se_current_weather

Get current weather data for Swedish locations using SMHI, including temperature, wind, precipitation, and humidity.

Instructions

Get current weather for a location in Sweden using SMHI (Swedish Meteorological and Hydrological Institute). Includes temperature, wind, precipitation, humidity.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`location`	Yes	Swedish city name (e.g. 'Stockholm', 'Malmö', 'Gothenburg', 'Kiruna') or lat,lon coordinates

Implementation Reference

src/servers/swedish-weather.js:113-155 (handler)

The handler function that executes the logic for 'se_current_weather' by fetching location data and forecasting weather from SMHI.

async ({ location }) => {
  try {
    const loc = await getLocation(location);
    const data = await fetchForecast(loc.lat, loc.lon);
    const ts = data.timeSeries;
    if (!ts?.length) throw new Error("No forecast data");

    // Find the entry closest to now
    const now = Date.now();
    let closest = ts[0];
    let minDiff = Math.abs(new Date(ts[0].validTime).getTime() - now);
    for (const entry of ts.slice(1, 10)) {
      const diff = Math.abs(new Date(entry.validTime).getTime() - now);
      if (diff < minDiff) { closest = entry; minDiff = diff; }
    }

    const p = closest.parameters;
    const temp = getParam(p, "t");
    const wind = getParam(p, "ws");
    const gust = getParam(p, "gust");
    const windDir = getParam(p, "wd");
    const humidity = getParam(p, "r");
    const pressure = getParam(p, "msl");
    const cloud = getParam(p, "tcc_mean");
    const wsymb = getParam(p, "Wsymb2");
    const precip = getParam(p, "pmean");

    const lines = [
      `## ${loc.name} — Current Weather`,
      `**Conditions:** ${WSYMB2[wsymb] || `Code ${wsymb}`}`,
      `**Temperature:** ${temp}°C`,
      `**Humidity:** ${humidity}%`,
      `**Wind:** ${wind} m/s from ${windDir}° (gusts ${gust} m/s)`,
      `**Pressure:** ${pressure} hPa`,
      `**Cloud cover:** ${cloud != null ? Math.round(cloud * 12.5) + "%" : "N/A"}`,
      precip != null ? `**Precipitation:** ${precip} mm/h` : null,
      `\n*SMHI — ${closest.validTime}*`,
    ].filter(Boolean);

    return { content: [{ type: "text", text: lines.join("\n") }] };
  } catch (err) {
    return { content: [{ type: "text", text: `Error: ${err.message}` }], isError: true };
  }

src/servers/swedish-weather.js:107-112 (registration)

The registration of the 'se_current_weather' tool along with its schema and description.

server.tool(
  "se_current_weather",
  "Get current weather for a location in Sweden using SMHI (Swedish Meteorological and Hydrological Institute). Includes temperature, wind, precipitation, humidity.",
  {
    location: z.string().describe("Swedish city name (e.g. 'Stockholm', 'Malmö', 'Gothenburg', 'Kiruna') or lat,lon coordinates"),
  },

mcp-nordic