Storm Prediction Center Mesoscale Discussion 1076

   Mesoscale Discussion 1076
   NWS Storm Prediction Center Norman OK
   0618 PM CDT Wed Jun 10 2026

   Areas affected...much of Michigan

   Concerning...Severe Thunderstorm Watch 306...

   Valid 102318Z - 110045Z

   The severe weather threat for Severe Thunderstorm Watch 306
   continues.

   SUMMARY...Damaging winds are expected to persist through the
   evening. A downstream watch may be needed.

   DISCUSSION...A mature squall line continues to move across Michigan
   this evening. An unstable airmass is present ahead of this line with
   2000 to 2500 J/kg MLCAPE (per SPC mesoanalysis). This line is
   appears to be becoming more outflow dominant through time as it
   moves east of the stronger mid-level flow. However, given the
   unstable environment, and some strengthening of the low-level jet
   this evening, this line of storms could continue east of Severe
   Thunderstorm Watch 306. If this line of storms appears to remain
   severe as it moves east, a downstream watch may be needed.
   Additionally, storm activity is being monitored in Gratiot County.
   If this storm continue to intensify, a downstream watch may be
   issued in the relatively short term.

   ..Bentley/Smith.. 06/10/2026

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

   ATTN...WFO...DTX...APX...IWX...GRR...

   LAT...LON   41978484 42248558 42818566 43428583 44148586 44708578
               44898495 44798410 44308360 44088297 43578262 43078263
               42518293 42198318 42018352 41928417 41978484 

   MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 90 MPH
   MOST PROBABLE PEAK WIND GUST...55-70 MPH
   MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN