Re: Monday night - Woodford reports -7.7°C


"Dave Ludlow" <daveludlow@BiGSPAM~TRAPclara.co.uk> wrote in message
news:1o3qo19iogd6fblrddm0jj6u64qk243ll4@xxxxxxxxxx
> On Tue, 29 Nov 2005 23:36:53 +0100, "Colin Youngs"
> <colin.youngs@xxxxxxxxxx> wrote:
>
>>Dave Ludlow wrote in message ...
>>
>>:Hmmm... Woodford. The lowest temperature reported from Manchester A/P
>>:in the half hourly METARS was -4 deg C last night (guessing, minimum
>>:of perhaps -5 deg C) and the two places are only a few miles apart,
>>:with similar terrain. I assume that the difference in minima is
>>:explained by a more urban environment at Ringway/Manchester A/P and,
>>:perhaps, snow cover at or near Woodford?
>>
>>As you may imagine, I included the word "reports" deliberately as the
>>Woodford figure seems suspicious - being 2.8 deg. C below the next
>>coldest:
>>Redhill.
>>
> Thanks Colin, yes I did notice the air of suspicion implied by your
> subject line! ;)
>
> But I think it may be correct. The Manchester A/P METARS aren't too
> far away from Woodford's minimum temperature, when you allow for the
> more rural environment of Woodford, the proximity of nearby high
> ground to the East and SE (probably snow covered), the wind direction
> (S) and strength (light) from possibly snow covered countryside -
> perhaps more than at Ringway (Manchester A/P). Perhaps even a light
> katabatic wind from the South Pennine foothills? (I used to know that
> area quite well).
>
> The hourly obs. from Woodford (from Met Office website) support a -7.7
> deg C minimum too, starting at 00:00 and ending at 11:00 on the 29th:
>
> -7(FOG) -7 -6 -6 -4 -5 -6(FOG) -5 -5 -5 -4 0.
>
> It seems to me that an overnight inversion broke, shortly after
> 10:00GMT - and the hourly obs. do support the recorded minimum
> temperature. Very interesting. What do the experts think?
>
> --
> Dave

Dave,

As Digital Donkey says, Woodford had a lot of snow and I don't think that
minimum is suspicious at all. Here in Withington, a bit further up the A34,
we still have lying snow with the rain currently doing its best to get rid
of it, although the temperature is still only 2.6degC. We reached a minimum
of -4.6degC the night of Woodford's -7.7degC.

The snow suddenly stops after Fallowfield, a notable urban heat island
effect. Having said that, the canal in Castlefield is frozen solid once
again, more so than previously.

It sounds like it's throwing it down outside but it's all the snowmelt from
roofs etc. creating the noise.

Joe
--
Withington, Manchester 55m asl




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