Australian Severe Weather Forum

All I can say is - what a day! We intercepted the first two interesting storms in northern Wyoming near Gillette. We let the first storm go once we saw the impressive structure of the second storm. But this became embedded within the rain. Lightning at most times was very frequent.

We headed east and once again intercepted this storm SW of Upton Wyoming. Not only was it HP in structure, it also had inflow. However, despite its impressive structure as it approached, it rapidly transformed into a tornadic producing structure with strong inflow. In fact, a curved band of very large cumulus developed within the strong inflow environment extended out to the northeast. Rotation exhibited by this storm was quite significant during this phase of strong inflow.

We decided to remain with the storm to head back to town. Lightning from the vault was quite frequent and typical of active HP supercells. Finally we decided to enter the storm carefully via the inflow notch given the lack of road choices and good escape routes. What we saw within the mesocyclone and hook circulation were rapidily spinning vorticies - some forming into funnels - we observed and filmed at least 2 significant funnels. Things were changing very fast and then the RFD with hail pelted our view as the storm ventured east - no roads. The storm though at this point was in a weakening phase and the tornado warning was allowed to expire.

Apologies for the many photographs that were repeated here but I am trying to get some response on what others think. I have not viewed the video as yet PAL/NTSC issues and I have no time to edit on my computer

SW of Gillette


SW of Upton
http://www.australiasevereweather.com/photography/photos/2006/0609jd30.jpg

http://www.australiasevereweather.com/photography/photos/2006/0609jd36.jpg



Good structure kicks in rapidly!

http://www.australiasevereweather.com/photography/photos/2006/0609jd41.jpg

http://www.australiasevereweather.com/photography/photos/2006/0609jd45.jpg







http://www.australiasevereweather.com/photography/photos/2006/0609jd49.jpg
 
http://www.australiasevereweather.com/photography/photos/2006/0609jd50.jpg





within the core - south of Upton - a few miles on major road to Newcastle:

http://www.australiasevereweather.com/photography/photos/2006/0609jd55.jpg

http://www.australiasevereweather.com/photography/photos/2006/0609jd56.jpg

http://www.australiasevereweather.com/photography/photos/2006/0609jd57.jpg

http://www.australiasevereweather.com/photography/photos/2006/0609jd59.jpg



Regards,

Jimmy Deguara

G'day Jimmy!

Finally got back this week and thought i'd reply for once! ;-)

This is a nice looking supercell. The second wall cloud in the lower photos is very low. Was there any tornado reports from others?

Regards Jeff.

Welcome back Jeff.

Based on the incredible inflow and the carving out of the meso, this was very close if not having produced. Roger Edwards commented on seeing a possible tornado - I have submitted the photographs in the hope of getting feedback on this issue. I will have to review footage - very hard on a view finder but it was an impressive storm!

Regards,

Jimmy Deguara

all the photos for the 9th are here:

http://australiasevereweather.com/photography/photos/new/jd2006061302.html

http://australiasevereweather.com/photography/photos/new/jd2006061303.html

http://australiasevereweather.com/photography/photos/new/jd2006061304.html

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