Re: Incoming!

2008-12-21 Thread Alberto Vieira Ferreira Monteiro
Ronn! Blankenship wrote:

 Still in the 60s here, though I've already closed
 the windows.  Expected to be in the upper 30s by
 morning, and maybe as low as 20 (°F, for Alberto,
 et. al.) Monday or Tuesday morning . . .

It's depressingly cold here in the (alleged) tropics.
We miss the days when temperature was 40.

Alberto Monteiro
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Re: Incoming!

2008-12-21 Thread Nick Arnett
On Sat, Dec 20, 2008 at 8:11 PM, Ronn! Blankenship 
ronn_blankens...@bellsouth.net wrote:


 The worst fog I have ever seen was one night
 between Windsor and Toronto, where literally all
 that was visible was a few feet of the road right
 in front of the car.  And all the natives were flying by at 70 or 75 mph .
 . .


Did you know that studies have shown that people unconsciously speed up in
fog?   People who can't see a speedometer will consistently think they are
going slower -- significantly slower -- than they really are.

We hit Tule fog (http://en.wikipedia.org/wiki/Tule_fog) in the Central
Valley a couple of years ago and I did what I know I should have done many
times before -- immediately got off the road and stayed the night in a
motel.  That motel was close to empty when we checked in; it was full an
hour later.  Actually, it's not quite right to say we hit that fog.  More
like it formed around us.

On the other hand, a year ago we got into some incredibly dense fog
somewhere in Nevada, near Battle Mountain, IIRC, and decided to make our way
east carefully - I checked current conditions in the next few towns and
nobody was reporting fog.  Sure enough, a half mile down the road we broke
out of it into totally clear conditions.

And, as long as I'm rambling on about fog... One of the more startling
experiences one can have when landing an airplane is caused by a thin layer
of ground fog.  On approach, you can hardly even see that the fog is there,
since you are looking down through its thinnest dimension.  But just before
touchdown, you're looking the long way through it and suddenly, really
suddenly, you can't see a lot of the runway.  Disconcerting, to say the
least, because when landing you look way down the runway in order to judge
how far off the ground you are.  It suddenly becomes much more like a night
landing than a daytime one.  (When landing at night, you can't really judge
your height accurately, so you basically fly the airplane all the way to the
ground instead of gently settling it in as you do during the day.  Ideally.)

Nick
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Re: Incoming!

2008-12-21 Thread Julia Thompson



On Sat, 20 Dec 2008, Ronn! Blankenship wrote:


At 10:13 AM Saturday 12/20/2008, Bruce Bostwick wrote:

On Dec 20, 2008, at 10:07 AM, Julia Thompson wrote:


If the forecasts are correct by this time tomorrow I will need to dig
out the winter gear again . . . though at least the week of
almost-constant rain will be ending . . .


And -- according to my local forecast, a cold front is coming
through
sometime between this afternoon and tomorrow morning.

I wish it would just make up its mind what temperature it's going to
be

  Julia




Still in the 60s here, though I've already closed
the windows.  Expected to be in the upper 30s by
morning, and maybe as low as 20 (°F, for Alberto,
et. al.) Monday or Tuesday morning . . .


In the 30s today.


And the day or two of fog we get after each cold front is only
entertaining up to a point.




Fog?  Yep, we've been having that, too . . .


Most of the driving I do first thing in the morning is on rural roads, 
just 1 block on anything you could call a highway and a little more than 
a mile on something that's neither highway nor rural in character.  People 
are relatively sane with their driving, but it's kind of weird to see the 
Highway Intersection 1000', have the road curve so the actual distance 
to the closest bit of highway is significantly less than that, and being 
*barely* able to see the rise of the main part of the highway to go *over* 
the road.


Then the next morning, there was comparable but not identical fog.  I had 
fun comparing the two mornings in the same spots as I went along.  (Stuff 
south of the highway was denser, in general, on the second morning, while 
the stuff north of it was less dense the second morning.)



The effect an actual dense fog has on
people's driving behavior in Texas has to be seen to be believed.


On the roads you're on, Bruce, yes.  On the roads I was on, people mostly 
just moderated their speed and didn't do anything stupid.  :)



The worst fog I have ever seen was one night
between Windsor and Toronto, where literally all
that was visible was a few feet of the road right
in front of the car.  And all the natives were flying by at 70 or 75 mph . . .




(They can mostly deal with rain, up to a point.  Snow or ice, forget
it. :)




I suspect that it's worse in Utah the first time
it snows.  Apparently over the summer everyone
forgets how to drive in snow.  At least here it's
rare enough that people treat it as unusual and
take more care.  Also, when snow is likely
schools cancel class and other things shut down
so there are fewer people trying to get through
it (though for the women who go into labor during
the storm and need to get to the hospital on the top of the hill . . . )

And to tie-in to another thread:  that is one of
the times people around here rely on their TV-band radios . . .


