REPRODUCIBLE WORK
Follow the evidence in the order it becomes usable.
Resolve point
/points/{latitude},{longitude}
Issuing office, grid coordinates, zones, and linked endpointsFollow hourly link
forecastHourly property
Seven-day hourly forecast endpointCheck alerts
/alerts/active with the relevant area or zone
Separate hazard evidenceRefresh lineage
Recheck /points periodically
Avoid stale office/grid mappingSOURCE SNAPSHOT
Anchor the evidence to its source and time.
INPUT AND EVIDENCE LEDGER
Keep the snapshot attached to its origin.
| Field | Value | Origin |
|---|---|---|
| Starting input | Latitude and longitude | User or water geometry |
| Grid resolution | About 2.5 km × 2.5 km | NWS documentation |
| Hourly horizon | Next seven days | NWS documentation |
| Grid stability | Office/grid mapping can occasionally change | NWS documentation |
DECISION READING
What survives the timeline check.
Caching the forecast without its point-to-grid lineage can attach weather to the wrong place after a mapping change. FINVECTOR should retain coordinates, office, grid X/Y, generated time, forecast update time, and alert query separately.
SENSITIVITY
Where the chain can go stale.
- A water spanning several grid cells can need more than one point.
- Coastal marine locations may require raw grid data.
- Forecast age and active alerts should affect trip screening differently.
BOUNDARIES
Do not extend the timestamp into a promise.
- A 2.5 km grid does not reproduce conditions at every access point.
- Forecasts and alerts update after the cited documentation review.
- Weather data does not establish safe access or water conditions.
HUMAN ACCOUNTABILITY + AI USE RECORD
The owner is accountable; the technical checks were AI-assisted.
The TOOOLBOX site owner authorized the publication scope and remains the correction contact. AI assistance was used for drafting, implementation, arithmetic recomputation, and source-link checks. This record does not claim line-by-line human fact-checking or licensed professional review.
- Record ID
- TB-FINVECTOR-24-20260902
- Owner role
- TOOOLBOX site owner and developer
- Technical check date
- 2026-09-02
- Human fact-check
- No separate human fact-check recorded
- AI use
- Drafting, code, arithmetic, and link checks
- Correction channel
- Public contact page
- Matched every endpoint role to the NWS linked-data instructions.
- Separated forecast lineage from the active-alert request.
- Added a refresh requirement for office/grid mappings that can change.
MORE FINVECTOR DECISION NOTES
Test the result yourself.
This note preserves a dated calculation. Change the inputs in the live workspace, or compare another evidence pattern below. Live source availability and results can differ from the dated example.