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speyweather

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    Lowest min temperature winter 2014 - 2015 season

    in Spring Weather Discussion

    Posted

    Being reported in today's press that my -9.0c overnight 26/27 Dec is (for the time being at least) the coldest UK temperature of 2014. This certainly surprised me: Having kept records here since January 2001, this is the highest annual minimum recorded over that period, and the first year I haven't recorded a double figure minus. Indeed, prior to this month the previous low was just -6.1c. So despite it being the UK's lowest this year it represents an incredibly mild winter in The Highlands.

    Lowest min temperature winter 2014 - 2015 season

    in Spring Weather Discussion

    Posted

    I still find it strange how we didn't record such a temperature early in the year. Usually January, February and March record below that without much effort, and in most years you would half expect April to do so, too. It's hard to believe we are waiting until late December to scrape near -10C for the first time in the year.

    If things stay as they are, it will be the first time for here (going back to 2000) when the minimum temperature has failed to reach minus double figures..... that just might change tonight!

    Scotland - Weather Chat

    in Regional

    Posted · Edited by speyweather

    Looks set to be the third ice-day in a row of this winter. After an overnight low of -9.0c, the temperature started lifting around 3am. The early fog lifted and a brief spell of sun this afternoon provided that lovely winter scene of sunshine, snow and heavy frost. But 2014 looks like it's going to be our first winter (from 2000) when the low hasn't dipped into minus double figures..... (and I do believe they've had bit of a dusting south of the border... not sure though as I haven't had the news on!!)

    • Like 3

    Boxing Day Snow Event Thoughts And Reports.

    in Spring Weather Discussion

    Posted

    Winter tyres are very under estimated.

    Yes, winter tyres will transform your car. A 2-wheel drive car fitted with winter tyres will frequently leave 4x4s floundering. And they're not just recommended for snow or ice conditions either, but whenever the temperature drops to 8c. For me it's routine - with winter tyres fitted every October and stored again at the end of March. As stated - very under-estimated.

    • Like 1

    EU Regulations cause headache for myself and UK MET

    in Weather stations and equipment

    Posted · Edited by speyweather

    That's more to do with the sensor in the station. Although Davis list +/-0.5C, in reality it isn't:

     

    http://www.sensirion.com/fileadmin/user_upload/customers/sensirion/Dokumente/Humidity/Sensirion_Humidity_SHT1x_Datasheet_V5.pdf

     

    The Davis is the SHT11, so at 0C it could be as much as 1.2C out. I've replaced mine with a custom unit which uses the SHT15 sensor which is much more accurate. In typical UK temperatures its never going to be more than around 0.7C out at worst.

     

    I must have got lucky with my SHT15 though, as when checking with a calibration probe from work it was exactly correct at 0C, 10C and 20C. My standard SHT11 Davis sensor was +0.6C, +0.4C and +0.5C out for reference.

    Thanks for that, and very interesting too - a pity really that Davis, with such a sensor readily available, don't fit it in the first place.

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