SPC MD 1057

MD 1057 CONCERNING TORNADO AND SEVERE THUNDERSTORM WATCHES 297...298... FOR PORTIONS OF THE EASTERN DAKOTAS AND WESTERN MINNESOTA Mesoscale Discussion 1057 NWS Storm Prediction Center Norman OK 1119 PM CDT Tue Jun 09 2026 Areas affected...portions of the eastern Dakotas and western Minnesota Concerning...Tornado and Severe Thunderstorm Watches 297...298... Valid 100419Z - 100615Z The severe weather threat for Tornado and Severe Thunderstorm Watches 297, 298 continues. SUMMARY...Damaging wind potential continues within WW297 and 298. DISCUSSION...A squall line continues eastward across the eastern Dakotas into Minnesota, with 60-75 mph gusts observed in the last hour. Two areas of this line have shown an increase in damaging wind potential over the last hour. The line in northeastern South Dakota outside of Aberdeen has recently produced gusts to 75-77 mph, with a bowing segment becoming apparent. This area will be a focus of severe to significant severe wind potential (70-80 mph) given the favorably strong instability downstream. Further north across northern North Dakota, the northern segment of the squall line has become more progressive. The VAD profile from MVX shows an increase in the low-level jet, with 50-60 kt southerly flow in the lowest 1-2 km. This area may also develop as a more favorable corridor for severe wind potential in the short term given the increase in the LLJ and favorably warm and unstable environment downstream. ..Thornton.. 06/10/2026 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...MPX...FGF...FSD...ABR...BIS... LAT...LON 47559915 48209906 48779913 49089883 49009735 48829679 48279628 47379603 46269601 45499616 44959624 44599657 44369711 44089802 43909898 44259927 44599945 45139953 47559915 MOST PROBABLE PEAK TORNADO INTENSITY...85-110 MPH MOST PROBABLE PEAK WIND GUST...65-80 MPH MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN Read more