The active cold front sweeping across the south of UK is moving fast.
50 mph on my calculation,
or about 22 m/s.
That is quite fast by any standards.

http://www.netweather.tv/index.cgi?a...pos=0&at_tot=4

Len
Wembury, SW Devon

On 29/05/2015 11:28, Len Wood wrote:
The active cold front sweeping across the south of UK is moving fast.
50 mph on my calculation,
or about 22 m/s.
That is quite fast by any standards.

http://www.netweather.tv/index.cgi?a...pos=0&at_tot=4

Len
Wembury, SW Devon

-----------------------------------------------------
Doesn't seem to be rushing through at Headingley !

"Dave Cornwell" wrote in message
...
On 29/05/2015 11:28, Len Wood wrote:
The active cold front sweeping across the south of UK is moving fast.
50 mph on my calculation,
or about 22 m/s.
That is quite fast by any standards.

http://www.netweather.tv/index.cgi?a...pos=0&at_tot=4

Len
Wembury, SW Devon

-----------------------------------------------------
Doesn't seem to be rushing through at Headingley !

Special arrangements are made for Test Matches though.
Cold front waves can develop at a moment's notice!
--
Col

Bolton, Lancashire
160m asl
Snow videos:
http://www.youtube.com/channel/UC3QvmL4UWBmHFMKWiwYm_gg

On Friday, May 29, 2015 at 11:28:17 AM UTC+1, Len Wood wrote:
The active cold front sweeping across the south of UK is moving fast.
50 mph on my calculation,
or about 22 m/s.
That is quite fast by any standards.

http://www.netweather.tv/index.cgi?a...pos=0&at_tot=4

Len
Wembury, SW Devon

Just cleared Penzance. 2.5mm fell in a couple of brief sharp bursts, ending the dry spell. Total May rainfall now 99% of normal.

No squally winds here, strongest gust 25mph in Penzance, never above F4. Strongest gust 36mph on the cliff top at Land's End where it briefly topped F6.
We are at the tail end though, it looks much more active affair further east.

Graham
Penzance

On 29/05/2015 12:09, Graham Easterling wrote:
On Friday, May 29, 2015 at 11:28:17 AM UTC+1, Len Wood wrote:
The active cold front sweeping across the south of UK is moving fast.
50 mph on my calculation,
or about 22 m/s.
That is quite fast by any standards.

http://www.netweather.tv/index.cgi?a...pos=0&at_tot=4

Len
Wembury, SW Devon

Just cleared Penzance. 2.5mm fell in a couple of brief sharp bursts, ending the dry spell. Total May rainfall now 99% of normal.

No squally winds here, strongest gust 25mph in Penzance, never above F4. Strongest gust 36mph on the cliff top at Land's End where it briefly topped F6.
We are at the tail end though, it looks much more active affair further east.


Rain rate peaked at 54mm/hr here.


--

Paul Hyett, Cheltenham

On 29/05/2015 11:28, Len Wood wrote:
The active cold front sweeping across the south of UK is moving fast.
50 mph on my calculation,
or about 22 m/s.
That is quite fast by any standards.

http://www.netweather.tv/index.cgi?a...pos=0&at_tot=4

Len
Wembury, SW Devon


A lot of rain in Southampton for the last 20 minutes.
I made the secondary low that raced through Biscay 04 May 2015 to be
about 53 land miles per hour, up to join the main Low over England, is
that fast? I could not find what was normal/exceptional for that factor

On Friday, 29 May 2015 12:12:39 UTC+1, N_Cook wrote:
On 29/05/2015 11:28, Len Wood wrote:
The active cold front sweeping across the south of UK is moving fast.
50 mph on my calculation,
or about 22 m/s.
That is quite fast by any standards.

http://www.netweather.tv/index.cgi?a...pos=0&at_tot=4

Len
Wembury, SW Devon


A lot of rain in Southampton for the last 20 minutes.
I made the secondary low that raced through Biscay 04 May 2015 to be
about 53 land miles per hour, up to join the main Low over England, is
that fast? I could not find what was normal/exceptional for that factor
================================================== ==========================
That is pretty fast, cold frontal speeds vary of course, even along their length.
But in my experience 10 to 15 m/s (22 to 33 mph) is typical.

Not much rain at a given location in the south due to its speed.
Only 1.2 mm here, there seemed to be a bit more in Midlands and east thereof.

Temp rose to 15C behind cold front here in sunshine.

Len
Wembury, SW Devon

---------------------------------------------------------------------------

In message , Len
Wood writes
================================================= ===========================
That is pretty fast, cold frontal speeds vary of course, even along
their length.
But in my experience 10 to 15 m/s (22 to 33 mph) is typical.

Not much rain at a given location in the south due to its speed.
Only 1.2 mm here, there seemed to be a bit more in Midlands and east thereof.

Temp rose to 15C behind cold front here in sunshine.

Len
Wembury, SW Devon

---------------------------------------------------------------------------


Stupid question - sorry. How is the front speed calculated please ?
--


Jim

Sulby Glen

On Friday, 29 May 2015 23:56:26 UTC+1, Jim Kewley wrote:
In message , Len
Wood writes
================================================= ===========================
That is pretty fast, cold frontal speeds vary of course, even along
their length.
But in my experience 10 to 15 m/s (22 to 33 mph) is typical.

Not much rain at a given location in the south due to its speed.
Only 1.2 mm here, there seemed to be a bit more in Midlands and east thereof.

Temp rose to 15C behind cold front here in sunshine.

Len
Wembury, SW Devon

---------------------------------------------------------------------------


Stupid question - sorry. How is the front speed calculated please ?
--


Jim

Sulby Glen

Not so much calculated as observed from its passage through places say 100 miles apart in the direction of travel. Not all cold fronts have a well-defined time of passage, unfortunately.

Tudor Hughes, Warlingham, Surrey.

In message ,
Tudor Hughes writes

Stupid question - sorry. How is the front speed calculated please ?
--


Jim

Sulby Glen

Not so much calculated as observed from its passage through places
say 100 miles apart in the direction of travel. Not all cold fronts
have a well-defined time of passage, unfortunately.

Tudor Hughes, Warlingham, Surrey.

Thanks Tudor, it's old fashioned observation and not some nifty maths.

--


Jim