Storm Chase 2009 - Day 10 Discussion

[nsrobins]

Cap 1 Covection 0

Not a good sign to see a decent cell like that get hammered. Perhaps we need the middle layers to cool a bit?

[Nick F]

It's all about Location, Location, Location.... :blush:

Wish they'd wipe their bloody window! Ah done now ...

Hopefully this new cell will do something! Cap maybe screwing this up for chasers who've converged here though.

[Muffelchen]

Radar presentation on this cell isn't too great either now.

It's late, I think I'll go to bed and check back in the morning.

Night night

[Nick F]

I dunno, looks a bit healthier this one on radar, with tops to 35,000ft and 1" hail. Could still evaporate but have a better feeling this has broken the cap.

[dave48]

Severe Thunderstorm Warning now.

Edited May 6, 2009 by dave48

[Mammatus]

Been away 5 minutes and return to this :blush: Looks like the heavens have opened...........

Is that flooding infront of the car?

[Nick F]

URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 247

NWS STORM PREDICTION CENTER NORMAN OK

545 PM CDT TUE MAY 5 2009

THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF

NORTH CENTRAL TEXAS

EFFECTIVE THIS TUESDAY AFTERNOON FROM 545 PM UNTIL MIDNIGHT CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 55 MILES WEST OF ABILENE

TEXAS TO 35 MILES EAST SOUTHEAST OF MINERAL WELLS TEXAS. FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU7).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH

AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR

THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS

AND POSSIBLE WARNINGS.

OTHER WATCH INFORMATION...CONTINUE...WW 245...WW 246...

DISCUSSION...ISOLATED SUPERCELL THUNDERSTORMS ARE EXPECTED TO

RAPIDLY DEVELOP LATE THIS AFTERNOON NEAR THE TRIPLE POINT OF A COLD

FRONT AND DRYLINE. EXTREME INSTABILITY AND FAVORABLE EFFECTIVE

SHEAR WILL PROMOTE ROTATING STORMS CAPABLE OF VERY LARGE HAIL AND

DAMAGING WINDS. TORNADOES WILL ALSO BE POSSIBLE IF STORMS AS LONG

AS STORMS CAN REMAIN DISCRETE THROUGH THE EVENING.

[Gorky]

That storm has a great couplet developing at higher scans so I'd say this could definately produce quite quickly.

[nsrobins]

Yep the resident Breckenridge cell has tightened up nicely in the last 5 minutes.

[Gorky]

Looking very good now with a hook echo clearly visible

[Nick F]

Yes, possible inflow notch or hook showing on radar:

seems to be deviating more SE aswell which will enhance SRH.

Team on the move now after it ...

[Sno' problem]

Looks like Steve got the placement spot-on.

[Mammatus]

I'm not quite sure what you mean by couplet Gorky. Could you please explain as I've never heard of this term/phrase used in Meteorology before? :blush:

Collins English Dictionary: Couplet n two successive lines of verse, usually rhyming and of the same metre. For instance "Humpty dumpty sat on a wall.

Humpty dumpty had a great fall."

Back to the chase....... The Live Streaming is fantastic. Great work NW.

[sammie]

I'm not quite sure what you mean by couplet Gorky. Could you please explain as I've never heard of this term/phrase used in Meteorology before? :blush:

Collins English Dictionary: Couplet n two successive lines of verse, usually rhyming and of the same metre. For instance "Humpty dumpty sat on a wall.

Humpty dumpty had a great fall."

Back to the chase....... The Live Streaming is fantastic. Great work NW.

Winds moving in opp directions very close together on the doppler part of the the radar scan, they indicate rotation. They are coupled together hence a couplet. I always think of two couples dancing to remember it.

Edited May 6, 2009 by sammie

[Gorky]

A couplet is an area of winds on a doppler radar velocity scan indicating winds travelling in opposite directions in very close proximity to each other. This would be represented by bright red and green colours next to each other on the radar. This is indicative of circulation in a storm

[Mammatus]

Winds moving in opp directions very close together on the doppler part of the the radar scan, they indicate rotation. They are coupled together hence a couplet. I always think of two couples dancing to remember it.

Thanks Sammie :blush:

Well spotted there Gorky and Nick........things seem to be happening rather quickly now. Great to see the hook appearing on the radar.....signs of a very unstable atmosphere/rotating cell with the prospects of a tube in the immediate future I suspect.

[sammie]

Thanks Sammie :blush:

Well spotted there Gorky and Nick........things seem to be happening rather quickly now. Great to see the hook appearing on the radar.....signs of a very unstable atmosphere/rotating cell with the prospects of a tube in the immediate future I suspect.

Yip I'm taking bets with a friend when the cell will be tornado warned.

Edited May 6, 2009 by sammie

[Sno' problem]

I cant load the NW webcam right now, but the storm seems to be building, so it may be that their sat link is being affected.

Anyone know where they are now, cos their movements havent been updated (for me at least).

[Nick F]

TVS showing on the latest scan on the storm, still got a good hook with rain free inflow area.

Sno'problem, think the team are following closely the storm ...

[Sno' problem]

Thanks Nick. Suddenly the feed is working, and the team have disembarked and are studying the sky behind them with camera's ready, so I assume things may kick-off soon.

Tell them to turn the camera round!!!

Edited May 6, 2009 by Sno' problem

[Gorky]

Funnel on this cam right now..

http://www.severestudios.com/cgi-bin/playe...abor&uid=40

Edit: Dissipated now

Edited May 6, 2009 by Gorky

[Sno' problem]

Funnel on this cam right now..

http://www.severestudios.com/cgi-bin/playe...abor&uid=40

Edit: Dissipated now

AAARRRGGHH, thanks anyway.

I think the NW team need to try and head SE slightly.

Edited May 6, 2009 by Sno' problem

[Nick F]

Chase terrain not ideal round there, lots of trees and getting a bit hilly going east ...

[John Hanrahan]

Hi Guys

Currently Grabbing some Lightning Shot of the Supercell as it moves away. For your Info We were in Breckenridge when the Storm went up above our heads and followed it South and East all the way, always under the Base and Wrapping rain curtains, it tried soooo many times, had numerous Funnels but could not produce a Tornado. Were with about 1,000 Chasers on this Storm, Currently just South of I20

Paul Sherman

[NL]

Evening all, havent contributed to the discussion this evening thought I'd like

to sit back and watch the streaming(for a change) as the signal has been pretty

strong throughout and ive enjoyed it immensely... The cell has been giving TVS

again a few moments back but collapsing quite readily now (down to 23,000 ft

from 42,000 in about 10 mins) still no confirmed tornado from this storm, certainly

looked like plenty of potential a couple of hours ago with great circulation, at least

a storm came as it looked like the lid was tight shut on any development occurring

at all even the SPC downgraded to slight but kept a 10% tornado risk.