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