The omega block creates stagnant weather, leading to heavy rain, floods, and temperature extremes across the U.S.

The great weather we're currently enjoying is down to a a blocking area of high pressure sitting just to the north of Ireland ...

It is defined by a powerful high pressure area with an area of low pressure "underneath" or south of the high pressure.

If the weather forecast seems stuck on repeat, as it was with cloudy, rainy days during the first weekend of May in the Edwardsville area, a local weather expert says it’s probably due to blocking ...