Mesoscale Discussion 1758 NWS Storm Prediction Center Norman OK 0730 AM CDT Mon Jul 27 2026 Areas affected...Western Upper Peninsula of Michigan...Northern Wisconsin Concerning...Severe Thunderstorm Watch 518... Valid 271230Z - 271430Z The severe weather threat for Severe Thunderstorm Watch 518 continues. SUMMARY...Some intensification of activity over Lake Superior/western Upper Peninsula of Michigan is possible as it moves southeast. Large hail and damaging winds remain possible into mid/late morning. Depending on the timing/track of these storms, some extension in time/area of WW 518 may be needed later this morning.