>NOVEMBER THOUGHTS: Unsettled, Mild Pattern setting up for much of Western Europe and the United States.

Written by on October 25, 2009 in Rest of Europe with 0 Comments

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Increased precipitation for United States and central Europe as the Atlantic and Pacific jet pops storms on it’s flow pump into the West Coast of North America and Europe as the cold collects and Charges up over the North Pole.


Atlantic and Pacific Storms to intensify and punch harder to ocean facing coastlines as warm-cold contrast grows over the Northern Hemisphere and the predominantly zonal jet streams increase in speed as fuel increases thanks to a “POSITIVE” ARCTIC AND NORTH ATLANTIC OSCILLATION..


LIGHT, MODERATE TO HEAVY SNOWS WILL CATCH AND BURY HIGH-ELEVATION MOUNTAIN RANGES BUT THE WIND AND RAIN MACHINE TO BE THE HEADLINER FOR NOVEMBER!


It’s now getting dark here as street lights are on and now with the clocks back as of 2am this morning we have not only lack of light but a true wintry look now outside with many trees now bare and the ones that fight to hold on to summer are thinning out, half nacked!

We have endured yet another passing Atlantic depression and winds have lightened up and torrential downpours are becoming fewer and less frequent as the isobars spread out as the windfield is stretched out as the center of low pressure heads further east, northeast across Denmark and Sweden..


It’s been a day of wind, rain and low clouds. Southern portions of Britain remained more sunny or partly sunny.


Same too for Amsterdam and Rotterdam, whom enjoy mild Atlantic air with the odd passing shower and a breeze blowing off the North Sea. The Netherlands have very similar weather to Britain and when the Arctic and North Atlantic Oscillations become positive like it is now, we have all the cold air that was once drained into the heart of Europe, portions of Asia and the United States all sucked back up to the pole and there, the Arctic air can reload. As the cold air up across the pole strengthens, the jet tightens and speeds up as it spins spins around the globe as the warm mid-latitude high’s pump heat north and the polar region begins to swell as the cold air builds and grows. As we see the tightening up of upper-level westerlies, storms form and grow as they cross the oceans of the Atlantic and Pacific and they slam into the classic regions of the Pacific Northwest/ British Columbia and UK-Ireland, France and Netherlands coastlines with gales to sometimes hurricane force winds and heavy rains as well as generate large swells across the seas..


We also see as these ocean-born lows hit and cross coastlines, as they cross interior sections of the continents and pull down chillier northern air as well as draw warm, sub-tropical air up from the south this not only allows deepening of the low pressure system but produces a mix of weather anywhere from thunderstorms, hail and unusual warmth as the warm air surges north with the warm front and excellerates just ahead of the approaching cold front, but as the cold front hits and winds shift, snow and ice can follow on the rear of the storm as the cold air is drawn down by it’s circulation. Often landlocked states, provinces and countries experience large and crippling snowstorms, but since they tap both mild and cold air as they progress speedily west to east with their attachment to the upper-level flow they often bring heavy snow to the mountains but heavy rain to the valley floors and a tendency to bring warm air into the equation, particularly across Britain and the coastal low countries of Denmark, Netherlands and Belgium with days which remain in the 50s thanks to cloud, wind and rain and nights that also remain in the 50s thanks to the warmer marine air as well as it’s associated cloud cover and mixing by the wind.

Even in January with the parade of powerful Atlantic storms in January 2007, we saw nightime lows that failed to drop below 50 to 55 degrees as the prevailing wind blows up from the sub-tropical southwest across Britain and the low countries of western Europe.


We shall see as the most recent low spins into southern Scandinavia we see a strong upper level flow blow surface winds out of the southwest keeping Belfast, Glasgow and much of central and southern England into 50 to 55 degree range overnight tonight but lightening winds and clearing skies particularly in the north may see lows drop into the 40 degree range with valley areas seeing 30s.


At the same time we here enjoy mild air despite the wet and gloomy skies, the Arctic is now recharging, allowing for nights under brilliant arctic high pressure and widespread snow and ice cover to drop towards 40 below zero in the territories north of the Arctic Circle. Lack of sunlight and the lack of urbanised heat, rivers, lakes and seas are freezing up as winter there hits hard when all the building of cold air is concentrated over the North Pole. This is making for bitter cold to pile-drive south when it comes the right time for the Arctic Oscillation and North Atlantic Oscillation to flip negative, creating a meridional jet pattern and the atmosphere will once again fight to equal balance. After the early October outbreak across the hemisphere, the return to positive may be nature or the atmosphere’s way to level or balance things out, it is doing so and once it finds equalibrium, things can react and the process begins all over again. Once the Arctic air build to much and the atmosphere over the Pole can no longer hols all the cold air, the snap to negative begins. In winter as the cold builds and the warmth is pushed back towards the equator, it is tougher for the atmosphere to find balance, it fights harder so that’s why we see all the storms and the increase in storms. In summer, the cold air shrinks and retreats north, therefore warmth can push and penetrate further north towards the pole, allowing for more stable, anticyclonic weather in areas well north such as the UK. When this happens, places nearer the pole, experiences what Britain experiences nearer or during winter.

Thanks for reading.

-Mark

Email me at superior37@hotmail.com

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