# Check Japanese Weather with Official JMA Forecasts

Finding regional forecasts can require matching unfamiliar area codes and time periods. This skill guides your assistant through public JMA data without login credentials.

## Install

```bash
npx skillstore add tahodev/jma-weather
```

## Metadata

- Status: approved
- Slug: tahodev-jma-weather
- Skillstore revision: r1
- Version status: missing
- Tree hash: 26783fc2c85f778729f7a0fce0b5588125cf8f4de12d8a9f5fd720395273f459
- Author: tahodev
- GitHub username: tahodev
- License: MIT
- Repository: https://github.com/tahodev/kurashi-skill/tree/09cb7f9eac85f0c85633cce08328a1a57854a94f/jma-weather
- Ref: 7f17813fb6af1acc7d8fd3fb5f05480f5be52783
- Supported tools: Claude, Codex, Claude Code
- Audit status: complete
- Agent install advisory: allowed
- Manual install advisory: allowed
- Artifact signature: available
- Audit attestation: unavailable
- Human verification: not\_verified
- Risk factors: external\_commands, network, filesystem
- Quality score: 77
- Quality tier: bronze
- Public page: https://skillstore.pages.dev/skills/tahodev-jma-weather
- Manifest: https://skillstore.pages.dev/api/skills/tahodev-jma-weather/manifest

## Capabilities

- Find regional forecast office codes using JMA area definitions.
- Retrieve short-term weather, precipitation probabilities, and temperature forecasts.
- Read weekly precipitation probabilities and temperature ranges when available.
- Retrieve the regional textual forecast overview.
- Match forecast values to their time periods and include the JMA publication timestamp.
- Handle invalid area codes, timeouts, server errors, and malformed responses using documented guidance.

## Use Cases

- Review Weather Before Commuting: Check your regional forecast and precipitation probabilities for the relevant travel periods.
- Compare Weekend Destination Forecasts: Read available weekly forecasts for Japanese destinations, including temperature ranges and publication times.
- Prepare a Regional Weather Brief: Retrieve the JMA textual overview and report source values with matching time periods.

## Prompt Templates

### Check Tomorrow's Weather

```
What is tomorrow's forecast for Tokyo? Include available precipitation probabilities, temperatures, and the JMA publication time.
```

### Review Travel Time Periods

```
Check tomorrow's Osaka forecast for morning and evening travel. Match precipitation probabilities to available periods and include the JMA publication time.
```

### Compare Weekend Destinations

```
Compare available weekend forecasts for Sapporo and Naha. Include precipitation probabilities, temperature ranges, publication times, and any missing values.
```

### Verify Regional Forecast Data

```
Resolve [region] using JMA office codes. Compare short-term and weekly periods, preserve source values, and report unavailable data without guessing.
```

## Limitations

- Coverage is limited to Japanese forecast regions, not precise street-level conditions.
- Warnings, advisories, earthquakes, and tsunami information are outside this skill.
- Retrieval requires network access and curl; endpoint availability and response formats can change.
- The referenced shared response checklist is not included in the supplied skill package.

## Best Practices

- Confirm the forecast office code before requesting data.
- Match each value to its forecast period and include the JMA publication timestamp.
- Use a request timeout, limit retries, and reuse cached responses only when their age is clearly stated.

## Anti Patterns

- Use municipality codes directly where forecast office codes are required.
- Invent missing forecast values or present stale cached data as current.
- Use routine forecasts as substitutes for official severe weather warnings or emergency information.

## Security Audit

- Audited at: 2026-10-13T04:00:27.418\+00:00
- Summary: All 28 static findings are false positives involving Markdown formatting, public JMA HTTPS requests, a relative documentation link, or readable Japanese text. No evidence found of prompt injection, credential access, data exfiltration, unsafe command execution, or obfuscation. The referenced shared checklist is outside the supplied file set and was not evaluated.

## Stats

- Views: 0
- Downloads: 0
- Favorites: 0
- Popularity score: 0