A low pressure system is... - Bureau of Meteorology

A large area of low pressure dominates the weather across most of Ontario today. Mostly cloudy skies with a risk of thunderstorms over parts of the S and NE. Mix of sun and cloud over portions of the NW. | The Watchmen's Earth and Space connection

A blocking area of high pressure stops low pressure from moving in off the Atlantic Ocean. You can see the clouds from different directions colliding inside the area circled in red. It's the reason why there's no significant rainfall expected across the UK and Ireland. #highpressure #ukweather #weather | Liam Dutton

Low Pressure Area