In message , Jon O'Rourke
writes
"Graham Easterling" wrote in message
oups.com...
On 22 Jun, 18:52, John Hall wrote:

The weather warnings really have to be very specific to be of much
use.

Which at any more than an hour or two's notice (and that may be
optimistic) is unlikely to be possible with thundery downpours.
--

Yes, is it tricky, this is where I agree with Norman's view on
Nowcasts.

Since 2004 there has been a dedicated Nowcasting bench in the Operations
Centre that orchestrates the issue of Flash warnings in conjunction with the
Chief and Public Weather Service forecasters.

Jon.

But surely the art of nowcasting includes the issue of updated
information at very frequent intervals, say at least once an hour and
preferably more frequently, giving explicit detailed information on the
location and expected short-term evolution of individual storm cells.
Issuing broad-brush flash weather warnings and leaving them unaltered
for hours on end isn't nowcasting.

Norman.
(delete "thisbit" twice to e-mail)
--
Norman Lynagh Weather Consultancy
Chalfont St Giles 85m a.s.l.
England