Monday, November 22, 2010

22 November, 2010

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

LIVE NEWS FEED....
CHICAGO IS CURRENTLY AT 66-DEGREES WHILST MINNEAPOLIS IS AT 27 DEGREES AND FEELING LIKE 17 DEGREES. FARGO, N.D. IS 12 DEGREES WHILST MINOT, ND. IS AT 6 DEGREES, BILLINGS, MT IS AT 1-DEGREE.. SEVERE WEATHER HIGHLY POSSIBLE OVER THE CHICAGOLAND AREA THROUGH LATE AFTERNOON AND EARLY EVENING!

BREAKING UK WEATHER NEWS
IF YOU THINK IT'S COLD NOW, YOU AIN'T SEEN NOTHING YET, COLDER AIR TO ARRIVE BY WEEK'S END, EVEN COLDER NEXT WEEK WHEN A LOT OF SNOW WILL COVER THE GROUND ACROSS THE UK!


New vehicles fight winter weather across South East
BBC Weather

Another Snowstorm to Strike the West
AccuWeather News

BBC Weather

Today's Weather across America
From AccuWeather & The Weather Channel


Watch for Thanksgiving Severe Weather
By Alex Sosnowski, Expert Senior Meteorologist

Freeze Coming to California Orange Groves
By Alex Sosnowski, Expert Senior Meteorologist

Icy Roads Wreak Havoc in the Upper Midwest
By Vickie Frantz, AccuWeather.com Staff Writer

Weather Could Be Deal Breaker for Black Friday Shoppers
By Heather Buchman, Meteorologist

Midweek Blizzard to Unfold From Dakotas to Michigan

By Meghan Evans, Meteorologist


Northeast Temperature Roller Coaster
By Kristina Pydynowski, Senior Meteorologist

Today's Forecast
Courtesy of The Weather Channel



Weather Talk
By Mark Vogan

Norway, Sweden and Finland filling up with FRIGID air! That's coming our way, will be here by upcoming weekend!
The air will become colder throughout THIS WEEK but by Friday and Saturday a fresh push of even COLDER air will arrive aboard strong upper-level winds. SNOW should spread across the UK east to west over the weekend and spread a substantial snowcover. Once this "base" is set, a stronger, more potent push of Arctic air should arrive in from Scandinavia on the heels of the snowfall by Monday (next week). Highs from Inverness to London looks likely to struggle to reach freezing and nights may tumble towards -10C in many inland locations and including cities like Inverness, Glasgow & Manchester!

As we commence the new workweek, here in Great Britain, it may feel chilly out there, especially with that NE wind blowing in off the North Sea but the real cold that is currently moving into far northern Scandinavia right now will continue treking it's way southwestwards. As the pool of Arctic air that was just days ago over the pole, one batch is dropping into northern Europe and another dropping down through western Canada and into the western US... As this air is transported southwards via strong upper-levels winds, the powerhouse northerly jets (one pushing Arctic air into Norway, Sweden and Finland, the other in Canada and the US) will effectively deeping the troughs that are either side of a major blocking ridge that continues to push warmer air into Greenland and Iceland. This push of warmth, energizes the jet as these two very different air masses collide. The larger the temperature contrast, the stronger the jet flows and thus the faster the air flow aloft.

The air we here in Britain are about to see is now currently spreading from Spitzbergen, north of Norway's mainland down into Norway and Sweden. As the coverage grows, so too will the door open for a stronger, deeper push of Arctic air to drop south and deepen the expanding trough over NW Europe.. This trough will spread out and towards us, allowing increasingly colder air to cross UK airspace by Friday onwards. The cold this week, will be the mere "tail-end" of the air Norway, Sweden and Finland will have over them by that time, bringing daytime highs to only -5 to -10C and lows which may push towards -30C or colder in interior areas. Then, by Monday, Tuesday and Wednesday as the "core of coldest air" spins around a polar vortex , a piece of this air will be propelled west, southwest over Britain and present us with a piece of this bitter air come Monday through Friday next week. Highs in the major inland UK cities from Inverness to Birmingham are very likely to struggle to see highs reach -2C and lows which push towards -8 to -10C.. These numbers should be achievable if there's an inch or two of snow on the ground which will help keep this air from loosing it's power.

ABOVE GRAPHIC: Last night's low's Courtesy of the University of Cologne
GRAPHIC ABOVE: Current ECMWF upper-level pattern
GRAPHIC ABOVE: ECMWF upper-level pattern for Wednesday

GRAPHIC ABOVE: ECMWF upper-level pattern for Friday


Extreme cold starting to bite hard, spreading east across Plains, but warmth ahead of the Arctic front!

Huge temperature spread across Midwest alone with a current reading of 66 at Chicago whilst it's a bitter 12 up in Fargo! Chicago may endure severe weather through the rest of this afternoon as a line of storms blossom along the thermal boundary which sits over them right now...




What's Reaching Today's Blogs?

Two Surges of Cold This Week
Joe Lundburg, AccuWeather

AccuWeather At The Movies
Jesse Ferrell, AccuWeather

 Very Serious Weather This Week. Snowstorms are in the Longer Range
Henry Margusity, AccuWeather

Thanksgiving Travel Menu
Elliot Abrams, AccuWeather

The Extremes of the Day

Today's US Extremes
Courtesy of AccuWeather

High: 90 degrees at Falfurrias, TX
Low: -20 degrees at Dunkirk, MT

Today's UK Extremes
Courtesy of the Met Office

High: 50 degrees (9.9C) at Murlough (Co Down)
Cold High: 39 degrees (3.9C) at Dalwhinnie (Highland)
Low: 28 degrees (-2.2C) at Altnaharra (Sutherland)

Today's Extremes here at my house

High: 43 degrees
Low: 38 degrees

TODAY'S COND
A generally cloudy, cool day with a brisk east, northeast wind...

Thanks for reading.
-Mark

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