Convective Storm/Discussion thread - 02/09/16 onwards

[Ben Sainsbury]

1 minute ago, Michellelovescats said:

46 a  min according to realtimelightningmaps

 

Was going to say PIT did you mean 80 per minute max?

[Mapantz]

There could well be issues around Garforth: https://www.wunderground.com/personal-weather-station/dashboard?ID=IGARFORT3

[Weather-history]

Still getting the odd lightning flash and rumble of thunder 

[East_England_Stormchaser91]

5 minutes ago, Speedway Slider said:

Please define "Right Mover"

Cheers 

 

 

a term that is given to a storm when it begins to take a more easterly track as to what it was previously. It can often be a sign that it has developed more severe characteristics and has perhaps become supercellular. 

[Kirsty Wood]

Wakefield now 

[Ben Sainsbury]

A picture taken from Hillsborough:

 

[Rob Walker]

3 minutes ago, Michellelovescats said:

46 a  min according to realtimelightningmaps

 

 

1 minute ago, Ben Sainsbury said:

Was going to say PIT did you mean 80 per minute max?

I don't know which site it is that people use but there often seems to be an exaggeration of strike per minute rates...

[Michellelovescats]

Netweather.tv

11 mins · 

Over 18,000 lightning strikes so far on the #HottestDayOfTheYear

[Mapantz]

1 minute ago, Rob Walker said:

 

I don't know which site it is that people use but there often seems to be an exaggeration of strike per minute rates...

Well this works out at around 51 per minute, that includes the strikes in the far Southwest.

[Ben Sainsbury]

1 minute ago, Rob Walker said:

 

I don't know which site it is that people use but there often seems to be an exaggeration of strike per minute rates...

Not neccesarily so, for example back when the MCS went up through the spine of England into East Midlands, there were rates of 100 strikes per minute, so I'm not surprised given the storm severity.

[Michellelovescats]

Just now, Mapantz said:

Well this works out at around 51 per minute, that includes the strikes in the far Southwest.

ah i only did those up north, forgot there was some down in sw too

[Paul]

4 minutes ago, Rob Walker said:

I don't know which site it is that people use but there often seems to be an exaggeration of strike per minute rates...

It can be a problem with the sites which use personal lightning detectors as they do a time difference thing to locate strikes, but pc clocks differ, net connections can delay the transmission etc, so a strike which is detected by several detectors some way apart can end up being recorded as multiple strikes.

As far as ATD goes, we're over 18,000 for the day.

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

 

[Schnee]

5 minutes ago, Mapantz said:

There could well be issues around Garforth: https://www.wunderground.com/personal-weather-station/dashboard?ID=IGARFORT3

I'm a few miles west in Crossgates. It's spitting here....xD!

[The PIT]

3 minutes ago, Rob Walker said:

 

I don't know which site it is that people use but there often seems to be an exaggeration of strike per minute rates...

My Bolteks the pair of them measured 800 strikes per minute now down to 62 per minute. You can argue will Boltek you like but I can only report on what they say. From a distance the lightning was none stop as was the Thunder so it was a severe storm.

[carl1980]

Still from a video I did 10 mins ago looking east

[Boro Snow]

Lightning seen to my south 

[Rob Walker]

1 minute ago, Ben Sainsbury said:

Not neccesarily so, for example back when the MCS went up through the spine of England into East Midlands, there were rates of 100 strikes per minute, so I'm not surprised given the storm severity.

Sorry i was referring to the post you posted on earlier forgot to quote it lol (800 to 330 strikes per min claim)

[P-M]

1 minute ago, Boro Snow said:

Lightning seen to my south 

I can't believe it's maintained itself this long!  keep me updated as I'm not that far north of you!

[Costa Del Fal]

If that mass of storms in W France can maintain it to here, it could be pretty good. Most models do expect a large mass of activity to spill out from this region over the night heading to Cornwall and the Scilly Isles. Chance it could steer into the Channel only though.

[A.J]

for clarity.....TORRO's definition of a severe thunderstorm:

"TORRO defines a severe thunderstorm as a thunderstorm which has one or more of the following:

one or more tornadoes and / or one or more waterspouts,

hail intensity of at least H3 at ground level,

non-tornadic winds gusting to 55 mph or more at surface.

a thunderstorm which fulfils the criteria of a severe thunderstorm and, additionally,

a thunderless storm which is accompanied by one or more of the following:

one or more tornadoes and / or one or more waterspouts,

hail intensity of at least H3 at ground-level,

non-tornadic winds gusting to at least 55 mph at surface (but which are not part of synoptic-scale straight-line winds of such velocities)."

 

The American definition of 'severe thunderstorm' is pretty much the same.......

[Boro Snow]

3 minutes ago, P-M said:

I can't believe it's maintained itself this long!  keep me updated as I'm not that far north of you!

Still 40km away but lightning getting more frequent 

[joggs]

That was epic here.Still lightening around albeit not severe now.Git to say for 10 mins it was constantly lightening.Not thunder with it all though and torrential rain for 15 mins or so.8:02 pm.A sickening crack of thunder.

Lightening was beautiful.Forked,sheet,cloud,running flashes,horizontal.purple,gold.

Best storm in many a year for this location.

Goodluck further north.

[P-M]

Just now, Boro Snow said:

Still 40km away but lightning getting more frequent 

What's the intensity like - does it look frequent or just a standard affair?

[Evening thunder]

12 minutes ago, Paul said:

It's can be a problem with the sites which use personal lightning detectors as they do a time difference thing to locate strikes, but pc clocks differ, net connections can delay the transmission etc, so a strike which is detected by several detectors some way apart can end up being recorded as multiple strikes.

As far as ATD goes, we're over 18,000 for the day.

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

 

Yes, I notice that (whenever we have storms in fact, including today). It's pretty common for a single strike to be recorded as 3 or 4 strikes simultaneously. I thought maybe it was recording different sections of the 'same' strike as intracloud lightning can be quite long, or you can get multiple CG connections at once, however that explanation makes sense.

I therefore think Blitzortung overestimates strike numbers in the UK, even more so around Germany where they have the most detectors.

Conversely I have seen the ATD underestimate it on occasion, especially during the night (late evening and the early hours) with far fewer strikes detected and more inaccurate locations than most other times, for some reason.

Edited September 13, 2016 by Evening thunder

[Boro Snow]

Standard but that's because it's too far away at the mo, radar looking good