Archives For February

2016-03-12_13-32-30

February 2016 weather statistics for Reigate, Surrey, England.

  • Tmax 13C
  • Tmin -3C
  • T Average 5.3C
  • Rainfall total (CoCoRaHs) 48.2mm
  • Sunshine 99.6hours
  • Average MSLP 1010mb
  • rain days 18

Feb CET 4.9C (anomaly +1.1C)

Mean UK temp 3.9C

Storm Henry opened February weather with inclement wet windy conditions for the far NW but no significant impact here in the SE.

Storm Imogen on the 8 Feb impacted Wales and the SE more with the highest gusts of the month exceeding 41mph here in Reigate, with a max gust of 81mph on the Needles, Isle of Wight.

2016-03-12_13-39-57

February was another mild winter month, though not on the scale of record breaking December 2015.  February UK average was 3.9C, the Central England temperature (CET) for Feb was 4.9C, an anomaly +1.1C above the long term average. Locally our February average was 5.3C showing that the SE was warmer than the rest of the UK.

February was the sunniest winter month with nearly 100 hours of sunshine, compared to 94 hours in January and a dull 80 hours in December.

2016-03-12_13-32-51

The mean 500mb heights for the month (above) shows a trough placed over the UK for much of February and an overall Atlantic flow bringing milder than average temperatures, mainly to the south and SE. The continent was even warmer with some anomalous temperatures exceeding 10C in E Europe and Russia.

Rainfall for February was about average for the month at 48.2mm, similar to the MetOffice official SE England precipitation figure of 49mm.

2016-03-12_17-33-40

Global mean temperatures turned out warm again for February, in fact 0.47C warmer than the previous record.

2016-02-01_11-10-14

stratospheric warming February 2016

A notable atmospheric event that went mostly unnoticed at the surface was a significant stratospheric warming in February (and March).  The sudden warming of temperatures high in the stratosphere, much anticipated by the weather community and long range forecasters as a key tool to forecast winter conditions in the Northern Hemisphere, came too late to cause much cold winter weather in Europe.  El Nino winters are often accompanied by Sudden Stratospheric Warmings (SSW) events in late winter.  Such events can cause cold weather in mid latitudes as pressure eventually rises in the troposphere some 2 weeks after a SSW.  The warming during an SSW is truly remarkable, with temperature rises exceeding 80C in a matter of days at 10hPa (30km), from -80C to +10C in some SSW events.

An SSW is like inflating a balloon in the high atmosphere, pressure is expected to propagate down and eventually rise in the lower atmosphere some weeks after an SSW. Importantly, the pressure rise often disrupts the zonal westerly flow of the jetstream.  This appears as negative anomalies on the zonal wind chart below (blue colours). Unfortunately for this winter, the SSW came too late for much significant winter cold to penetrate into Europe.  You can spot that the anomalous easterly winds only got going in March… too late for deep cold to push into Europe.

2016-03-12_14-03-38

The JMA snow charts below also show how February came out as an anomalously un-snowy period for much of Europe.

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http://www.metoffice.gov.uk/climate/uk/summaries/2016/february

 

2015-03-12_21-10-33

February 2015 Reigate weather summary

 

Weather statistics summary for Reigate during February 2015

Average temperature 3.9C (UK 3.5)

Tmax 10.8C 25/02

Tmin -3C 22/02

Total precipitation 59mm

max wind gust 32mph 06/02

February was around the long term average at 4C in Reigate.  The CET stood February at just 0.3C above the long term average.

After an intially cold start to the month the temperature rose.

Overall February came out around average temperature but note the much warmer continent.

2015-03-12_21-58-44

A notable cirrostratus halo occured around moon on 02 Feb and this accompanied by some brief excitement over a snow band moving south down the eastern side of the country.

This band delivered an insignificant snow flurry on 03 Feb, overnight, with  a cm or so of briefly lying snow that melted rapidly during the morning.

Models threatened easterly winds on occasion but this didn’t arise.  In any case Europe and the continent experienced a warmer than average month so the deep continental cold was not available.  In fact after another brief flirt with snow at the beginning of the month, the temperature climbed through the middle of the month with westerly influences with temperatures exceeding 10C overnight on occasions.

Rainfall 58mm was just a little below average and sunshine hours, at 90 hours, was about average.

 

 

 

MetOffice February summary

http://www.metoffice.gov.uk/climate/uk/summaries/2015/february

 

Quick stats summary for February and a medley of photos below…

Tmax 13.3c

Tmin -0.2c

Average temp 9.8c (5.9c 2013)

sunshine hours 101.7hours

Total rainfall  139.1mm (42mm 2013)

Strongest wind gust 43 mph

The sun rose for the first time over Svalbard, Arctic on Feb 15 after months of darkness.  Whilst the news from Reigate was not quite as dramatic, the weather in Surrey continued wet and stormy for much of the time.. check the sat pics below for the amazing run of spectacular low pressures that swept across the UK.

On the ground in Reigate this meant higher than average rainfall of nearly 140mm for the month, compared with 42mm last year.  February rainfall for the whole of SE England was 273% above average, so the Reigate total was not too far off that figure and highlights our generally sheltered location relative to other places in the region (i.e. the coast). Whilst not quite as bad as the Dec/Jan storms for Reigate, February wind gusts locally in the town peaked at over 40mph mid-month, and were considerably higher over the Downs (50mph+).

A notable feature of the month were big showers and occasional claps of thunder in cumulonimbus clouds (Cb) produced in unstable streams of polar maritime air often sweeping in behind occluded fronts.  These Cb shower clouds sometimes produced splendid rainbows and clearing skies at night, ideal for star gazing.  An unusual aurora (from solar coronal outburst) late in the month caused spectacular displays of the northern lights to be seen all over the UK.  In Reigate the aurora could be seen as a faint red glow away from the lights of London.  Although plainly less spectacular than the amazing aurora displays further north, this was nevertheless a special sight considering the rarity of such events.

http://www.surreymirror.co.uk/Excitement-Northern-Lights-seen-Surrey/story-20727615-detail/story.html


February 2013 weather in Reigate. Highest temp 11.6C; lowest temp -2.5C; rainfall total 42.6mm.

Also winter 2012-2013 summary available above too.

FULL update of RGS weather data available on the DATA page here!