655
ACUS11 KWNS 271231
SWOMCD
SPC MCD 271230
MIZ000-WIZ000-271430-
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.
DISCUSSION...ACTIVITY OVER LAKE SUPERIOR HAS TENDED TO TAKE A MORE
SOUTHWARD MOTION OVER THE LAST HOUR. A VERY UNSTABLE, BUT CURRENTLY
CAPPED, AIRMASS IS SITUATED IN NORTHWEST WISCONSIN. CONTINUED
SURFACE HEATING MAY ALLOW LOW-LEVEL CLOUD COVER TO ABATE BY LATE
MORNING/EARLY AFTERNOON. SOME INTENSIFICATION OF ONGOING STORMS IS
POSSIBLE AS THIS PROCESS OCCURS. LARGE HAIL AND DAMAGING WINDS WOULD
BE THE MAIN HAZARDS. DEPENDING ON THE TIMING/TRACK OF THESE STORMS,
SOME EXTENSION IN TIME/AREA OF WW 518 MAY BE NEEDED LATER THIS
MORNING.
..WENDT.. 07/27/2026
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT
ATTN...WFO...MQT...GRB...DLH...
LAT...LON 47009109 47419087 47508983 46518820 45828766 45468793
45408918 47009109
MOST PROBABLE PEAK WIND GUST...55-70 MPH
MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN
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