Daily forecast check for severe conditions. Tiered alerts on extreme cold, extreme heat, and dangerous weather wording.

Provided free and as is, without warranty of any kind — including merchantability, fitness for a particular purpose, and the accuracy or completeness of any result. See the licence. You are responsible for checking what this produces before relying on it.

Weather Severe Watch

Daily forecast check that fires tiered alerts based on temperature extremes and dangerous weather wording.

What it does

Every day (default 08:00 — edit the schedule when you install), the monitor calls weather-forecast for the configured location. The when: block has three tiered arms that run top-to-bottom; the first one that matches wins:

Extreme cold — temperature ≤ 32°F (freezing)
Extreme heat — temperature ≥ 95°F
Storm wording — conditions contains "storm" (case-sensitive substring match against the forecast's condition string)
Else — quiet (nothing: — no notification noise on normal days)

This is the canonical "multi-arm tiered alert" pattern. Only ONE arm fires per fire, so a heat-stricken stormy day will notify on the heat arm (first match) and skip the storm arm.

Edit before installing

In monitor.iml:

check.args.latitude / longitude — set to your coordinates. 40.7128, -74.0060 is New York.
check.args.location — friendly name shown in subjects/bodies.
Adjust the three thresholds to your climate. The weather-forecast tool reports °F (temperature_unit=fahrenheit), so thresholds are °F: ≤ 32 (freezing) and ≥ 95 (severe heat). For a temperate climate you might prefer ≤ 10 and ≥ 100.
The storm substring match is loose — tighten with tornado, hurricane, blizzard, etc. for narrower alerts.

Bindings used

{{check.temperature}} — current temperature in °F (number).
{{check.conditions}} — short conditions string (e.g. "clear sky", "moderate rain").
{{check.forecast}} — formatted multi-line forecast.
{{monitor.firedAt}} — fire timestamp.

The weather-forecast tool publishes these three fields; see the tool's README for full output detail.

Tool used

weather-forecast — hub-installed IML tool backed by Open-Meteo. No API key required.

Pattern showcase

This monitor demonstrates the multi-arm tiered alert shape — useful any time you want different severities to produce different notifications. The ordering matters: put the most severe / specific arms first so they win over broader fallbacks.