Coming; Derechos or not. …
The USA (and, for all I know, Mexico and Canada) are going to be getting some tornadoes and or derechos. Derechos are the kind of weather you would experience on top of a skyscraper in Chicago on a windy day.
The word is Spanish for straight line winds; that is, there is no vorticity with them, they are not twisters. I have never studied them before and I hope you will join me in my first attempt to armchair-chase these.
If you want some serious meteorological discussions on this sort of thing, here are some good places to start. The moon is up north (10th December, 2011 @ 01:35 pm, it will decline +22:33 to the equator) so let's start with Chicago:
http://www.skywarnonline.com/forums/showthread.php?t=5433
If you have a camera I would advise you keep it with you all through the next spell. It starts tomorrow so you have the weekend to prepare for the full blast:
http://www.skywarnonline.com/forums/showthread.php?t=5457
You might want to keep an eye on this page too:
http://www.spc.noaa.gov/climo/reports/today.html
What will happen is that the storm systems will flow through the states west to east (I am expecting most reports to be along the east coast but you never know.)
So much for derechos, tornadoes are far more likely with a spell at this time: 02:30; 08:30; 14:40 and 20:30. We could even have them in Britain, I don't know what we have just had but from the comments on Usenet it WAS something to talk about.
***
With a time of phase on the half hour, a Greenland High will dominate the North Atlantic. This is what it looked like to a satellite last week:
And here it is in all its glory:
http://www.woksat.info/etctl05/tl05-1447-c-grn.html
Well that's about it. To anyone caught in this stuff, good luck.
I hope I am wrong.
But I know I won't be. (And it's not just the way I tell 'em.
weathercharts 
Originally posted by Weatherlawyer:
Contrariwise, it is from Opera I think. If you want to avoid replicated comments when that Opera advertisement appears go to Latest Activities and look at if your new comment is displayed if not… you must try again! Just in that case.
O, Michael, I just was referring to that Canada to Russia/Spain to northen Greenland 300 miles in diameter storm where you made mention to acoustic thing (http://my.opera.com/Weatherlawyer/blog/2011/12/09/10-december-2011-full-moon-14-38#comment77222642). I've thought if that thing, acoustic thing I mean, as the cause of both, large tropical and North Atlantic ones, is a matter of pressure… Weather and seismology happens all over the planet due to the same cause, all at the same time: un acoustic agent.Look, sound is a mechanical wave that is an oscillation of pressure transmitted through any means possible*… Nothing can stop it.* a solid, liquid, or gas
Originally posted by tdjmd1:
Yes, only dissipation. So the first proverb in the collection by Richard Inwards is:"Dry or wet the weather will always pay its debt."In some parts of the same continent they will have fires due to drought and heat whilst on the other side of it it will be flood damage causing the problem, all in the same spell.That's if the power is dissipated in the atmosphere. It can stir the water under the ground just as easily.Of course this is all so much theory. It's just that I spent so many years trying to make the orther theories fit too. And they just plain DON'T!Next week the spell looks like it will be ruled by a frequency node or chord or tone or whatever because of the Lows that are going to station themselves at the foot of Greenland and over the middle of the Baltic.That's about 2000 miles. It's difficult to find places in Greenland to get measurements to and from. But the internet is brilliant for sorting all this stuff out.This theory could never have got into anyone's head without the 'net. Andall the rest of the material too. Talk about being in the right place at the right time.Sometimes I feel so astonished and delighted I get a feeling like I can't believe it. Yet here I am the only one.That Tamil from Coimbatore. He can forecast earthquakes without amodern weather centre. If I could I would send him one. A sunlight and temperature data collector certainly. Even with only a crappy internet connection he is still managing to work wonders.And yet he hasn't had the ability I have to search files that I can because he doesn't speak English and ALL weather archives are in English.But still he presses on undaunted.He is a most remarkable man.In New Zealand the forces of academia have thrown themselves on the neck of another one of us (Ken Ring.) And yet he is still able to continue despite the pages and pages of absolute hate filled drivel directed at him.But because I live on the shores of an ocean that reflects all the acoustics of the planet particularly well, have the finest meteorological office of them all -next to no.. as good as Canada and USA and Germany that is.(Once it was without peer but even today (despite the British) it is still one of the best.)Anyway, I just happen to deeply interested in this sort of stuff and totally unable to understand the "proper stuff" about it, I was forced to go back to the beginning and make educated guesses. Most of them wrong but occasionally enough of them correct enough to encourage me to continue…Well here I am. And there you are, wondering if any of this is true. I don't envy you.Just stick around a while and see what else unfolds.***I loaded a lot of add ons for Firefox recently. I's slower than a crab with crabs now. So these failures to post are doubly irritating.There is alw…Hey wait.. computer problems, a big quake… Is it over yet?Well now I don't feel so bad.Has it occurred to you that if the power has been there since the moon was placed in position, there couldn't possibly have been an ice-age.Cold spells yes, for maybe frightening periods and year long droughts maybe more in others. Those 7 good harvests followed by 7 bad ones in ancient Egypt and the bad times in Africa in the mid 1970's.But when the fertile places fail, the deserts blossom. I'll bet the if there are any desert regions next to where they had prolonged droughts, they were subject to floods.Jehovah always make the way out.
