A line of severe thunderstorms moved through Yellowstone Park between 4 and 5:15pm MDT on August 4th, and caused numerous downed trees down across the park. Reports of wind damage began shortly after 4pm, and continued through the early evening hours on the 4th. Initial reports included down trees in on the site of a wildfire named the Owl Fire, which is located in the Northwest corner of Wyoming. As the line of storms continued through the park, several visitor’s centers reported downed trees, road closures, and picnic site closures. Below are the list of Local Storm Reports (LSRs) corresponding to damage across the park.
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 0406 PM TSTM WND DMG NORRIS JCT 44.73N 110.70W 08/04/2007 PARK WY PARK/FOREST SRVC TREES DOWNED. POWER OUT IN AREA.
0406 PM TSTM WND DMG 2 N GRANT VILLAGE 44.42N 110.56W 08/04/2007 TETON WY PARK/FOREST SRVC REPORT OF TREES DOWN TOWARD WEST THUMB.
0407 PM TSTM WND DMG 1 SE CANYON 44.72N 110.48W 08/04/2007 PARK WY PARK/FOREST SRVC LARGE TREE DOWN ACROSS NORTH RIM DRIVE
0420 PM NON-TSTM WND DMG NORTHEAST ENTRANCE 44.98N 110.06W 08/04/2007 PARK WY PARK/FOREST SRVC 6 TREES DOWN
0400 PM TSTM WND DMG GRANT VILLAGE 44.39N 110.56W 08/04/2007 TETON WY PARK/FOREST SRVC APPROXIMATELY 12 TREES BLOWN DOWN ACROSS THE HIGHWAY BETWEEN GRANT VILLAGE AND THE SOUTH ENTRANCE TO YELLOWSTONE NATIONAL PARK. ESTIMATED 50-60 MPH WINDS AT GRANT VILLAGE PER THE PARK RANGER.
As a reference, a map of Yellowstone National Park is included below: