- Arcus cloud on gust front of an MCS (Mesoscale Convective System)
![Arcus cloud on gust front of an MCS (Mesoscale Convective System)](http://www.skyartstock.com/peas/W931151Z-SKYART.jpg)
- W931151Z
- An approaching MCS (Mesoscale Convective System) has a gust front boundary along its forward side with Arcus cloud band. The shelf cloud is thin and relatively high based, with a lower lip closer to the rain. The air is stable, allowing the cloud to remain smooth and uniform.
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