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Old January 14th 12, 08:47 PM posted to uk.sci.weather
Dave Cornwell[_4_] Dave Cornwell[_4_] is offline
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First recorded activity by Weather-Banter: Nov 2010
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Default A short-lived colder spell, then back to milder and zonal again?

Dawlish wrote:
On Jan 14, 7:52 pm, Dave Cornwell wrote:
Dawlish wrote:
On Jan 14, 4:57 pm, Dawlish wrote:
On Jan 14, 12:02 pm, Dawlish wrote:
The gfs ensembles have suggested this for 24 hours now and there are
fewer colder scenarios after 10 days, in the 06z ensembles:
http://www.jp2webdesign.co.uk/two/ensembles/
The gfs operational has shown it for 3 runs and the ECM was suggesting
the same on the 00z at 10 days. If the gfs continues in the same theme
and is supported by the ECM, I may forecast a return to zonal at T240.
I'm not certain yet and my criteria for forecasting have not yet been
satisfied, but ATM, that seems the most likely outcome.
Like the last 3 days, there is still nothing in the models that
suggests confidence enough for a forecast that is likely to be
accurate.
12z gfs continues the theme.
ECM 12z hangs onto its colder theme by its bootstraps. I think it will
probably be gone tomorrow, but my confidence in zonal conditions
returning still hovers below 80%

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I had to smile when I read this after the criticism of Will's "Holding
his nerve".
Not quite sure about the confidence limits of "hovering below 80%"

Dave



It's always good to smile.

I don't quite know what you mean though Dave.

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Well as you've asked, "hovering below" a specific value isn't a
particularly well defined statistical term. I would imagine 10% could
hover below 80%. It was a wry observation that if you are worried about
others' semantics then in this instance yours might have been better.
Dave