WEATHER REVIEW - January 2014
Headline: A similar pattern to December 2013 – mild, windy and very wet. The wettest January locally since 1939.
January opened with a complex area of low pressure dominating the charts. The main centre of the low was located west of Ireland, but several weather fronts circulated about the central area, including discrete low pressure systems in their own right which often intensified to produce strong winds and spells of heavy rain. One of these moved up from the south-west on the 1st delivering 13.5mm of rain at Pitsford in 24 hours. In fact, this low pressure system remained in place for over a week giving some sizeable rainfall totals (8.6mm on the 3rd, 6.6mm on the 6th and over 5mm on the 4th and 8th). Most days saw wind speeds exceeded 30mph, and the 1st and 6th saw wind speeds reaching around 40mph. Apart from the 2nd, sunshine was in particular short supply. Although the main centre of the low started to move away to the north-east on the 7th into the 8th, another fast tracking low moved up from Biscay on the 8th into the 9th to give a last sting in the tail before a ridge built in from the west.
The ridge, which was relatively short-lived, brought clearer skies during the daytime, a consequence of which was some chilly nights and daytime temperatures which were slow to recover. Up until this point, hardly any air frosts had been recorded this winter at Pitsford, but following a particularly sunny day on the 11th and a clear night, temperatures fell to -1.4C on the morning of the 12th and again to -0.5C the following morning. It wasn’t completely dry during this period though. An occlusion worked south-eastwards on the 10th into the 11th introducing outbreaks of rain (1.3mm at Pitsford).
The ridge pulled away
eastwards late on the 12th with frontal systems introducing further spells of
rain. Conditions became increasingly cyclonic across the
The low began to fill gradually on the 16th, but conditions remained cyclonic over the next few days with weakening occlusions stagnating across the country. Mainly light showers were recorded across the county, separated by longer spells of sunshine and with wind speeds generally easing. It finally dried out on the 19th with a couple of fine and mostly sunny days. Clearer skies though led to a brief cold snap on the 20th into the 21st as temperatures dropped below freezing.
deepened south of
Analysis chart for midnight on 5th into 6th January revealing the large low pressure system which dominated the weather during the first week of January. In fact, for much of the month the picture was not dissimilar with one Atlantic low after another moving in across the country.
Air Temperatures The Highest Maximum: 12.2 C on 5th The Lowest Maximum: 4.3 C on 30th The Highest Minimum: 6.9 C on 7th The Lowest Minimum: -2.0 C on 21st The Mean Maximum: 8.5 C The Mean Minimum: 2.4 C The Overall Mean: 5.5 C Difference from the Monthly Mean: 0.8 C Solar Radiation Maximum (at 0900): 120.0 W/m^2 on 11th Mean (at 0900): 20.5 W/m^2 Relative Humidity: Highest Relative Humidity (at 0900): 100.0 % on 21st Lowest Relative Humidity (at 0900): 74.9 % on 3rd Mean Relative Humidity (at 0900): 92.8 % Dew Point: The Highest Dew Point (0900): 8.2 C on 15th The Lowest Dew Point (at 0900): -0.8 C on 20th The Mean Dew Point (at 0900): 3.6 C Rainfall: Total: 112.8 mm Percentage of the Monthly Mean: 203.9 % Duration: 95.1 hrs Highest 24 hour fall (0900 to 0900): 13.5 mm on 1st Rain Days (>/=0.2mm): 27 Wet Days (>/=1.0mm): 23 Sunshine: Total Duration of Bright Sunshine: 36.5 hrs Sunniest day: 3.5 hrs on 17th No. of days without sunshine: 11 Percentage of the Monthly Mean: 74.5 % Cloud cover (mean at 0900): 5.1 oktas 63.8 % Pressure (reduced to sea level): The Highest Pressure (at 0900): 1020.5 mb on 12th The Lowest Pressure (at 0900): 982.0 mb on 28th Mean Pressure (at 0900): 1001.4 mb Winds Run of wind (mean over 24 hrs): 167.0 miles Mean daily wind speed: 9.0 mph Run of wind (cumulative): 5177.6 miles Highest Maximum Gust: 60 mph on 25th No. of gusts of 50mph or more: 1 Highest wind strength (at 0900): 20.8 mph on 1st Mean wind strength (at 0900): 9.9 mph Winds from the Following Directions: N 0 NE 1 E 2 SE 9 S 12 SW 5 W 2 NW 0 Calm 0 Concrete Lowest Concrete Minimum: -4.0 C on 21st Mean Concrete Minimum: 2.1 C Evaporation Piche 38.3 ml Days with: Thunder: 1 Hail <5mm: 1 Hail >/=5mm: 0 Snow or snow & rain: 1 Snow lying: 0 Fog: 2 Air Frost: 4 Duration of Air Frost: 5.3hrs Gales: 0 All data © Pitsford School weather station.
Click here to view the weather diary for January 2014.
Click here to view the full AWS weather record for January 2014.
Click here to view the statistical summary for 2014.
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 School'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.