Daily Report for 13th January 2017

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 0.6 °C (-1.8) 02:30 2.6 °C (+0.1) 11.4 °C (+9.0), 2011 -0.5 °C (-2.9), 2013
Maximum Temperature 5.2 °C (-1.8) 16:29 7.9 °C (+0.9) 13.3 °C (+6.3), 2011 0.6 °C (-6.4), 2010
Mean Temperature 2.6 °C (-1.8) 5.4 °C (+0.5) 12.1 °C, 2011 0.3 °C, 2010
Minimum Humidity 57% 15:59 69% 90%, 2011 57%, 2017
Maximum Humidity 80% 11:20 83% 98%, 2010 78%, 2013
Mean Humidity 70% 77% 95%, 2011 70%, 2017
Minimum Pressure 1000 hPa 00:21 1017 hPa 1031 hPa, 2012 999 hPa, 2010
Maximum Pressure 1016 hPa 23:28 1026 hPa 1033 hPa, 2012 1001 hPa, 2010
Mean Pressure 1007 hPa 1021 hPa 1032 hPa, 2012 1000 hPa, 2010
Mean Wind Speed 8.9 mph (+3.7) 4.6 mph (-0.6) 8.9 mph, 2017 2.9 mph, 2012
Maximum Wind Speed 19.8 mph 11:00 12.3 mph 21.3 mph, 2015 7.6 mph, 2012
Maximum Gust 27.3 mph 09:26 18.1 mph 27.5 mph, 2014 10.2 mph, 2012
Mean Wind Direction NW
Rainfall / Snow-melt approx. 0.5 mm 34.8 mm (151%) 6.6 mm, 2015
Maximum Hourly Rain 0.5 mm 11:08 4.1 mm, 2015
Maximum 10-min Rain 0.3 mm 11:08 1.7 mm, 2015
Maximum Rain Rate 0.5 mm/h 11:08 42 mm/h, 2015
Minimum Dew Point -4.0 °C 08:25 -1.2 °C 10.5 °C, 2011 -4.4 °C, 2013
Maximum Dew Point -0.5 °C 12:24 4.3 °C 12.0 °C, 2011 -0.5 °C, 2017
Mean Dew Point -2.5 °C 1.6 °C 11.3 °C, 2011 -2.7 °C, 2013
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 0.6 °C 02:30 3.9 °C 11.4 °C, 2011 -0.4 °C, 2010
Day Maximum (09-21) 5.2 °C 16:29 7.9 °C 13.3 °C, 2011 0.6 °C, 2010
Max 10m Temp Rise 0.5 °C 11:50 0.3 °C 0.5 °C, 2017 0.1 °C, 2010
Max 1hr Temp Rise 2.1 °C 12:24 1.1 °C 2.1 °C, 2017 0.3 °C, 2010
Max 1hr Hum Rise 14% 10:57 4% 14%, 2017 2%, 2011
Max 10m Temp Fall 0.3 °C 17:46 0.5 °C 1.0 °C, 2014 0.1 °C, 2010
Max 1hr Temp Fall 1.0 °C 18:34 1.5 °C 2.1 °C, 2012 0.2 °C, 2010
Max 1hr Hum Fall 10% 12:31 6% 10%, 2017 1%, 2010
Max 10m Wind Speed 14.7 mph 11:35 9.3 mph 15.2 mph, 2015 5.6 mph, 2012
Minimum Feels-like -5.7 °C 11:00 -1.3 °C 12.8 °C, 2011 -5.7 °C, 2017
Maximum Feels-like 3.2 °C 15:19 7.5 °C 15.6 °C, 2011 0.6 °C, 2010
Mean Feels-like -2.1 °C 3.2 °C 14.0 °C, 2011 -2.1 °C, 2017
Air-frost Hrs 0 hrs 1 hrs 5 hrs, 2010 0 hrs, 2011
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 4.6 °C (-0.0) 5.4 °C (+0.8) 7.9 °C (+3.3), 2015 1.0 °C (-3.6), 2010
Humidity Range 23% 15% 29%, 2012 8%, 2011
Pressure Range 16 hPa 9 hPa 16 hPa, 2017 2 hPa, 2010
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 1 [14%]21 hrs (111%) [22%] 5.5 [75%], 2012 0 [0%], 2010
Wet Hours 1
[Mean rain rate: 0.5 mm/h]
42 hrs (148%) [13%] 9, 2010 , 2009
Cloud Cover Mostly Cloudy with periods of Partly Cloudy
Events Snowfall: ~0.5 cm
Lying Snow (at 09z): trace amount
Comments 10-11 Snow Showers; early traces of Snow on Heath
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Notes
Times of extremes are computed using the midpoint time of the extremum (if the value persisted for >1 minute).
Cumulative anomalies are reported according to the expected value for the month-to-date rather than month-end.
Sun hrs, Wet hrs, Cloud cover and Events are based on manual equipment/observations; their reliablity is questionable and they are provided for interest only.
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