We don't get ice or snow very often at all, but when we do, it tends to 
shut stuff down rather badly.


If I thought I'd be able to stop at the end of my street when it ices, I 
could manage to get around -- but it's partly that I know you need to be 
extra, extra cautious for that, and I'm good at skid recovery, as long as 
I manage to stay on the road.  (Hence the potential problem at the end of 
my street.)


I also found out on Friday that I still remember how to walk on ice -- I 
was walking down a hallway with enough water on the floor to make it slick 
in spots, and I just automatically went into ice-walking mode to reduce 
the chances of my slipping.  That was weird.  Then again, a lot about 
Friday was weird.  (I may reconsider the hit all 3 kids' holiday parties 
at school thing next year, for one thing.)


Julia
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Re: Incoming!

2008-12-21 Thread Euan Ritchie

 It's depressingly cold here in the (alleged) tropics.
 We miss the days when temperature was 40.

Yesterday was the Summer solstice here in the South Pacific and the day
before was cold - only 6 degrees celsius.

Global warming harumph.
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Re: Incoming!

2008-12-21 Thread Alberto Vieira Ferreira Monteiro
Euan Ritchie wrote:

 It's depressingly cold here in the (alleged) tropics.
 We miss the days when temperature was 40.

 Yesterday was the Summer solstice here in the South Pacific and the day
 before was cold - only 6 degrees celsius.

 Global warming harumph.

The science-deniers at Conservapedia are making fun of Global Warming.

It seems that AGW proponents were involved in scientific fraud.

Alberto Monteiro
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Re: Incoming!

2008-12-21 Thread Nick Arnett
On Sun, Dec 21, 2008 at 3:46 PM, Alberto Vieira Ferreira Monteiro 
albm...@centroin.com.br wrote:


  Yesterday was the Summer solstice here in the South Pacific and the day
  before was cold - only 6 degrees celsius.
 
  Global warming harumph.


The fact that it is colder in some places than normal may be a sign of
global warming.  I know that some predictions say that global warming will
make it colder and wetter here in our part of California because more cold
air will be sucked off the Pacific by rising air in a hotter Central Valley.

Global warming will lead to less stable weather and more extremes.  Or
already is.

Nick
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Re: Incoming!

2008-12-21 Thread Bruce Bostwick
On Dec 21, 2008, at 11:41 AM, Nick Arnett wrote:

 And, as long as I'm rambling on about fog... One of the more startling
 experiences one can have when landing an airplane is caused by a  
 thin layer
 of ground fog.  On approach, you can hardly even see that the fog is  
 there,
 since you are looking down through its thinnest dimension.  But just  
 before
 touchdown, you're looking the long way through it and suddenly, really
 suddenly, you can't see a lot of the runway.  Disconcerting, to say  
 the
 least, because when landing you look way down the runway in order to  
 judge
 how far off the ground you are.  It suddenly becomes much more like  
 a night
 landing than a daytime one.  (When landing at night, you can't  
 really judge
 your height accurately, so you basically fly the airplane all the  
 way to the
 ground instead of gently settling it in as you do during the day.   
 Ideally.)

 Nick

I've know pilots who've encountered this themselves.  I have it on  
reliable authority that it's extremely disorienting if you're not  
prepared for it.

I also know someone who got fooled by an optical illusion one day when  
a runway was covered by blowing dust, and lined up his landing  
approach where he thought the runway was, then dropped about 20 feet  
into the dust and bounced right off the runway.  In a B-24J  
Liberator.  :)  (I'm pretty sure he *didn't* crack the main gear  
trunnions or blow the tires, but it was a rather, um, *firm* contact  
with the runway even so.)

The thin fog layers can be interesting even driving, though.   
Sometimes they do strikingly beautiful things like mask the road and  
the horizon, but show hints of clear sky above.  I've seen it thin  
enough that the top of the car is actually above the fog bank, or fill  
up a small valley in between the hill I'm topping and the next one.

My favorite, though, is the suspended fog layer a couple of feet or so  
off the ground and only a few inches thick.  Those only form when  
there is *no* wind, at all, and usually aren't visible unless you see  
them almost edge-on.  They don't ever form on highways because the air  
movement from a passing car will stir them up too much, but they form  
in the fields beside the road here and there.  It's just a rather  
visually striking phenomenon, for me at least .. :)

You wanna tempt the wrath of the whatever from high atop the thing?  
-- Toby Ziegler


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