Originally posted by Weatherlawyer:
No Michael, excuse me. That's happening to everyone. It's Opera server I assure you. Hehe. Cheeky as ever, you know…
Have it your own way. Are all Venusians like you?(Too far away to slap.)
Originally posted by Weatherlawyer:
Of course not. Are you looking at someone else for here? O my! My sister… but she's really lovely, Michael. She's my non alter ego I think.Last days ago I asked her… what do you think about me and she said… 'you are so plainly cheeky' :happy:
Here let me clean that up for you: 5.3 2011/12/17 06:09:09 MONA PASSAGE, PUERTO RICO 5.1 2011/12/17 06:06:12 MONA PASSAGE, PUERTO RICO 5.5 2011/12/16 12:54:25 OFF THE COAST OF AISEN, CHILE 5.2 2011/12/16 12:02:57 OFF THE COAST OF AISEN, CHILE 5.6 2011/12/15 15:12:47 IZU ISLANDS, JAPAN REGION 5.3 2011/12/15 13:05:55 IZU ISLANDS, JAPAN REGIONThese double quakes occur probably for the same reason that double centred Lows (and Highs ) do.I don't know why but they always (almost always) appear at the end of a series of tropical storms. In other words they associated with cyclosis in some way.Twin Lows = cyclogenesisTwin quakes= cyclosis.I haven't thought that one out yet.Any ideas?
These are show stopper:Latest Earthquakes M5.0+ in the World – Past 7 daysLatest Earthquakes Magnitude 5.0 and Greater in the World – Last 7 daysVersión en EspañolMagnitude 5 and greater earthquakes located by the USGS and contributing networks in the last week (168 hours). Magnitudes 6 and above are in red. (Some early events may be obscured by later ones on the maps.)The most recent earthquakes are at the top of the list. Times are in Coordinated Universal Time (UTC). Click on the word "map" to see a ten-degree tall map displaying the earthquake. Click on an event's "DATE" to get a detailed report.DISCLAIMERUpdate time = Sat Dec 17 15:29:33 UTC 2011 MAG UTC DATE-TIMEy/m/d h:m:s LATdeg LONdeg DEPTHkm RegionMAP 5.0 2011/12/17 10:18:19 -32.770 -178.405 15.8 SOUTH OF THE KERMADEC ISLANDSMAP 5.3 2011/12/17 06:09:09 18.172 -67.371 17.0 MONA PASSAGE, PUERTO RICOMAP 5.1 2011/12/17 06:06:12 18.188 -67.370 14.0 MONA PASSAGE, PUERTO RICOMAP 5.2 2011/12/16 23:18:04 -10.730 102.183 13.3 SOUTHWEST OF SUMATRA, INDONESIAMAP 5.3 2011/12/16 21:49:37 -55.978 -143.640 10.0 PACIFIC-ANTARCTIC RIDGEMAP 5.2 2011/12/16 19:30:17 4.248 93.300 25.7 OFF THE WEST COAST OF NORTHERN SUMATRAMAP 5.5 2011/12/16 12:54:25 -45.852 -76.264 10.0 OFF THE COAST OF AISEN, CHILEMAP 5.2 2011/12/16 12:02:57 -45.852 -76.075 9.9 OFF THE COAST OF AISEN, CHILEMAP 5.6 2011/12/15 15:12:47 31.744 141.511 15.4 IZU ISLANDS, JAPAN REGIONMAP 5.3 2011/12/15 13:05:55 31.693 141.695 11.1 IZU ISLANDS, JAPAN REGION
Originally posted by BBC:
http://www.bbc.co.uk/news/world-asia-pacific-16229394
http://www.bbc.co.uk/news/world-asia-pacific-16234718
http://www.bbc.co.uk/news/world-asia-16234549