Bomb cyclone

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Bomb cyclone

Postby HBS Guy » 05 Jan 2018, 09:05

Just when you thought the weather couldn't get any worse, The Washington Post hits us with "bomb cyclone." That's right: Forecasters suggest this "bomb" will make the U.S. East Coast unbearable for many.

How does a system reach bomb-cyclone status? Its atmospheric pressure must drop so rapidly — at least 24 millibars in 24 hours, according to the National Weather Service (NWS) — that it explodes in strength.

"This can happen when a cold air mass collides with a warm air mass, such as air over warm ocean waters. The formation of this rapidly strengthening weather system is a process called bombogenesis, which creates what is known as a bomb cyclone," the NWS said.


We certainly have the cold air, a lobe of Arctic air that headed south and east from the Arctic, bringing cold and snow.

Enter the polar vortex — a spinning mass of cold air that typically encircles the North Pole. When the system is strong, it treks around the North Pole in a relatively circular shape, bound on the south by the jet stream, according to David Roth, a forecaster for the NWS Weather Prediction Center in College Park, Maryland. "Since the [winter] solstice, the polar vortex has been weaker," Roth told Live Science, adding that "it looks like an amoeba right now." This planetary-scale phenomenon is partly driving the current winter storm and meteorological bomb. That's because the frigid Arctic air seeping from the vortex creates what meteorologists call troughs, or low-pressure areas.

The low-pressure system is moving near the Gulf Stream, which stays toasty all year. The temperature gradient between the two is amplifying the pressure drop, Roth said. Adding to this temperature difference is the orientation of the upper trough, or the low-pressure at about 30,000 to 40,000 feet (9,100 to 12,200 meters): This trough is negatively tilted (like a backward slant), which makes the system even stronger, Roth said.

During these bomb-cyclone events, winds can whip up fast, spinning toward the system's low-pressure center. Snow and blizzard conditions can follow, according to The Weather Channel.


Not going to be nice.

https://www.livescience.com/61316-bomb-cyclone-east-coast-forecast.html?utm_source=ls-newsletter&utm_medium=email&utm_campaign=20180104-ls
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Re: Bomb cyclone

Postby HBS Guy » 05 Jan 2018, 19:11

Winter Storm Grayson—which is currently sweeping up the East Coast—is no ordinary bomb cyclone. And yes, there are ordinary bomb cyclones: They happen about 10 times a year in the northern hemisphere, whenever central pressure drops 24 millibars or more in 24 hours. But this storm is something else: A triple threat of tropical moisture, a low pressure trough in the upper atmosphere, and subzero arctic air that has escaped from the North Pole. “This storm is a synoptic meteorologist’s dream,” says Paul Huttner, who watches the weather for Minnesota Public Radio. “It’s a perfect alignment of the three things we look for.”

But, as science writer Megan Molteni explains, there might be a much larger force at work here too—climate change. “The global ocean is as warm now as it has ever been,” says Kevin Trenberth, a senior scientist at the National Center for Atmospheric Research. “The main consequence of that is that winter storms can dump much bigger snowfalls if they combine with cold air.”


(Wired.)

See Booby, some of the causes of the superstorm about to hit is WARMER OCEANS! Now, you obviously don’t have the intelligence or education to understand all this—that is why you so uncritically swallow the snake oil Dubyne dishes out—but just understand meteorology is much more complex than you can begin to understand.
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Re: Bomb cyclone

Postby HBS Guy » 05 Jan 2018, 19:20

More on the weather bomb:

NOW, THE FIRST thing you should know about a bomb cyclone is it’s just a name—and unlike a sharknado, it’s not a literal one. The very real scientific term describes a storm that suddenly intensifies following a rapid drop in atmospheric pressure. Bombing out, or “bombogenesis,” is when a cyclone’s central pressure drops 24 millibars or more in 24 hours, bringing furious winds that can quickly create blizzard conditions and coastal flooding.

It’s actually not that rare a phenomenon; meteorologists estimate these kinds of storms break out in the Northern Hemisphere about 10 times a year. They can go by other names, like Nor’easter and mid-latitude cyclone, which may explain why you’ve never heard of one before Winter Storm Grayson started dumping snow in Tallahassee on Wednesday morning. But Grayson isn’t your typical bombogenerator.

