constant pressure chart in a sentence

1. In addition to surface weather maps, weather agencies began to generate constant pressure charts.
2. Isotachs are particularly useful in diagnosing the location of the jet stream on upper level constant pressure charts, usually at or above the 300 hPa level.
3. Isotachs are particularly useful in diagnosing the location of the jet stream on upper level constant pressure charts, and are usually located at or above the 300 hPa level.
4. It's difficult to find constant pressure chart in a sentence.