5 minutes ago, Chris.R said:

 The solstices are in June and December when the Sun reaches the furthest north and south on the ecliptic respectably. :-) 

Ah, I see, thanks for the info! As someone who is interested in Astrology and wanting to learn more about it I really should know that!

 

Edited by Windblade
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Well, after an abysmal winter, its all eyes to the summer and thunderstorms! Lets hope 2017 is an active year! 

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Just been pottering about in the garden (being as I'm on holiday for the week), and i looked up and saw this stunning cloudscape bubbling up the otherside of the mountains.:blink2::shok::D
If only it was summer *sigh* :bomb:

IMG_8185.JPG

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3 hours ago, Dangerous55019 said:

Just been pottering about in the garden (being as I'm on holiday for the week), and i looked up and saw this stunning cloudscape bubbling up the otherside of the mountains.:blink2::shok::D
If only it was summer *sigh* :bomb:

IMG_8185.JPG

We had some convective cloudscapes in Limousin a couple of weeks ago and it was delightful to see. I too am looking forward to some good t-storms - and storm watching with my Collie baby!

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Day 2 Convective Outlook

VALID 06:00 UTC Sun 19 Mar 2017 - 05:59 UTC Mon 20 Mar 2017

ISSUED 20:44 UTC Sat 18 Mar 2017

ISSUED BY: Dan

In the post-frontal environment, steepening lapse rates will yield an environment favourable for numerous showers and a few weakly-electrified thunderstorms across the far north of Scotland and (more likely) over Orkney and Shetland - especially late afternoon into the evening hours. 40-50kts DLS and strong steering motion will mean any one individual shower will pass through quickly, but could produce some localised gusts of 60-70mph and perhaps some small hail. Showers are also likely in W Scotland / Hebrides, but convective depth will be generally more limited farther south.

Later in the night, a cold air feature (showery occlusion which several NWP solutions develop into a discrete closed surface low, with several other solutions keeping it instead as a much more open feature) will approach W/SW Scotland, with showery precipitation extending northwards and eastwards into Monday morning. Instability looks quite marginal, but given potential for notable forcing with this feature there is the potential for some isolated lightning activity - hence the extension of the LOW to cover much of mainland Scotland.

http://www.convectiveweather.co.uk/forecast.php?date=2017-03-19

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Nice squall line just passed through, ,noticeably colder behind.

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A few sferics being picked up in those showers around Lancashire and West Yorkshire. Tomorrow looks like a day whereby there could be a few flashes and rumbles around the heaviest showers too.

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Thundersnow reported in the Yorkshire Dales near Hawes in the last hour. Tomorrow looks good too!

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Storm & Convective Forecast

convmap_210317.thumb.png.d3e6c623f64257905f9dbae520c607d7.png

Issued 2017-03-21 10:04:05

Valid: 21/03/2017 06z to 22/03/2017 06z

CONVECTIVE/STORM FORECAST - TUESDAY 21ST MARCH 2017

Synopsis

Upper-level trough will move in towards western Britain today, with surface low pressure to the N and W, driving a strong cyclonic SWly flow across the UK. Cold air of polar origin spreading east with arrival of upper trough to the west will create an unstable / showery flow across the UK today, with a risk of hail and thunder almost anywhere.

... UK and IRELAND ...

A broad forecast for scattered thunderstorm potential across much of the UK and Ireland on Tuesday, as cold air spreads east aloft in association with upper low arriving to the west atop of surface which will be modestly warmed in clear skies - creating instability. Already a few t-storms over Scotland where lapse rates are steepest, but through the day chance of t-storms becoming more widespread as increasingly cold air spreads east aloft and diurnal surface heating increases. Despite 30-40 knts of deep-layer shear, cumulonimbus will tend to be fairly low-topped along with low dew points / warmth - which will tend to limit severe potential to negligible. Though showers/storms likely to align in bands with SWly/Wly streamlines bringing risk of localised flooding in the NW where they'll be most frequent. Also showers/storms maybe accompanied by small hail and gusty winds.

Issued by: Nick Finnis

http://www.netweather.tv/index.cgi?action=convective;sess=

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Just had 2 rumbles of thunder from this!

IMG_4546.JPG

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Just got pelted by heavy hail no thunder unfortunately. 

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Heavier bursts to the North of the city.....noticing the sferics in West Wales

IMG_1446.thumb.JPG.d327a6ec78b8f6f2066bbd8e8f79b945.JPG

IMG_1452.JPG

Edited by Arnie Pie
changing wheathersmall pea hail coming through city now
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No showers here today, but it is nice to have the bubbling cloudscapes back again. :)

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Some hail showers about and nice convection ,no thunder as yet though had some last night 

 

Edited by Mokidugway

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Storm & Convective Forecast

convmap_220317.thumb.png.a243ad02bf1604f317515a88194c8d56.png

Issued 2017-03-22 10:43:42

Valid: 22/03/2017 06z to 23/03/2017 06z

CONVECTIVE/STORM FORECAST - WEDNESDAY 22ND MARCH 2017

Synopsis

Upper-level trough extending SE across far western Europe will disrupt into a cut-off upper level low over the Bay of Biscay today. At the surface, an area of low pressure centred over Wales this morning will drift slowly south and fill, with associated slow-moving occluded frontal system lying across EIRE and central UK, while cold front moves slowly east across eastern England with an unstable Polar maritime (Pm) airmass edging east across Wales, Midlands, southern and western England later this morning and into the afternoon.

... S IRELAND, WALES, W ENGLAND, MIDLANDS and C/S ENGLAND ...

Clearer skies with sunny spells following cold front with its bands of rain moving east across England this morning coupled with increasingly cold mid-level temperatures towards the west will create steep lapse rates across the above areas with surface heating in sunshine. This will support the development of scattered heavy showers and isolated weakly-electrified thunderstorms into the afternoon and early evening, before diurnal heating wanes after dark and storm risk fades. Any showers/storms may produce hail, gusty winds and localised flooding. No severe weather is expected - given weak shear where strongest instability is indicated - coupled with cool surface airmass and shallow instability.

Issued by: Nick Finnis

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We had one lovely, loud rumble of thunder in the Aire Valley on Monday evening and pea sized hail both then and Tuesday morning before we left. The storm season is approaching...

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Well, Barcelona have had a humdinger tonight. Looked great on webcam. Probably not so great for my daughter whose plane was hit by lightning coming into land

Edited by Frosty hollows

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Looks like this coming week may offer some early season storm opportunities from as early as Tuesday.

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