Migraine Barometric Pressure Map

Where barometric pressure fell across the U.S. in the last 24 hours. Tap a city for its numbers.

Big drop Some drop Steady

Loading the latest readings...

Biggest pressure drops in the last 24 hours

How to read this map

Each dot is a U.S. city with its own migraine forecast on this site. The color shows how far the barometric pressure fell there in the last 24 hours, measured at the nearest airport weather station. Red is a fall of 0.15 inHg (about 5 hPa) or more, yellow is 0.06 to 0.15 inHg, and green means it held steady or rose.

The map shows what the weather did, not what your head will do. Weather is one trigger among many, and only your own records can show whether it is one of yours.

Pressure map questions

Is there a barometric pressure map for migraines?

This is one. It shows how much the barometric pressure rose or fell in 170 U.S. cities over the last 24 hours, colored by the size of the fall. Pressure maps on weather sites are drawn for pilots and forecasters and show the pressure itself; this one shows the change, which is what people who track weather and migraine watch for.

How big a pressure drop matters for migraine?

There is no agreed number, and the studies that name one are small. In a 2011 diary study of 28 patients in Internal Medicine, migraine was more frequent when pressure fell by more than 5 hPa from the day of the attack to the next day. The map marks a fall of 0.15 inHg, about 5 hPa, in red because that is also the drop our Migraine Risk Index counts. Weather is a trigger for some people with migraine, not for everyone.

How often does the map update?

Every 15 minutes. The readings are the hourly observations that airport weather stations report to the U.S. National Weather Service, so each dot is the airport nearest that city.

Why does the map show the last 24 hours and not a forecast?

Measured readings are the same for everyone and easy to check against any weather report. For what comes next, open a city: each one has a 48-hour pressure chart and a risk score.

Sources: Kimoto K, et al. Influence of barometric pressure in patients with migraine headache. Internal Medicine, 2011 - NOAA Aviation Weather Center, airport observations - 2026 U.S. Migraine Risk Index

Know your personal triggers

This map shows the weather. MigrAid saves the barometric pressure with every migraine you log, so you can see whether pressure changes are really one of your triggers.

Download MigrAid for iOS Download MigrAid for Android