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Old October 20th 09, 12:24 PM posted to uk.sci.weather
Dawlish Dawlish is offline
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First recorded activity by Weather-Banter: Mar 2008
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Default Penzance - Blustery night.

On Oct 20, 11:55*am, Len Wood wrote:
On Oct 20, 11:08*am, Graham Easterling
wrote:





On 20 Oct, 10:21, Len Wood wrote:


On Oct 20, 9:08*am, Graham Easterling
wrote:


Windy last night, with gusts widely to 40mph in the far SW. Also mild,
with a minimum of11.8C.


14.2mm of rain overnight, but it cleared eastwards around 08:00 with
the cloud already starting to break. The overnight force 5-6 SE has
now become a Force 2-3 S just behind the front.


I see there's a heavy rain weather warning for Cornwall & the Isles of
Scilly from 10:00-15:00. It's been & gone here, and will have cleared
most of Cornwall by 10:00. *Heavy rain here was 04:00-07:00.


The warning was issued at 08:00 - shouldn't it be issue before rather
than after the event?


Graham
Penzance


Serious heavy rain here in Plymouth region at the moment 10.15,
Graham.http://www.metoffice.gov.uk/weather/uk/radar/
Was it a regional forecast?- Hide quoted text -


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Yes I know, the thing is the warning is fine for Devon, but for
Cornwall was affected from the early hours until 07:00 in the far west
to 10:30 (in the far east). So giving a warning from 10:00 was
incorrect. I've just returned from Mousehole, in sunshine. to speak to
my visitors who had just changed their plans for a walk, due to the
forecast. They've now set off in sunshine.


As MCC says, there was flooding in west Cornwall - well before the
period covered by the warning. In Penzance, along the prom due to the
sea overtopping (spring tide, low pressure, rough sea). I didn't see
any warning for coastal flooding.


Graham
Penzance- Hide quoted text -


- Show quoted text -


It does seem very silly being as the warning was issued at 0800.
I never understand why they don't look at the radar rainfall to give a
better indication of timing for frontal rain.
We are after all talking about nowcasting in such circumstances.



Len

Len- Hide quoted text -

- Show quoted text -


Nope that beats me too Len. I don't understand why the site directs
one to the Environment Agency and the Highways agency but not to the
rainfall radar, when the information you really need is when is it
going to rain and how heavy is it likely to be? The only place to find
that information is on the rainfall radar (OK, should be called the
precipitation radar, but that's a different matter!). It's an obvious
link and would be educational as well as informative as a nowcast.
Next freebie on the site should be nowcast radar, of course, as the
present radar is at least half-an-hour out of date. Easily done, not
expensive for the MetO and there would be a real opportunity for
involving the public more in the difficulties, but also the excitement
of forecasting.