>27 December, 2010

Written by on December 27, 2010 in Rest of Europe with 0 Comments

>Today’s Top Weather Stories
On Weather & Climate Through the Eyes of Mark Vogan

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Mid-Atlantic & Northeast US Hammered by Boxing Day Blizzard

New Yorkers grumbled over massive mass transit delays and unpaved streets caused by the snowstorm that hit New York City Sunday and Monday…
Courtesy of New York Daily News

Transportation in Disarray After Blizzard Tapers Off

New York Times

Christmas Blizzard of 2010: Mayor Bloomberg defends NYC’s response to winter storm, mass transit

New York Daily News

Storm bids region goodbye; leaves behind power outages, coastline damage

Boston Globe

Blizzard postpones Eagles game, snarls Philadelphia travel

Philadelphia Inquirer

Bradley Beach NJ 30″ with 4-5 ft snow drifts..
Image Courtesy of AccuWeather Facebook Fan

NEW: 32 Inches of Snow: Boxing Day Blizzard Greatest Hits
JESSE FERRELL, ACCUWEATHER

The Weather Channel Coverage of the storm last night…

FROZEN BRITAIN COMMENCES IT’S THAW
Mild Atlantic Air winning fight with Cold Arctic air that has dominated an entire month, but despite warmer air, problems aren’t going away fast! -By Mark Vogan

This was the scene in my street this morning as rain and sleet which accummulated during the overnight on area roads, have created a sloppy, slushy mess. Pavements and Roads are very icy as moisture is freezing on the subfreezing surfaces.

As a frontal system transports mild, moist Atlantic air back across the UK, cold, stagnant air remains entrenched, lying stubbornly near the surface and this creates major problems with icing. As Atlantic air moves in, Arctic air remains directly over the ground and the warmer air floats overtop the cold air. This cold air tends to hang around longer with snowcovered ground and indeed the exceptionally cold temperatures within pavement and road surfaces as well as in the soils, it’s going to take longer for ice to melt. Warmer temperatures aloft means rain falls and despite colder air in the last few hundred feet in the lower atmosphere, this rainfall doesn’t change to snow and thus “freezing rain” becomes a problem as ground temperatures may still be -5C or colder, this icing gets worse even though temperartures may be even at head height of 5 or 7C above freezing.

Of course, further east across the UK, especially today to the east of the Pennines, the air remains cold enough for snow to fall and we may see upwards of 2-4 inches of snow down the eastern side of the UK as milder Atlantic air cools the further east and the deeper into the cold Arctic air it needs to penetrate, thus heavy snow is highly likely over the mountains and to the east of the Pennines of England as well as eastern and hilly areas of Scotland.

Even over western Scotland, Arctic air doesn’t just dissappear at the initial arrival of moist, warmer, maritime air. Last night saw rain change to sleet and wet snow and this created road travel issues early this morning with thick sleet accummulations, this turned wet, sloppy slush to ice underneath and made for very tricky, slick driving on roads as well as when having to walk on pavements.

Today’s Weather across America
From AccuWeather

Pattern Change Coming, Western Cold Shot, Snow
By Alex Sosnowski, Expert Senior Meteorologist

How Unusual was this Year’s Christmas Snow?
By Gina Cherundolo, AccuWeather.com Staff Writer

Frost Freeze to Hit Florida Penninsula Monday Night
By Alex Sosnowski, Expert Senior Meteorologist

Weather Talk
By Mark Vogan

PLYMOUTH TO REACH 10C, CARDIFF 8C AS WINDS BLOW STRAIGHT OFF THE ATLANTIC, COOLER THE FURTHER INLAND AND EAST YOU GO!,
BY NEW YEAR THERE MAY BE LITTLE SNOW COVERING LOW LYING BRITAIN, BUT ICE WILL BE SLOW TO CLEAR!

The more snow can be melted, the warmer the air will become…

Folks, unfortunately, due to both intensity and duration of this past cold period, the snow will take time dissappearing and even longer for the ice to do so as ground temperatures remain cold and will take longer than the air of course to warm. In fact, we may find colder weather returns BEFORE the ground really thaws out, that’s right it may remain frozen many feet below the surface for weeks, not days. However, the first foot or so below the surface should thaw out enough that heavy rains from Atlantic weather systems should be able to perculate into top soils and thus hopefully will result in less urban flooding. Indeed frozen ground over the next week or so will not be able to soak up rain water as well as snowmelt, thus standing water will lie on still concrete hard ice which will be maintained until after the New Year because the ground itself is acting like a refridgerator and helping keep the remaining ice patches on the ground.

You’ll likely notice when watching your evening weather forecast, that temperatures are warmer the further to the west of the Pennines and the closer you go towards the coast with highs topping 8-11C, whilst inland areas which remain snowcovered and particularly eastern areas remain cold or chilly as these warm Atlantic winds are blowing across frozen snowfields and indeed they loose their warmth as well as drive into residual cold air which sticks around over snowcover even though the actual Arctic air mass has crossed the North Sea into Europe.

As mentioned in the first line of today’s segment, the more snow can be melted, the less “cooled” those southwest Atlantic winds will be and therefore those 7s and 8s can be felt in such places as Manchester, Glasgow, Newcastle and Edinburgh. In saying that, eastern towns and cities may remain on the cooler side as easterly winds blow in off the North Sea in coming days and thus highs may have a tough time warming to 3-4C but if milder Atlantic air persists and continues eroding the snow and ice across the UK, we should see mild air cover the UK by New Years Day and perhaps into next week.

BBC National Forecast for this afternoon.

Vagaries of the Weather
India & Sub-Continental Asia Weather
By Rajesh Kapadia

96B has formed in the Bay. embedded in the easterly wave.

Now, a little deviation in the forecast. The system has formed, but the system is not expected to move up north, as first thought in Vagaries. It may cross over into the Arabian Sea thru T.N. and kerala and weaken, and ultimately fizzle out by the 31st.

Hence, a little change in the 28-30 forecast map, which has been put up on the Vagaries forecast page now.

And the W.D. is expected to precipitate rains/snow in the northern states from 29th. and the rains will then move into Nepal on the 31st. A special 31st. map has been put up.

No fog expected in Delhi till 31st Dec. as a result.

Please check forecast maps on Vagaries Forecast Pages and Mumbai Pages regularly.

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What’s Reaching Today’s Blogs?

32 Inches of Snow: Boxing Day Blizzard Greatest Hits
Jesse Ferrell, AccuWeather

Beyond the Blizzard
Joe Lundburg, AccuWeather

The Last Northeast Blizzard of 2010
Elliot Abrams, AccuWeather

The Extremes of the Day

Today’s US Extremes
Courtesy of AccuWeather

High: 75 degrees at Indio, CA
Low: -11 degrees at Farson, WY

Today’s UK Extremes
Courtesy of the Met Office

High: 52 degrees (11.1C) at Isles of Scilly
Cold High: 31 degrees (-0.3C) at Tain Range (Highland)
Low: 25 degrees (-3.9C) at Tain Range (Highland)

Today’s Extremes here at my house

High: 36 degrees
Low: 32 degrees

TODAY’S CONDITIONS
Snowcover:  A THIN COVERING REMAINS as well as patchy old snow, ice and slush…
Atlantic air continues to filter in, however after persistent light rain showers last night, temps fell away towards freezing and rain turned to sleet which resulted in sleet accummulating on roads and pavements. Ice also began forming on frozen ground and this layed to very treacherous driving conditions as well as for walking.

Thanks for reading.
-Mark

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