>29 May, 2011

Written by on May 29, 2011 in Rest of Europe with 0 Comments

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

Memorial Day Weekend Severe Storm Threat

THE WEATHER CHANNEL

Remembering Joplin One Week Later
THE WEATHER CHANNEL

TODAY’S WEATHER ACROSS UK & EUROPE
By Mark Vogan

It’s been a Windy day across central Scotland!

Both videos I recorded from my bedroom window this afternoon.

Reason for such windy conditions today

If you notice from current European model that the isobars or lines of equal pressure are oriented west to east and their packed close together. When you see these lines close together, this suggests strong winds. Depending upon where their pointing, this suggests the direction in which the wind is blowing. The closer they are together, the stronger the winds blow.

So, what made these isobars get close together and bring a windy day across Scotland? If you notice in the above map, there is a strong upper level low pressure system positioned between Scotland and Iceland and to the south, below the isobars, there is a fairly strong high pressure system. When these two pressure systems get close to one another, winds blow. The winds blow in order for the atmosphere to find balance. It’s the atmosphere’s of finding balance.

European model continues to suggest summer warmth to cover Scotland by Thursday and last through weekend!

Here’s a quick video explaination to this week’s pattern interpretation from the ECMWF (European).

For Thursday

Next Friday
Next Saturday

TODAY’S WEATHER ACROSS AMERICA By Mark Vogan

From Central Plains to East Coast: It’s gonna be hot hot hot!

If you live pretty much anywhere that’s east of the Rockies, you’ll have noticed it’s become pretty warm. Well let me tell you, it’s going to get even warmer throughout at least the first half of the new workweek, if not ALL of the week. The reason for the high becoming so expansive, covering a very large area of the country is all thanks to the change in the seasonal pattern. We’re now seeing the atmosphere turn into a more summerlike pattern. However despite a trough and storm drilling into the Pacific Northwest and will continue to progress into the Great Basin and Rockies, this won’t weaken or destroy the high to the east, it’s going intensify it by forcing more blistering air that’s simmering across Mexico and Texas. Up until now, the pattern has been progressive, this week, we’ll see less progression and rather building of fair weather high pressure.

As you can see, the nation from the eastern Front Range to Eastern Seaboard is getting hot. What’s going to happen is that as the trough digs and pushes against the upper level high, it’s going to force ‘height rises’ and thus the 105-110 degree heat that’s focused upon Texas, well it will expand and will be shared. By ‘sharing’ this heat with the rest of the eastern third of the country, we’ll see 105s to 110s drop to around 95 to 100 but the coverage of 90s will spread all the way north to the Lower Lakes and southern New England, east and south.

WEATHER TALK
By Mark Vogan

Since 2006 when Chicago reached 99 degrees, every summer since then has seen a summer maximum of exactly 94 degrees, will this ‘cool, damp’ trend continue through summer 2011?

Chicago Skyline from South Lake Shore Drive (Courtesy of Wikipedia)

It hard’s to believe that 2007, 08, 09 and 10 have all seen an exact maximum of 94 degrees, recorded at Chicago’s O’Hare International Airport.

What I find interesting is that after the dry Midwest summers of 2005, peak high of 102 degrees and in 2006, peak high of 99 degrees, summers in the Midwest have been unusually wet and fairly cool.

So what’s the possible cause of this transition to wetter summers, it would appear to been a trend since this summer looks to be the 5th in a row that’s seen wet springs. Going by the past 4 summers, a wet spring, often is followed by a wet summer that produces sub-par temperatures? I believe it’s the cooling of the North Pacific. The Pacific Ocean plays a major role in whether Chicago and the Midwest sees wetter or drier than normal conditions over a prolonged period of time of say 6 or more months and certainly during cold phases of the Pacific Decadal Oscillation or PDO, we do tend to see more La Ninas rather than El Ninos. La Ninas are a result of colder than normal Equatorial Pacific waters which often produce a wetter, colder than normal winter and spring over the Midwest. This often feeds into summer and with abnormally wet spoils, summertime heat often forces moisture to rise from the ground up into the atmosphere resulting in more frequent than normal thunderstorms which feed the wet summer and keeps the temperature at bay.

It has been yet another wet spring and I wouldn’t be surprised if this was yet another summer in which Chicago has failed to reach 95 degrees.

VAGARIES OF THE WEATHER
INDIA & SUB-CONTINENTAL ASIA WEATHER
BY RAJESH KAPADIA

SWM remains weak in Sri Lanka:

SWM entered Southern Sri Lanka as a weak current (Vagaries’ report) on the 26th, and still remains weak. There was little rainfall in the Southern regions today (Sunday), with Kurunegala measuring 14 mms and Ratnapura getting 11 mms.

The attached sat. image from wundermap (Sunday evening 6.30 pm) shows the SWM still restricted to the Southern half. Anticipitated by Vagaries to cover the Island by the 29th, but seeing the conditions, the advance is not possible today.

Another sat image shows the Kerala region as on Sunday evening, 6.30 pm IST. I feel, (with ref. to IMD statement), the SWM is still 24/36 hrs away. The region had 2 days of pre-monsoon rain, as mentioned in our blog.

With regards to the Bay sector, the trough off the eastern coast is also weakening, and stationary, again, not allowing the SWM to advance further to cover the Bay Islands.


Vagaries’ northern limit map of SWM remains unchanged.

For Your Information:

-Thunderstorms reported on Sunday evening from interior Goa and Dandeli regions.

-Hailstorm with thunder in Dehradun on Sunday evening, continuing till last report at 6 p.m. Rainfall measured 22 mms.

-Belgaum also is also witnessing a thunderstorm this evening. Rainfall 27 mms.

More read from our partner blog HERE!

WHAT’S REACHING TODAY’S BLOGS?

Potential Storms Passing Just North Late Tonight?
PhillyWeather.net

THE EXTREMES OF THE DAY

TODAY’S US EXTREMES
COURTESY OF ACCUWEATHER

HIGH: 107 degrees at Laredo, TX
LOW: 13 degrees at Bodie State Park, CA

TODAY’S UK EXTREMES
COURTESY OF THE MET OFFICE

HIGH: 73 degrees (22.5C) at Charsfield (Suffolk)
LOW: 40 degrees (4.4C) at Loch Glascarnoch (Highland)

TODAY’S GLOBAL EXTREMES
COURTESY OF THE UNIVERSITY OF COLOGNE

HIGHEST

48C (118F) at Kiffa, Mauritinia (Africa)
47C (115F) at Sibbi, Pakistan (Asia)
44C (111F) at Torreon, Mexico (North America)

LOWEST

-77C (-107F) at Interior Antarctica
-33C (-27F) at Summit Camp, Greenland

TODAY’S EXTREMES HERE AT MY HOUSE

HIGH: 57 degrees
LOW: 46 degrees

Thanks for reading.
-Mark

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