Hurricanes can spawn tornadoes

Hurricanes can spawn tornadoes
http://www.aip.org/isns/reports/2005/012.html

Even if you're not in Hurricane Katrina's path, you may be feeling its
effects if a tornado comes nearby. Scientists have discovered that
hurricanes can actually encourage the formation of tornadoes. When
meteorologists studied hurricane-related damage, they found some damage
that didn't fit the pattern, and discovered it was actually damage
resulting from hurricane-related tornadoes.

How tornadoes form

Air is a gas and water is a liquid, but in the realm of science, both
fall into the category of fluids. When a fluid's flow is disturbed
somehow, it causes turbulence. For instance, branches sticking into and
under the water can disrupt the flow of a stream, forming tiny eddies
or whirlpools. The same thing happens when you move your hand quickly
through water. Technically, these are known as vortices. The water
moves in a circular motion around a central point, and this causes a
depression or cavity to form in the center, which draws flowing objects
towards that center. Think of water spinning down the bathroom drain.

These sorts of swirling vortices can also form in air. As a
thunderstorm develops, if the wind speeds up and changes direction,
this can cause a horizontal spinning effect in the lower atmosphere. As
air rises, pulled upwards by the developing thunderstorm, it tilts the
horizontal rotation into a vertical rotation. A tornado is simply a
violently rotating column of air that extends from a thunderstorm in
the atmosphere to the ground. The pressure inside can be 10% lower than
the surrounding air, and this causes that air to rush towards the
low-pressure center from all directions. As it streams inward, the air
spirals upward around the core until it merges with the airflow of the
thunderstorm that gave rise to the tornado.

Sam Wormley wrote:
Hurricanes can spawn tornadoes
http://www.aip.org/isns/reports/2005/012.html

Even if you're not in Hurricane Katrina's path, you may be feeling its
effects if a tornado comes nearby. Scientists have discovered that
hurricanes can actually encourage the formation of tornadoes.


And that's news? Anybody down here in hurricane country is and has been
aware of this fact.

Peace,
Rod Mollise
Author of _Choosing and Using a Schmidt Cassegrain Telescope_
http://skywatch.brainiac.com/astroland/index.htm

Like SCTs and MCTs?
Check-out sct-user, the mailing list for CAT fanciers:
http://groups.yahoo.com/group/sct-user

See: http://journals.aol.com/rmollise/UncleRodsAstroBlog/
For Uncle Rod's Astro Blog.

Hurricanes can spawn tornadoes? No kidding.

Katrina hit my home in Bay Saint Louis, MS, on Monday, 29 August. On
Sunday, by wife and I bundled up an elderly aunt and uncle (who complained
all the way), a cousin and her 80-year-old boyfriend, and we headed for
another cousin's hunting lodge near Laurel, MS, 150 miles from the Gulf.

Big mistake.

The lodge is located on 5,200 acres of piney woods -- pine trees are 60 - 80
feet tall with a few oaks, hickories, etc.

As the eye of Katrina was crossing the coast, the outer bands were hitting
us. Between 1900 Sunday and 2100 Monday, we counted 12 tornadoes roaring
past, around, and over us. Counted over 200 pine trees, all snapped off
8-15 feet above the ground. Very large oak tree was felled across the porch
of the lodge -- right on top of a rocking chair where I had been sitting 10
minutes earlier watching the storm -- I had gone inside to get another cold
one when the tornado ripped through the lawn, downing the tree on the porch
and destroying my rocking chair. Sunday night and all day Monday were
exciting to say the least -- lost electricity around 1700 Sunday and we
spent Sunday night and most of the day Monday huddled together in the middle
of the lodge, sleeping on sofas and listening for the next tornado -- and,
yes, they really do sound like freight trains roaring past. Tuesday morning
I dug out a chain saw and cut our way out of the driveway, allowing us to
get to south Louisiana where we lived with family for three weeks. We are
now back in northeast Tennessee at 1,500 feet above MSL and we are not
coming down

We were living in an apartment in Bay Saint Louis, building a house in
Waveland, with our property stored in Pass Christian -- all three of these
communities were essentially wiped off the map -- we managed to salvage a
couple of tables, some chairs, dishes, and the clothes we carried with us.

