When storms are in the forecast, we often show a graphic known as Available Storm Energy, marked with purple colors (pictured ...

Weather charts can include many different meteorological elements and analyses. They may be a surface chart or it could be a chart describing what is going on at 30,000 feet in the atmosphere.

That said, the biggest role in ocean-surface temperatures is played by the El Niño-Southern Oscillation (ENSO), a natural phenomenon that influences weather patterns around the world.

NOAA now has every day's surface weather chart available online -- back to 1871!!! It's a great way to peek into the past and see not only how weather was observed back then, but can be a valuable ...

Weather Surface low pressure is associated with a trough on a upper level isobaric chart. I am having trouble understanding this becauseI associate surface low pressure with warm air which ...

The year brought a rash of regional records and extreme events, including floods, wildfires, drought and heatwaves. Below are eight charts that help make sense of it.

Forecasters start with the big picture and from high up in the stratosphere and work their way down to the surface weather. There are important weather relationships between the 500mb level chart ...

This is the wind flow and the storm center positions at around 15,000 feet up in the atmosphere. I could derive the surface positions of weather features with this one 500 mb chart.