Asthma and the weather
Smoke, smog, pollen, cold air and thunderstorms can all make breathing harder. Feelcaster watches air quality hour by hour and alerts you before it turns.
Get early accessWhat Feelcaster watches for asthma
Strongest first. You choose which triggers apply to you in the app.
Air quality
Smoke, smog and fine particles. Starts to count at: A US Air Quality Index above 50, strongest past 100.
Pollen
Tree, grass and weed pollen, carried further on windy days. Starts to count at: Moderate pollen and above.
Cold
Cold air, wind chill and fast drops in temperature. Starts to count at: A feels-like temperature below 50°F, or a drop of 8°F or more within 4 hours.
Thunderstorms
Thunderstorms, and air that is primed for them. High pollen makes them count for more. Starts to count at: Thunderstorms in the forecast.
One thing to do on those days
On bad air days keep windows closed, run a purifier if you have one and move workouts indoors. Keep the plan from your doctor close.
Asthma: questions people ask
What air quality number should I watch?
The US Air Quality Index runs from 0 to 500. Above 100 is unhealthy for sensitive groups, which includes many people with asthma. Feelcaster shows the index hour by hour and uses EPA AirNow monitor readings in the US.
Can Feelcaster tell me when to use my inhaler?
No. Feelcaster shares information about the air, not medical advice. Follow the plan you made with your doctor.
Can I watch my child’s asthma?
Yes. Add a child as someone you watch over and Feelcaster forecasts for them where they are.
Know before the weather does.
Feelcaster is coming to iPhone and Android. Join early access and we’ll send your invite.