The file GWX.exe is located in a subfolder of C:\Windows\System32. Known file sizes on Windows 8/7/XP are 406,528 bytes (96% of all occurrences) or 392,704 bytes. There is an icon for this program on the taskbar next to the clock.
What Causes Thunder? Thunder is the sound of the air expanding around a lightning bolt. Air rapidly expands around a lightning bolt's path, creating an acoustic shock wave that is heard as thunder. Hail can accompany thunderstorms.
Thunderstorm and Lightning Safety Tips. A thunderstorm comes from rain-bearing clouds that also produce thunder and lightning. All thunderstorms produce lighting and therefore are dangerous. A thunderstorm is classified as a severe thunderstorm when it contains large (at least one inch) hail and/or winds of 58 MPH or greater. If you can hear thunder, you are close enough to be affected by lightning, which can strike up to 10 miles ahead of or trailing a storm.