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Showing posts with label uk winter weather 2011. Show all posts
Showing posts with label uk winter weather 2011. Show all posts

Thursday, December 1, 2011

1st December - The Meteorological Winter Starts Today 2011-12

1st December 2011

As we officially begin the meteorological winter today, I thought it would be a good opportunity to review the colourful headlines that have been floating around in the media over the past few months.
  1. Many of you have sent this one to my inbox and asked for my opinion. No new Big Freeze, says Met Office (24th November 2011)


    The headline above bears no relation to the kind of weather that I am currently expecting this winter, as I will explain below.

    1. Another headline that probably caught most peoples attention

    The headline read: BRITAIN FACES AN EARLY BIG FREEZE, SNOW ON THE WAY NEXT MONTH SAY FORECASTERS (20th September 2011)

    The quote used from the Exacta Weather website within the article said: “I expect to see the first signs of some moderate to heavy snowfalls as early as October or November in CERTAIN parts of the UK.”

    As I explained in the update on the 30th October 2011 below, we did see some moderate to heavy snow in CERTAIN parts of the UK in October (Scotland and Northern Ireland – see pics below). It is certainly not unusual to see heavy snow in the Cairngorms in October, and this is why I included this within my autumn forecast. It is however unusual to see snow in Northern Ireland in October, as they recorded their earliest snowfall in nearly 50 years.

    No mention of WIDESPREAD heavy snow in October. (Please feel free to check any of my forecasts that are freely available within the archives section of Exacta Weather)

    1. Another headline that also probably caught peoples attention

      The headline read: Big Siberian Freeze to hit Britain, it will be here in weeks (2nd November 2011)

      The quote used from the Exacta Weather website within the article said: James Madden, of Exacta Weather, warned the theme of this winter would be “very cold and snowy across many parts of the UK”. He said there would be “frequent and widespread heavy snowfalls during November to January across many parts of the UK and Ireland, with below-average temperatures”.

      No mention of SIBERIAN temperatures in weeks. (Please feel free to check any of my forecasts that are freely available to view within the archives section of Exacta Weather).

      Although we have not experienced the below-average temperatures and the snowfall has not been extensively widespread for November, I did explain in a prompt update on the 8th November 2011 that there was a delay in some of these pattern changes, until the final third of November and much of December. My long term forecast for the winter in meteorological terms runs from 1st December 2011 until the last day of February 2012, just as my correct summer forecast run from the 1st June until the last day of August 2011, as this is the meteorological summer. (Both summer and winter forecasts were issued at the same time by myself earlier this year).

      December

      The recent newspaper headline above (24th November 2011) bears no relation to the kind of weather that I am currently expecting this winter, although it is important to remember that last December was the coldest in 100 years and one of the coldest months ever recorded in the UK. As in my last update on the 24th November, I fully expect December as a whole to feature below-average temperatures, with some widespread and deep snow accumulations across many parts of the UK and Ireland, that will continue into January and February. As in many of my updates since earlier this year, the regions I expect to be worst hit throughout this winter and December are many northern regions, Scotland, and parts of Ireland. This does not mean that the south will not see any snowfall, as I have stated that I do expect widespread and heavy snowfalls across many parts of the UK at times throughout this winter, which does include December. I have also stated that there will also be some periods of moderation at times, and any areas further south are most likely to see the best of these conditions.

      This Weekend/Next Week

      Many parts of Scotland will see snow become more heavy and widespread as we progress into this weekend and next week. Parts of Northern England and Ireland are also likely to experience some moderate to heavy snow showers as we head into the latter part of the weekend and next week, with the increasing possibility of some snow to other parts of the country too.

      Here is what I originally forecast on the 8th November 2011

      This does not mean immediate snow and cold by any means, but it certainly improves the outlook for frequent cold and above normal snow across many parts of the UK, as we head into the final third of November and much of December. Some of these pattern changes are slightly later than anticipated, and even though it is difficult to believe with the unseasonably mild weather we have been experiencing (which I underestimated), I have very high confidence that we will shortly be entering a gradual cooling trend, that will bring frequent cold and widespread heavy snowfall across many parts of the UK”

      Here is what I originally forecast on the 24th November 2011

      Scotland will begin to see snowfall mainly across high ground as we head into this weekend. Snow will continue to affect Scotland and become more widespread within this region as we head into next week, with an increasing possibility of snow to lower parts of the UK and Ireland, as we head into the final few days of November and the first third of December”

      Any further updates will be posted accordingly, along with my outlook for January at a later date.

      James Madden (UK Long Range Forecaster)
      http://www.exactaweather.com/UK_Long_Range_Forecast.html

      Published: 1st December 2011 (17:29) GMT
      Content copyright © 2010-2011. Exacta Weather. All rights reserved.

Thursday, November 24, 2011

UK Winter Update 2011-2012

24th November 2011 - Update

As in my last update on the 8th November, I stated that I was expecting some pattern changes that was slightly later than anticipated, as we head into the final third of November and most of December. The pattern that we have experienced for November to date, is not the pattern I am expecting for the meteorological winter of 2011-12 (December, January, February). I am however expecting a significant pattern change, that will result in a dominantly negative North Atlantic Oscillation (NAO) and Arctic Oscillation (AO) for the majority of the upcoming winter.

When I first issued my summer and winter forecast on Exacta Weather in late January/Youtube in early February, I stated that I had high confidence that the meteorological summer (June, July, August) was likely to be below-average in terms of temperature, with largely above average rainfall, based on the parameters I consider within my personal long range forecasting techniques.

