NWUS55 KTFX 200657 LSRTFX Preliminary Local Storm Report National Weather Service Great Falls MT 1257 AM MDT Wed Aug 20 2025 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 1200 AM Tstm Wnd Gst 11 WSW Big Sandy 48.10N 110.33W 08/20/2025 E58 MPH Chouteau MT Public Big Sandy MT Mesonet. && $$ ML