nws-weather-forecast

nws-weather-forecast is a skill for Claude Code, Codex from runxhq/runx. It costs 28 tokens per session (1,068 once invoked), scanned A, original, Apache-2.0.

A read-only weather service that retrieves forecasts from the US National Weather Service. It can find the correct forecast grid for a latitude and longitude, then fetch forecast periods.

In plain words
What is it for?
It helps planning workflows obtain a US forecast for a place or known weather-service grid point.
Why use it?
It provides current public weather evidence without an API key and records where the forecast came from.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit It helps planning workflows obtain a US forecast for a place or known weather-service grid point.

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Install with agentmods
npx agentmods add skills/runxhq/runx/nws-weather-forecast
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 runxhq/runx --skill nws-weather-forecast
Clone the repo
git clone --depth 1 https://github.com/runxhq/runx

Made for: Claude Code, Codex.

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 nws-weather-forecast

README.md
[![agentmods](https://agentmods.dev/badge/skills/runxhq/runx/nws-weather-forecast/github.svg)](https://agentmods.dev/skills/runxhq/runx/nws-weather-forecast)
Your own site
<a href="https://agentmods.dev/skills/runxhq/runx/nws-weather-forecast"><img src="https://agentmods.dev/badge/skills/runxhq/runx/nws-weather-forecast/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 nws-weather-forecast

Your own site · 80×15
<a href="https://agentmods.dev/skills/runxhq/runx/nws-weather-forecast"><img src="https://agentmods.dev/badge/skills/runxhq/runx/nws-weather-forecast.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 28 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,068 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00028 $0.01068
Opus 5 $0.00014 $0.00534
Sonnet 5 $0.00006 $0.00214
Haiku 4.5 $0.00003 $0.00107

Measured 8d ago against content hash 382cdef84f66, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

nws-weather-forecast scanned grade A with 0 findings 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 8d 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/nws-weather-forecast/SKILL.md · 109 lines

How it starts

The opening of the file, as written. The whole thing — 109 lines — stays where its author put it; the contents beside it link to each section on GitHub.

NWS Weather Forecast

Fetch public National Weather Service forecast evidence through runx HTTP.

This is a branded provider skill for the canonical weather-forecast verb. It uses the governed HTTP front, not an ad hoc client: the receipt records the NWS endpoint, response status, graph step receipts, and the exact authority surface. No API key is required. The default runner fetches the actual NWS gridpoint forecast; the locate runner discovers the gridpoint for a latitude/longitude.

What this skill does

nws-weather-forecast makes read-only calls to api.weather.gov. The locate runner calls /points/{lat},{lon} to discover gridId, gridX, gridY, and forecast URLs. The default forecast runner calls /gridpoints/{office}/{grid_x},{grid_y}/forecast to fetch forecast periods. The output is provider evidence; use weather-forecast when an agent needs to normalize that evidence for a planning decision.

When to use this skill

  • You need real public weather evidence with no credentials.
  • A graph needs to prove a weather data read went through runx's governed HTTP path.
  • You have an NWS office/gridpoint and need the current public forecast.
  • You have latitude and longitude in the United States and need the NWS gridpoint before running the forecast path.

When not to use this skill

  • For locations outside NWS coverage. Return needs_input with the coverage limitation.
  • For emergency, medical, aviation, maritime, evacuation, or life-safety decisions.
  • To notify users, reschedule events, deploy changes, or mutate operations based on weather. Those actions need their own authority gate.
  • To call private networks, untrusted hosts, or non-NWS endpoints.

Procedure

  1. If the caller has only coordinates, run locate with lat and lon.
  2. Extract gridId, gridX, and gridY from the sealed locate output.
  3. Run the default forecast runner with office, grid_x, and grid_y.
  4. Confirm the HTTP status is 2xx and the response contains forecast periods.
  5. Preserve the NWS source URL, generated timestamp, gridpoint, and receipt refs.
  6. If an agent needs planning prose, pass the provider evidence to weather-forecast. Do not invent guidance inside this provider fetch.
  7. Return needs_input for malformed coordinates or gridpoints; return needs_more_evidence for NWS outages, missing periods, or stale data.

Read the full file on GitHub · 109 lines

Files

What ships with it

3 files 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. 8d ago First seen · 109 lines · 28 tokens per session scan A 382cdef84f66

Subscribe to this mod's changes

nws-weather-forecast is a skill published in the GitHub repository runxhq/runx (87 stars, last pushed 3d ago), licensed Apache-2.0. It adds 28 tokens to every session and 1,068 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.