WEATHER REVIEW - April 2011
Headline: Dry, sunny and very warm. The 23rd was the warmest April day on the local record.
The month began with
warm but changeable southwesterly winds. Amounts of rain were mostly small in
eastern and southern districts, but there was prolonged and sometimes heavy
rain over northern and western
With high pressure
now in charge, the warm weather lasted until the 11th and most parts of the
It became rather less warm on the 24th and 25th as winds swung round from the north with highest temperatures found along the south coast, and the 26th was a generally cloudy and rather cool day over the southern half of the country except along the south coast where some sites reported 12 consecutive days with 10hr or more bright sunshine between the 17th and 28th, and Southampton logged an aggregate of 143h sunshine during this spell. Across Northamptonshire sunshine amounts were rather varied. As the month came to a close, in common with many places, the county saw some fine sunny weather for the extended Bank Holiday weekend. Showers were forecast for the Royal Wedding (29th), but were confined to the overnight period. Despite the warmth during the sunshine, it did feel cold in the shade due to a brisk easterly breeze and overnight lows fell sharply.
Overall this was the
warmest April in
Air Temperatures The Highest Maximum: 26.0 C on 23rd The Lowest Maximum: 12.4 C on 13th The Highest Minimum: 11.2 C on 6th The Lowest Minimum: 2.2 C on 13th The Mean Maximum: 18.1 C The Mean Minimum: 7.2 C The Overall Mean: 12.7 C Difference from the Monthly Mean: +4.5 C Solar Radiation Maximum (at 0900): 611.0 W/m^2 on 27th Mean (at 0900): 338.7 W/m^2 Relative Humidity: Highest Relative Humidity (at 0900): 92.0 % on 3rd Lowest Relative Humidity (at 0900): 46.2 % on 25th Mean Relative Humidity (at 0900): 77.1 % Dew Point: The Highest Dew Point (0900): 14.1 C on 23rd The Lowest Dew Point (at 0900): 3.2 C on 12th The Mean Dew Point (at 0900): 8.2 C Rainfall: Total: 7.4 mm Percentage of the Monthly Mean: 16.4 % Duration: 6.2 hrs Highest 24 hour fall (0900 to 0900): 2.9 mm on 3rd Rain Days (>/=0.2mm): 6 Wet Days (>/=1.0mm): 3 Sunshine: Total Duration of Bright Sunshine: 201.5 hrs Sunniest day: 12.5 hrs on 8th No. of days without sunshine: 3 Percentage of the Monthly Mean: 132.3 % Cloud cover (mean at 0900): 4.2 oktas 52.5 % Pressure (reduced to sea level): The Highest Pressure (at 0900): 1030.8 mb on 12th The Lowest Pressure (at 0900): 1006.3 mb on 2nd Mean Pressure (at 0900): 1020.7 mb Winds Run of wind (mean over 24 hrs): 132.2 miles Mean daily wind speed: 7.2 mph Run of wind (cumulative): 3965.5 miles Highest Maximum Gust: 33 mph on 11th No. of gusts of 50mph or more: 0 Highest wind strength (at 0900): 20.8 mph on 2nd Mean wind strength (at 0900): 10.1 mph Winds from the Following Directions: N 5 NE 4 E 5 SE 2 S 5 SW 3 W 0 NW 6 Calm 0 Concrete Lowest Concrete Minimum: 2.0 C on 4th Mean Concrete Minimum: 7.0 C Evaporation Piche 93.6 ml Days with: Thunder: 1 Hail <5mm: 0 Hail >/=5mm: 0 Snow or snow & rain: 0 Snow lying: 0 Fog: 0 Air Frost: 0 Gales: 0 All data © Pitsford Hall weather station.
Click here to view the weather diary for April 2011.
Click here to view the full AWS weather record for April 2011.
Click here to view the statistical summary for 2011.
The weather station publishes a full Monthly Weather Report (ISSN 1741-4733) which is distributed to libraries across Northamptonshire. This report comprises a full UK weather diary, reports of extreme weather events across the county, statistics from Pitsford Hall's affiliated stations across the county as well as news from the weather station itself. Individuals may download this report for £2 or take out an annual subscription for the paper-based report for £25. Click here for further details.