Vaya tormentones, hay 3 zonas de especial atencion ahora mismo en el centro de USA    mesociclones por doquier  :<<O

En España nos matamos por ver 1 y alli es raro en esta fecha el dia que no ahy alguno      :<<O

Son unos buenos bicharracos... menudas reflectividades juasjuas yo tambien quiero!!

La verdad es que nunca me había parado a seguir una situación de tornados en EEUU. Queda lejos pero se aprende mogollón  :</O

Fíjate en la complejidad de los ecos registrados, en las imágenes que pone Ermu en la página anterior. Viene a cuento de lo que te comentaba ayer, Pablo. Se caga uno las patas abajo viendo esas imágenes de radar

El Tornado de Greensburg fue un EF5. Parece ser que sus vientos superaban los 200 mph. Estos datos ya son oficiales.

Así es ermu !! es el primer tornado EF-5 nunca antes evaluado desde que está la nueva escala ampliada en febrero de 2007. Unos datos brutales, paso el texto integro en ingles:

The huge, 1.4 mile-wide tornado that devastated Greensburg, KS on Friday night, May 4, was an EF-5 tornado on the Enhanced Fujita Scale. A preliminary damage survey by the National Weather Service found that the storm likely had 205 mph winds, putting it just above the 200 mph wind threshold for an EF5 rating. This is the first tornado ever rated as an EF5 using the new scale, adopted in February of 2007, and the first tornado to receive a "5" rating since the May 3, 1999 Moore-Bridge Creek tornado that devastated the southern suburbs of Oklahoma City. Note that the Greensburg tornado may have only been rated an F4 on the old Fujita scale, but the distinction is probably irrelevant, since the twister basically destroyed everything in its path. Had the Greensburg tornado hit downtown Chicago, the death toll could have easily been in the thousands, as I discussed last month in my blog, "Big Wind in the Windy City".

The severe storm action finally quieted down yesterday in Kansas and the Plains; only 11 reports of tornadoes were received, compared to 93 on Saturday and 33 on Friday. The severe weather action should stay at a slow simmer through Wednesday over the Plains; the Storm Prediction Center (SPC) has portions of the region under its "Slight Risk" area for severe weather through Wednesday. Flooding is a major concern now; most of eastern Kansas, plus large portions of Oklahoma, Texas, Missouri, Iowa, Nebraska, and South Dakota are under flood warnings. More heavy thunderstorm rains during the week are expected to add to the problem.

We've saved some extraordinary 1 Mb animations of the radar reflectivity and Doppler velocities of the tornado. I asked wunderground meteorologist and tornado expert Rob Carver to comment on what's going on in the animations, and here was his analysis:

This was likely an example of cyclic mesocyclogenesis. In a nutshell, the rear-flank downdraft surges out, wraps around and occludes the mesocyclone (Meso A for short). Meso A then veers to the left and dies, this is why tornado family members curve to the left as they dissipate. While Meso A is dying, a new meso spins up and becomes the dominant meso. Now, while I've seen plenty of simulated cyclic cases where the hook retreats when Meso A occludes, I don't think I've seen anything as dramatic.

Wunderblogger Mike Theiss was out chasing the weekend storms; be sure to tune into his blog over the next few days to read his chase accounts.

Las reflectividades se iban a cerca de los 75Db ya no hay mas 
http://www.wunderground.com/hurricane/2007/greensburg_zoom_anim.gif

Doppler donde se ve la velocidad del tornado 
http://www.wunderground.com/hurricane/2007/greensburg_vel_anim.gif

Flipantes datos 

Bueno me respondo a mi mismo. Viendo este ultimo post de seal y este enlace http://www.meteored.com/ram/numero44/fujita.asp veo que la cosa ha cambiado. No acabo de entender el motivo del cambio pero bueno..... Si no he entendido mal esta nueva escala es menos "rigurosa", así un tornado EF5 podría ser de categoría 4 con la antigua escala.

This was likely an example of cyclic mesocyclogenesis. In a nutshell, the rear-flank downdraft surges out, wraps around and occludes the mesocyclone (Meso A for short). Meso A then veers to the left and dies, this is why tornado family members curve to the left as they dissipate. While Meso A is dying, a new meso spins up and becomes the dominant meso. Now, while I've seen plenty of simulated cyclic cases where the hook retreats when Meso A occludes, I don't think I've seen anything as dramatic.

Me quedo con esa parte del texto: el tío dice que no ha visto un caso de mesociclogénesis (se refiere a la formación de nuevos mesociclones en la supercélula) tan dramática como la quie recoje la secuencia de radar.

Y el caso del radar Doppler, más claro imposible

NUEVA OLA DE TORNADOS EN EEUU

Aparicion de un tornado F5!!!!

Enlace: http://168horas.com.ar/070508/070508_21.htm

Rode, se esta hablando de ello en este mismo hilo desde hace 2 paginas 

Los de la web http://www.tornadovideos.net/ tienen actualizada la información en todo momento y al parecer ese tornado sin duda alguna fue en F5 esta imagen de radar es impresionante lo que daríamos por tener algo así aquí coño!




Un saludo.