noaa-weather

noaa-weather is a skill for Claude Code from Outsharp/shipp-skills. It costs 61 tokens per session (3,643 once invoked), scanned A, original, Apache-2.0.

A programming interface for official United States weather data from the National Weather Service. It provides forecasts, warnings, observations, radar data, and geographic forecast information without requiring an API key.

In plain words
What is it for?
Fetching United States forecasts, active alerts, station observations, radar information, and weather-zone or grid data.
Why use it?
It lets an application retrieve public weather information directly instead of collecting it manually. The service requires a User-Agent header to identify the application.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Good fit Fetching United States forecasts, active alerts, station observations, radar information, and weather-zone or grid data.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/outsharp/shipp-skills/noaa-weather
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add Outsharp/shipp-skills --skill noaa-weather
Clone the repo
git clone --depth 1 https://github.com/Outsharp/shipp-skills

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for noaa-weather

README.md
[![agentmods](https://agentmods.dev/badge/skills/outsharp/shipp-skills/noaa-weather/github.svg)](https://agentmods.dev/skills/outsharp/shipp-skills/noaa-weather)
Your own site
<a href="https://agentmods.dev/skills/outsharp/shipp-skills/noaa-weather"><img src="https://agentmods.dev/badge/skills/outsharp/shipp-skills/noaa-weather/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for noaa-weather

Your own site · 80×15
<a href="https://agentmods.dev/skills/outsharp/shipp-skills/noaa-weather"><img src="https://agentmods.dev/badge/skills/outsharp/shipp-skills/noaa-weather.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 61 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,643 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00061 $0.03643
Opus 5 $0.00030 $0.01821
Sonnet 5 $0.00012 $0.00729
Haiku 4.5 $0.00006 $0.00364

Measured 9d ago against content hash 32584b3c00ca, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

noaa-weather scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- Any HTTP client (curl, wget, fetch, requests, etc.)
skills/noaa-weather/SKILL.md · 396 lines

How it starts

The opening of the file, as written. The whole thing — 396 lines — stays where its author put it; the contents beside it link to each section on GitHub.

NOAA Weather.gov API

The National Weather Service (NWS) API provides free, open access to weather forecasts, alerts, observations, radar data, and more for the United States. All data is public domain — no API key or account required.

Always check the official API documentation and OpenAPI spec for the latest endpoint details.


Base URL

https://api.weather.gov

Authentication

No API key is needed. However, a User-Agent header is required on every request to identify your application.

User-Agent: (myweatherapp.com, [email protected])

The string can be anything — the more unique to your application, the less likely it will be affected by a security event. Requests without a User-Agent may be blocked.


Key Concepts

Term Description
Point A latitude/longitude coordinate. Use /points/{lat},{lon} to resolve it to grid and zone info.
Gridpoint A 2.5km forecast grid cell identified by a WFO office ID and x,y coordinates.
WFO Weather Forecast Office — the NWS office responsible for a geographic area (e.g., DEN, OKX, LOT).
Zone A geographic area used for forecasts and alerts. Types include land, marine, forecast, fire, county.
Station An observation station (e.g., KDEN for Denver International Airport) that reports current conditions.
Alert A weather warning, watch, or advisory issued by the NWS (e.g., tornado warning, winter storm watch).
SIGMET/AIRMET Aviation weather advisories for significant or airmen's meteorological conditions.
TAF Terminal Aerodrome Forecast — aviation weather forecast for an airport.
GeoJSON The default response format — standard JSON with geographic feature geometry.

Core Workflow: Get a Forecast for a Location

Read the full file on GitHub · 396 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 9d ago First seen · 396 lines · 61 tokens per session scan A 32584b3c00ca

Subscribe to this mod's changes

noaa-weather is a skill published in the GitHub repository Outsharp/shipp-skills (4 stars, last pushed 5mo ago), licensed Apache-2.0. It adds 61 tokens to every session and 3,643 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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