Friday, January 14, 2011

14 January, 2011

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TODAY'S TOP WEATHER STORIES
On Weather & Climate Through the Eyes of Mark Vogan

See NEW stats of the extreme readings witnessed at my Lennoxtown house during the coldwave of 2010-11 below in the WEATHER TALK SEGMENT


More than 500 dead in Brazil flooding
CNN

Death toll rises above 500 in Brazil mudslides
USA Today

Flooded Australian River Finally Receding
AccuWeather

TODAY'S WEATHER ACROSS SCOTLAND, UK AND EUROPE
By Mark Vogan

Positive North Atlantic Oscillation heralds a Return to More Typical "Stormy and Mild" Weather Regime

After a negative NAO and thus bloocking over Greenland over the past 40-45 day period, we have seen the large-scale change to a more classic winter weather regime for our portion of the hemisphere with an active low pressure train returning to near Greenland and Iceland, into Britain. The strong Atlantic jet stream once again fires across the North Atlantic and into the UK, sending windy, wet Atlantic depressions across the country and also pulls warm sub-tropical Atlantic air in also, bringing that more tupical artificial winter warmth that has been dominant in our winters between particularly the late 1980s and intensifying during the early 90s as well as late 90s and early to mid 2000s, those periods saw a seemingly increased storm-activity, abnormally warm air thanks to the intense low pressure systems which drew very mild air in from the southwest. The stronger those winds blew out of the sub-tropics, the milder the air was, ecven across the Highlands of Scotland were some particularly mild winters saw very little snow indeed.

Tomorrow, though it's not going to be downright stormy across all of the UK, we will see windier, wetter weather as well as highs topping 11 to 13C from southwest England to Glasgow, perhaps even Perth! One to Two inches is likely across the west and mountainous areas of the UK which are exposed to the southwest windflow.
Laura Tobin Prsents the BBC National Forecast

Simon Kind Presents the BBC Europe Forecast

TODAY'S WEATHER ACROSS AMERICA
From AccuWeather


Year of Extremes, Strongest La Nina: What It Menas For Coming Months
AccuWeather

Weekend Snow From Clipper For Great Lakes, Northeast
AccuWeather


WEATHER TALK
By Mark Vogan

Yesterday's 48-degrees high is Warmest Here in 70 days! I have seen a stretch of 34 nights with only 2 staying above 32, 9 straight days below freezing and 5 nights at or below 9 degrees

Persistently clear skies, light winds and deep snowcover allowed maximum radiational cooling night after night!

Trees covered in hoar frost after a few days of fog!

Deep snowcover lay for weeks!

Yesterday's seemingly balmy high of 48 degrees (9C) was in fact the warmest high achieved since all the way back to November 5th, 2010 where a high reached 49 degrees. That is 70 days. This morning's low of 44 degrees also marks the warmest since November 5th, 2010 when a low was 46 degrees. Amazingly, this morning was also the first low in which the temperature failed to fall below 40 degrees since November 19th.

After compiling my data for my back garden site I have these results...

The snows first fell and accummulated back on November 28th, 2010 and lay permanently until December 28th, accummulating to a maximum depth of 8.5 inches after the first week where snows fell literally everyday and accummulated to an inch at a time. (Last winter saw a maximum depth of 6 inches). This indeed marks a full calender month where snow lay on the ground and beats last winter for duration of permanent snowcover of 3 weeks.

december 2011

The month of December 2011 saw 17 days which produced a high temperature of 32 degrees (0C) or lower and to date since the commencement of "meteorological winter began on Dec 1 through January 12, there has been 19 such days. For ALL of last winter (Dec 1 through Feb 28) there was a total of 17 days. When including the period from November 27th through January 12th, there has been 22 days of 32 degrees or lower, comfortably beating a seemingly amazing total last year. November of 2009 didn't produce any daytime highs at or below freezing.

The month of December 2011 saw a total of 26 nights where the low fell below 32 degrees with only 5 nights staying above! There was 23 such nights during December 2009 and only a mere 9 days which failed to reach 32 degrees back in 2009.

Not only was there 16 consecutive nights in which the temperature fell below freezing, beating last winter's longest such stretch by 2 nights, this isn't as impressive as when taking into account the period from November 24th through December 27th, that's 34 nights where incredibly only two nights stayed above freezing. Both of which saw 16 nights below freezing with the warmest being 29 degrees and coldest being 3 degrees (-16C), there was two nights of relief with lows on the 10th of 36 degrees (2C) and 33 degrees (1C) on the 11th, what followed was ironically another 16 nights of below freezing, the warmest being 32 degrees (0C) and the coldest being 8 degrees (-13C)

january 2011

For the first 12 days of January 2011, there was 2 days with a high temperature of 32 degrees or lower and 11 nights at or below 32 degrees.
When looking at the entire 50 day periof between November 24th and January 12th, only 7 nights have remained above freezing, making for a total of 44 nights at or below 32 degrees. To put into perspective, ALL of last winter (Dec 1-Feb 28), there was a total of 61 such nights, making it very possible to beat since there is still a solid month and a half of meteorological winter left. There has been 20 nights which has been 19 degrees or lower, 19 of which was in December. To put this in perspective, December 2009 saw only 2 and ALL of last winter, a mere SIX! 

THIS WINTER HAS SEEN EIGHT NIGHTS COLDER THAN LAST WINTER'S COLDEST LOW OF 12 DEGREES

Last winter's coldest low was 12 degrees (-11C). This winter has seen amazingly, 8 nights COLDER! In fact there was an incredible 5 nights of 9 degrees (-13C) or lower. Last winter's coldest daytime maximum was 19 degrees (-7C), Though the coldest daytime maximum of 20 degrees this winter is 1-degree warmer, the only other cold high was the few and far between, Christmas Eve high of 24 degrees (-4C). There has been 6 days where the daytime maximum was either 24 degrees or lower. The rest of last winter's 17 days at or below, all of them were around 27 degrees or warmer.

I believe the second half of the November 24 to January 12th cold wave was most impressive. During the second 16-night stretch below freezing (Dec 12th through 27th), 11 days remained below freezing of which 7 didn't reach 30 degrees, 4 days consecutively didn't get above 24 degrees!, 2 days saw 23-degree highs. There was a 9 consecutive below freezing stretch, from 17th through 25th. During this stretch 11 consecutive nights saw lows plummet to 19 degrees or lower, 7 consecutive nights to 14 degrees or lower and likely an unprecidented 3 consecutive nights at 9 degrees or lower.

WHAT'S REACHING TODAY'S BLOGS?

Rare Cold Wave, Ice in Northeast Mexico
Jesse Ferrell, AccuWeather

Update on Next Weeks Model Battle
Henry Margusity, AccuWeather

Eastern Snow and the Long Range Update
Brett Anderson, AccuWeather

THE EXTREMES OF THE DAY

TODAY'S US EXTREMES
COURTESY OF ACCUWEATHER

HIGH: 85 degrees at Torrance, CA
LOW: -9 degrees at Fryeburg, ME

TODAY'S UK EXTREMES
COURTESY OF MET OFFICE

HIGH: 55 degrees (13C) at Exeter Airport (Devon)
COLD HIGH: 42 degrees (5.5C) at Dalwhinnie (Highland)
LOW: 28 degrees (-2.5C) at Aboyne (Aberdeenshire)

TODAY'S EXTREMES HERE AT MY HOUSE

HIGH: 47 degrees
LOW: 44 degrees

Thanks for reading.
-Mark

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