What does “Cold front around this day” mean?
Updated
Windline found a cold front close to when that day starts: a clear drop in temperature with rising air pressure, which often brings a wind shift, stronger gusts and rain. Open Fronts on the event page to see when and what changes.
How Windline spots a front
For each day inside the forecast window, Windline looks at the 12 hours either side of the start. A front shows when the 24-hour average temperature drops by at least 3°C (5°F) and the air pressure rises by at least 1.5 hPa. A drop of 6°C (11°F) or more is called a Strong cold front.
Where you’ll see it
- A Fronts button at the top of the event page, with a count when there are any.
- A Cold front around this day label on the days affected.
- In the Fronts panel, lines such as “Cold front · Wed 14 Oct, afternoon” and what changes on that day: how much cooler it gets, which way the wind turns and how strong the gusts become.
Why it matters
A front can turn a tailwind into a headwind halfway through a day, and bring rain and a sharp drop in temperature. If one is coming, pack for both sides of it and look at the day’s hour-by-hour wind chart.
Fronts can only be found for days with a forecast, so they appear about 10 days ahead at most. If the panel says “No cold fronts showing over these days”, none are forecast.