183
ACUS11 KWNS 280447
SWOMCD
SPC MCD 280447
IAZ000-NEZ000-SDZ000-280615-
MESOSCALE DISCUSSION 1486
NWS STORM PREDICTION CENTER NORMAN OK
1147 PM CDT FRI JUN 27 2025
AREAS AFFECTED...SOUTHEAST SOUTH DAKOTA...NORTHEAST NEBRASKA AND
NORTHWEST IOWA
CONCERNING...SEVERE THUNDERSTORM WATCH 470...
VALID 280447Z - 280615Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 470
CONTINUES.
SUMMARY...THE THREAT FOR DAMAGING WINDS HAS LIKELY PEAKED ALREADY
AND THE STORMS MAY BEGIN A SLOW WEAKENING TREND THROUGH 06-07Z.
DISCUSSION...THE BOWING CLUSTER WITH A HISTORY OF SEVERE OUTFLOW
GUSTS UP TO 83 MPH IS NOW SHOWING THE INITIAL SIGNS OF WEAKENING.
AN INCREASE IN CONVECTIVE INHIBITION AND WEAKENING DEEP-LAYER
VERTICAL SHEAR WITH SOUTHEASTWARD EXTENT APPEAR TO BE CONTRIBUTING
TO WEAKENING OF THE CLUSTER, AS EVIDENCED BY LOWERING ECHO TOPS AND
A FINE LINE/OUTFLOW PROGRESSING AHEAD OF THE MAIN UPDRAFTS. THIS
WEAKENING TREND IS LIKELY TO CONTINUE AND THE STORMS SHOULD WEAKEN
BY 06-07Z, THOUGH ISOLATED STRONG-SEVERE OUTFLOW GUSTS MAY OCCUR IN
THE INTERIM.
..THOMPSON.. 06/28/2025
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT
ATTN...WFO...FSD...OAX...
LAT...LON 42399606 42519722 42769741 43399678 43239582 42729577
42399606
MOST PROBABLE PEAK WIND GUST...55-70 MPH
MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page