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uk.sci.weather (UK Weather) (uk.sci.weather) For the discussion of daily weather events, chiefly affecting the UK and adjacent parts of Europe, both past and predicted. The discussion is open to all, but contributions on a practical scientific level are encouraged. |
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An historical perspective of the climate statistics
for Coventry during March 2011 Temperature Overall, March 2011 has been 0.4C warmer than average in Coventry, though by day, mean temperatures (11.4C) were 1.1C above the city’s 30- year climatological normal (1981-2010). With a mean monthly temperature of 7.2C, it has been the mildest March in Coventry since 2007 (7.8C). Even so, it was not especially warm at night, with the mean monthly minimum temperature (2.9C) 0.3C below average for the city in March. As a consequence of night time cooling, we recorded 19 grass frosts at Bablake, the highest ground frost incidence in Coventry since March 1995 (24). The warmest day of the month (25th) recorded a maximum temperature of 17.6C, making this the warmest day in Coventry since 2005 (19.3C). As a contrast, the maximum temperature only reached 3.9C on the 3rd March this year, making this the coldest March day in the city since 2006 (3.1C). Rainfall With just 7.4mm of rain, this has been the driest March in Coventry since 1961 (7.1mm). The March rainfall total is just 16% of that expected, and is the tenth month in the past year to record a rainfall deficit locally. In this time, Coventry’s rainfall total has been 17% below normal. With monthly rainfall records dating back to 1870 in Coventry, we find that only five March months have recorded less rainfall than March 2011 (1913, 1929, 1938, 1944 and 1961). It has also been the driest month at any time of year in Coventry since April 2001 (5.1mm). Looking further back, it is interesting to note that only 28 months have ever been drier than March 2011 at any time of year since 1870, 10 in spring, 7 in summer, 5 in autumn and 6 in winter. There was no rain in Coventry for 16 days between the 14th and the 29th March inclusive; this was the longest March dry spell in the city since 2003 (19 days). Sunshine Although the monthly sunshine total (149.6 hours) was 31% higher than Coventry’s 30-year average, this was still our dullest March since 2008 (139.0 hours). The sunniest day of the month (24th) recorded 11.0 hours of sunshine, making this the sunniest March day since 2003 (11.1 hours). Only three March months have included days with more than 11 hours of sunshine in Coventry since 1894 (1997, 2002 and 2003). Steve Jackson Bablake Weather Station Coventry CV1 4AU www.bablakeweather.co.uk |
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