get_alerts
Retrieve timely weather alerts for any US state by entering its two-letter code, ensuring immediate updates on severe weather conditions.
Instructions
Get weather alerts for a US state.
Args:
state: Two-letter US state code (e.g. CA, NY)
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| state | Yes |
Implementation Reference
- weather.py:40-57 (handler)The main handler function for the 'get_alerts' tool, decorated with @mcp.tool() for registration. It fetches weather alerts for a given US state using the NWS API, formats them, and returns as a string.@mcp.tool() async def get_alerts(state: str) -> str: """Get weather alerts for a US state. Args: state: Two-letter US state code (e.g. CA, NY) """ url = f"{NWS_API_BASE}/alerts/active/area/{state}" data = await make_nws_request(url) if not data or "features" not in data: return "Unable to fetch alerts or no alerts found." if not data["features"]: return "No active alerts for this state." alerts = [format_alert(feature) for feature in data["features"]] return "\n---\n".join(alerts)
- weather.py:28-37 (helper)Helper function to format individual alert features into readable strings, used by get_alerts.def format_alert(feature: dict) -> str: """Format an alert feature into a readable string.""" props = feature["properties"] return f""" Event: {props.get('event', 'Unknown')} Area: {props.get('areaDesc', 'Unknown')} Severity: {props.get('severity', 'Unknown')} Description: {props.get('description', 'No description available')} Instructions: {props.get('instruction', 'No specific instructions provided')} """
- weather.py:14-26 (helper)Helper function to make HTTP requests to the NWS API, used by get_alerts for fetching data.async def make_nws_request(url: str) -> dict[str, Any] | None: """Make a request to the NWS API with proper error handling.""" headers = { "User-Agent": USER_AGENT, "Accept": "application/geo+json" } async with httpx.AsyncClient() as client: try: response = await client.get(url, headers=headers, timeout=30.0) response.raise_for_status() return response.json() except Exception: return None
- weather.py:40-40 (registration)The @mcp.tool() decorator registers the get_alerts function as a tool in the FastMCP server.@mcp.tool()
- weather.py:42-46 (schema)Docstring defining the input schema: state as two-letter US state code."""Get weather alerts for a US state. Args: state: Two-letter US state code (e.g. CA, NY) """