Part-time Windfinding Radars have routine periods when weather watch coverage is not available. This normally occurs, up to 4 times a day, for approximately 1.5 hours as shown in the table below. During these periods these radars will be engaged in tracking of high-level balloons for the measurement of winds in the upper atmosphere.
| UTC/GMT | 05:15 - 06:45 | 11:15 - 12:45 | 17:15* - 18:45 | 23:15 - 00:45 |
| Eastern Daylight Time | 04:15 - 05:45pm | 10:15 - 11:45pm | 04:15 - 05:45am | 10:15 - 11:45am |
| Eastern Standard Time | 03:15 - 04:45pm | 09:15 - 10:45pm | 03:15 - 04:45am | 09:15 - 10:45am |
| Central Daylight Time | 03:45 - 05:15pm | 09:45 - 11:15pm | 03:45 - 05:15am | 09:45 - 11:15am |
| Central Standard Time | 02:45 - 04:15pm | 08:45 - 10:15pm | 02:45 - 04:15am | 08:45 - 10:15am |
| Western Standard Time | 01:15 - 02:45pm | 07:15 - 08:45pm | *12:15 - 01:45am | 07:15 - 08:45am |
| * Note that the 17:15UTC flight is performed one hour earlier in WA | ||||
