Daily Report for 18th January 2013

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature -2.1 °C (-4.5) 10:43 2.4 °C (-0.0) 7.6 °C (+5.2), 2014 -3.3 °C (-5.7), 2017
Maximum Temperature 1.8 °C (-5.2) 00:08 6.3 °C (-0.7) 11.9 °C (+4.9), 2012 1.8 °C (-5.2), 2013
Mean Temperature -0.8 °C (-4.8) 4.4 °C (-0.4) 9.3 °C, 2012 -0.8 °C, 2013
Minimum Humidity 71% 01:36 80% 95%, 2010 50%, 2009
Maximum Humidity 90% 13:24 95% 98%, 2010 82%, 2017
Mean Humidity 83% 89% 98%, 2010 70%, 2017
Minimum Pressure 997 hPa 23:30 1016 hPa 1036 hPa, 2017 989 hPa, 2014
Maximum Pressure 1012 hPa 00:30 1023 hPa 1039 hPa, 2017 993 hPa, 2014
Mean Pressure 1003 hPa 1020 hPa 1038 hPa, 2017 990 hPa, 2014
Mean Wind Speed 6.5 mph (+1.3) 4.0 mph (-1.2) 6.5 mph, 2013 0.2 mph, 2017
Maximum Wind Speed 12.5 mph 07:00 10.6 mph 12.8 mph, 2014 3.8 mph, 2017
Maximum Gust 17.5 mph 13:09 14.9 mph 17.6 mph, 2012 5.2 mph, 2017
Mean Wind Direction SE
Rainfall / Snow-melt approx. 5.0 mm 16.4 mm (51%) 7.6 mm, 2011
Maximum Hourly Rain n/a 3, 2009
Maximum 10-min Rain n/a 1.1, 2011
Maximum Rain Rate n/a 10, 2011
Minimum Dew Point -5.0 °C 08:23 0.5 °C 4.8 °C, 2014 -6.8 °C, 2017
Maximum Dew Point -2.3 °C 23:25 4.8 °C 11.1 °C, 2012 -2.3 °C, 2013
Mean Dew Point -3.3 °C 2.7 °C 8.4 °C, 2012 -5.0 °C, 2017
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) * -1.7 °C * 08:40 3.1 °C 6.8 °C, 2014 -3.3 °C, 2017
Day Maximum (09-21) * -0.8 °C * 20:55 5.8 °C 11.9 °C, 2012 -0.8 °C, 2013
Max 10m Temp Rise 0.1 °C 11:07 0.3 °C 0.5 °C, 2017 0.1 °C, 2013
Max 1hr Temp Rise 0.4 °C 20:51 0.8 °C 1.8 °C, 2017 0.4 °C, 2013
Max 1hr Hum Rise 6% 09:57 4% 6%, 2013 2%, 2010
Max 10m Temp Fall 0.2 °C 08:15 0.2 °C 0.4 °C, 2017 0.1 °C, 2012
Max 1hr Temp Fall 0.9 °C 07:11 0.8 °C 1.5 °C, 2017 0.3 °C, 2012
Max 1hr Hum Fall 3% 15:59 5% 10%, 2011 0%, 2010
Max 10m Wind Speed 10.3 mph 07:49 7.9 mph 10.3 mph, 2013 2.7 mph, 2017
Minimum Feels-like -8.7 °C 13:09 -0.6 °C 4.7 °C, 2014 -8.7 °C, 2013
Maximum Feels-like -0.4 °C 00:24 6.2 °C 13.7 °C, 2012 -0.4 °C, 2013
Mean Feels-like -5.3 °C 2.9 °C 8.9 °C, 2012 -5.3 °C, 2013
Air-frost Hrs 18 hrs 4 hrs 18 hrs, 2013 0 hrs, 2010
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 3.9 °C (-0.7) 3.9 °C (-0.7) 7.3 °C (+2.7), 2017 2.2 °C (-2.4), 2014
Humidity Range 19% 15% 44%, 2009 3%, 2010
Pressure Range 15 hPa 7 hPa 15 hPa, 2013 1 hPa, 2010
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 0 [0%]20 hrs (75%) [15%] 7.5 [99%], 2017 0 [0%], 2012
Wet Hours 10
[Mean rain rate: 0.5 mm/h]
26 hrs (67%) [6%] 10, 2013 , 2009
Cloud Cover Overcast
Events Snowfall: ~5 cm
Air Frost
Comments 09- Light Snow (15- broken Slight)
Extra Comments Snow depth at 19z was approx. 4cm. Radar suggests approx 5mm.
Issues None known
Observer Absent? No
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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