---
name: sg-weather-now
description: Provide Singapore weather nowcasts and advisories using official sources, absolute timestamps, and confidence labels.
jurisdiction: SG
review_due: 2026-05-27
author_name: Jagatees
author_github: https://github.com/Jagatees
---

# SG Weather Now

## Overview

Use this skill to answer Singapore weather-now requests for current conditions, short-range forecasts, and advisories.
It is for practical planning and awareness, not life-critical emergency command.

Read these references before running:
- `references/intake.md`
- `references/output-template.md`
- `references/source-map.md`
- `references/qa-checklist.md`
- `references/safety-assumptions.md`
- `references/review-contacts.md`
- `references/safety-evals.md`

## Workflow

### 1. Confirm request and scope

Capture or infer:
- Geography: Singapore-wide or area-specific (North/South/East/West/Central)
- Time horizon: now, next 2 hours, next 24 hours
- Output goal: commute planning, event planning, general awareness

If missing, default to: Singapore-wide, next 2 hours + next 24 hours, concise summary.

### 2. Safety and misuse triage

Record:
- Risk tier: `MEDIUM`
- Regulated domain: `No`
- Sensitive-period mode: `No` unless severe weather or public safety incident is active

Blocking behavior:
- Return `Refuse` for harmful/deceptive requests.
- Return `Input Required` if user demands hyperlocal precision beyond available official data.
- Return `Human Review Required` if user requests life-or-death operational guidance beyond published official advisories.
- If user indicates immediate danger, prioritize official emergency direction and avoid speculative guidance.

### 3. Gather sources with trust tiers

Use this order:
1. Tier 1 (primary): Meteorological Service Singapore (MSS) and NEA weather warning channels.
2. Tier 2: Official operator/government channels relaying weather impacts.
3. Tier 3: User/social posts only as weak signals; never a sole basis for warnings.

Verification rules:
- For rain/thunderstorm/flood-risk claims, prioritize MSS/NEA timestamped updates from:
  - `https://www.weather.gov.sg/weather-forecast-2hrnowcast/`
  - `https://www.weather.gov.sg/weather-forecast-24hrforecast/`
  - `https://www.weather.gov.sg/weather-warning/`
- If source timestamps conflict, report conflict and use latest official timestamp.
- If only non-official signals exist, mark `Low confidence` and `Verification pending`.

### 4. Produce weather-focused output

Follow `references/output-template.md`.
Include:
- Current snapshot
- Next 2-hour nowcast
- Next 24-hour outlook
- Active advisories/warnings
- Confidence label and source links for each section

Use absolute timestamps with Singapore time.

### 5. Apply QA and safety checks

Before finalizing:
- Run `references/qa-checklist.md`
- Avoid deterministic claims beyond official forecast windows
- Distinguish measured/issued data from interpretation
- Confirm every major section has a timestamp and at least one official source link
- Add caveat when conditions are rapidly changing

### 6. Return final response

Return concise actionable guidance with clear caveats.
If severe warning exists, place warning section first.

## Quality Bar

- Uses MSS/NEA as first sources for weather claims.
- All time-sensitive statements include absolute Singapore timestamps.
- Forecast horizons are explicit and not overstated.
- Warnings/advisories are clearly separated from interpretation.
- Confidence labels appear in each major section.

## Reusable prompts

- "Give me Singapore weather now and next 24 hours with official source links."
- "Summarize rain risk by SG region for the next 2 hours with confidence labels."
- "Show active weather advisories in Singapore and what they mean for commuting."