Storm Australian Severe Weather Forum

Severe Weather Discussion => Tornado Alley Outbreaks and Severe Weather Worldwide => Topic started by: Jimmy Deguara on 25 April 2006, 08:19:43 AM

Title: US trip 2006 - April 23 2006 Severe weather northern Texas Oklahoma and Kansas
Post by: Jimmy Deguara on 25 April 2006, 08:19:43 AM

Hi,

With CAPE values of the order of 2500 to 3000J/kg, great wind shear and a dryline intersecting boundaries and a cold front, severe storms and tornadoes are possible. In fact at the least, very large hail should occur given the extreme lapse rates and dry air aloft. The only negatives are high cloud or if the cold front surges.

We'll see what happens from here.

Regards,

Jimmy Deguara

Title: Re: US trip 2006 - April 23 2006 Sever weather northerTexas Oklahoma and Kansas
Post by: David C on 26 April 2006, 03:59:17 AM

Currently a very nice supercell that developed on the dryline moving east into an area of backed low level flow and now heading generally towards Chickasha. Severe warned now with golfball hail however I was expecting this storm to be tornado warned however definitely looking linear in recent frames.

EDIT  Further north, HP heading towards Tulsa is now tornado warned.

Title: Re: US trip 2006 - April 23 2006 Sever weather northerTexas Oklahoma and Kansas
Post by: Jimmy Deguara on 27 April 2006, 01:34:03 AM

Hi guys,

It seemed luck had to be more on your side than pure strategy on this day. As David hinted, two isolated storms of interest developed in SW Oklahoma and tapped into moisture further east. The storm near Chickache looked excellent and had a wall cloud when we neared but it dumped rain and became more HP. Meanwhile a storm developed well to the north near El Rino and before you knew it produced a tornado and then another tornado. Another cell from near Lawton moved east and gradually produced a nice hook! This hook lasted near 3 hours and also produced a clear slot with atomised rain! We saw no tornado!

Another storm near the Red River produced a stove pipe tornado at dusk - in all the tornado lasted 20 minutes! Bad luck huh - we had 4 main storms and we chose the 2 that did not tornado coincidently. The long lived supercell lasted well into the night but did not seem to want to do anything even after another attempt - just a wall cloud.

Oh well - SW Texas is the next stop.

Regards,

Jimmy Deguara

Title: Re: US trip 2006 - April 23 2006 Severe weather northern Texas Oklahoma and Kansas
Post by: Jimmy Deguara on 18 May 2006, 06:14:18 PM

Hi,

The photographs for this event are here:

http://www.australiasevereweather.com/photography/photos/new/jd20060505.html

Earlier supercell wall cloud

(http://www.australiasevereweather.com/photography/photos/2006/0424jd04.jpg)

This supercell was ready to produce a tornado but we did not see any.. the wall cloud and rotation with hook echo persisted for 3 hours!
(http://www.australiasevereweather.com/photography/photos/2006/0424jd07.jpg)

Regards,

Jimmy Deguara