National Weather Service Weather Forecast Office

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: