A sign of the apocalypse?
I went to bed early last night to get rid of a headache, but wasn't able to sleep for over an hour due to a terrible thunderstorm.A thunderstorm in January? Uh-huh, but that's not even the odd part.
This storm didn't deliver torrents of rain to flood our storeroom, as I had worried. Instead it dumped nearly an inch of snow.
Snow. From a thunderstorm.
Has anyone ever experienced this? Could it be the end of the world? If so, I'd like to know ahead of time so I can take the next few days off.


10 Comments:
Posted by:
Unknown at 1/25/2006 9:53 AM
Don't you know that what's been happening in DC the last five years IS the Apocalypse? Wasn't an Evil One supposed to rise to power before it all ended?
Crap, the verification words keep getting longer. One of these days they'll make us retype the Gettysburg Address backwards just to post a comment.
Posted by:
Jeri at 1/25/2006 10:44 AM
As for the word verification, for me the hard part is reading the letters because they are shaped so odd. That's why I chose not to do word verification on my own blog. Just easier. And I have to tell you Jeri, I'm so looking forward to your first Luna.:-)
Posted by:
Unknown at 1/25/2006 6:27 PM
------------
Basically, lightning (thunder) requires electric charge separation in a cloud.
This happens when cloud particles of different sizes, carrying different charges, collide with each other, exchange charge (with one polarity going preferentially to one type of particle, the other going to the other), and then are carried apart by either wind or their own gravity. For the most part, we're talking ice particles, so the electrified region has to occur in a cold enough region of the atmosphere to support ice. In the summer, that's far above the ground surface; in the winter, it may be near or at the surface.
There's a wrinkle: the environment that this separation works best in has to have both ice *and* liquid water present (we call this supercooled water; water that retains liquid state despite the air temperature being < 0C ... water needs what's called nucleating agents in order to freeze, and these aren't always immediately available in the neighborhood of a cloud droplet).
In summer, the updrafts (vertical wind) in storms is strong enough to carry lots of supercooled water into the <0C regions of storms ... so there's plenty of charge separation going on.
In winter, there's less surface heating, and less buoyant surface air (smaller updrafts, or vertical wind) to carry this supercooled water aloft. The surface air is also colder, so it can hold less total water to begin with. The electric "generator" in wintertime storms basically lacks juice :-) ... both total water going into the cloud particle formation, and less of it occurring in that supercooled form needed for charge separation.
"Thundersnow" storms are rare exceptions where enough water survives in supercooled state to trigger the charging process.
Lightning can also happen in winter storms from very very slow electric charging in the absence of supercooled water, if the air motion is mostly horizontal rather than vertical (frontal type systems). Weak charging + long separation time can still yield strong electric fields, but the generator is working slower, so the lightning flash rate is much lower as well. (Lightning works to relax the electric fields built up by charged particle separation, by moving the charge back in the other direction ... i.e., it "runs down" the generator).
---------------
This would make sense, in that there we only heard a couple loud thunder claps....
Posted by:
Andrew at 1/25/2006 6:36 PM
Ugh, Kathy, sorry to hear of your travails with the Medicare system's pharmacy plan. Hope you get back on your meds very soon!
I had to turn on word verification to prevent blogspam. Although some of it was rather entertaining.
Posted by:
Jeri at 1/26/2006 6:59 AM
I remember at least one occasion of thundersnow from growing up in upstate NY, but it is pretty unusual.
Fun scary-weather pastime: Stand facing the dark rolling clouds, spread your arms, and practice your Saruman impression.
Posted by:
Dave S. at 1/26/2006 4:06 PM
Posted by:
Unknown at 1/27/2006 3:25 AM
Kathy, hope you feel better and that the antibiotics work. Everyone go visit Kathy's blog!
Posted by:
Jeri at 1/28/2006 2:25 PM
Posted by:
Dave S. at 1/29/2006 2:54 PM
Posted by:
Jeri at 1/29/2006 3:32 PM
Post a Comment