179 

ACUS11 KWNS 290946

SWOMCD

SPC MCD 290946 

SDZ000-NDZ000-291145-



Mesoscale Discussion 1375

NWS Storm Prediction Center Norman OK

0446 AM CDT Mon Jun 29 2026



Areas affected...from central South Dakota into southeast North

Dakota



Concerning...Severe potential...Severe Thunderstorm Watch likely 



Valid 290946Z - 291145Z



Probability of Watch Issuance...95 percent



SUMMARY...The threat for damaging winds over 80 mph and wind-driven

hail will spread northeastward out of central South Dakota into part

of northeast South Dakota and southeast North Dakota.



DISCUSSION...A severe cluster of storms over south-central SD has

produced several gusts over 80 mph along with hail over 2.00"

diameter. This system is expected to remain severe as it moves

northeastward this morning. The anchor supercell on the southern end

was previously moving almost due east, but recent radar trends

suggest the system is finally moving more northeastward, similar to

CAM guidance.



The moist and unstable air mass, lift within the theta-e advection

zone, and 50-60 kt deep-layer shear suggest the complex will remain

severe for several more hours.



..Jewell.. 06/29/2026



...Please see www.spc.noaa.gov for graphic product...



ATTN...WFO...FGF...FSD...ABR...BIS...UNR...



LAT...LON   43310069 43740059 44300075 46489882 46669790 46669721

            46329687 45669687 44919712 44019835 43609911 43370003

            43310069 



MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 90 MPH

MOST PROBABLE PEAK WIND GUST...75-90 MPH

MOST PROBABLE PEAK HAIL SIZE...1.50-2.50 IN