Thursday, October 28, 2010

28 October, 2010

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3 Days to Go!
COMING THIS HALLOWEEN ( SUNDAY, OCT 31st)
MARK VOGAN'S OFFICIAL 2010-2011 UNITED KINGDOM AND EUROPE WINTER FORECAST.. are you ready?

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

Fall Fury Storm Notables
The Weather Channel
 

The image (above) may not look like much, but to a Meteorologist this said it all in regards to the energy coming into the Northwest to fuel "Fall Fury".

The circled area over southern Oregon, near Medford, indicates wind speeds at the level of the jet stream of near 220 mph on Monday morning.

It's this fist of jet stream energy which helped to crank up an intense low-pressure system over the Midwest on Tuesday.

From extreme low pressure to severe storms, high winds and snow, this storm had it all.

Pressure: How low can you go?


The surface map above from around 4 pm on Tuesday shows low pressure over northern Minnesota with many lines surrounding it known as isobars. Without getting into too much detail, these are constant lines of atmospheric pressure.

A large number of isobars, as pictured above, indicate an intense low helping to fuel high winds hundreds of miles away from the center.

In Big Fork, Minnesota, the pressure dropped to an incredible 955.2 mb or 28.21 inches. For perspective, a healthy low-pressure system in the winter may be in upper 970mb to 990 mb range.

According to the National Weather Service, if this pressure is verified it would go down as the lowest ever recorded on the mainland U.S. from a non-tropical storm.

Watch Expert Video: Find out how the pressure got so low

This pressure is also lower than these three famous storms:

- The "Cleveland Superbomb" in January of 1978.

- The "Storm of the Century" in March of 1993

- The "Witch of November" in 1975 which sank the Edmund Fitzgerald

Low pressure records were also set in the state of Wisconsin and in Chicago.

AccuWeather.com Europe Winter Forecast for 2010-2011
AccuWeather News

Today's Weather across America
From AccuWeather


Midwest Freeze Thursday Night
AccuWeather

Weather Talk
By Mark Vogan

Coldest Morning of Season across many areas of American West & N. Plains with Bodie State Park, Calif recording the first 0-degree low, a sure sign of things to come!


A HOT day across the South with 94 degrees at Houston whilst a beautifully warm day for Northeast with 72 degrees all the way to Boston, 69 degrees as far up as Burlington, Vt


It always amazes me at how a major storm system can not only bring amazing "direct" impacts in the form of wind, rain, snow, severe weather etc, but when looking at the larger weather map, you almost always get a stunning contrast and array of temperatures. Whether it be March or April or indeed October, there are always 1) a large contrast between warmest high and coldest high in the nation, just look at the map above, note the well below normal, 32 degree high at Bismarck, ND, then look down to Houston, TX, they topped a much warmer than normal 94 degrees, then of course just a degree warmer, Del Rio, TX to the west of Houston on the Texas-Mexico border topped a toasty 95 degrees for a national high for the day! 2) I always love the sharp flip in temperature, when you get a strong cold front (particularly in March over recent years) areas, especially in the Plains where temperature may be in the 70s, 80s or in extreme cases, the 90s and within a few hours, the bottom drops out, the front has passed and it's all of a sudeen dropping through the 50s, 40s, even 30s and yes, quite often the snows will fly!

Just last March there, Oklahoma City saw a day top 72 degrees, the following day it didn't get above freezing and it snowed heavily! This is a classic example of a powerful cold front swinging through.

3) I also love the sharp temperature contrast between two places that may be only 100 miles or less apart. I believe the Plains, again likely take the cake for this and I've seen a few examples of 20s in one corner of say Kansas and in the other corner, it's at least in the 70s!

What's Reaching Today's Blogs?

Historic hype. Historic storm?
Stu Ostro, TWC

1,000 Storm Reports, Record October Tornadoes
Jesse Ferrell, AccuWeather

Today's Extremes here at my house

High: 50 degrees
Low: 44 degrees

Thanks for reading.
-Mark


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