It’s what happens when everything comes together just right (or just wrong). Grayson is expected to explode up the East Coast between now (3rd Jan) and Friday, intensifying as it makes its way from Florida to Nova Scotia, blowing record snowfalls around at category 3 hurricane wind speeds. “This storm is a synoptic meteorologist’s dream,” says Paul Huttner, who watches the weather for Minnesota Public Radio. “It’s a perfect alignment of the three things we look for.”

NOW, THE FIRST thing you should know about a bomb cyclone is it’s just a name—and unlike a sharknado, it’s not a literal one. The very real scientific term describes a storm that suddenly intensifies following a rapid drop in atmospheric pressure. Bombing out, or “bombogenesis,” is when a cyclone’s central pressure drops 24 millibars or more in 24 hours, bringing furious winds that can quickly create blizzard conditions and coastal flooding.

It’s actually not that rare a phenomenon; meteorologists estimate these kinds of storms break out in the Northern Hemisphere about 10 times a year. They can go by other names, like Nor’easter and mid-latitude cyclone, which may explain why you’ve never heard of one before Winter Storm Grayson started dumping snow in Tallahassee on Wednesday morning. But Grayson isn’t your typical bombogenerator.

It’s what happens when everything comes together just right (or just wrong). Grayson is expected to explode up the East Coast between now and Friday, intensifying as it makes its way from Florida to Nova Scotia, blowing record snowfalls around at category 3 hurricane wind speeds. “This storm is a synoptic meteorologist’s dream,” says Paul Huttner, who watches the weather for Minnesota Public Radio. “It’s a perfect alignment of the three things we look for.”

The first is a warm conveyor belt of tropical moisture, which the Gulf Stream is shuttling out of the Caribbean and right up the Atlantic coast. That’s pretty normal for this time of year. What’s less normal is the huge subzero air mass that dipped down from the Arctic about 10 days ago, plunging the Great Lakes and Eastern US into a sustained deep freeze.

Every year, around this time, the sun stops shining above the Arctic circle. No radiation means no heat, which means all that air gets real cold real quick. Most of the time, jet streams—the easterly flowing air currents near the upper reaches of the atmosphere—keep that cold air bottled up in the Arctic. But sometimes, upper air waves shift, forcing a buckle in the jet stream and allowing all that air to spill southward.

“The coldest air on the planet just happened to slide over Northeast America,” says Huttner. “And with this incredible moisture feed we’ve now got a huge temperature contrast. By the time this thing gets up into New England we’re talking about a good 100 degrees of temperature contrast across the center of the storm. And generally speaking, the stronger the temperature contrast, the deeper the storm.”

Differences in temperature, you see, lead to differences in pressure. As the pressure drops, air rushes in. The faster it drops, the faster the air moves. And thus, a winter storm is born.

Unlike hurricanes, which slow down as they head north and get away from the moist heat of the ocean, bomb cyclones tend to reach their peak intensity when they hit New England. That’s where the maximum temperature contrast usually is. It’s also where the third thing meteorologists look for—a low pressure trough in the upper levels of the atmosphere—happens to be occurring right now.


https://www.wired.com/story/why-the-bomb-cyclone-hitting-the-east-coast-is-so-unusual/?mbid=nl_010418_daily_list1_p1

Bow, Booby, most of this will have gone over your pointy head. Just gather that reality is more complex than Dubyne lets you know, you pathetic gullible fool!
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Re: Bomb cyclone

Postby pinkeye » 06 Jan 2018, 01:34

Get over OzPol Monk....

This bomb corresponds with heat elsewhere. The planet is trying to achieve a balance, against unreasonable odds I might add.
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Re: Bomb cyclone

Postby HBS Guy » 06 Jan 2018, 05:07

Booby posts here as well as OzPol.
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Re: Bomb cyclone

Postby MilesAway » 06 Jan 2018, 15:05

pinkeye wrote:Get over OzPol Monk....

This bomb corresponds with heat elsewhere. The planet is trying to achieve a balance, against unreasonable odds I might add.

Weather is always trying to achieve an unachievable balance: that’s the normal condition!

The preponderance,... if there shown to be a proponderance, of bomb cyclones is showing a phase change in the climate!

Balance is always sought, even under normal conditions!

:jump
Last edited by MilesAway on 07 Jan 2018, 12:55, edited 1 time in total.
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Re: Bomb cyclone

Postby MilesAway » 06 Jan 2018, 15:05

HBS Guy wrote:Booby posts here as well as OzPol.

Fu k booby :bike :bike
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Re: Bomb cyclone

Postby HBS Guy » 06 Jan 2018, 15:40

Well, yes, I agree about Booby DRAH.
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