FNRttC Friday Night Ride to the Coast Emsworth 20th April

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srw

It's a bit more complicated than that...
Other way round.

Think of a dartboard. If you hit 3 treble fives you are precise, but inaccurate because you were trying to hit treble twenty.
The met office should give up very precise weather predictions because forecasts do not have the requisite level of accuracy.
My turn to be pedantic. You were interpreting the met office report as precise ("it is raining right now exactly where I am"). It was in fact accurate ("In the Bristol area we currently have reports of rain.")

I agree that the met office, in its forecast, is guilty of over-precision. But that's because people don't understand the Fundamental Fact of Modelling: All models are wrong. But some are useful.
 

GrumpyGregry

Here for rides.
I'm out anyway, because the horrible virus that leads to sinuses and lungs full of green gunk came back with a vengeance after last weekend's Amersham ride, so I'm feeling horrible and haven't been on the bike all week :sad:. Have a great time everybody!

(Given the lightning damage to Southern Railways last night I might not have made it to Victoria in any case.)

That sounds awful I think I'd rather get all bent out of shape in a bike crash than have a green gunk episode.

trains appear to be running normally at the moment.
 
U

User482

Guest
My turn to be pedantic. You were interpreting the met office report as precise ("it is raining right now exactly where I am"). It was in fact accurate ("In the Bristol area we currently have reports of rain.")

I agree that the met office, in its forecast, is guilty of over-precision. But that's because people don't understand the Fundamental Fact of Modelling: All models are wrong. But some are useful.

I'm not interpreting anything: the Met office forecast predicted rain in Bristol at 3pm. At 3pm, there was bright sunshine, though it started raining later on. They were precise, but inaccurate.

Had they said "rain showers in Bristol in the afternoon" they would have been quite correct, with a reduced level of precision that better reflected the accuracy of their forecasting model.
 

srw

It's a bit more complicated than that...
The Met Office also say it's raining in Bristol right now...
I'm not interpreting anything: the Met office forecast predicted rain in Bristol at 3pm.
Ahem. There's a difference between a report ("right now", at 2:34p,) and a forecast ("at 3:00pm").

(What do you call a pair of pedants? A bi-stickler. God, that was forced.)

See you this evening.
 
U

User482

Guest
Ahem. There's a difference between a report ("right now", at 2:34p,) and a forecast ("at 3:00pm").

(What do you call a pair of pedants? A bi-stickler. God, that was forced.)

See you this evening.

My statements were not mutually exclusive...

I'm sure everyone is looking forward to the conversation over breakfast!
 

StuAff

Silencing his legs regularly
Location
Portsmouth
How big is the place where we'll be having breakfast? Will I be able to get out of earshot? :rolleyes:
Well, I know somewhere I can get breakfast ten miles out of earshot. That should do :smile:
 
OP
OP
dellzeqq

dellzeqq

pre-talced and mighty
Location
SW2
How big is the place where we'll be having breakfast? Will I be able to get out of earshot? :rolleyes:
fear not - the harbour is right next door. We'll borrow a boat, and people can dispute the nature of pedantry as they drift out to sea.....
 

TimO

Guru
Location
London
Well I looked at lots of forecasts on lots of sites, and calculated a high probability of lots of rain ...

A lot of the free (or relatively cheap) websites which "do" forecasting, use the same US computer model, which is freely available, but has a rather coarse physical resolution (iirc 75km). This probably doesn't matter as much in a large country, but I suspect that the UK websites probably interpolate the data to get a finer resolution, which isn't going to be very accurate. The US model is also reckoned to be very poor beyond 7 days (although that's not really an issue with tonight!). The main reason that people use it, is that it's cost free, whereas most of the other people who could provide useful information for the UK, cost money (probably quite significant amounts of money).

I think Simon does pay to get the more detailed forecast information from the Met Office.

The current forecasts seem to have moved the slight rain forecast for today, to slightly earlier than it was being forecast yesterday, and a bit less of it (not that it was forecasting much more than drizzle anyway). I'm going to have to make a quick decision on how wet the roads are going to be, and whether it'll be worth putting RaceBlades on Red, but my current thinking is that the roads will probably be dry, or very near to it, so I'm not expecting to need to bother with any more fettling.

... (Given the lightning damage to Southern Railways last night I might not have made it to Victoria in any case.)

I believe that's all mostly cleared up now. I think there was some problems early on, probably primarily through rolling stock not being in the right places, but I would guess by this evening it'll have been cleared up entirely.

I plonked all of the lights and batteries on charge before I left for work, with seven chargers plugged in!
 

mangaman

Guest
Sorry to butt in and depress people, but I'm in Chichester now with a thunderstorm going on at the moment with a downpour - hopefully should be a quick one but a lot of rain for a while.

Hope all goes well later.
 
OP
OP
dellzeqq

dellzeqq

pre-talced and mighty
Location
SW2
Sorry to butt in and depress people, but I'm in Chichester now with a thunderstorm going on at the moment with a downpour - hopefully should be a quick one but a lot of rain for a while.

Hope all goes well later.
you're depressing no one. It will come north and clear London by the time we start!
 
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