Last updated: March 6, 2026
Data maintenance
Use Download, Recalculate Summaries, Import Data…, and Export Data… to keep station history complete and portable.
- On iOS, open the Data Download sheet from Observations.
- On macOS, use the Data menu for download/recalculate and the File menu for import/export.
Choose the right action
| Action | Use it when | Result |
|---|---|---|
| Download observations | Data looks stale or periods are missing | Fetches latest and missing history when supported |
| Recalculate Summaries | Summary values look out of sync | Rebuilds day/month/year summary rows from stored observations |
| Export Data… | You want a backup or transfer file | Creates a .wfdb package for the current station |
| Import Data… | You want to restore or merge data | Adds only rows not already stored for the same station |
Download observations
Weather Fusion downloads automatically.
Use manual Download when data looks stale or incomplete.
Recalculate summaries
Use Recalculate Summaries to rebuild summary values from stored observations.
Use this after large imports or backfills when summaries need to catch up.
Export and import
Use Export Data… to create a .wfdb backup of the current station.
Use Import Data… to restore or merge from a .wfdb file.
- New rows are added when the file matches the current station and contains data not already stored.
- Import is rejected when the file belongs to a different station.
- Import can finish with Data imported successfully, No Data Imported, or an error.
Import is non-destructive: existing rows remain unchanged.
Open .wfdb from Finder on macOS
You can also open a .wfdb package directly from Finder. Weather Fusion queues the file and starts import when import preconditions are satisfied.
Import starts only when:
- A station is currently selected.
- Demo Mode is off.
- No historical download is running.
- Summary recalculation is not running.
- Another import is not already in progress.
Why you may see No Data Imported
- The file contains no rows newer than local rows.
- The same station/range was already imported.
Progress and duration
Large downloads, imports, and recalculations can take longer on deep history.
Run one maintenance action at a time for predictable results.
If results are unexpected, see Troubleshooting.