nav[aria-label="Primary Navigation"] { padding: 0; & ul { list-style: none; width: 100%; display: flex; flex-direction: row; justify-content: start; align-items: start; gap: 30px; padding: 0; & li { margin: 0; } & ul li { list-style: none; } } }

Child Item

Thunderstorms

Snowbie

Continue to post here in the event of all things thunderstorm related,wheather it be radar,maps,charts,forecasts or just simple discussions.

Weather pics(clouds,lightning) in attachments only are allowed here otherwise use [thread=2055050139]Weather pics 2007[/thread] for your snaps.

Over the months you will find some variables or terms describing suitability of storms which are:
CAPE - This is the amount of potential energy in the atmosphere. High CAPE will indicate a high chance of thunderstorms.
LI - Lifted Index (LI) displays the 'trigger' potential at the surface to initiate unstable conditions. A low or negative LI will indicate conditions for thunderstorms are favourable.
Cb-Cumulonimbus or thundercloud.
Anvil-Where the top of the Cb reaches the stratosphere and spreads out like a flat top.
Cell or Supercell-An individual storm or a violent storm.
Squall line-Multi cellular organised storms forming in a line usually ahead or parallel to cold fronts.
Embedded Storms-Storms that are contained in overcast conditions
Convection-Warm air rising,cools,condenses forming cumuli clouds.
Orographic lift-Low level winds are forced to rise against rising terrain ie:mountains.Prevailing wind on a hot summers day,this lift can produce rapid convection.
Convergence zone-usually refers to a region in the atmosphere where two prevailing winds meet and interact, usually resulting in turbulent weather.
Lapse rate steepeing-is another fancy term for instability.

If anyone has any more feel free to post them.

Find more posts tagged with

Quick Links

Comments

Snowbie

darkman2 wrote:

Latest radar is interesting. The convergance is clearly further south now across ther North Midlands.

http://www.met.ie/latest/rainfall_radar.asp

Look to your west dm and see the anvil,must be over meath somewhere.The height has maxed out and is well matured.Picking up lightning from it.

rc28

Snowbie wrote:

Look to your west dm and see the anvil,must be over meath somewhere.The height has maxed out and is well matured.Picking up lightning from it.

Yep, its north west of me, see my pics below.

rc28

It's definitely kicking off to the north now. There is a huge hefty looking shower to my north west, here are some pics:
Attachment not found.
Attachment not found.
Attachment not found.
Attachment not found.
edit:Very sure I heard distant thunder off it, is there much on your detector snowbie?

Snowbie

rc28 wrote:

It's definitely kicking off to the north now. There is a huge hefty looking shower to my north west, here are some pics:
Attachment not found.
Attachment not found.
Attachment not found.
Attachment not found.
edit:Very sure I heard distant thunder off it, is there much on your detector snowbie?

Thats i think is to your WNW of you?I tried to take a pic of it but the sun was interfering.Looks as if its coming your way.
A couple of strikes over the meather area alright as well as to my SW.

rc28

Snowbie wrote:

Thats i think is to your WNW of you?I tried to take a pic of it but the sun was interfering.Looks as if its coming your way.
A couple of strikes over the meather area alright as well as to my SW.

Its moved to my nw now but I dont think i will get it, they aren't travelling from nw to se? I went out a few mins ago again and the clouds have changed shape a lot:
Attachment not found.
Attachment not found.

Edit 21:03
That shower appears to have really died in last while as there is no definition to it's cloud tops anymore.

Supercell

Some ominous clouds to my north, hoping for some measurable rain here

Supercell

Please no more thunder pics here..my 56k can't handle it..maybe a thunderstorm pics tread instead?

rc28

Longfield wrote:

Please no more thunder pics here..my 56k can't handle it..maybe a thunderstorm pics tread instead?

I just attached my pic- it doesn't show up unless you click it. I did it this way because I know there are lots of people still on dial up. I think everyone should be made to do it that way.

Supercell

rc28 wrote:

I just attached my pic- it doesn't show up unless you click it. I did it this way because I know there are lots of people still on dial up. I think everyone should be made to do it that way.

Was replying to highdef m8. Its tidied up now anyhow so no probs.

Snowbie

rc28 wrote:

I just attached my pic- it doesn't show up unless you click it. I did it this way because I know there are lots of people still on dial up. I think everyone should be made to do it that way.

Cheers:)
As suggested in my OP,keep pics attached for this reason.
We all use dial up at one stage and know the story.

Safe to say there is a weak storm over offaly atm and now another strike in Meath.Any input there rc28.

rc28

Snowbie wrote:

Cheers:)
As suggested in my OP,keep pics attached for this reason.
We all use dial up at one stage and know the story.

Safe to say there is a weak storm over offaly atm and now another strike in Meath.Any input there rc28.