The UK summer rainfall was 18% above normal according to Met Office statistics


All three months also came in below-average (June, July, August) in terms of Central England Temperature (the oldest temperature dataset in the world – over 350 years old) and as I originally forecast. This factor/correct forecast also has an important bearing on my winter forecast (December, January, February) that was also issued at the same time as my summer forecast earlier this year.

June -0.4C

July -0.8C

August -0.4C


As I have stated many times throughout this year, I am expecting a more sustained blocking pattern in comparison to last year, that will bring frequent cold and above normal snow to many parts of the UK and Ireland this winter. It is therefore a logical conclusion that snowfall or temperature records could be broken within this defined time frame, or for the winter as a whole. I still expect many northern regions, Scotland, and parts of Ireland to experience the worst of these conditions.

Scotland will begin to see snowfall mainly across high ground as we head into this weekend. Snow will continue to affect Scotland and become more widespread within this region as we head into next week, with an increasing possibility of snow to lower parts of the UK and Ireland, as we head into the final few days of November and the first third of December. The remainder of December as a whole is likely to feature largely below-average temperatures, with some deep and widespread snow accumulations across many parts of the UK and Ireland, that will continue into January and February. Any required updates will be posted accordingly.

James Madden (UK Long Range Forecaster)

ExactaWeather.com

Published: 24th November 2011 (09:37) GMT
Content copyright © 2010-2011. Exacta Weather. All rights reserved.

Monday, October 31, 2011

UK Winter Forecast 2011-12 (Final Outlook)

UK Winter Forecast 2011-12 (Final Outlook)


http://www.exactaweather.com/UK_Long_Range_Forecast.html

Some major indifferences amongst many forecasters about what this winter has in store for us at present.

The 2010/11 UK winter mean temperature (December, January, February) was -1.3c below average, with widespread heavy snowfall throughout November and December across many parts of the UK, as I originally forecast. Although my winter forecast also held true in terms of a below average winter as a whole for temperature, February actually saw a return to much milder conditions, that recorded a mean Central England Temperature (CET) anomaly of +2.6c. I did state in my January update that the stage the La Niña had reached, may influence some much needed and welcomed weather, which I originally underestimated in some of my much earlier forecasts. Even though I did forecast the return of La Niña conditions for 2011/12 earlier on in the year, a key aspect that I emphasised strongly on, was that the La Niña would not be as strong this time around.

I have fairly high confidence at this stage, that we will experience a much more prolonged period of increased jet-stream blocking in comparison to last year. This will bring frequent and widespread heavy snowfalls during November to January across many parts of the UK and Ireland, with below-average temperatures for the meteorological winter of 2011/12 as a whole. Of course there will be some moderation at times with geographical variations, but the overall theme for this winter will be very cold and snowy across many parts of the UK and Ireland. This is a logical conclusion based on the parameters I consider within my forecasts, any snowfall or temperature records broken within this defined time frame (November to February) or for the winter as a whole will be posted accordingly.

Earlier forecasts that offer specific locations are based on a different set of parameters and historical data, and are intended as a general insight. As to how a weather pattern can actually unfold a few days before is somewhat different, and I certainly can't claim to have the technology or finances to monitor these short range situations, as well as other leading and well funded organisations. I can however make the best of the resources I have available to me, with the integration of the major natural factors that I have studied in depth and consider within my forecasting analysis, to offer a fairly reasonable and reliable account of the weather patterns that are likely to unfold for a defined time period (several months in advance) and just as I have done over the past few years. Further updates will therefore follow and become more location and date specific as we head into and progress through winter. Here is what I initially issued on Youtube on the 4th Feb 2011


Here is what I initially issued on 2nd September 2010 (last year)

I am currently predicting that the UK and Northern Europe will experience at the very least a winter similar to the last, or as I expect much worse with heavy snowfall. “This is my basis on the severity of the cold for this coming winter due to the lag effect that comes with some of these processes, which will in return drastically affect the summer and winter of the UK in 2011/12.”

Result (Winter 2010/11) = Coldest December in 100 years, widespread heavy snowfall in November and December, UK winter mean temperature was -1.3c below-average.

Result (Summer 2011) = Coldest UK summer in over two decades, largely above average rainfall in many places, torrential downpours and severe flooding events.

Result (Winter 2011/12) = PENDING...

October Snowfall

I stated on the 2nd September 2011 update

As we head towards winter, I expect to see the first signs of some moderate to heavy snowfalls as early as October or November in certain parts of the UK. In terms of the meteorological winter, I expect December, January, and February to experience below average temperatures, with the heaviest snowfalls occurring within the time frame of November to January across many parts of the UK.”

October 2011 has seen some moderate to heavy snowfall in CERTAIN parts of the UK. The first snow of the season came in early October in upland Scotland, and although snow is certainly not unusual in these parts of the UK during October, this is why I included this within my autumn forecast/winter update. Further heavier falls of snow and drifts was also recorded later on within the month in Scotland, with the earliest snowfall in almost 50 years in Co Derry, Northern Ireland.


CAIRNGORM MOUNTAIN STAFF - OCTOBER 2011



CO DERRY, NORTHERN IRELAND - OCTOBER 2011


Meteorological winter 2011/12

December 2011

Below average temperatures and heavy snowfall is likely across many parts of the UK.

January 2012

Below average temperatures and heavy snowfall is likely across many parts of the UK

February 2012

Below average temperatures and moderate to heavy snowfall is likely across parts of the UK

James Madden (UK Long Range Forecaster)

ExactaWeather.com

Published: 30th
October 2011 (23:27) GMTContent copyright © 2010-2011. Exacta Weather. All rights reserved.