| 1 | These glowing balls sometimes appear during thunderstorms. | |
| 2 | During the passage of a thunderstorm pressure has pronounced change. | |
| 3 | In the summer, thunderstorms or lightning may also cause flight delays. | |
| 4 | One afternoon while we were there at that lake a thunderstorm came up. | |
| 5 | By 4:15 p.m. Eastern Daylight Savings Time, the strongest thunderstorms were directly over Washington, D.C. |