get_forecast
Retrieve weather forecasts for specific coordinates using latitude and longitude inputs to access current and upcoming conditions.
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| latitude | Yes | ||
| longitude | Yes |
Implementation Reference
- tools/weather_tools.py:21-44 (handler)The asynchronous handler function implementing the core logic of the 'get_forecast' tool. It retrieves weather forecast data from the NWS API using latitude and longitude, formats the first 5 periods, and returns a string summary.async def get_forecast(latitude: float, longitude: float) -> str: url = f"{NWS_API_BASE}/points/{latitude},{longitude}" data = await make_nws_request(url) if not data: return "Unable to fetch forecast data for this location." forecast_url = data["properties"]["forecast"] forecast_data = await make_nws_request(forecast_url) if not forecast_data: return "Unable to fetch detailed forecast." periods = forecast_data["properties"]["periods"] forecasts = [] for period in periods[:5]: forecast = f""" {period['name']}: Temperature: {period['temperature']}°{period['temperatureUnit']} Wind: {period['windSpeed']} {period['windDirection']} Forecast: {period['detailedForecast']} """ forecasts.append(forecast) return "\n---\n".join(forecasts)
- tools/weather_tools.py:20-20 (registration)The @mcp.tool() decorator registers the get_forecast function as an MCP tool, using its name as the tool identifier.@mcp.tool()
- utils/weather_utils.py:7-16 (helper)Utility function to make asynchronous HTTP requests to the NWS API, handling errors and headers. Called twice in the get_forecast handler.async def make_nws_request(url: str) -> dict[str, Any] | None: 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
- utils/weather_utils.py:4-4 (helper)Constants used by the get_forecast tool: base URL for NWS API and User-Agent header.NWS_API_BASE = "https://api.weather.gov"