---
title: "Mascarene High: Monsoon Driver Explained | Model Diplomat"
description: "The Mascarene High is a high-pressure cell off Mauritius that powers the Indian summer monsoon's cross-equatorial winds. Key UPSC GS1 geography mechanism."
url: "https://modeldiplomat.com/learn/glossary/mascarene-high"
---

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Model Diplomat Research Team · Last reviewed June 22, 2026

TL;DR

- The Mascarene High is a semi-permanent subtropical high-pressure cell over the southern Indian Ocean near the Mascarene Islands that drives the Indian summer monsoon winds.
- How does the Mascarene High generate the Indian southwest monsoon?
- What is the relationship between the Mascarene High and the Somali Jet?
- How is the Mascarene High different from the ITCZ?
- Why does the Mascarene High matter for monsoon forecasting?

[Civil Service & Diplomatic Exams](https://modeldiplomat.com/learn/civil-services/glossary)Updated June 22, 2026

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In 2023, the India Meteorological Department noted that the build-up of the Mascarene High over the southern Indian Ocean was a factor it monitored while issuing its seasonal forecast ahead of the southwest monsoon's onset over Kerala.

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