GetMergedForecast
Returns a time series based on a specified segment for available forecast versions.

The returned series contains the red segments, in this example based on a value segment [+6h->+12h] from each forecast.
Syntax
- GetMergedForcast(t,s)
Description
| # | Type | Description |
|---|---|---|
| 1 | t | Time series |
| 2 | s | Segment specification, see below |
A segment is defined by an offset and duration specification, for example '1d:1d' means offset is one day and length of segment is also one day. To analyse the quality of the the third day in a forecast you can use a segment specification '2d:1d`.
Examples
Uses the example data described here.
## = @GetMergedForecast(@t('.Temperature_forecast'),'8h:4h')
| Time (UTC) | Current | Result |
|---|---|---|
| 2025-11-06T03:00:00Z | 2.00 | nan |
| 2025-11-06T04:00:00Z | 2.00 | nan |
| 2025-11-06T05:00:00Z | 2.00 | nan |
| 2025-11-06T06:00:00Z | 2.00 | nan |
| 2025-11-06T07:00:00Z | 3.00 | 1.00 |
| 2025-11-06T08:00:00Z | 3.00 | 1.00 |
| 2025-11-06T09:00:00Z | 3.00 | 1.00 |
| 2025-11-06T10:00:00Z | 3.00 | 1.00 |
| 2025-11-06T11:00:00Z | 4.00 | 2.00 |
| 2025-11-06T12:00:00Z | 4.00 | 2.00 |
| 2025-11-06T13:00:00Z | 4.00 | 2.00 |
| 2025-11-06T14:00:00Z | 4.00 | 2.00 |
| 2025-11-06T15:00:00Z | 4.00 | 3.00 |
| 2025-11-06T16:00:00Z | 4.10 | 3.00 |
| 2025-11-06T17:00:00Z | 4.10 | 3.00 |
| 2025-11-06T18:00:00Z | 4.10 | 3.00 |
| 2025-11-06T19:00:00Z | 4.10 | 4.10 |
| 2025-11-06T20:00:00Z | 4.10 | 4.10 |
| 2025-11-06T21:00:00Z | 4.10 | 4.10 |
| 2025-11-06T22:00:00Z | 4.10 | 4.10 |
| 2025-11-06T23:00:00Z | 4.10 | nan |
| 2025-11-07T00:00:00Z | 4.00 | nan |
| 2025-11-07T01:00:00Z | 4.00 | nan |