Thunder on Sunday
 

How likely in Sheffield?

Thunder on Sunday
 

If this comes off it's going to get a tad scary.... thunder almost
certain along with hail, gusty winds, torrential rain, tornadoes.....!!

http://www.wetterzentrale.de/pics/Rtavn5411.html

Les

C wrote:
How likely in Sheffield?



--
Les Crossan,
Wallsend, Tyne & Wear
54.95N 1.5W
Home of the Wallsend StormCam and the Backup USW FAQ -
www.uksevereweather.org.uk

Thunder on Sunday
 

"Les Crossan" wrote in message
. uk...
If this comes off it's going to get a tad scary.... thunder almost
certain along with hail, gusty winds, torrential rain, tornadoes.....!!


Cape/Lifted Index.

Am I right in thinking that this is in simplistic terms, a measure
of atmospheric instability?

Col
--
Bolton, Lancashire.
160m asl.
http://www.reddwarfer.btinternet.co.uk
http://www.reddwarfer.btinternet.co....rPictures.html

Thunder on Sunday
 

Col wrote:
"Les Crossan" wrote in message
. uk...

If this comes off it's going to get a tad scary.... thunder almost
certain along with hail, gusty winds, torrential rain, tornadoes.....!!



Cape/Lifted Index.

Am I right in thinking that this is in simplistic terms, a measure
of atmospheric instability?

Col

A bit more about it here...

http://homepage.ntlworld.com/booty.w...opics.htm#CAPE

--
Keith (Southend)

'Weather Home & Abroad'
http://www.southendweather.net

Thunder on Sunday
 

As CAPE goes up the chances for thunderstorms increase. As LI goes down
the chances of severe weather increase. There are other factors involved
(moisture, temperature, topography, whole - atmosphere) but CAPE that
high and LI that low are not common in the UK.

This is from Bernhard Oker's website:

LIFTED INDEX:
0 Thunderstorms unlikely
0 - -2 Thunderstorms possible - trigger needed
-3 - -5 Thunderstorms probable
-5 - -7 Strong/severe thunderstorms. Tornadoes possible
-7 - -9 Move to Alaska
-9 Yikes

CAPE:
300 Weak convection (showers)
300-1000 Weak thunderstorms
1000-2500 Moderate thunderstorms
2500-3000 Strong thunderstorms
3000+ Very Strong thunderstorms

Col wrote:
"Les Crossan" wrote in message
. uk...

If this comes off it's going to get a tad scary.... thunder almost
certain along with hail, gusty winds, torrential rain, tornadoes.....!!



Cape/Lifted Index.

Am I right in thinking that this is in simplistic terms, a measure
of atmospheric instability?

Col

--
Les Crossan,
Wallsend, Tyne & Wear
54.95N 1.5W
Home of the Wallsend StormCam and the Backup USW FAQ -
www.uksevereweather.org.uk

Thunder on Sunday
 

"Les Crossan" wrote in
message . uk...
As CAPE goes up the chances for thunderstorms increase. As LI goes down
the chances of severe weather increase. There are other factors involved
(moisture, temperature, topography, whole - atmosphere) but CAPE that high
and LI that low are not common in the UK.

This is from Bernhard Oker's website:

LIFTED INDEX:
0 Thunderstorms unlikely
0 - -2 Thunderstorms possible - trigger needed
-3 - -5 Thunderstorms probable
-5 - -7 Strong/severe thunderstorms. Tornadoes possible
-7 - -9 Move to Alaska
-9 Yikes

CAPE:
300 Weak convection (showers)
300-1000 Weak thunderstorms
1000-2500 Moderate thunderstorms
2500-3000 Strong thunderstorms
3000+ Very Strong thunderstorms

Col wrote:
"Les Crossan" wrote in
message
. uk...

If this comes off it's going to get a tad scary.... thunder almost
certain along with hail, gusty winds, torrential rain, tornadoes.....!!



Cape/Lifted Index.

Am I right in thinking that this is in simplistic terms, a measure
of atmospheric instability?

Col

--
Les Crossan,
Wallsend, Tyne & Wear
54.95N 1.5W
Home of the Wallsend StormCam and the Backup USW FAQ -
www.uksevereweather.org.uk

So what is Sheffield on the LIFTED INDEX:?

Thunder on Sunday
 

C wrote:
"Les Crossan" wrote in
message . uk...

As CAPE goes up the chances for thunderstorms increase. As LI goes down
the chances of severe weather increase. There are other factors involved
(moisture, temperature, topography, whole - atmosphere) but CAPE that high
and LI that low are not common in the UK.

This is from Bernhard Oker's website:

LIFTED INDEX:

0 Thunderstorms unlikely

0 - -2 Thunderstorms possible - trigger needed
-3 - -5 Thunderstorms probable
-5 - -7 Strong/severe thunderstorms. Tornadoes possible
-7 - -9 Move to Alaska
-9 Yikes

CAPE:
300 Weak convection (showers)
300-1000 Weak thunderstorms
1000-2500 Moderate thunderstorms
2500-3000 Strong thunderstorms
3000+ Very Strong thunderstorms

Col wrote:

"Les Crossan" wrote in
message
. co.uk...


If this comes off it's going to get a tad scary.... thunder almost
certain along with hail, gusty winds, torrential rain, tornadoes.....!!



Cape/Lifted Index.

Am I right in thinking that this is in simplistic terms, a measure
of atmospheric instability?

Col

--
Les Crossan,
Wallsend, Tyne & Wear
54.95N 1.5W
Home of the Wallsend StormCam and the Backup USW FAQ -
www.uksevereweather.org.uk


So what is Sheffield on the LIFTED INDEX:?


minus 6 Sunday

--
Keith (Southend)

'Weather Home & Abroad'
http://www.southendweather.net

Thunder on Sunday
 

"Les Crossan" wrote in message
. uk...
As CAPE goes up the chances for thunderstorms increase. As LI goes down
the chances of severe weather increase. There are other factors involved
(moisture, temperature, topography, whole - atmosphere) but CAPE that
high and LI that low are not common in the UK.

This is from Bernhard Oker's website:

LIFTED INDEX:
0 Thunderstorms unlikely
0 - -2 Thunderstorms possible - trigger needed
-3 - -5 Thunderstorms probable
-5 - -7 Strong/severe thunderstorms. Tornadoes possible
-7 - -9 Move to Alaska
-9 Yikes

CAPE:
300 Weak convection (showers)
300-1000 Weak thunderstorms
1000-2500 Moderate thunderstorms
2500-3000 Strong thunderstorms
3000+ Very Strong thunderstorms


Thanks to you and Keith for the info!

Col
--
Bolton, Lancashire.
160m asl.
http://www.reddwarfer.btinternet.co.uk
http://www.reddwarfer.btinternet.co....rPictures.html

Thunder on Sunday
 

Bloody hell I hate jargon.

It'll never replace birds perched on rooftops and the times of the
phases for me.

Damned Bee Bloody C!


--
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