# Filter reviews

Each filter has one review file (`01`–`12`) holding its findings, links to its
decisions, and its task checklist. [00-cross-filter.md](00-cross-filter.md)
holds findings that affect more than one filter. Review status is tracked in
[pipeline-plan.md](../pipeline-plan.md) §6, and every review follows the
checklist in §5.

## Conventions

- Each finding lives in exactly one review file. The other filter reviews it
  affects link to it and record only how it applied to them.
- Findings keep one number across all review files. A new finding takes the
  next number (27 as of 2026-09-15) wherever it is filed, and is added to the
  index below.
- A finding that turns out to affect other filters moves to `00`, leaving a
  link behind.
- A resolved finding stays where it is, with its resolution in italics.
- A finding accepted as a limitation becomes a caveat in
  [filter-calculations.md](../filter-calculations.md).

## Finding index

Status is kept in each finding, not here.

| # | Finding | File |
| --- | --- | --- |
| 1 | Annual temperature weights months equally | [02](02-annual-avg-temperature.md) |
| 2 | Base NOAA aggregation is not area-weighted | [00](00-cross-filter.md) |
| 3 | Partial precipitation years are accepted | [06](06-annual-precipitation.md) |
| 4 | The Köppen fallback can create false data | [01](01-koppen.md) |
| 5 | Extreme-day counts are not completeness-normalized | [04](04-extreme-temperature-days.md) |
| 6 | The absolute-extreme metric depends on unrelated percentile thresholds | [04](04-extreme-temperature-days.md) |
| 7 | Heat Index days are a daily-extrema proxy | [05](05-heat-index-days.md) |
| 8 | Heat-year completeness is permissive | [05](05-heat-index-days.md) |
| 9 | The GHI formula assumes hourly, 365-day input | [11](11-solar-ghi.md) |
| 10 | Clear-sky reduction averages ratios rather than energy totals | [12](12-clear-sky-ghi-reduction.md) |
| 11 | Spatial weighting is inconsistent across metric families | [00](00-cross-filter.md) |
| 12 | Alaska and Hawaii are not covered by the NOAA and gridMET sources | [00](00-cross-filter.md) |
| 13 | Lexington, VA (51678) is missing from the NOAA daily county files | [00](00-cross-filter.md) |
| 14 | Helper functions are duplicated across scripts | [00](00-cross-filter.md) |
| 15 | The app's source text for three NOAA metrics names the wrong product | [00](00-cross-filter.md) |
| 16 | Source links point to retired or missing pages | [00](00-cross-filter.md) |
| 17 | The data-sources metric list is out of date | [00](00-cross-filter.md) |
| 18 | The data-sources doc describes the retired locally extreme metric | [04](04-extreme-temperature-days.md) |
| 19 | The data-sources doc recommends a GHI raster the pipeline does not use | [11](11-solar-ghi.md) |
| 20 | The base build labels any solar CSV as representative-point | [11](11-solar-ghi.md) |
| 21 | The documented Köppen labels differ from the app | [01](01-koppen.md) |
| 22 | The base build's docstring calls its Köppen value a majority class | [01](01-koppen.md) |
| 23 | The metric files and `metric_sources.json` were not in git | [00](00-cross-filter.md) |
| 24 | The data-sources doc does not cover several pipeline steps | [00](00-cross-filter.md) |
| 25 | Wettest and driest month are computed in two places | [00](00-cross-filter.md) |
| 26 | Solar GHI is finalized by the extreme-temperature apply step | [00](00-cross-filter.md) |