Vortex2 tornado study finally gets some twisters to study

By: Dr. Jeff Masters , 1:56 PM GMT on June 08, 2009

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A proven way to reduce the incidence of dangerous weather phenomena is to schedule a multi-million dollar field experiment to study the phenomena. Up until this past weekend, that has certainly been true of this year's $10 million Vortex2 tornado study. The 7-week study (which also runs next year) has deployed an armada of over 100 storm chasing vehicles across the Great Plains this Spring, but has largely been frustrated by an exceptionally quiet tornado season. Tornado activity in May was less than half of what was observed last year in May, thanks to a ridge of high pressure that has dominated the weather. The residents of Tornado Alley ran out of luck over the weekend, though, as a strong low pressure system and associated cold front brought severe weather and multiple tornadoes to the region. Sixteen tornado reports were received by NOAA's Storm Prediction Center yesterday, and three on Friday. The team of University of Michigan students that has been writing our featured Vortex2 blog caught some excellent pictures of tornadoes on both Friday and Sunday. Yesterday was probably the last best chance for the Vortex2 project to document a strong tornado, since the project ends this Saturday and no significant tornado outbreaks appear likely for the remainder of this week.

Aurora, Colorado tornado yesterday
A tornado with a 3/4 mile wide debris cloud swept through Aurora, Colorado yesterday, staying on the ground for 8 - 11 miles and damaging a shopping mall, but causing no deaths or injuries. The tornado passed close to one of the high-resolution Terminal Doppler Weather Radars (TDWRs) that we now feature on our web site (see the radar FAQ for more details on these great new additions to our radar offerings). Posted below are the reflectivity and Doppler velocity images from the tornado, showing the amazing fine-scale details these high-resolution radars offer.



Figure 1. Radar reflectivity (top) and Doppler velocity (bottom) from the Denver, Colorado Terminal Doppler Weather Radar (TDWR), which caught the classic signature of a supercell thunderstorm tornado over Aurora, Colorado. A tornado dropped down from the low-level mesocyclone inside the parent supercell thunderstorm at the time of these images. Yellow colors located right next to greens/blues indicate that winds are moving towards and away from the radar in close proximity, the signature of strong rotation at low levels. Also visible on the plot are the winds spreading out from a downdraft on the rear side of the tornado. Black arrows denote the direction of wind flow. The dryline was bent back into a E-W orientation near Denver, creating an area of moisture convergence, which triggered thunderstorm formation.

Western Caribbean disturbance unlikely to develop this week
As area of disturbed weather over the Western Caribbean has brought rains of 2 - 3 inches over portions of Nicaragua and Honduras over the past few days. Wind shear is a high 20 - 30 knots over the disturbance, and no computer models are indicating that the disturbance will develop this week.

Jeff Masters, with help from wunderground's tornado expert, Dr. Rob Carver

Dying out after an official 24 minutes on the ground
Tornado (Fungus)
Tornado
Twisted (rrose1)
This was taken approximately 30 minutes after a brief tornado passed through South Hutchinson, KS tonight. The building is a bus manufacturing facility.
Twisted

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They pitch um..I just swing away Press..LOL
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Quoting Vortex95:
520. There was no development what so ever in 2004 until july 31. We got TD 1 this season so 2009 1 2004 0 lol.


TD1 what was that again? Not very prominent in my memory.

Quoting StSimonsIslandGAGuy:
I am glad we may not get any development in June. My dates for first tropical storm is in the July 9-12th on the hurricane contests here.

And to cross the Rubicon means to make an irrevocable decision. It doesn't mean future defeat.


An irrevocable decision can be defeating.
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Ed...he admitted he was JFV a few days ago...wonder why he is not on tonight?
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522...best post of the season so far...
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Quoting Drakoen:
This season is shaping up to be not antithetical to 2004. We may not get any June development.


We didn't get any June development last year either (Arthur didn't develop in June, it merely persisted into June, forming on May 31). I don't think that really signifies much for the season as a whole.
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Quoting Acemmett90:

well played lol


TYVM..

A High Spins Clockwise,a Low Vice versa..

..,Weather wisdom
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530. IKE
Quoting Patrap:
A Columbian Low aint near as good as a Jamaican High.


LOL!
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Quoting Levi32:


Not quite ghost....we did have a tropical disturbance yesterday you know. But the GFS has been overdoing it from the beginning with this one, and is only just now coming to its senses.

Levi, something looked disturbed there for sure. But, imno, it was too erratic, unorganized for reasonably normal development. I'm still thinking the GFS and a few of the models are still adjusting variables to climate conditions.

...they will come! And, I know you guys have fun debating it, following it. Me too, sort of. And, sometimes it's good just to see the ball batted around in here. Some of if it very informative, and some usually entertaining even.

It's all good! There some good people on here with good weather knowledge. And, like they say, you can never make an omelet without breaking a few eggs. No one is going to be right all the time. But, several do a really good job of striving to that end. Good work! Keep it up! :)
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Quoting beell:


Naw, we're having a split over a trough. Or was it a split jetstream merging into one trough.

I can't remember...
)


Lol....the term is "trough-split". It'll start with a low forming within the base of the trough and eventually splitting away.
Member Since: November 24, 2005 Posts: 635 Comments: 26543
Quoting GeoffreyWPB:
An allusion is a figure of speech that makes a reference to, or representation of, a place, event, literary work, myth, or work of art, either directly or by implication. M.H. Abrams defined allusion as "a brief reference, explicit or indirect, to a person, place or event, or to another literary work or passage".[1] It is left to the reader or hearer to make the connection (Fowler); an overt allusion is a misnomer for what is simply a reference.



