Daily Report for 21st November 2009

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 9.2 °C (+4.8) 00:28 7.4 °C (+1.8) 11.7 °C (+7.3), 2017 0.0 °C (-4.4), 2015
Maximum Temperature 15.0 °C (+5.3) 12:45 12.4 °C (+1.9) 15.0 °C (+5.3), 2009 5.1 °C (-4.6), 2015
Mean Temperature 12.3 °C (+5.1) 9.8 °C (+1.9) 12.7 °C, 2017 2.9 °C, 2015
Minimum Humidity 81% 14:23 73% 96%, 2011 55%, 2015
Maximum Humidity 98% 05:03 95% 98%, 2009 80%, 2016
Mean Humidity 94% 87% 98%, 2011 69%, 2015
Minimum Pressure 1005 hPa 22:15 998 hPa 1014 hPa, 2011 985 hPa, 2016
Maximum Pressure 1020 hPa 00:46 1008 hPa 1023 hPa, 2014 994 hPa, 2016
Mean Pressure 1012 hPa 1003 hPa 1017 hPa, 2014 988 hPa, 2016
Mean Wind Speed 5.3 mph (+0.7) 5.4 mph (+0.8) 8.0 mph, 2017 2.0 mph, 2016
Maximum Wind Speed 12.7 mph 13.0 mph 20.4 mph, 2012 10.0 mph, 2011
Maximum Gust 18.7 mph 18:20 18.8 mph 35.1 mph, 2012 13.2 mph, 2011
Mean Wind Direction S
Rainfall 10.1 mm 81.0 mm (207%) 15.0 mm, 2016
Maximum Hourly Rain 4.4 mm 21:26 4.4 mm, 2009
Maximum 10-min Rain n/a 21:16 2.1, 2016
Maximum Rain Rate n/a 21:26 54, 2016
Minimum Dew Point 8.4 °C 00:28 5.4 °C 9.3 °C, 2017 -7.4 °C, 2015
Maximum Dew Point 13.2 °C 11:38 10.0 °C 13.2 °C, 2009 3.2 °C, 2018
Mean Dew Point 11.3 °C 7.6 °C 11.3 °C, 2009 -2.5 °C, 2015
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 9.2 °C 8.0 °C 11.7 °C, 2017 1.7 °C, 2015
Day Maximum (09-21) 15.0 °C 12.3 °C 15.0 °C, 2009 5.1 °C, 2015
Max 10m Temp Rise n/a 06:30 0.5 °C 0.6, 2015 0.1, 2010
Max 1hr Temp Rise n/a 06:36 1.1 °C 2.6, 2015 0.4, 2010
Max 1hr Hum Rise n/a 16:10 6% 8, 2013 1, 2011
Max 10m Temp Fall n/a 15:06 0.4 °C 1.1, 2012 0.2, 2010
Max 1hr Temp Fall n/a 16:10 1.0 °C 2.9, 2012 0.4, 2019
Max 1hr Hum Fall n/a 13:30 8% 15, 2015 2, 2014
Max 10m Wind Speed 9.4 mph 14:05 10.1 mph 15.7 mph, 2012 6.8 mph, 2011
Minimum Feels-like 9.8 °C 00:10 6.4 °C 12.9 °C, 2017 -4.3 °C, 2015
Maximum Feels-like 17.6 °C 12:45 14.4 °C 17.6 °C, 2009 3.0 °C, 2015
Mean Feels-like 14.2 °C 10.2 °C 14.2 °C, 2009 -1.0 °C, 2015
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 5.8 °C (+0.5) 5.0 °C (+0.1) 7.5 °C (+2.2), 2016 2.1 °C (-3.2), 2010
Humidity Range 17% 21% 38%, 2015 2%, 2011
Pressure Range 15 hPa 10 hPa 18 hPa, 2013 3 hPa, 2011
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 1 [13%]48 hrs (98%) [28%] 4.2 [55%], 2015 0 [0%], 2012
Wet Hours 6
[Mean rain rate: 1.7 mm/h]
58 hrs (132%) [12%] 10, 2016 0, 2010
Cloud Cover not available
Events None
Comments 15 Heavy Shower; 16-21 Moderate, 21-2130 Heavy Rain
Extra Comments
Issues ALL MONTH: Rainfall data is approximate and 10-min totals & rain rates are unavailable due to 5-min logging, but monthly sum is correct.
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 0.0 °C
Notes
Times of extremes are computed using the midpoint of the longest continuous period at that extreme value.
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 (entered with a delay of 1-10 days); their reliablity is questionable and they are provided for interest only.
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Daily Graph of Conditions

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