Why is the weatherPressuring.me?

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How it works

Pressuring.me looks at the air-pressure forecast for the place you choose and points out the days when pressure is expected to fall or rise sharply. Many weather-sensitive people say these are the days they feel worst.

1. You pick a place

Start typing a city, town or postcode and pick it from the suggestions. We never ask for your GPS position. Your choice is remembered only on your own device, so next time the page opens straight on your forecast. Press Change to pick another place.

2. You pick what to track

3. We flag the big swings

For every hour of the next 7 days we compare the forecast pressure with the pressure 24 hours earlier. If the difference reaches 5 hPa or more, the day is marked as a big drop or a big rise. Each swing is counted once, on the day where most of it happens, so one weather front does not show up twice.

Why 5 hPa? Everyday changes usually stay within a few hectopascals. Swings of 5–10 hPa in a day typically come with passing fronts or strong highs – the weather changes people most often notice. It is a practical threshold, not a medical one: you may react to smaller changes, or not at all.

4. Reading the forecast

Where the data comes from

The forecast comes from the Norwegian Meteorological Institute (MET Norway), which publishes free weather forecasts for any point on Earth. Outside the Nordic countries it is based on the global model of the European Centre for Medium-Range Weather Forecasts (ECMWF). The forecast is refreshed several times a day; we keep a copy for up to about 30 minutes so the service stays fast and fair to the data provider.

All pressure values are mean sea-level pressure – the number weather services and weather maps use. A barometer at home may show a lower number if you live high above the sea, but the changes are the same, and changes are what we track.

Days are counted in the approximate local time of the place you chose.