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Cliffy Windbag · June 25th, 2003, 09:45 AM

SB:

Great stuff, SB! A budding chaser, are you? [img]/images/graemlins/smile.gif[/img] Prepare to be bored: What you've got there is a big rain free base of a well organized supercell. The lowering you see is mostly comprised of scud bombs, which probably indicates the presence of cyclonic shear at the low levels of the storm (further confirmed by your report of east winds at the surface). The anvil cloud matter traveling west gives us 90 degrees of turning (winds at 500 millibars were out of the SW), or very strong directional shear. That's a good recipe for tornadoes. You're right, bro, that storm was showing signs of low level rotation (a mesocyclone). All those ragged scud and Fractus clouds were likely trying to coalesce into a wall cloud, which might have spelled trouble. I'd be interested to know where these pics were taken; I could look at yesterday's archived radar and storm reports to see if this cell actually produced a tornado.

I was near Sioux City, SD yesterday, and what a day it was! We got 11 tornadoes in total. During one sequence of occlusion and new downwind formation, three skinny tornadoes were on the ground, from the same meso, at once! What an incredible, rare sight that was. We also got a half-mile wide masher that moved dangerously close (just west, propagating SE thankfully) to Sioux City. That's three days in a row, almost in the same area, of hoses. This has turned out to be an amazing season. 40 tornadoes so far. That's usually what I see in five years of chasing! The weather gods have been kind to me, brutal to the local denizens.

Thanks, SB. Great shots! You should have given chase, bro! [img]/images/graemlins/supergrin.gif[/img]

June 25th, 2003, 09:45 AM	#4
Cliffy Windbag Emulating Nabakov Cliffy Windbag is offline Join Date: May 2003 Posts: 472 Rep Power: 8	Re: Some pics for Cliffy SB: Great stuff, SB! A budding chaser, are you? [img]/images/graemlins/smile.gif[/img] Prepare to be bored: What you've got there is a big rain free base of a well organized supercell. The lowering you see is mostly comprised of scud bombs, which probably indicates the presence of cyclonic shear at the low levels of the storm (further confirmed by your report of east winds at the surface). The anvil cloud matter traveling west gives us 90 degrees of turning (winds at 500 millibars were out of the SW), or very strong directional shear. That's a good recipe for tornadoes. You're right, bro, that storm was showing signs of low level rotation (a mesocyclone). All those ragged scud and Fractus clouds were likely trying to coalesce into a wall cloud, which might have spelled trouble. I'd be interested to know where these pics were taken; I could look at yesterday's archived radar and storm reports to see if this cell actually produced a tornado. I was near Sioux City, SD yesterday, and what a day it was! We got 11 tornadoes in total. During one sequence of occlusion and new downwind formation, three skinny tornadoes were on the ground, from the same meso, at once! What an incredible, rare sight that was. We also got a half-mile wide masher that moved dangerously close (just west, propagating SE thankfully) to Sioux City. That's three days in a row, almost in the same area, of hoses. This has turned out to be an amazing season. 40 tornadoes so far. That's usually what I see in five years of chasing! The weather gods have been kind to me, brutal to the local denizens. Thanks, SB. Great shots! You should have given chase, bro! [img]/images/graemlins/supergrin.gif[/img]