I've been inside and wasn't paying attention to listening out for thunder so that's why I haven't heard anything. i had a look outside just there though and can't see much to my west, nw and n anymore but to my south and sw there are much darker clouds. What part of meath is the activity in snowbie?

[Deleted User]

I could see the outline of this activity looking north this evening but obviously it must have been only the inactive clouds to the south of it.
There were some beautiful cb's though-tropical looking and colourfull in the sunset.

I prefer biscay storms as they move north though or the convergence storms from a very hot unstable mid summers day (hotter by far than today).
You know the big ones with the constant fork lightning and the balls running across the sky,the ones that have the unending distant rumbles that just get louder and louder untill they are over head.
There were a few of them last summer-A few this summer would be nice.

Snowbie

Was central Meath and Nw.

http://www.irelandlivelightning.info/

Just click run at the top of the page and it shows roughly where a strike is.

rc28

Snowbie wrote:

Was central Meath and Nw.

http://www.irelandlivelightning.info/

Just click run at the top of the page and it shows roughly where a strike is.

Cheers, that's a good site. Looks like there was a good bit in north central meath- a good bit away from me.

Snowbie

My detector still picking up alot of strikes from that area still,if you look N or NW you may see distant flashes.I suspect you are in Dunboyne Ashbourne area?

aidan_dunne

Well, as you probably would have guessed, nothing developed from that heavy shower we had in Portlaoise earlier, despite my expectations. Looks like things have been pretty interesting in the Meath area over the past hour or so, judging from Snowbie's detector.

If the weather forecast on the telly earlier is anything to go by, they seem to be suggesting that tomorrow is gonna be the "big one", so to speak, with much more widespread and organised thundery showers / storms. What do all you weather experts on here think, is tomorrow more likely to live up to the promise than today did?

ambman

dont think we will have to wait till tommorow. here in cavan lightning and thunder every few seconds and a big scary looking sky:eek:

Snowbie

rc28 this is my live shot of my software i will see a strike when it occurs straight away,what you see on my site is the stormvue java applet which reloads every 60 seconds.
Still going strong up in the north of your county and cavan.

rc28

Snowbie wrote:

rc28 this is my live shot of my software i will see a strike when it occurs straight away,what you see on my site is the stormvue java applet which reloads every 60 seconds.
Still going strong up in the north of your county and cavan.

Cheers for that, I'm between Dunshaughlin and Dunboyne. I was out about half an hour and couldn't see or hear anything-just threatning looking clouds.
Does that pic you posted update automatically or is it just a still jpg?

Snowbie

Its just a snapshot of what i can see,its a live display on my screen though.
Unfortunately the site i upload is at its lowest loop at 60seconds refreshing,so its near real time as i can get it.

All has gone quiet now last strike 8mins ago.

darkman2

Today is going to be very wet. I think we will see very heavy rain but whether it will be thundery or not is impossible to tell.

rc28

Meterireann are ramping today up:D -"severe thundery downpours with the risk of localised flooding". I'm still surprised that yesterdays floods didn't make the news more as Donegal was badly affected too, not just NI. I've noticed on the radar that there's a constant stream of heavy rain from last night into today, there's going to be very serious flooding if they get a repeat of those deluges.

Snowbie

Look at the clump off the south coast atm,see what happens to that when it hits the land.
Little sun today for surface warming so relying on instability over land and any convergence to get showers going today.

Trogdor

What's goin on in terms of wind direction today, does anyone know just looking at the radar, there's a cell moving north-west across Glway and a cell moving north-east in the Irish sea, is there a convergance zone somewhere in the midlands?
http://www.met.ie/latest/rainfall_radar.asp?ani=y

Snowbie

There is a change in wind direction for today with a shift to the east NE later.Westenr areas have a SE wind while here were still SW atm.

Trogdor

Is the rain just starting to fall on the South coast to become enhancned and heavier as it moves north?, as it's already fairly heavy on the south east coast to start with. Keeping on eye the rainfall radar can be my physics study for tomorrow:p

rc28

Many showers have just appeared on latest radar, here drops keep randomly falling from the sky with more persisitent light rain at times. Metoffice have a warning out for NI again.
http://www.metoffice.gov.uk/weather/uk/radar/index.html

sunset

Puzzled by the radar for Co. Cork. Just going out with my coffee onto the patio. Sky is not promising much in the way of storms at the moment.

Snowbie

sunset wrote:

Puzzled by the radar for Co. Cork. Just going out with my coffee onto the patio. Sky is not promising much in the way of storms at the moment.

Its when they hit land there starting to pep up.As i said earlier surface warming is at a minimum today so instability over land is the key here and so far its working producing showers widely.

darkman2

I actually dont think the wind will go onshore at all during daylight hours so we certainly have a chance of storms here. I expect them, like yesterday to start breaking out soon. Not as intense but the convergence zone is across the middle of the country so we have a chance.