ProbeHarbor · kit
Pipe freeze forecast
A public outlook for unheated garages, crawlspaces, and attics: enter a US city or ZIP and see the next nights’ lows, hours below freezing, and a high / watch / low risk mark. It forecasts outdoor air from the National Weather Service. It does not measure your space — that is the probe dashboard.
What a night means
Water freezes at 32°F. Pipes in an unheated space usually need colder outdoor air before they freeze. Nights at or below about 20°F are marked high risk. Nights between 21°F and 32°F are watch — a long freeze, wind, or a drafty wall can still ice a line. Wind of 15 mph or more during freezing hours is called out. The hourly forecast refreshes about every 30 minutes and covers the United States and its territories.
| Night | Low | Below freezing | Risk |
|---|---|---|---|
| Tonight | 18°F | 9 h below 32°F | High |
| Monday | 27°F | 4 h below 32°F | Watch |
| Tuesday | 36°F | — | Low |
Illustrative row. The live page uses the NWS hourly forecast for the place you enter.
Embed
Other sites can frame a server-rendered outlook at /embed/pipe-freeze with latitude, longitude, and an optional place name. No client script. The snippet and attribution link are on the forecast page. The public freeze map — opt-in aggregates of spaces approaching freeze — has its own iframe and Markdown badge at /embed/freeze-map.