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nsrobins

Chase Day 42 Discussion - W SD into WY and MT

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I don't think you're far off the right area today with a shift North into W central SD or maybe over into far NE WY.

The highlight of the parameters has to be directional shear, with it maxed out at 180deg between the surface and 700mb according to the hodo near Newell, SD at 22Z. Yes weakfish flow at the surface but pretty decent at 500mb which probably accounts for the concern in a fast-moving bow/derecho later with attendant damaging winds.
Tornado chances fairly decent early on IMO in target area (Spearfish/Newell SD) and HRRR pops up a cell at 21Z near to Devil's Tower, WY

 

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Powder keg instability in target area. Meso shows nearly 3500 max CAPE over Gillette, WY and effective shear up to 60kn.
I would expect cells to explode over the far NE WY in next half hour and grow upscale later into a mean beast of a bowing MCS.

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The Volborg cell SE of Montana has just become T warned just as as Don murray has gone offline,our netweather team also offline :(

 

will Stormscapelive.tv come online?

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not many chasers tonight on tvn with a MDT 

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not many chasers tonight on tvn with a MDT 

The MDT was raised for enhanced winds, in association with the bowing MCS that is currently racing across north IA and MN. 90mph+ wind gusts being reported.

Not all categorical risks are for tornados.

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The MDT was raised for enhanced winds, in association with the bowing MCS that is currently racing across north IA and MN. 90mph+ wind gusts being reported.

Not all categorical risks are for tornados.

yes i knew that mate i just thought there would be more chasers out

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Just a quick Picture, most chasers dived south to the 2nd Tornado warned storm near Spearfish but we persevered with the machine and took Highway 212 east out of Belle Fourche and were rewarded with the mile wide wedge which we sent a picture to NWS Rapid City for there verification and damage path and time stamp.

 

857pm 6 miles NW Of Hereford - A great Catch

 

post-24-0-28274200-1434872832_thumb.jpg

 

 

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Spc posted your report which was 1 of two reported in ND yesterday, good for you.

Largest hail in ND reported was 1,75" with 2.5" the largest of the day.

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