804
ACUS11 KWNS 290345
SWOMCD
SPC MCD 290344
WIZ000-IAZ000-MNZ000-290545-
MESOSCALE DISCUSSION 1830
NWS STORM PREDICTION CENTER NORMAN OK
1044 PM CDT MON JUL 28 2025
AREAS AFFECTED...SOUTHEAST MINNESOTA...FAR NORTHEAST IOWA...WESTERN
WISCONSIN
CONCERNING...SEVERE THUNDERSTORM WATCH 553...555...
VALID 290344Z - 290545Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 553, 555
CONTINUES.
SUMMARY...ISOLATED DAMAGING WIND GUSTS WILL BE POSSIBLE OVER THE
NEXT FEW HOURS ACROSS PARTS OF SOUTHEAST MINNESOTA, FAR NORTHEAST
IOWA AND WESTERN WISCONSIN. ALTHOUGH A SEVERE THREAT WILL LIKELY
PERSIST, THE THREAT SHOULD BE TOO ISOLATED TO THE EAST OF THE
ONGOING WATCHES FOR NEW WATCH ISSUANCE.
DISCUSSION...THE LATEST HI-RESOLUTION RADAR IMAGERY FROM
MINNEAPOLIS, MINNESOTA SHOWS A WELL-DEVELOPED SEVERE LINE SEGMENT
FROM WESTERN WISCONSIN INTO SOUTHEAST MINNESOTA. THIS LINE IS
LOCATED ALONG THE NORTHEASTERN EDGE OF A MODERATELY UNSTABLE
AIRMASS, WHERE MLCAPE IS ESTIMATED BY THE RAP IN THE 1000 TO 2000
J/KG RANGE, AND SURFACE DEWPOINTS ARE IN THE LOWER 70S F. AN
ISOLATED WIND-DAMAGE THREAT MAY BE MAINTAINED WITH THE STRONGER
SEGMENTS WITHIN THE LINE, AS IT TRACKS SOUTH-SOUTHEASTWARD ALONG THE
INSTABILITY GRADIENT OVER THE NEXT COUPLE OF HOURS. THE LATEST RAP
SHOWS WEAKER INSTABILITY PRESENT OVER FAR NORTHEAST IOWA AND
SOUTHWEST WISCONSIN, SUGGESTING THAT THE LINE SHOULD GRADUALLY
WEAKEN AS IT MOVES FURTHER SOUTHEAST.
..BROYLES.. 07/29/2025
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT
ATTN...WFO...MKX...ARX...MPX...
LAT...LON 43149024 43679019 44319048 44789089 45239150 45319201
45049274 44639296 44069240 43229170 42779114 42829063
43149024
MOST PROBABLE PEAK WIND GUST...55-70 MPH
MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN
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