SAN FRANCISCO - An unusual weather phenomenon called a heat burst took place in the Bay Area overnight that left many people asking, "What in the world is happening?" Well, here's the answer.
Just before midnight, a sudden heat spike in Vacaville caused the temperature to increase from 86 degrees to 95 degrees in just a matter of minutes.
A few hours later, at 5 a.m., a similar spike was recorded in the Oakland Hills, where the temperature went from 73 degrees to 85 degrees in a matter of minutes.
Immediately, after a nighttime thunderstorm, there is often a sudden downdraft of cool, dry air. As the air descends, it compresses and rapidly warms up. The result is a sharp temperature increase, or heat burst, like the ones recorded overnight in Vacaville and the Oakland Hills.
Thunderstorms occur only infrequently in the Bay Area; but, when they do, they generally leave us a lot to talk about.
Click here to watch the latest AccuWeather forecast, and click here to download the ABC7 News App to get your weather forecast on the go. And make sure you enable push alerts for immediate notifications and severe weather alerts.