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Category: Severe convection

Flash flooding in the Milwaukee metro area, and a hiker hospitalized after a lightning strike near Palmyra, Wisconsin

1-minute GOES-19 Infrared images (above) showed thunderstorms that produced very heavy rainfall across parts of the metro Milwaukee area from early in the evening on 09 August to the overnight hours on 10 August 2025 — which produced flash flooding at numerous locations. Hourly precipitation amounts included 2.02″ at Milwaukee International Airport... Read More

Mesoscale Convective Vortex helps to force the development of a Mesoscale Convective System over northwest South Dakota

5-minute CONUS Sector GOES-19 (GOES-East) Nighttime Microphysics RGB + daytime True Color images from the CSPP GeoSphere site (above) showed a remnant Mesoscale Convective Vortex (MCV) that migrated eastward from southeastern Montana to northwestern South Dakota — where it helped to force the rapid development of a slow-moving Mesoscale Convective System (MCS) during the afternoon... Read More