7/10/08 NOW: ND/MB/SK/MN/SD

[Dave Holder]

Judging from the radar loop on weatheroffice.com, it looks as though a nice supercell has fired and is traveling eastward north of Yorkton, SK. That's pretty far north, so I'm not confident about the tornadic potential with possible moisture concerns.

It is severe warned, however, and looks pretty impressive on radar.

 

[Dave Holder]

Current obs in Yorkton are 73 over 55. Seems like a close enough spread...

I'd love to be on that right now!

 

[nickgrillo]

Tornado warning on the supercell about 35-40 miles northwest of Bismark, ND, which is showing some rotation in the past few low-level SRV scans and has rapidly intensified in the last half hour. Convection has fired along the sfc trof / convergence line in a relatively dry boundary layer. LCL heights, per RUC mesoanalysis, are >2000m AGL across much of the inflow sector. SBCAPE being a widespread >3000j/kg and 0-6km shear being +50kts across much of the warm sector will certainly favor a sustained supercell, but the dewpoint deficits should keep tornado potential to a minimum -- unless storm-scale influences can help lower cloud base.

 

[Dave Holder]

Tornado warning in the Kandahar, SK area, which is due north of Regina. Apparantly there has been a tornado reported with this cell by the RCMP.

Looks amazing on radar!

 

[davecarlsen]

Pat McCarthy is on the tornado-warned storm east of Weyburn and reporting a good wall cloud.

 

[Matt Chatelain]

The temp/dew point spreads have been much lower in the SE corner of SK than in ND this evening where the two impressive supercells have been occuring this evening north of Estevan, SK. Ruc analysis has approx 300m^2s^2 0-1km helicity as well as very good 0-3km helicity. It has been around 73 over 64 in Estevan this evening. Wouldn't be surprised at all to see some tornado reports up there north of the boarder. I know tornadovideos.net is up there again so we shall find out soon.