I finally get it, Drak is JFV>PE>WS, . Nah just an illusion, -- LoL

Illusion
Member Since: June 12, 2005 Posts: 6 Comments: 8185
Quoting Patrap:
met,future type..

Im well aware of the Definition,.. What is Humorous is the usage.

This aint Harvard..FSU maybe,LSU likely.

LOL

>___< Keep pushing it Patrap lol
Member Since: July 19, 2008 Posts: 43 Comments: 4051
A Columbian Low aint near as good as a Jamaican High.
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521. beell
Quoting moonlightcowboy:
Are we still chasing ghost storms derived from the Columbian Low?


Naw, we're having a split over a trough. Or was it a split jetstream merging into one trough.

I can't remember...
)
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This season is shaping up to be not antithetical to 2004. We may not get any June development.
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met,future type..

Im well aware of the Definition,.. What is Humorous is the usage.

This aint Harvard,..FSU maybe,LSU mo likely.

LOL
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Quoting moonlightcowboy:
Are we still chasing ghost storms derived from the Columbian Low?


Not quite ghost....we did have a tropical disturbance yesterday you know. But the GFS has been overdoing it from the beginning with this one, and is only just now coming to its senses.

And remember it wasn't just the Columbian low there was a disturbance in the eastern Pacific that played a big part as well.
Member Since: November 24, 2005 Posts: 635 Comments: 26543
Quoting beell:
Ok, you knew this was coming, mlc-
Remind you of what?

...something. It was your job to remind me! Dayummit! Beell, you just ain't much help! ;)
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Quoting beell:
Ok, you knew this was coming, mlc-
Remind you of what?


lol
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Are we still chasing ghost storms derived from the Columbian Low?
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Quoting Acemmett90:
oh boy check this out comming off africa its a real bone chiller heres the link
http://www.ssd.noaa.gov/eumet/eatl/rb-l.jpg

Maybe if it was Aug-Oct maybe..too early it'll fizzle out...
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512. beell
Ok, you knew this was coming, mlc-
Remind you of what?
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Quoting beell:
retention
Definition: memory
Synonyms: recall, recognition, recollection, remembrance, retentiveness

If you would remind me of this tomorrow, I'd appreciate it! ;)
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509. beell
harmonious
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Quoting GeoffreyWPB:
Rubicon is basically reaching a point of no return.


When one crosses the Rubicon they meet their Waterloo (one's ultimate decisive defeat)
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My English skills are really mediocre lol. All of this is making my head spin.I doubt I pass my AP ENG exam, because my diction is simply too incongruous. Drak, you really helped, thanks.
Member Since: July 19, 2008 Posts: 43 Comments: 4051
506. beell
On July 31, 1931, Austin M. Patterson, Webster's chemistry editor, sent in a slip reading "D or d, cont./density." This was intended to add "density" to the existing list of words that the letter "D" can abbreviate. The slip somehow went astray, and the phrase "D or d" was misinterpreted as a single, run-together word: dord. (
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Rubicon is basically reaching a point of no return.
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I am just verifiying the surface condition in the SW Carr. and I found that in Roatan Island Pres is at 1008 and falling with 30KM winds from the East, the spot conside with a area of 850 vortex show in the latest map.
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An allusion is a figure of speech that makes a reference to, or representation of, a place, event, literary work, myth, or work of art, either directly or by implication. M.H. Abrams defined allusion as "a brief reference, explicit or indirect, to a person, place or event, or to another literary work or passage".[1] It is left to the reader or hearer to make the connection (Fowler); an overt allusion is a misnomer for what is simply a reference.

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Quoting Ossqss:


Ok, I have to get my Tyranothesaurus out way to much, but what does a river in italy have to do with this? :)

Link


LOL! It means to pass the point of no return
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Quoting GeoffreyWPB:
Drak...don't cross the Rubicon..:)


Ok, I have to get my Tyranothesaurus out way to much, but what does a river in italy have to do with this? :)

Link
Member Since: June 12, 2005 Posts: 6 Comments: 8185
Quoting GeoffreyWPB:
Drak...don't cross the Rubicon..:)


I didn't know we didn't know any allusions...
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Drak...don't cross the Rubicon..:)
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Quoting futuremet:


Drak, you use more complex diction than me. lol


Never.
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Quoting Drakoen:


It's a lot easier to communicate than when you use big diction.


Drak, you use more complex diction than me. lol
Member Since: July 19, 2008 Posts: 43 Comments: 4051
Quoting futuremet:


lol

It is not in agreement with other models.

>_<


It's a lot easier to communicate than when you use big diction.
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Quoting Patrap:
inharmonious

adjective

not harmonious; discordant, in conflict, etc.






lol

It is not in agreement with other models.

>_<
Member Since: July 19, 2008 Posts: 43 Comments: 4051
Vortex,

Thats what they said this morning, that it was low and look at all the pounding the western parts took today. Along with those of us in Downtown Ft. Lauderdale, high winds and heavy lightning.
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From today and for your use if needed and worth a peek :)

Browser security and privacy tips
Member Since: June 12, 2005 Posts: 6 Comments: 8185
ZCZC MIATWOAT ALL
TTAA00 KNHC DDHHMM
TROPICAL WEATHER OUTLOOK
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
800 PM EDT MON JUN 8 2009

FOR THE NORTH ATLANTIC...CARIBBEAN SEA AND THE GULF OF MEXICO...

TROPICAL CYCLONE FORMATION IS NOT EXPECTED DURING THE NEXT 48 HOURS.

$$
FORECASTER KIMBERLAIN/PASCH
NNNN



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487. beell
retention
Definition: memory
Synonyms: recall, recognition, recollection, remembrance, retentiveness
Member Since: Posts: Comments:

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About

Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.