mcp · United States

nws-weather-mcp-server

Get US weather forecasts, active alerts, and current observations via the National Weather Service API. STDIO or Streamable HTTP.

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What's in it

Data offered docs-verified: 7-day forecast (12-hour periods) · hourly forecast (1-hour periods, with dewpoint and humidity) · active weather alerts (filterable by area, point, zone, event, severity, urgency, certainty, status) · alert lookup by ID, including superseded messages (~7-day retention) · national, state/territory and marine-region alert counts · current observations by coordinates or station ID · station observation history (~7 days) · nearby observation stations with distance and bearing · valid alert event type names · forecast-office narrative products (AFD, HWO, ZFP, SPS) · zone-level text forecasts
Coverage docs-verified: 50 US states and US territories; adjacent marine areas for alerts, and stations and observations near the coast · ~7 days for station observation history (NWS retention); forecasts and alerts are current or active
Resolution docs-verified: Forecast periods: 12-hour (default) or 1-hour (hourly: true); spatial resolution not stated in docs
Formats docs-verified: MCP stdio · MCP streamable HTTP
Access docs-verified: Free, zero-auth access (no API keys required) to NWS data; server licence Apache-2.0

Useful for

Use cases llm-inferred: US project flood-risk screening: check active alerts for a site point or its forecast zone · US construction weather-window planning using the 7-day and hourly forecast for site coordinates · Storm-event context for a US drainage review: station observation history from the nearest station (~7 days) · Capture forecast-office hazard narrative (HWO/AFD) text into US project risk notes
Audience llm-inferred: flood consultants (US projects) · hydrologists · drainage engineers · civils engineers (US projects) · environmental consultants (US projects)

Limitations

Constraints llm-inferred: US states and territories only; no UK or other non-US coverage · Marine coordinates get no point forecast (marine_forecast_unsupported); marine zone text forecasts vary by zone · Observation history limited to ~7 days; no totalCount for time windows · Superseded alerts retained ~7 days · ENTRY's auto-extracted OAuth note conflicts with the docs' zero-auth NWS access; OAuth in the docs refers to the framework's optional server auth · Public hosted endpoint is third-party; rate limits and uptime are not documented · No update frequency documented

Licence: Apache-2.0
Authentication: OAuth mentioned in README (auto-extracted)
GitHub stars: 1
Last commit: 16/10/2026
Last successful page check: 14/10/2026
Page health: healthy
Package: npm:@cyanheads/nws-weather-mcp-server
Verification: Not independently verified

Auto-extracted, unverified fields: tools, install, auth. Check upstream documentation.

Provenance & evidence

Daily discovery 2026-10-17: GitHub search; verified via GitHub API. Tools/install/auth auto-extracted from README.

Metadata observed 14/10/2026 · daily-2026-10-17 (github-search)