Check out:
http://www.schlatter.org/Katrina/Katrina%20page%201.htm

And check out what my ETX-90 looked like in our apartment (the XT-8 was in
our storage unit -- never did find it after the storage facility was wiped
out by a 20 foot storm surge).
Go to this page and scroll down to the update:
http://www.schlatter.org/Dad/Astronomy/etx%2090.htm

"Sam Wormley" wrote in message
news:SaLbf.521163$x96.392204@attbi_s72...
Hurricanes can spawn tornadoes
http://www.aip.org/isns/reports/2005/012.html

Even if you're not in Hurricane Katrina's path, you may be feeling its
effects if a tornado comes nearby. Scientists have discovered that
hurricanes can actually encourage the formation of tornadoes. When
meteorologists studied hurricane-related damage, they found some damage
that didn't fit the pattern, and discovered it was actually damage
resulting from hurricane-related tornadoes.

How tornadoes form

Air is a gas and water is a liquid, but in the realm of science, both
fall into the category of fluids. When a fluid's flow is disturbed
somehow, it causes turbulence. For instance, branches sticking into and
under the water can disrupt the flow of a stream, forming tiny eddies
or whirlpools. The same thing happens when you move your hand quickly
through water. Technically, these are known as vortices. The water
moves in a circular motion around a central point, and this causes a
depression or cavity to form in the center, which draws flowing objects
towards that center. Think of water spinning down the bathroom drain.

These sorts of swirling vortices can also form in air. As a
thunderstorm develops, if the wind speeds up and changes direction,
this can cause a horizontal spinning effect in the lower atmosphere. As
air rises, pulled upwards by the developing thunderstorm, it tilts the
horizontal rotation into a vertical rotation. A tornado is simply a
violently rotating column of air that extends from a thunderstorm in
the atmosphere to the ground. The pressure inside can be 10% lower than
the surrounding air, and this causes that air to rush towards the
low-pressure center from all directions. As it streams inward, the air
spirals upward around the core until it merges with the airflow of the
thunderstorm that gave rise to the tornado.

Joe S. wrote:
Hurricanes can spawn tornadoes? No kidding.

snip

Check out:
http://www.schlatter.org/Katrina/Katrina%20page%201.htm

And check out what my ETX-90 looked like in our apartment (the XT-8 was in
our storage unit -- never did find it after the storage facility was wiped
out by a 20 foot storm surge).
Go to this page and scroll down to the update:
http://www.schlatter.org/Dad/Astronomy/etx%2090.htm

Sucks. Guess that's why you have insurance.

Shawn

Sucks. Guess that's why you have insurance.

Shawn

Yeah, I guess, if the insurance companies would do much paying
out...which they ain't going to do: "Looks like flood damage to me."

Peace,
Rod Mollise
Author of _Choosing and Using a Schmidt Cassegrain Telescope_
http://skywatch.brainiac.com/astroland/index.htm

Like SCTs and MCTs?
Check-out sct-user, the mailing list for CAT fanciers:
http://groups.yahoo.com/group/sct-user

See: http://journals.aol.com/rmollise/UncleRodsAstroBlog/
For Uncle Rod's Astro Blog.

RMOLLISE wrote:
Sucks. Guess that's why you have insurance.

Shawn


Yeah, I guess, if the insurance companies would do much paying
out...which they ain't going to do: "Looks like flood damage to me."

Peace,
Rod Mollise

Flood insurance? I would think it's obvious in an area that close to
sea level, and the gulf. Owners of the $750K houses in his pictures
don't have the "too expensive, can't afford it" excuse. Choice sure,
excuse no.
I see your point though. The wind could've knocked it down and the
surge just washed away what's left. Guess if you could find tree or
other damage in the immediate area consistent with wind velocity
sufficient to knock down the house you'd stand a chance in court. In
two years. :-(

Shawn

RMOLLISE wrote:

Sucks. Guess that's why you have insurance.

Shawn

Yeah, I guess, if the insurance companies would do much paying
out...which they ain't going to do: "Looks like flood damage to me."

Is flood damage specifically excluded from US household insurance?

Regards,
Martin Brown

In article ,
Martin Brown wrote:
RMOLLISE wrote:

Sucks. Guess that's why you have insurance.

Shawn

Yeah, I guess, if the insurance companies would do much paying
out...which they ain't going to do: "Looks like flood damage to me."

Is flood damage specifically excluded from US household insurance?

Often, perhaps usually.

--
Robert Grumbine http://www.radix.net/~bobg/ Science faqs and amateur activities notes and links.
Sagredo (Galileo Galilei) "You present these recondite matters with too much
evidence and ease; this great facility makes them less appreciated than they
would be had they been presented in a more abstruse manner." Two New Sciences