Click on "Deploy Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type @ followed by the MCP server name and your instructions, e.g., "@Weather MCP Server what's the forecast for 38.9, -77.0?"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
A Model Context Protocol (MCP) server that provides weather forecasts and alerts for US locations using the National Weather Service (NWS) API.
Weather Alerts — Retrieve active NWS weather alerts for any US state
Weather Forecast — Get a detailed forecast for any US location by latitude/longitude
Weather Briefing Prompt — A pre-built prompt that combines alerts and forecast into a comprehensive briefing
Related MCP server: Weather MCP Server
Node.js v18 or later
An MCP-compatible client (e.g. Claude Desktop)
Note: The NWS API only supports locations within the United States.
npm install
npm run buildRun the server directly via stdio (the standard MCP transport):
node build/index.jsOr use the weather bin alias after a global/local install:
npx weatherAdd the following to your claude_desktop_config.json:
{
"mcpServers": {
"weather": {
"command": "node",
"args": ["/absolute/path/to/mcp-poc/build/index.js"]
}
}
}get_alertsRetrieves active weather alerts for a US state.
Parameter | Type | Description |
| string | Two-letter state code (e.g. |
get_forecastRetrieves the weather forecast for a specific US location.
Parameter | Type | Description |
| number | Latitude of the location (-90–90) |
| number | Longitude of the location (-180–180) |
weather-briefingGenerates a comprehensive weather briefing for a US state.
Argument | Type | Description |
| string | Two-letter US state code (e.g. |
| string | Latitude of a location within the state for the forecast |
| string | Longitude of a location within the state for the forecast |
# Build TypeScript
npm run build
# Source files
src/index.ts # MCP server, tools, and prompts
src/helpers.ts # NWS API client and shared typesISC
Get weather alerts for a state
Inputs: state (required).
Get weather forecast for a location
Inputs: latitude (required), longitude (required).
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
Loading tool schema changelog…
Scored across 2 tools
The two tools serve completely distinct purposes: one for weather alerts and one for forecasts, making misselection unlikely.
Both tools follow the consistent verb_noun pattern using snake_case: get_alerts and get_forecast.
With only 2 tools, the server feels thin; weather services typically benefit from additional tools like current conditions or hourly forecasts.
The set covers alerts and forecasts but misses common weather operations such as current conditions, historical data, or location search.
Official NWS forecasts and alerts, as one MCP tool through Apify
US NWS weather alerts and 5-day forecasts for AI agents. $0.01 per call.
Get US weather forecasts, active and recent alerts, and current observations.
Hosted MCP server for Xweather weather data: conditions, forecasts, alerts, and more.